The document discusses hydrogen energy and fuel cells. It provides an introduction and history of fuel cells, explaining their theory of operation. It then discusses hydrogen production and storage methods. The document outlines the different types of fuel cells - alkaline, phosphoric acid, molten carbonate, proton exchange membrane, and solid oxide fuel cells - and compares their characteristics. It also covers fuel cell electrical properties, efficiency comparisons to other technologies, advantages and disadvantages, and applications. The overall document provides a comprehensive overview of hydrogen energy and the different aspects of fuel cells.
This document provides an overview of fuel cells, including their construction, working, types, advantages, disadvantages, and applications. It describes how a fuel cell works by converting chemical energy from hydrogen into electrical energy through an electrochemical reaction with oxygen. The main types of fuel cells covered are alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, and solid oxide fuel cells. The advantages include high efficiency, zero emissions, and quiet operation. Disadvantages include the high cost of the technology and fuel production. Applications mentioned include power generation, transportation, portable electronics, and backup power supplies.
This document provides an overview of fuel cells presented by Mahida Hiren R. It begins with an introduction to fuel cells, explaining that they convert hydrogen and oxygen into water and produce electricity and heat in the process. It then discusses the various types of fuel cells, including hydrogen oxygen cells, phosphoric acid cells, molten carbonate cells, solid oxide cells, and cells using fuels like methanol, ammonia, and hydrazine. The document also covers fuel cell design principles, operation, efficiency, applications, and the sources of polarization that reduce fuel cell performance.
The document discusses fuel cells, including:
1) A fuel cell generates electricity through an electrochemical reaction between a fuel (typically hydrogen) and oxygen, with water and heat as byproducts.
2) Fuel cells have several types but all consist of an anode, cathode, and electrolyte; they operate by separating the fuel from the oxygen to prevent combustion.
3) Applications include stationary power systems, transportation such as fuel cell vehicles and buses, and portable power devices, with each fuel cell type suited to certain uses.
This document provides an overview of fuel cell technology. It begins with an introduction that defines fuel cells as devices that convert chemical energy from fuels like hydrogen into electrical energy. It then discusses why fuel cells are useful by noting issues with conventional energy sources like pollution. The document proceeds to compare fuel cells to batteries and describe the basic construction and working of fuel cells. It outlines the main types of fuel cells and provides details on proton exchange membrane fuel cells. Applications and advantages of fuel cells are highlighted, with high efficiency and low emissions mentioned. The disadvantages of fuel cells like the difficulty of storing hydrogen are also noted.
The document presents a presentation on fuel cells. It discusses that fuel cells convert hydrogen and oxygen into water and in the process produce electricity and heat. Sir William Grove invented the first fuel cell in 1839. Fuel cells have several advantages over traditional power sources like high efficiency, low emissions, and no moving parts. While the initial costs are high, fuel cells can power vehicles, buildings, and portable electronics. Major organizations are working to further develop fuel cell technology to address the global energy demand.
presentation on NANO-TECH REGENERATIVE FUEL CELLcutejuhi
This document describes a nano-tech regenerative fuel cell that uses carbon nanotubes for onboard hydrogen storage. Hydrogen is fed into a fuel cell where it reacts with oxygen to produce electricity and water. The water is then electrolyzed to regenerate hydrogen, making this a renewable system. Integrating nanotechnology allows for easier hydrogen storage and higher fuel cell efficiency compared to internal combustion engines. This nano-tech regenerative fuel cell provides a pollution-free way to power vehicles.
Proton Exchange Membrane Fuel Cells (PEMFC) are promising contender as the next generation energy source because of their striking features including high energy density, low operating temperature, easy scale up and zero environmental pollution.
Fuel cells provide a promising alternative source of electricity. They convert chemical energy directly into electrical energy through an electrochemical reaction between hydrogen and oxygen, producing only water vapor and heat as byproducts. There are several types of fuel cells but proton-exchange membrane (PEM) fuel cells are well suited for transportation and small stationary power applications due to their high power density and low operating temperatures. A fuel cell consists of an anode and cathode separated by an electrolyte that allows protons to pass through but blocks electrons, forcing them into an external circuit where they can power devices before being reunited with oxygen at the cathode. While fuel cells have advantages over traditional combustion engines like higher efficiency and lack of emissions, challenges remain around infrastructure, cost and
This document provides an overview of fuel cells, including their construction, working, types, advantages, disadvantages, and applications. It describes how a fuel cell works by converting chemical energy from hydrogen into electrical energy through an electrochemical reaction with oxygen. The main types of fuel cells covered are alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, and solid oxide fuel cells. The advantages include high efficiency, zero emissions, and quiet operation. Disadvantages include the high cost of the technology and fuel production. Applications mentioned include power generation, transportation, portable electronics, and backup power supplies.
This document provides an overview of fuel cells presented by Mahida Hiren R. It begins with an introduction to fuel cells, explaining that they convert hydrogen and oxygen into water and produce electricity and heat in the process. It then discusses the various types of fuel cells, including hydrogen oxygen cells, phosphoric acid cells, molten carbonate cells, solid oxide cells, and cells using fuels like methanol, ammonia, and hydrazine. The document also covers fuel cell design principles, operation, efficiency, applications, and the sources of polarization that reduce fuel cell performance.
The document discusses fuel cells, including:
1) A fuel cell generates electricity through an electrochemical reaction between a fuel (typically hydrogen) and oxygen, with water and heat as byproducts.
2) Fuel cells have several types but all consist of an anode, cathode, and electrolyte; they operate by separating the fuel from the oxygen to prevent combustion.
3) Applications include stationary power systems, transportation such as fuel cell vehicles and buses, and portable power devices, with each fuel cell type suited to certain uses.
This document provides an overview of fuel cell technology. It begins with an introduction that defines fuel cells as devices that convert chemical energy from fuels like hydrogen into electrical energy. It then discusses why fuel cells are useful by noting issues with conventional energy sources like pollution. The document proceeds to compare fuel cells to batteries and describe the basic construction and working of fuel cells. It outlines the main types of fuel cells and provides details on proton exchange membrane fuel cells. Applications and advantages of fuel cells are highlighted, with high efficiency and low emissions mentioned. The disadvantages of fuel cells like the difficulty of storing hydrogen are also noted.
The document presents a presentation on fuel cells. It discusses that fuel cells convert hydrogen and oxygen into water and in the process produce electricity and heat. Sir William Grove invented the first fuel cell in 1839. Fuel cells have several advantages over traditional power sources like high efficiency, low emissions, and no moving parts. While the initial costs are high, fuel cells can power vehicles, buildings, and portable electronics. Major organizations are working to further develop fuel cell technology to address the global energy demand.
presentation on NANO-TECH REGENERATIVE FUEL CELLcutejuhi
This document describes a nano-tech regenerative fuel cell that uses carbon nanotubes for onboard hydrogen storage. Hydrogen is fed into a fuel cell where it reacts with oxygen to produce electricity and water. The water is then electrolyzed to regenerate hydrogen, making this a renewable system. Integrating nanotechnology allows for easier hydrogen storage and higher fuel cell efficiency compared to internal combustion engines. This nano-tech regenerative fuel cell provides a pollution-free way to power vehicles.
Proton Exchange Membrane Fuel Cells (PEMFC) are promising contender as the next generation energy source because of their striking features including high energy density, low operating temperature, easy scale up and zero environmental pollution.
Fuel cells provide a promising alternative source of electricity. They convert chemical energy directly into electrical energy through an electrochemical reaction between hydrogen and oxygen, producing only water vapor and heat as byproducts. There are several types of fuel cells but proton-exchange membrane (PEM) fuel cells are well suited for transportation and small stationary power applications due to their high power density and low operating temperatures. A fuel cell consists of an anode and cathode separated by an electrolyte that allows protons to pass through but blocks electrons, forcing them into an external circuit where they can power devices before being reunited with oxygen at the cathode. While fuel cells have advantages over traditional combustion engines like higher efficiency and lack of emissions, challenges remain around infrastructure, cost and
This document discusses fuel cells, including their parts, working principle, types, advantages, disadvantages, and applications. Fuel cells generate electricity through an electrochemical reaction between hydrogen and oxygen, without combustion. They have higher efficiency than combustion engines and produce only water emissions. However, fuel cells are currently more expensive than batteries. Major applications of fuel cells include powering vehicles, devices, and buildings. Several organizations are working to develop fuel cell technology further.
