Stirling engine
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The document summarizes the Stirling engine, a heat engine that converts heat into mechanical work. It discusses the types of Stirling engines including the alpha, beta, and gamma. The key components are described as the regenerator, power piston, displacer, crankshaft, and flywheel. Applications include electricity generation, heating and cooling, and marine propulsion. Advantages are high efficiency and ability to use various heat sources, while disadvantages include high initial costs and inability to instantly change power output. In conclusion, Stirling engines offer applications but are expensive to build and rarely used commercially for power generation.
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STIRLING ENGINE
The document discusses the history and applications of Stirling engines. It describes how Robert Stirling invented the Stirling engine in 1816 as a safer alternative to steam engines. It then discusses the different types of Stirling engine configurations (alpha, beta, gamma) and how they operate through thermodynamic cycles with regenerators. Some key reasons for using Stirling engines are their ability to run on various fuels with low emissions, high efficiency, ability to run quietly and for long periods. Economically, Stirling engines can reduce costs over time due to their ability to harness renewable energy sources like solar power and their high efficiencies. The document concludes by examining applications of Stirling engines like in vehicles, distributed power generation, and solar thermal
Stirling engines
The document provides an overview of the Stirling engine, including its history, working principle, components, configurations, efficiency, applications and advantages/disadvantages. It was invented in 1816 by Robert Stirling as a safer alternative to steam engines. The Stirling engine works on a closed regenerative thermodynamic cycle to convert heat into mechanical work using a fixed quantity of working fluid. Its components include a working gas, displacer/power pistons, heat exchangers and a regenerator. Common configurations are the alpha, beta and gamma types. Applications include power generation, cooling and pumping. Advantages are high efficiency and fuel flexibility, while disadvantages include cost and sealing challenges.
Stirling Engine
The document discusses the Stirling engine, an external combustion engine invented in 1816 by Robert Stirling as a safer alternative to steam engines. It works by alternately compressing and expanding a gas with temperature differences created between the hot and cold sections. Key advantages are its ability to run on various heat sources, its safety compared to steam, and lower environmental impact. Applications include power generation, heating, cooling, and more. The document outlines the history, components, working principles, types, advantages, applications and conclusion of the Stirling engine as a sustainable technology.
Stirling Engine
A Stirling engine is a heat engine that operates by cyclic compression and expansion of air or other gas (the working fluid) at different temperatures, such that there is a net conversion of heat energy to mechanical work. More specifically, a closed-cycle regenerative heat engine with a permanently gaseous working fluid.
Seminar report on stirling engine
This document is a seminar report submitted by Shivam Kushwah in partial fulfillment of the requirements for a Bachelor of Technology degree in Mechanical Engineering from Rajasthan Technical University, Kota. The report focuses on Stirling engines and provides an introduction to Stirling engines, a brief history, reasons for their design, and applications for power generation. It includes sections on the theoretical background of Stirling engines and discusses components, configurations, the Carnot cycle, and the Stirling cycle.
Stirling engine
The document summarizes the history, working principle, configurations, types, Stirling cycle, advantages, disadvantages, and applications of the Stirling engine. It was invented in 1816 by Robert Stirling as an alternative to steam engines to avoid explosions. It operates outside combustion and uses the temperature difference between a hot and cold side to push and pull a piston. Common configurations include alpha, beta, and gamma types. Advantages include high efficiency, diverse heat sources, low emissions, and maintenance-free operation. Disadvantages include cost and sealing issues. Practical applications include waste heat recovery, solar power, and marine engines.
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stirling cycle
The Stirling engine is a heat engine that uses an external heat source and a sealed working gas to generate power without combustion or exhaust. It has two pistons that create a 90-degree phase angle and uses the Stirling cycle rather than the cycles of internal combustion engines. There are two main types - one with two pistons and one with a displacer piston. Key advantages are that it can run on various fuels, is non-polluting since the gas never leaves the engine, and is quieter than other engines.
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The document provides an overview of the Stirling engine, including its history, working principle, components, configurations, efficiency, applications and advantages/disadvantages. It was invented in 1816 by Robert Stirling as a safer alternative to steam engines. The Stirling engine works on a closed regenerative thermodynamic cycle to convert heat into mechanical work using a fixed quantity of working fluid. Its components include a working gas, displacer/power pistons, heat exchangers and a regenerator. Common configurations are the alpha, beta and gamma types. Applications include power generation, cooling and pumping. Advantages are high efficiency and fuel flexibility, while disadvantages include cost and sealing challenges.