This document discusses carbon capture and storage (CCS) technologies which aim to prevent carbon dioxide emissions from fossil fuel use. It describes three main methods for capturing CO2 - pre-combustion, post-combustion, and oxyfuel combustion. The captured CO2 can be transported via pipeline and stored underground in geological formations or utilized for enhanced oil recovery. CCS has the potential to reduce CO2 emissions by 80-90% but also increases energy needs and costs for power plants. There are environmental concerns about the impacts of long-term CO2 storage or leakage.
The presentation discusses the history and future potential of fuel cells and hydrogen as alternatives to oil. It notes that fuel cells were first developed in 1839 and used in the 1960s by NASA for the Apollo missions. The Bush Administration has committed to developing hydrogen technologies to reduce oil demand and carbon emissions by 2040. Fuel cells work by using hydrogen and oxygen to produce electricity through chemical reactions, with water and heat as byproducts. Challenges include cost, storage, and infrastructure, but applications include transportation, stationary power sources, and more. The presentation highlights examples of fuel cell use in vehicles, rural electrification projects, and more to argue that hydrogen technologies represent a promising clean energy future.
A solid oxide fuel cell (SOFC) works by using oxygen ions conducting through a solid ceramic electrolyte to generate electricity from hydrogen or other fuels. It consists of an anode and cathode separated by an electrolyte, and produces electricity through an electrochemical reaction without combustion. SOFCs operate at high temperatures between 1000-1800 degrees F, which allows them to use a wide variety of fuels. They are more efficient than traditional power generation and are being developed for applications such as stationary power plants, transportation, and residential use.
1. A fuel cell converts chemical energy directly into electricity through electrochemical reactions between hydrogen and oxygen without combustion.
2. There are several types of fuel cells that differ in their electrolyte material including polymer electrolyte membrane fuel cells, alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, and solid oxide fuel cells.
3. Each fuel cell type has advantages and disadvantages for different applications depending on factors like operating temperature, catalyst requirements, and fuel used.
Aluminum Air Battery: How Do They Work? (Plus DIY)Dr.Raja R
Aluminum Air Battery: How Do They Work? (Plus DIY)
, Aluminum Air Battery Experiment, Procedure of Making Simple Aluminum Air Battery, Working Principle of Aluminum Air Battery, Chemical Reaction of Aluminum Air Battery, Aluminum Air Battery Equation,
Fuel cells provide a clean source of power by converting chemical energy from fuels into electrical energy. They have two electrodes and an electrolyte in between that produces DC power. Fuel cells are classified based on their electrolyte type and operating temperature. Some key fuel cell types include proton exchange membrane fuel cells, alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, and solid oxide fuel cells. Fuel cells have applications in transportation, portable power devices, and stationary power generation due to their high efficiency and low emissions. However, fuel cells still face challenges related to cost, infrastructure, and durability that must be addressed for widespread commercialization.
This document discusses molten carbonate fuel cells (MCFCs). It explains that MCFCs use molten carbonate salts as an electrolyte and operate at high temperatures between 873K-923K. MCFCs are primarily used for stationary power generation between 50 kW to 5 MW. The document outlines the components and reactions in an MCFC, advantages such as high efficiency, and disadvantages including issues with corrosion and electrolyte retention. It concludes that MCFCs have potential for energy conversion but need improvements to reduce costs and increase lifetime.
Hydrogen can be produced through various methods such as steam reforming of natural gas, partial oxidation of hydrocarbons, thermochemical water splitting using high temperatures, electrolysis of water, radiolysis of water through nuclear radiation, and biological and enzymatic conversion of biomass. Each method has its advantages and disadvantages related to efficiency, costs, environmental impacts, and scalability. Hydrogen is a very useful energy carrier due to its high energy content per unit mass and non-polluting nature when used.
PEMFC (proton exchange membrane)
DMFC (direct methanol)
SOCF (solid oxide)
AFC (alkaline)
PAFC (phosphoric acid)
MCFC (Molten Carbonate)
PEM Fuel Cell
A fuel cell is a battery that produces DC current and voltage
Most fuel cells use hydrogen which burns cleaner compared to hydrocarbon fuels
A fuel cell will keep producing electricity as long as fuel is supplied
The energy efficiency of fuel cells is high when compared to many other energy systems
There is great interest in fuel cells for automotive and electronic applications
There will be employment for technicians particularly in Ohio’s fuel cell industry.
This document provides an overview of fuel cell technology. It discusses how fuel cells work by electrochemically combining hydrogen and oxygen to generate electricity and heat. The document describes the key components of a fuel cell and different types of fuel cells. It also outlines various applications of fuel cell technology in transportation, stationary power generation, portable power devices, and more. The benefits of fuel cells are highlighted as being clean, efficient, reliable and durable. Challenges to commercialization are noted as reducing costs, developing hydrogen infrastructure, and managing heat from the cells.
The document summarizes key information about fuels and fuel technology. It defines what a fuel is, describes different types of fuels including solid fuels like coal and wood, liquid fuels like petroleum, and gaseous fuels like natural gas. It explains the energy content and combustion of different fuels. Key processes like fractional distillation of crude oil and destructive distillation of coal are summarized. Common fuel uses in transportation, electricity generation, and industry are also highlighted.
The document summarizes the key design considerations for hydrogen fuel cells. It describes how William Grove first demonstrated a fuel cell in 1839 by reversing the electrolysis of water into hydrogen and oxygen to generate a current. The basic operation of a hydrogen fuel cell involves hydrogen ions passing through a proton exchange membrane to the cathode where they combine with oxygen and electrons to form water, producing electricity. Connecting multiple fuel cells in series into a stack increases the overall voltage output, which is achieved through the use of bipolar plates that connect the anode of one cell to the cathode of the next. Proper gas flow and cooling design are also important considerations.
SEMINAR TOPIC IN MECHANICAL ENGINEERING ON FUEL CELLS. SHORT AND BRIEF PRESENTATION ON FUEL CELLS. The presentation consists for preview till conclusion and is meant for minor projects submission by engineering students.
A solar vehicle is powered by solar energy collected from solar panels on its surface. It consists of a solar array, power trackers, an electric motor, speed controller, chassis, battery, and wheels. The solar array produces electricity from sunlight which is conditioned and stored by the power trackers and battery for powering the electric motor. The speed controller regulates the motor based on driving demands while the lightweight chassis provides strength and safety.
The document summarizes key concepts about lead-acid batteries, including:
1) Lead-acid batteries use lead and lead dioxide electrodes with a sulfuric acid electrolyte. Chemical reactions at the electrodes involve the transfer of electrons between the electrodes and ions in the electrolyte.
2) As the battery charges and discharges, the concentration of the sulfuric acid electrolyte changes. This affects the voltage according to the Nernst equation.
3) Factors like internal resistance and surface chemistry effects cause the terminal voltage to differ from the theoretical voltage. Battery models account for these factors.
The document discusses proton exchange membrane fuel cells (PEMFC). It provides an overview of fuel cells in general and describes the history and basic components of PEMFCs specifically. PEMFCs use a solid polymer electrolyte that allows protons to pass through but blocks electrons and gases. They operate at a low temperature of 50-100°C and have advantages like rapid load following, compact design, and high power density. Applications include transportation, portable power, and stationary power generation. The current PEM market is dominated by portable devices, with transportation and stationary power making up smaller shares.
this is the representation of hydrogen fuel. In this presentation we showed how hydrogen is useful for future consumption of fuel. We know that in the future the non-renewable sources of energy will be extincted so we have to concentrate on conventional sources of energy like solar energy energy, nuclear energy, hydrogen fuel. Because hydrogen is highly combustible and produce large of energy so we consider to use hydrogen fuel in future aspect
This document discusses direct methanol fuel cells (DMFCs) as a form of clean technology. It provides an introduction to clean technology and significance, then discusses DMFCs specifically. DMFCs use methanol as a fuel instead of hydrogen, which offers benefits like higher energy density and easier transportation. The document outlines the electrochemical reactions in a DMFC and describes its components like the proton exchange membrane and fuel cell stack. It also discusses the methanol oxidation mechanism, experimental setup, effects of temperature and concentration on output voltage, and challenges like slow reaction kinetics and methanol crossover. Finally, it analyzes costs and lists potential applications of DMFC technology.
The document discusses different types of fuel cells, including their basic working principles and comparisons. It provides information on proton exchange membrane fuel cells (PEMFC), alkaline fuel cells (AFC), phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), solid oxide fuel cells (SOFC), and others. It compares factors such as efficiency, capital cost, and operating costs between different generation systems like reciprocating engines, gas turbines, photovoltaics, wind turbines, and fuel cells.
O documento discute como frameworks como Cyber Kill Chain e ATT&CK podem ajudar a criar cenários e detectar ameaças. Ele explica o que é threat hunting, apresenta os principais frameworks e fornece um exemplo de como eles podem ser usados para analisar dados e validar defesas contra ameaças.
This document provides information about the planned George Park project including the park site size and location, timeline for development, funding amount, design considerations regarding drought conditions and playground surfacing, typical amenities for a neighborhood park, and a proposed prehistoric theme. It outlines the park planning process and invites community members to provide input on an initial concept plan and design.
This document discusses fuel cells, including their parts, working principle, types, advantages, disadvantages, and applications. Fuel cells generate electricity through an electrochemical reaction between hydrogen and oxygen, without combustion. They have higher efficiency than combustion engines and produce only water emissions. However, fuel cells are currently more expensive than batteries. Major applications of fuel cells include powering vehicles, devices, and buildings. Several organizations are working to develop fuel cell technology further.
This document discusses carbon capture and storage (CCS) technologies which aim to prevent carbon dioxide emissions from fossil fuel use. It describes three main methods for capturing CO2 - pre-combustion, post-combustion, and oxyfuel combustion. The captured CO2 can be transported via pipeline and stored underground in geological formations or utilized for enhanced oil recovery. CCS has the potential to reduce CO2 emissions by 80-90% but also increases energy needs and costs for power plants. There are environmental concerns about the impacts of long-term CO2 storage or leakage.
The presentation discusses the history and future potential of fuel cells and hydrogen as alternatives to oil. It notes that fuel cells were first developed in 1839 and used in the 1960s by NASA for the Apollo missions. The Bush Administration has committed to developing hydrogen technologies to reduce oil demand and carbon emissions by 2040. Fuel cells work by using hydrogen and oxygen to produce electricity through chemical reactions, with water and heat as byproducts. Challenges include cost, storage, and infrastructure, but applications include transportation, stationary power sources, and more. The presentation highlights examples of fuel cell use in vehicles, rural electrification projects, and more to argue that hydrogen technologies represent a promising clean energy future.
A solid oxide fuel cell (SOFC) works by using oxygen ions conducting through a solid ceramic electrolyte to generate electricity from hydrogen or other fuels. It consists of an anode and cathode separated by an electrolyte, and produces electricity through an electrochemical reaction without combustion. SOFCs operate at high temperatures between 1000-1800 degrees F, which allows them to use a wide variety of fuels. They are more efficient than traditional power generation and are being developed for applications such as stationary power plants, transportation, and residential use.
1. A fuel cell converts chemical energy directly into electricity through electrochemical reactions between hydrogen and oxygen without combustion.
2. There are several types of fuel cells that differ in their electrolyte material including polymer electrolyte membrane fuel cells, alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, and solid oxide fuel cells.
3. Each fuel cell type has advantages and disadvantages for different applications depending on factors like operating temperature, catalyst requirements, and fuel used.
Aluminum Air Battery: How Do They Work? (Plus DIY)Dr.Raja R
Aluminum Air Battery: How Do They Work? (Plus DIY)
, Aluminum Air Battery Experiment, Procedure of Making Simple Aluminum Air Battery, Working Principle of Aluminum Air Battery, Chemical Reaction of Aluminum Air Battery, Aluminum Air Battery Equation,
Fuel cells provide a clean source of power by converting chemical energy from fuels into electrical energy. They have two electrodes and an electrolyte in between that produces DC power. Fuel cells are classified based on their electrolyte type and operating temperature. Some key fuel cell types include proton exchange membrane fuel cells, alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, and solid oxide fuel cells. Fuel cells have applications in transportation, portable power devices, and stationary power generation due to their high efficiency and low emissions. However, fuel cells still face challenges related to cost, infrastructure, and durability that must be addressed for widespread commercialization.
This document discusses molten carbonate fuel cells (MCFCs). It explains that MCFCs use molten carbonate salts as an electrolyte and operate at high temperatures between 873K-923K. MCFCs are primarily used for stationary power generation between 50 kW to 5 MW. The document outlines the components and reactions in an MCFC, advantages such as high efficiency, and disadvantages including issues with corrosion and electrolyte retention. It concludes that MCFCs have potential for energy conversion but need improvements to reduce costs and increase lifetime.
Hydrogen can be produced through various methods such as steam reforming of natural gas, partial oxidation of hydrocarbons, thermochemical water splitting using high temperatures, electrolysis of water, radiolysis of water through nuclear radiation, and biological and enzymatic conversion of biomass. Each method has its advantages and disadvantages related to efficiency, costs, environmental impacts, and scalability. Hydrogen is a very useful energy carrier due to its high energy content per unit mass and non-polluting nature when used.
PEMFC (proton exchange membrane)
DMFC (direct methanol)
SOCF (solid oxide)
AFC (alkaline)
PAFC (phosphoric acid)
MCFC (Molten Carbonate)
PEM Fuel Cell
A fuel cell is a battery that produces DC current and voltage
Most fuel cells use hydrogen which burns cleaner compared to hydrocarbon fuels
A fuel cell will keep producing electricity as long as fuel is supplied
The energy efficiency of fuel cells is high when compared to many other energy systems
There is great interest in fuel cells for automotive and electronic applications
There will be employment for technicians particularly in Ohio’s fuel cell industry.
This document provides an overview of fuel cell technology. It discusses how fuel cells work by electrochemically combining hydrogen and oxygen to generate electricity and heat. The document describes the key components of a fuel cell and different types of fuel cells. It also outlines various applications of fuel cell technology in transportation, stationary power generation, portable power devices, and more. The benefits of fuel cells are highlighted as being clean, efficient, reliable and durable. Challenges to commercialization are noted as reducing costs, developing hydrogen infrastructure, and managing heat from the cells.
The document summarizes key information about fuels and fuel technology. It defines what a fuel is, describes different types of fuels including solid fuels like coal and wood, liquid fuels like petroleum, and gaseous fuels like natural gas. It explains the energy content and combustion of different fuels. Key processes like fractional distillation of crude oil and destructive distillation of coal are summarized. Common fuel uses in transportation, electricity generation, and industry are also highlighted.
The document summarizes the key design considerations for hydrogen fuel cells. It describes how William Grove first demonstrated a fuel cell in 1839 by reversing the electrolysis of water into hydrogen and oxygen to generate a current. The basic operation of a hydrogen fuel cell involves hydrogen ions passing through a proton exchange membrane to the cathode where they combine with oxygen and electrons to form water, producing electricity. Connecting multiple fuel cells in series into a stack increases the overall voltage output, which is achieved through the use of bipolar plates that connect the anode of one cell to the cathode of the next. Proper gas flow and cooling design are also important considerations.
SEMINAR TOPIC IN MECHANICAL ENGINEERING ON FUEL CELLS. SHORT AND BRIEF PRESENTATION ON FUEL CELLS. The presentation consists for preview till conclusion and is meant for minor projects submission by engineering students.
A solar vehicle is powered by solar energy collected from solar panels on its surface. It consists of a solar array, power trackers, an electric motor, speed controller, chassis, battery, and wheels. The solar array produces electricity from sunlight which is conditioned and stored by the power trackers and battery for powering the electric motor. The speed controller regulates the motor based on driving demands while the lightweight chassis provides strength and safety.