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Stirling Engine
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This document is a seminar report submitted by Shivam Kushwah in partial fulfillment of the requirements for a Bachelor of Technology degree in Mechanical Engineering from Rajasthan Technical University, Kota. The report focuses on Stirling engines and provides an introduction to Stirling engines, a brief history, reasons for their design, and applications for power generation. It includes sections on the theoretical background of Stirling engines and discusses components, configurations, the Carnot cycle, and the Stirling cycle.
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The document summarizes the history, working principle, configurations, types, Stirling cycle, advantages, disadvantages, and applications of the Stirling engine. It was invented in 1816 by Robert Stirling as an alternative to steam engines to avoid explosions. It operates outside combustion and uses the temperature difference between a hot and cold side to push and pull a piston. Common configurations include alpha, beta, and gamma types. Advantages include high efficiency, diverse heat sources, low emissions, and maintenance-free operation. Disadvantages include cost and sealing issues. Practical applications include waste heat recovery, solar power, and marine engines.
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This document provides information about cylinder heads for internal combustion engines. It discusses the functions of cylinder heads, which include sealing the top of the cylinders, forming the combustion chamber, and carrying injectors and valves. It describes different cylinder head designs like overhead camshaft heads, hemispherical heads, and cross-flow heads. It also covers topics like valve guides, valve stem clearances, cylinder head materials, cooling passages, resurfacing, and new technical developments that aim to further reduce weight and increase power density of engines.
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- Comparisons of Stirling engines to Carnot engines and internal combustion engines in terms of efficiency and practical issues.
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The Stirling engine was invented in 1816 by Robert Stirling as a safer alternative to steam engines. It works by alternately compressing and expanding a fixed amount of working fluid between a hot and cold section, driving a piston for power generation. Key components include pistons and a displacer. Advantages over steam engines include operating at lower pressures safely using various heat sources. Applications include power generation, pumps, refrigeration, and as an alternative power source for vehicles, ships and nuclear plants. Stirling engines are more efficient than steam and can use solar, waste or other heat sources to run.
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The document provides information about the Stirling engine, including:
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2) It was invented in 1816 by Robert Stirling but saw limited use until the 20th century when Philips revived interest in it for portable generators.
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This presentation is regarding 'Energy Conservation', presented to our respected teacher Prof. Dr. Moinuddin Ghauri.
It is a small scale design of a heat recovery system made on gensets installed in CIIT Lahore Campus. This shows how heat lost to the environment can be saved. Although the quamtum of heat on a 50 kVA genset may not be significant, but it is a demo of bigger installations which, if installed in an industry with its own power generation system, can give huge monetary benefits.
Thermoelectric Generators for Automotive Use
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Diesel generating plants always have an important role in power plants as well as in industries and commercial installations to meet continuous and emergency standby power requirements for day to day use. A good knowledge of basic operation principles, layout requirements, associated components and maintenance practices for diesel power plants help the career development of many engineers and technicians in today’s world. Whatever your role in industry - designer, purchase engineer, installation contractor or maintenance engineer, a solid knowledge of diesel power plants is always useful. This workshop is designed to familiarise you with various aspects of diesel generating power plants for practical application.
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MORE INFORMATION: http://www.idc-online.com/content/operation-and-maintenance-diesel-power-generating-plants-28
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A SYSTEMATIC RISK ASSESSMENT APPROACH FOR SECURING THE SMART IRRIGATION SYSTEMS
The smart irrigation system represents an innovative approach to optimize water usage in agricultural and landscaping practices. The integration of cutting-edge technologies, including sensors, actuators, and data analysis, empowers this system to provide accurate monitoring and control of irrigation processes by leveraging real-time environmental conditions. The main objective of a smart irrigation system is to optimize water efficiency, minimize expenses, and foster the adoption of sustainable water management methods. This paper conducts a systematic risk assessment by exploring the key components/assets and their functionalities in the smart irrigation system. The crucial role of sensors in gathering data on soil moisture, weather patterns, and plant well-being is emphasized in this system. These sensors enable intelligent decision-making in irrigation scheduling and water distribution, leading to enhanced water efficiency and sustainable water management practices. Actuators enable automated control of irrigation devices, ensuring precise and targeted water delivery to plants. Additionally, the paper addresses the potential threat and vulnerabilities associated with smart irrigation systems. It discusses limitations of the system, such as power constraints and computational capabilities, and calculates the potential security risks. The paper suggests possible risk treatment methods for effective secure system operation. In conclusion, the paper emphasizes the significant benefits of implementing smart irrigation systems, including improved water conservation, increased crop yield, and reduced environmental impact. Additionally, based on the security analysis conducted, the paper recommends the implementation of countermeasures and security approaches to address vulnerabilities and ensure the integrity and reliability of the system. By incorporating these measures, smart irrigation technology can revolutionize water management practices in agriculture, promoting sustainability, resource efficiency, and safeguarding against potential security threats.