The document summarizes key concepts about lead-acid batteries, including:
1) Lead-acid batteries use lead and lead dioxide electrodes with a sulfuric acid electrolyte. Chemical reactions at the electrodes involve the transfer of electrons between the electrodes and ions in the electrolyte.
2) As the battery charges and discharges, the concentration of the sulfuric acid electrolyte changes. This affects the voltage according to the Nernst equation.
3) Factors like internal resistance and surface chemistry effects cause the terminal voltage to differ from the theoretical voltage. Battery models account for these factors.
The document discusses proton exchange membrane fuel cells (PEMFC). It provides an overview of fuel cells in general and describes the history and basic components of PEMFCs specifically. PEMFCs use a solid polymer electrolyte that allows protons to pass through but blocks electrons and gases. They operate at a low temperature of 50-100°C and have advantages like rapid load following, compact design, and high power density. Applications include transportation, portable power, and stationary power generation. The current PEM market is dominated by portable devices, with transportation and stationary power making up smaller shares.
this is the representation of hydrogen fuel. In this presentation we showed how hydrogen is useful for future consumption of fuel. We know that in the future the non-renewable sources of energy will be extincted so we have to concentrate on conventional sources of energy like solar energy energy, nuclear energy, hydrogen fuel. Because hydrogen is highly combustible and produce large of energy so we consider to use hydrogen fuel in future aspect
This document discusses direct methanol fuel cells (DMFCs) as a form of clean technology. It provides an introduction to clean technology and significance, then discusses DMFCs specifically. DMFCs use methanol as a fuel instead of hydrogen, which offers benefits like higher energy density and easier transportation. The document outlines the electrochemical reactions in a DMFC and describes its components like the proton exchange membrane and fuel cell stack. It also discusses the methanol oxidation mechanism, experimental setup, effects of temperature and concentration on output voltage, and challenges like slow reaction kinetics and methanol crossover. Finally, it analyzes costs and lists potential applications of DMFC technology.
The document discusses different types of fuel cells, including their basic working principles and comparisons. It provides information on proton exchange membrane fuel cells (PEMFC), alkaline fuel cells (AFC), phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), solid oxide fuel cells (SOFC), and others. It compares factors such as efficiency, capital cost, and operating costs between different generation systems like reciprocating engines, gas turbines, photovoltaics, wind turbines, and fuel cells.
O documento discute como frameworks como Cyber Kill Chain e ATT&CK podem ajudar a criar cenários e detectar ameaças. Ele explica o que é threat hunting, apresenta os principais frameworks e fornece um exemplo de como eles podem ser usados para analisar dados e validar defesas contra ameaças.
This document provides information about the planned George Park project including the park site size and location, timeline for development, funding amount, design considerations regarding drought conditions and playground surfacing, typical amenities for a neighborhood park, and a proposed prehistoric theme. It outlines the park planning process and invites community members to provide input on an initial concept plan and design.
Dashboards: Using data to find out what's really going onrouanw
How many people are using your website right now? Which features are their favourite? Are they experiencing errors? Getting stuck? How are your servers performing? Is your code easy to work with? Are you making money? Dashboards are a way to have the answers to these questions all around you, all the time.
Join Rouan as he shows you why building dashboards will change the way you look at software. He’ll share concrete examples of the kinds of dashboards you could build and will show you the tools with which you can build them. He’ll introduce you to principles that will guide you as you make decisions about what you dashboard, how you treat data and how you use data to make decisions.
The survey found that the most commonly used NOC tools are for monitoring (e.g. CACTI, Nagios), problem management (e.g. Nagios, Request Tracker), and ticketing (e.g. Request Tracker, OTRS). Performance management tools like Iperf, Wireshark and MRTG were also widely used. Configuration management was commonly done using tools like Git, RANCID, Subversion and CVS. The survey provided insights into the software tools used by NOCs and helped identify trends in tools that have increased in importance since a previous survey in 2011.
Can you handle The TRUTH ,..? Missing page history of JESUS and Hidden TRUTHHeri kusrianto
Discovered TRUTH and hidden Treasure, let it be known that JESUS was actually a MUSLIM and he taught ISLAM, on the other hand CHRISTIANITY was created by PAUL of Tarsus backed by ROMAN EMPIRE
Using NLP to find contextual relationships between fashion housesSushant Shankar
The document proposes a method to extract contextual relationships between fashion houses from online blogs and articles. It uses named entity recognition and dependency parsing to extract pairs of fashion house entities and contextual phrases describing their relationships from sentences. It evaluates the extracted pairs and contexts by checking the accuracy of the top 10 relationships and contextual phrases against other sources. It finds that 100% of the top relationships were accurate and 92.1% of extracted contextual phrases were accurate and informative.
Respond to and troubleshoot production incidents like an saTom Cudd
So it's 4 AM and you just got a call from a panicked executive that the system is down! Oh noes! What do you do? Troubleshoot LIKE AN SA. I know "Systems Administrator" is not the cool industry term anymore, but that mentality for fixing the big live problem, like RIGHT NOW can still help today.
You're probably in the job you're in because you're AWESOME at figuring out what's wrong and fixing problems. But your projects have grown, your team has grown, and the expectations grow with them. How do you deal with these new found responsibilities? LIKE AN SA. There are some simple processes you can put in place to help make your life easier. We'll discuss a framework for incident response, a step-by-step guide for troubleshooting production issues, and how to then learn from these outages to prevent problems from happening again.
This document discusses PNG image forensic analysis and describes how the speaker analyzed a corrupted PNG file from the Plaid CTF 2015 competition. It provides an overview of PNG structure including chunks containing image data and metadata, and describes how the speaker repaired the header and IDAT chunks by adjusting offsets and replacing carriage returns to recover half the image before the competition ended.
IBM Bluemix OpenWhisk: Serverless Conference 2016, London, UK: The Future of ...OpenWhisk
Learn more about the IBM Bluemix OpenWhisk, a serverless event-driven compute platform, which quickly executes application logic in response to events or direct invocations from web/mobile apps or other endpoints.
Hans had worked for seven years for a miller. When Hans finished his work, the miller gave him a large bag of gold as payment. Hans grew tired as he carried the heavy bag of gold on his three mile walk home. Along the way, a rider on a horse approached Hans and saw that he looked tired from carrying the gold. Hans expressed that he wished he had a horse to ride home so he wouldn't have to carry the heavy bag.
Finding HMAS Sydney Chapter 5 - Kormoran Database & the Mathematics of Reliab...Elk Software Group
The document discusses a database containing reports from interrogations of survivors from the German heavy cruiser Kormoran after it sank the Australian light cruiser HMAS Sydney II in 1941. The database included 62 reports, with around 48 from people in a position to know details. Around 30 reports referred to a location of 26 degrees south and 111 degrees east, showing concentration of reports around that area. The document examines whether the reports reflect a carefully rehearsed story, ignorance, or expert knowledge with random errors, and uses Zipf's law to analyze the frequency distribution of location reports as being consistent with reliability.
This document discusses various topics related to global warming and its impacts. It provides details on how scientists measure CO2 levels in snow and its connection to temperature. Warmer oceans lead to stronger storms. Permafrost is melting which affects infrastructure and releases stored carbon. The Arctic ice cap has significantly decreased in size and thickness in recent decades. Population growth and increased consumption contribute to higher CO2 emissions. Modern technology and its waste products also increase emissions. The highest emitting country is the US. Continued global warming could lead to issues with water and food availability and significant sea level rise that impacts many coastal areas.
DOXLON November 2016: Facebook Engineering on cgroupv2Outlyer
Cgroupv1 (or just "cgroups") has helped revolutionize the way that we manage and use containers over the past 8 years. In kernel 4.5, a complete overhaul is coming -- cgroupv2. This talk will go into why a new control group system was needed, the changes from cgroupv1, and practical uses that you can apply to improve the level of control you have over the processes on your servers.
The document describes a watering hole attack campaign that targeted military websites. It used a zero-day exploit in Internet Explorer 10 along with a malicious Flash file to download an image file containing hidden payload data. This payload contained two malware files - a DLL and a ZxShell backdoor executable. The backdoor made DNS queries to malicious domains and attempted to connect on port 443. The content is provided without warranty and solely represents the author's views.
This document provides information about the InfoSec World 2017 Conference & Expo taking place April 3-5, 2017 in Orlando, Florida. The conference will feature over 70 sessions across 7 tracks, 10 workshops, and keynote speakers discussing topics such as DevSecOps, cloud security, risk management, and more. Pre-conference and post-conference workshops will be offered on topics including mainframe security, red team/blue team techniques, incident response, and malware analysis.
This document discusses point-of-sale (POS) malware and credit card transaction security. It begins by explaining how POS terminals and the credit card transaction ecosystem work. It then introduces POS malware, noting how early breaches captured card data during transmission but modern malware extracts it from RAM. The document outlines the evolution of POS malware from 2011-2015 and common infection methods. It provides a case study on the BlackPOS malware and discusses new technologies like EMV chips, NFC payments, and their impacts on security.
John 15:12 Ministries is an all-volunteer organization that provides outreach to homeless individuals in the Cincinnati area. It delivers necessities like food, water, and clothing and aims to develop trusting relationships and show God's unconditional love. The ministry was started over 10 years ago by a man who wanted to continue helping his homeless friends after getting his own apartment. Volunteers now provide a continuum of care and help those wanting to get off the streets to access shelters, rehabilitation programs, and housing while educating the public about homelessness.
Individual program of hunting on the territory of Russia.
During a year, depend from a season are held the various types of hunting for wild boar from the tower, for moose from a shelter, for Siberian red deer, for grouse on a lek, pheasant, duck with a stool pigeon and woodcock on traction.
Fishing included.
This document summarizes Yodlee's use of Splunk over the past 5 years. It discusses how Yodlee initially started with a small Splunk license in 2010 and has since expanded usage across multiple teams. Splunk is now used for troubleshooting, monitoring production servers and databases, and security monitoring. The document also outlines Yodlee's plans to further expand Splunk usage to additional data sources and servers.
this is the report on Hydrogen Fuel cell. which is the future of vehicles & probably future of electric vehicles.
Hydrogen Fuel cell is the one part or type of fuel cell.
here is the working, advantages, disadvantages of fuel cell vehicles.
as well as there are list of popular fuel cell vehicles recently launched.
23-03-2020
Solar radiation and related terms, measurement of solar radiation, solar energy collectors-flate plate collector, air collector, concentrating collectors, application and advantages of various collectors, solar energy storage system (thermal, chemical, mechanical), solar pond, application of solar energy
Fuel cells convert chemical energy directly into electrical energy and have the potential to provide efficient and environmentally friendly power. There are several types of fuel cells including proton exchange membrane fuel cells (PEMFC), direct methanol fuel cells (DMFC), alkaline fuel cells (AFC), phosphoric acid fuel cells (PAFC), molten-carbonate fuel cells (MCFC), and solid-oxide fuel cells (SOFC). Each type has its own operating characteristics and suitability for different applications. While fuel cells have advantages like high efficiency and low emissions, challenges remain around cost, fuel storage and distribution infrastructure, and operational issues that need further improvement.
This document provides an overview of hydrogen fuel cell vehicles. It begins with an introduction and then covers the history of fuel cells dating back to 1839. It also discusses hydrogen as a fuel, explaining that hydrogen can be extracted from various sources and used as a clean fuel. The document outlines various hydrogen storage technologies as well as the principles and types of fuel cells, including proton exchange membrane, phosphoric acid, solid oxide, and alkaline fuel cells. It addresses hydrogen production methods and concludes by discussing the advantages of fuel cells in reducing emissions.
This document discusses hydrogen fuel cells, including their history, types, and connections to electrochemistry and thermodynamics. It describes how hydrogen fuel cells work through redox reactions, with hydrogen oxidizing at the anode to produce protons and electrons, and oxygen being reduced at the cathode by protons and electrons to produce water. Two main types are alkaline fuel cells, which use an alkaline electrolyte, and proton exchange membrane (PEM) fuel cells, which are more efficient and used in vehicles. Fuel cells can be more efficient than combustion engines and produce only water, making them more environmentally friendly than gasoline-powered vehicles. They may be powered by hydrogen produced through electrolysis using renewable energy.
This document summarizes the history and future of hydrogen as a fuel source and fuel cells. It discusses how fuel cells work by converting the chemical energy in hydrogen into electricity through an electrochemical reaction. Different types of fuel cells are described, including proton exchange membrane, alkaline, phosphoric acid, molten carbonate, and solid oxide fuel cells. Applications for fuel cells include transportation, portable power devices, and stationary power generation. The document concludes that the commercialization of fuel cells is increasing, with projections of millions of fuel cell shipments by the next decade, and opportunities for further innovation in areas like hydrogen generation and storage.
The document summarizes fuel cells and provides details about phosphoric acid fuel cells (PAFC). It states that fuel cells directly convert the chemical energy of a fuel into electricity through an electrochemical reaction with oxygen without combustion. PAFC were an early commercial type of fuel cell that uses phosphoric acid as an electrolyte and operates at 150-200°C. The document describes the basic components and chemical reactions of PAFC and compares them to polymer electrolyte membrane fuel cells.
The document summarizes key information about fuel cells. It describes that fuel cells directly convert the chemical energy of a fuel, like hydrogen, into electrical energy through electrochemical reactions. It compares the process of fuel cells to ordinary combustion, noting that fuel cells produce electricity and water as products rather than heat. The document then provides details about the components and basic operations of fuel cells, focusing on two commercially important types: phosphoric acid fuel cells and polymer electrolyte membrane fuel cells.
Fuel cells convert chemical energy directly into electrical energy through electrochemical reactions. They consist of an anode, cathode, and electrolyte. In the process, hydrogen atoms are split into protons and electrons at the anode; protons pass through the electrolyte while electrons flow through an external circuit, generating electricity. At the cathode, protons and electrons combine with oxygen to form water. Fuel cells are more efficient and less polluting than combustion engines. Two major types are phosphoric acid fuel cells (PAFC) and polymer electrolyte membrane fuel cells (PEMFC), which differ in their electrolytes, operating temperatures, and applications. Fuel cells are used to power vehicles, buildings, and portable devices.
A fuel cell converts chemical energy from hydrogen into electricity through an electrochemical reaction with oxygen. It requires a continuous fuel source unlike batteries. There are different types of fuel cells defined by their electrolyte. A fuel cell has an anode, cathode, electrolyte and catalyst. Protons pass through the electrolyte but not electrons, which provide the current. Fuel cells produce electricity and water as byproducts. Problems include hydrogen storage and distribution limitations which can be addressed using fuel reformers.
This document discusses direct energy conversion through photovoltaic cells and fuel cells. It provides details on:
1) How photovoltaic cells convert solar energy into electrical energy through a module of approximately 30 cells producing around 15V and 1.5A of current. Applications include water pumping, commercial and residential power, and consumer electronics.
2) What fuel cells are, how they convert hydrogen and oxygen into water and electricity through electrochemical reactions. Types are classified by temperature and electrolyte used, with hydrogen-oxygen and fossil fuel cells discussed in detail.
3) Advantages of fuel cells include high efficiency and low emissions, while disadvantages include higher costs and difficulties with hydrogen production and storage.
Direct energy conversion (PV Cell, Fuel Cell)Ashish Bandewar
Direct Energy Conversion :- Photo voltage cells: Principle, concept of energy conversion, conversion efficiency, power output and performance, storage, Fuel Cells : Principles types of fuel cells, conversion efficiency
The document discusses hydrogen fuel cells, including their history, working principles, types, and applications. It provides the following key points:
- Hydrogen fuel cells were discovered in 1838 and work by combining hydrogen and oxygen to efficiently produce electricity and water. This is done through an electrochemical process without combustion.
- There are several types of fuel cells including proton exchange membrane, phosphoric acid, solid oxide, and alkaline fuel cells, which differ in their electrolyte and operating temperatures.
- Fuel cells have many potential applications from transportation to backup power and are more efficient than combustion engines. They produce only water and heat as byproducts, making them a cleaner alternative to fossil fuels.