DfMAy 2024 - key insights and contributions
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
Low power architecture of logic gates using adiabatic techniques
The growing significance of portable systems to limit power consumption in ultra-large-scale-integration chips of very high density, has recently led to rapid and inventive progresses in low-power design. The most effective technique is adiabatic logic circuit design in energy-efficient hardware. This paper presents two adiabatic approaches for the design of low power circuits, modified positive feedback adiabatic logic (modified PFAL) and the other is direct current diode based positive feedback adiabatic logic (DC-DB PFAL). Logic gates are the preliminary components in any digital circuit design. By improving the performance of basic gates, one can improvise the whole system performance. In this paper proposed circuit design of the low power architecture of OR/NOR, AND/NAND, and XOR/XNOR gates are presented using the said approaches and their results are analyzed for powerdissipation, delay, power-delay-product and rise time and compared with the other adiabatic techniques along with the conventional complementary metal oxide semiconductor (CMOS) designs reported in the literature. It has been found that the designs with DC-DB PFAL technique outperform with the percentage improvement of 65% for NOR gate and 7% for NAND gate and 34% for XNOR gate over the modified PFAL techniques at 10 MHz respectively.
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Stirling engine
- 1. STIRLING ENGINE GUIDED BY: Amijith A M Lecturer Department of Mechanical Engg. PRESENTED BY: SANJITH B S Sememester - 5 Department of Mechanical Engg.
- 2. CONTENTS • Introduction • Types of stirling engine • Components • Working • Alpha Stirling Engine • Beta Stirling Engine • Gamma Stirling Engine • Application • Advantages • Disadvantages • Conclusion • Referances
- 3. Introduction • Stirling engine is a heat engine • Converts heat energy to mechanical work • Developed and patened in 1816 • Inventor : Robert Stirling • Works on any heat source • It is vastly different from IC engines • EC engine • Closed working cycle • Works on temperature difference
- 4. Types of stirling engine The three major types of stirling engine are -: 1. Alpha Stirling Engine 2. Beta Stirling Engine 3. Gamma Stirling Engine
- 5. Components • Regenerator • Power Piston • Displacer • Crank shaft • Flywheel • Heat dissipation Fins
- 6. Working
- 7. Alpha Stirling Engine Cold air Regenerator Heat source Hot air Crank shaft
- 8. Alpha Stirling Engine 4 Strokes -: 1. Expantion 2. Transfer 3. Contraction 4. Transfer
- 9. Beta Stirling Engine Hot end of cylinder Cold end of cylinder Power Piston Displacer piston Fly wheel Cold gas or air Hot gas or air Fins for cooling
- 12. Application • Electric generation • Prime mover • Micro-CHP • Nuclear power plants • Heat pump • Water pump • Cryogenic refrigerators for missile guidance (below 150 K) • Ideal for use in domestic homes (1KW,50Hz) • Submarines (The Gotland-class submarines of the Swedish Navy)
- 13. Advantages • Can use any heat source • More thermal efficient (approx: 40% vs modern engines 20-25%) • Less pollution (also less noise) • Can generate AC power • Simple working priciple • Simple design • Can be a replacement for steam turbines and steam engines • Low power densities
- 14. Disadvantages • Initial capital is high • Change their power output levels slowly • Heavier (and more expensive) • A Stirling engine cannot start instantly
- 15. Conclusion • Have a range of applications • They are often expensive to build • Have rarely been used in commercial power generating systems. • The Stirling engine is the interesting alternative way to commercialize the waste heat. • One of the ways to increase the effectiveness is to find the optimal mechanism to gear the engine pistons and optimize its parameters (dimensions).
- 16. References • www.wikipedia.org/wiki/Stirling_engine • www.sciencedirect.com/topics/engineering/stir ling-engine • www.auto.howstuffworks.com/stirling- engine.htm • www.seminarstopics.com/pollution-less- engine
- 17. Thank you
- 18. Q