This document discusses fuel cells, which are electrochemical devices that directly convert chemical energy from a fuel into electricity without combustion. It describes the basic components and principles of operation for various types of fuel cells, including proton exchange membrane fuel cells (PEMFC), phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), solid oxide fuel cells (SOFC), and others. The document also covers advantages such as high efficiency and lack of emissions, as well as challenges like high costs and low service life. Applications discussed include vehicles, submarines, portable power, and spacecraft.
A fuel cell is an energy conversion device that directly converts the chemical energy of a fuel into electricity. It has porous electrodes (anode and cathode) sandwiching a solid electrolyte. At the anode, the fuel reacts to produce electrons and ions. The ions travel through the electrolyte while the electrons flow through an external circuit, powering devices. At the cathode, oxygen reacts with the ions and electrons to form water. Fuel cells produce a small voltage, so multiple cells are stacked to increase voltage. High-temperature fuel cells like solid oxide (SOFC) and molten carbonate (MCFC) fuel cells can use fuels other than hydrogen due to internal reforming, and their waste heat can be
The document discusses hydrogen fuel cell technology and its potential to contribute to energy independence. It provides an overview of what fuel cells are and how they work. Some key points include that fuel cells produce electricity through an electrochemical reaction without combustion, and are more efficient than fuel burning. It also discusses the types of fuel cells, challenges to adoption like cost and storage, and benefits like efficiency, reliability and reduced emissions. Lastly, it covers laws and incentives supporting hydrogen fuel cell development.
This document discusses hydrogen as an alternative fuel source. It describes three types of hydrogen - grey, blue, and green - based on their production method. It also outlines four key methods for producing hydrogen: natural gas reforming, electrolysis, gasification, and fermentation. The document then explains how hydrogen fuel cells work as an energy conversion device before concluding with some drawbacks to hydrogen as a fuel, such as lack of infrastructure and safety concerns due to its combustible nature.
The document discusses the history and workings of hydrogen fuel cells. It provides details on:
- The basic components and electrochemical process of how hydrogen fuel cells generate electricity from hydrogen and oxygen.
- The different types of fuel cells, including proton exchange membrane, phosphoric acid, solid oxide, and alkaline fuel cells.
- The importance of hydrogen fuel cells as a clean, efficient means of energy production and potential applications in transportation, power generation, and other sectors.
- Methods of hydrogen production including thermal, electrolysis, and photolytic processes and the goal of developing renewable hydrogen production.
This document summarizes the performance analysis and enhancement of a microcontroller-based photovoltaic (PV) pumping system. It describes the system components, including the PV cell, power modulator, driving motor, centrifugal pump. It provides the mathematical models of the PV cell and centrifugal pump. It then outlines the study, including modeling a DC motor-based PV pumping system and a single-phase induction motor-based system, experimental work, and feasibility study conclusions.
The document proposes a load shedding mechanism for intentional islanding of distribution systems with distributed generation. It describes intentional and unintentional islanding, presents a case study on the IEEE 33-bus system with seven distributed generators, and develops an algorithm for load shedding to balance generation and demand in isolated islands. Simulation results show the proposed mechanism can maintain stable frequency and voltage during different islanding scenarios by selectively disconnecting non-critical loads.
The document discusses the Newton-Raphson method for finding the solutions of nonlinear equations. It describes how the method uses Taylor series expansion to linearize the function around an initial guess. It then finds the next estimate as the initial guess minus the ratio of the function value to the derivative value. The method repeats this process iteratively until converging to a solution. Examples of applying Newton-Raphson to power flow problems are presented.
Gauss-Seidel is an iterative technique used to solve nonlinear equations. Power flow analysis is important for planning, economics, scheduling, and control of electric power systems to determine bus voltages, active and reactive line flows. It models different bus types including a slack bus, load buses, and generator buses. The total number of equations equals the number of P-Q and P-V buses to solve for bus voltages and line flows.
This document discusses various types of FACTS (Flexible AC Transmission System) devices used to control power flow in transmission lines. It describes shunt FACTS devices like static VAR compensators (SVC) and static synchronous compensators (STATCOM) which can generate or absorb reactive power. It also discusses series FACTS devices like thyristor-controlled series capacitors (TCSC) and static synchronous series compensators (SSSC) which can control active power flow by varying the line impedance. TCSC is highlighted as being more economical than other series FACTS technologies and can provide benefits like damping power oscillations, improving stability and controlling power flow.
This document outlines the key elements needed for a competitive electricity market, including:
1) Separating generation, transmission, and distribution with competition in generation;
2) Ensuring open access to the transmission system and power pool for coordination/dispatch;
3) The power pool providing essential services like backup power and reserves;
4) Opportunity cost pricing through the power pool; and
5) Potentially extending competition to retail customers if distribution wires are regulated.
This document summarizes an optimal power flow analysis, which aims to optimize power system operating conditions subject to constraints. It discusses:
- The objective is to minimize total generation costs by optimizing control variables like generator real/reactive power outputs.
- The optimization is subject to constraints like power flow equations, generator/load balances, voltage and branch flow limits.
- Common objectives include fuel cost minimization, active power loss minimization, and reactive power planning to minimize costs.
- The fuel cost minimization objective function expresses the total generation cost as a function of generator real power outputs, with the goal of minimizing this cost subject to the network constraints.
The document discusses optimization techniques, including genetic algorithms and particle swarm optimization. It provides definitions and classifications of optimization problems and algorithms. Specifically, it describes the implementation of genetic algorithms as follows:
1. Genetic algorithms initialize a random population of solutions and evaluate them to determine fitness.
2. Operators like selection, crossover and mutation are then applied to produce new potential solutions. Selection chooses the fittest for reproduction, crossover combines solutions, and mutation introduces random changes.
3. The process repeats, selecting and breeding new solutions, until a termination condition is met like reaching a maximum number of generations.
1. Unit commitment involves determining the optimal mix of generators to meet expected demand while satisfying operational constraints like minimum up and down times. It aims to minimize total costs which include start-up costs and variable running costs.
2. The example problem determines the lowest cost combination of 3 generators to produce 550MW of power. Various constraints like minimum generation levels and ramp rates must be considered.
3. Key constraints in unit commitment include minimum and maximum generation limits, minimum up and down times, and ramp rates for changing output. System constraints require matching generation to load while maintaining sufficient operating reserves. Environmental and network limits also factor into the optimization.
The document discusses optimal power flow analysis which is power flow analysis with an optimization objective such as minimizing fuel costs or transmission losses. It describes power flow analysis as determining the voltage magnitude and angle for each bus given load and generator conditions. Optimal power flow aims to satisfy nonlinear equality constraints from load flow equations and inequality constraints while optimizing an objective function such as fuel costs. Common solution methods include gradient, Newton-based, and linear programming approaches as well as intelligent methods like artificial neural networks.
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...University of Maribor
Slides from talk presenting:
Aleš Zamuda: Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapter and Networking.
Presentation at IcETRAN 2024 session:
"Inter-Society Networking Panel GRSS/MTT-S/CIS
Panel Session: Promoting Connection and Cooperation"
IEEE Slovenia GRSS
IEEE Serbia and Montenegro MTT-S
IEEE Slovenia CIS
11TH INTERNATIONAL CONFERENCE ON ELECTRICAL, ELECTRONIC AND COMPUTING ENGINEERING
3-6 June 2024, Niš, Serbia
Batteries -Introduction – Types of Batteries – discharging and charging of battery - characteristics of battery –battery rating- various tests on battery- – Primary battery: silver button cell- Secondary battery :Ni-Cd battery-modern battery: lithium ion battery-maintenance of batteries-choices of batteries for electric vehicle applications.
Fuel Cells: Introduction- importance and classification of fuel cells - description, principle, components, applications of fuel cells: H2-O2 fuel cell, alkaline fuel cell, molten carbonate fuel cell and direct methanol fuel cells.
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024Sinan KOZAK
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
Literature Review Basics and Understanding Reference Management.pptxDr Ramhari Poudyal
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
Comparative analysis between traditional aquaponics and reconstructed aquapon...bijceesjournal
The aquaponic system of planting is a method that does not require soil usage. It is a method that only needs water, fish, lava rocks (a substitute for soil), and plants. Aquaponic systems are sustainable and environmentally friendly. Its use not only helps to plant in small spaces but also helps reduce artificial chemical use and minimizes excess water use, as aquaponics consumes 90% less water than soil-based gardening. The study applied a descriptive and experimental design to assess and compare conventional and reconstructed aquaponic methods for reproducing tomatoes. The researchers created an observation checklist to determine the significant factors of the study. The study aims to determine the significant difference between traditional aquaponics and reconstructed aquaponics systems propagating tomatoes in terms of height, weight, girth, and number of fruits. The reconstructed aquaponics system’s higher growth yield results in a much more nourished crop than the traditional aquaponics system. It is superior in its number of fruits, height, weight, and girth measurement. Moreover, the reconstructed aquaponics system is proven to eliminate all the hindrances present in the traditional aquaponics system, which are overcrowding of fish, algae growth, pest problems, contaminated water, and dead fish.
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECTjpsjournal1
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
A review on techniques and modelling methodologies used for checking electrom...nooriasukmaningtyas
The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
4. Agenda
• Introduction
• History
• Theory of Operation
• Hydrogen
– Production
– storage
• Fuel cells electrical characteristics
• Fuel cell types
• Fuel cell- advantage and disadvantage
• Fuel cell application
• Future of fuel cell
• Case study
4
5. Introduction
• Cars and Trucks using petroleum fuels are
one of the leading causes of air pollution.
• Air pollution is single handedly
responsible for up to 30,000 premature
deaths each year.
• Global warming due to continuous
increase in temperature.
• Getting hard to fulfill the increasing fuel
requirements.
• Acid rain which is harmful for humans and
plants equally.
5
6. History
• 1839, the first fuel cell created by sir William Grone called “The Gas Battery”
• 1932, Francis Bacon Makes the first functional fuel cell
• 1950, General Electric creates the PEM fuel cell
• 1960, First commercial use by NASA space Programs to generate power
• 1966, General motors developed the First fuel cell road vehicle “Chevrolet
Electrovan”
• 1980, United States navy starts to equip submarines with fuel cell.
• 1990, Stationary fuel cell are used to power building.
• 2005, Fuel cell start becoming available to the public.
6
8. Fuel cells - Description
oxygen
electricity
heat
Fuel cell water
hydrogen
• colorless, odorless
and tasteless gas
• chemically active
and rarely exists in
nature in its pure
form
8
9. Hydrogen - production
• Steam reforming
• Electrolyzing
– Liquid
– Steam
• Thermal
• Thermochemical
• reacting steam with petroleum
hydrocarbons
• These reactions occur at temperatures
of 200°C or higher
• Liquid
• charging the water with an
electrical
• Adding electrolyte as salt to
increase conductivity
• Steam
• Like liquid but more heat is added
rather than electricity
• At 2500°C water decomposes into
hydrogen and oxygen
• To prevent recombine we use 3000°C
• This heat can be providing by solar
energy
• chemicals such as bromine or iodine is
used
9
10. Hydrogen – Storage – liquid storage
Liquid Storage
• Cooling below boiling point -252.7°C allows
storage as liquid without the need for
pressurization.
• takes up 1/700 of gas volume enabling to
stored and transported much more.
• Slush -liquid and solid- produced by subjecting
the liquid to the vacuum enabling to store
more
• difficult and expensive process
• consumes the equivalent of 25-30% of its
energy content.
• To cool 1 kg of hydrogen 11.1 kWh of electrical
energy is required.
• Liquid Storage
• Gas Storage
• Metal Hydrides
• Gas on Solid Adsorption
• Microspheres
10
11. Hydrogen – Storage – Gas storage
gas Storage
• less energy than converting to liquid form.
• pressurized to store any appreciable amount.
• pressurized hydrogen could be stored in
caverns, gas-fields and mines.
• Highly expensive tank can be fabricated with
New materials such as carbon fiber.
• Not economically for transportation.
• Liquid Storage
•Gas Storage
• Metal Hydrides
• Gas on Solid Adsorption
• Microspheres
11
12. Hydrogen – Storage – Metal Hydrides
Metal Hydrides
• chemical compounds of hydrogen and other
material such as magnesium, nickel, copper,
iron and titanium.
• metal alloys absorb hydrogen and release it
when heated
• higher densities than by simple compression..
• Liquid Storage
• Gas Storage
•Metal Hydrides
• Gas on Solid Adsorption
• Microspheres
12
13. Hydrogen – Storage – Gas on Solid Adsorption
Gas on Solid Adsorption
• Hydrogen can be stored by Adsorption on
activated charcoal (carbon)
• Approach the storage density of liquid
hydrogen.
• Liquid Storage
• Gas Storage
• Metal Hydrides
•Gas on Solid Adsorption
• Microspheres the adhesion of atoms, ions, or molecules from a gas,
liquid, or dissolved solid to a surface.
13
14. Hydrogen – Storage – Microspheres
Microspheres
• Very small glass spheres hold hydrogen at high
pressures.
• Steps
1. charged with gas at high temperatures where
the gas can pass through the glass wall
2. At low temperature the glass is impervious to
hydrogen and it is locked in.
• Liquid Storage
• Gas Storage
• Metal Hydrides
• Gas on Solid Adsorption
•Microspheres
14
16. Fuel cell stack - type
• Alkaline Fuel Cell –AFC -
– A liquid potassium hydroxide is used in AFC as an electrolyte
• Phosphoric Acid Fuel Cell – PAFC -
– liquid phosphoric acid as an electrolyte
• Molten Carbonate Fuel Cell –MCFC-
– composed of a molten carbonate salt mixture suspended in a porous,
chemically inert ceramic matrix of beta-alumina solid electrolyte (BASE).
• Solid Oxide Fuel Cell –SOFC-
– dense layer of ceramic that conducts oxygen ions
• Proton Exchange Membrane Fuel Cell – PEMFC-
– solid polymer membrane - platinum catalyst – used as an electronic
insulator
16
17. Fuel cell - Alkaline Fuel Cell –AFC -
• Used in NASA in 60’s
• Anode: pure hydrogen
• cathode: pure oxygen
• Electrolyte: liquid potassium
hydroxide
• Temperature: (80-100°C) gives a
fast-start
• efficiency: (50-60%)
17
18. Fuel cell - Phosphoric Acid Fuel Cell– PAFC -
• electrolyte is solid
• Anode: Hydrogen – Methane
• cathode: oxygen; air
• Electrolyte: pure liquid phosphoric acid
• Temperature: (160-200°C)
• efficiency: (40%) up to (70%) if
produced steam is used
18
19. Fuel cell-Molten Carbonate Fuel Cell –MCFC-
• power production: is in the 0.3-3
MW range
• Anode: Hydrogen – Methane – coal gas
• cathode: oxygen; air
• Electrolyte: Melton carbonite
• Temperature: (650°C) high
temperature operation
• efficiency: (45-65%)
19
20. Fuel cell- Proton Exchange Membrane Fuel Cell – PEMFC-
• power production: is in the 0.3-3
MW range
• Anode: Hydrogen – Methane – coal gas
• cathode: oxygen; air
• Electrolyte: solid polymer membrane
• Temperature: (50 to 100°C)
• efficiency: (50-70%)
20
21. Fuel cell- Solid Oxide Fuel Cell – SOFC-
• Anode: Hydrogen – Methane – coal gas
• Cathode: oxygen; air
• Electrolyte: dense layer of ceramic
that conducts oxygen ions
• Temperature: (up to 1000°C)
• Efficiency: (50-70%)
21
22. fuel cell type Typical Stack Applications Advantage Disadvantage
Polymer
Electrolyte
Membrane (PEM)
1 kW-100 kW Backup power
Portable power
Distributed generation
Transportation
Specialty vehicles
Solid electrolyte reduces corrosion
& electrolyte management problems
Low temperature
Quick start-up
Expensive catalysts impurities
waste heat
Sensitive to fuel
Low temperature
Alkaline (AFC) 10-100 kW Military
Space
Cathode reaction faster in alkaline
electrolyte, leads to high performance
Low cost components
fuel and air management
Phosphoric Acid
(PAFC)
400 kW - 100
kW module
Distributed generation Higher temperature enables CHP
Increased tolerance to fuel impurities
Pt catalyst
Low current and power
Long start up time
Molten
Carbonate
(MCFC)
300 kW-3
MW
Electric utility
Distributed generation
High efficiency
Fuel flexibility
Can use a variety of catalysts
Suitable for CHP
High temperature cause
corrosion and breakdown of
cell components
Long start up time
Low power density
Solid Oxide
(SOFC)
1 kW-2 MW Auxiliary power
Electric utility
Distributed
generation
High efficiency
Fuel flexibility
Can use a variety of catalysts
Solid electrolyte
Suitable for CHP & CHHP
Hybrid/GT cycle
High temperature corrosion and
breakdown of cell component
High temperature long starts up
time
and limits operation requires
22
26. Fuel cells characteristics
𝑅 𝛺, 𝑅 𝐻2
, 𝑅 𝑂2
..the internal
resistance, anode reaction and
cathode reaction respectively
• region 1 the sharp drop in the
voltage is caused by the chemical
reaction
• region 2 the voltage drop is caused
by the losses in the electrode
structure and the electrolyte, which is
almost constant
• region 3 the voltage drop is defined
by the rate of reaction diffusion
• the current reaches a maximum value
called the limiting current
26
27. • 40% efficiency converting methanol to hydrogen in reformer
• 80% of hydrogen energy content converted to electrical energy
• 80% efficiency for inverter/motor
– Converts electrical to mechanical energy
• Overall efficiency of 24-32%
Fuel cell- System over all Efficiency
27
28. 28
Technology System Efficiency
Fuel Cell 28%
Electric Battery 26%
Gasoline Engine 20%
Fuel cell- Efficiency Comparison
0%
5%
10%
15%
20%
25%
30%
System Efficiency
29. Fuel cell- Advantage
• Zero Emissions: a fuel cell vehicle only emits water vapor. Therefore, no air
pollution occurs
• High efficiency: Fuel cells convert chemical energy directly into
electricity without the combustion process. As a result, Fuel cells can achieve
high efficiencies in energy conversion
• High power density: A high power density allows fuel cells to be
relatively compact source of electric power, beneficial in application with space
constraints
• Quiet operation: Fuel cells can be used in residential or built-up areas
where the noise pollution can be avoided
• No recharge: Fuel cell systems do not require recharging
• Discharge: Water is the only discharge (pure H2)
29
30. • Storage: It is difficult to manufacture and stores a high pure hydrogen
• Expensive: It is very expensive as compared to battery
• Discharge: CO2 discharged with methanol reform
• Technology: currently expensive
• Many design: issues still in progress
• Dirty energy: Hydrogen often created using “dirty” energy (e.g., coal)
• Difficult to handle: Pure hydrogen is difficult to handle
Fuel cell- Disadvantage
30
32. • Units that produce propulsive power or range extension
to a vehicle
• Technologies used are PEMFC and DMFC.
• Ranges from 1KW to 100KW.
• The Fuel Cell Electric Vehicles (FCEV) such as trucks and
buses sector is showing year-on-year growth.
• Successful deployments have taken place in Europe,
Japan, Canada and the USA
Fuel cell- Applications - Transport
32
33. • Forklift trucks and other goods handling vehicles
such as airport baggage trucks, etc.
• Light duty vehicles (LDVs), such as cars and vans
• Buses and trucks
• Submarines, Ferries and smaller boat
Fuel cell- Applications - Transport
33
35. Fuel cell- Applications - Transport
Ford Focus FCV
Honda Fuel Cell
Vehicles-2003Ford H2RV
35
36. • A 30 ft. Hydrogen Fuel
cell powered transit bus
made by Ballard Power
Systems in Canada.
• It has a 275 horsepower
engine, and a range of
250 miles before requiring
refueling.
• The only emission from
this bus is warm, moist
air.
Fuel cell- Applications - Transport
36
37. • Advantage of virtually silent
operation, Fuel cells are
especially suited for silent
operations because of their low
heat and noise signatures
• Air-independent systems
increase underwater endurance
• Used German Navy, Greek Navy,
South, Korean Navy and Italian
Navy, US Navy has no
operational fuel cell powered
subs but is actively engaged in
research
Fuel cell- Applications - Transport
37
38. • Portable fuel cells are those which are built
into, or charge up, products that are
designed to be moved (They can be used in
Backup power)
• These include military applications, auxiliary
power units, personal electronics, portable
products
• Ranges from 5W up to 20KW.
• Technologies used are PEMFC and DMFC.
• Rapid recharging, Convenience, reliability,
low operating, significant weight reduction
potential (for soldier-borne military power)
and longer run-times compared with
batteries
Fuel cell- Applications - Portable
38
39. • Unmanned Aerial Vehicles
• Decreased costs over battery systems.
• Department of Defense and United
States Air Force are funding UAV
projects
• In 2009 over $3.5 million dollars have
been awarded in contracts to
companies
• working on miniaturizing fuel cells for
UAVs
Fuel cell- Applications - Portable
39
40. • Soldier Portable Power
• -Soldiers are carrying more and more
energy (30-50) Watts - (more than 50
pounds) using more than 20 different type
of batteries.
• - Fuel cells can be used to re-charge
batteries in the field, as well as act as
generators.
• -As an example M-25 Modular Fuel Cell
Power System used in Land Warrior 72
Hour Mission
Fuel cell- Applications - Portable
40
41. • Stationary fuel cells are units which provide
electricity but are not designed to be
moved
• Power ranges from 0.5KW to 1MW
• Technologies used are PEMFC, PAFC, MCFC
and SOFC
• These include combined heat and power
(CHP), uninterruptible power systems (UPS)
and primary power units
• Residential CHP units have been deployed
extensively in Japan with more than 10,000
cumulative units by the end of 2010 and
South Korea has also deployed CHP units
for residential use
Fuel cell- Applications - Stationary
41
42. Future
2015 – 2025- Substantial markets for
hydrogen-powered vehicles likely to
start developing
2020: 5 to 10 million hydrogen-powered cars
2030: 50 million hydrogen powered cars
2040: 150 million hydrogen-powered cars
42
43. Case study
• Paper named Optimal Design of a PV/Fuel Cell Hybrid Power
System for the City of Brest in France, performed by Omar Hazem
Mohammed, Yassine Amirat, Mohamed Benbouzid,University of
Brest
• Cited by IEEE Publications, 2015,IEEE15th International Conference
• focused on economical performances and is mainly based on the
loss of the power supply probability concept.
• The hybrid power system optimal design is based on a simulation
model developed using HOMER, the site of software
http://www.homerenergy.com/
• a practical load demand profile of Brest city is used with real data
43
44. Case study SYSTEM DESCRIPTION
where the hybrid power
system consists
1.PV generators
2.fuel cells
3.Electrolyzer
4.hydrogen tank,
44
45. Case study SYSTEM DESCRIPTION
The city of Brest load demand
• should be noted that the 2MW
annual peak load occurs in
January
• The largest demand occurs
during the peak season
(between December and
January)
• The lowest demand happens
during the low season (between
July and September)
45
46. Case study SYSTEM DESCRIPTION
• solar radiation data
were obtained from
the NASA
Atmospheric Data
Center
• The annual average
solar radiation for
this area is about
3.39 kWh/m²/day
Monthly average daily solar radiation
46
47. Case study HOMER inputs and system configuration
INPUT DATA ON OPTION COSTS
INPUT DATA ON OPTION SIZING AND OTHER PARAMETERS
47
48. • The model constraints include:
– Maximum annual capacity shortage is 0%
– Operating reserve is considered to be 10% of the hourly load
• The operational control strategy (power management)
– In normal operation, the PV generator supplies the load demand the power
excess will be used to feed the electrolyzer for hydrogen production and
storage in the tank
– If the PV generator power is less than the load demand, FCs will generate
the remaining power to supply the load demand. FCs should fully supply the
load demand in case of no radiation
Case study constraint and strategy
48
49. • simulation is carrying-out
several with a 3.39
kWh/m²/day solar
radiation
• and considering different
PV, FC, electrolyzer,
hydrogen tank, and
converter capacities
Case study optimization results
49