The document discusses various topics related to combustion and fuels:
1. It describes different combustion methods for coal such as pulverized fuel firing, fluidized bed combustion, and tangential firing. It also discusses methods to reduce sulfur dioxide emissions from coal such as fluidized bed combustion and flue gas desulfurization.
2. It provides an overview of coal as a fuel source including its formation, global reserves, and applications. It also summarizes the main processes in coal combustion.
3. It discusses air pollutants produced from coal combustion such as carbon dioxide, carbon monoxide, nitrogen oxides, sulfur oxides, particulate matter, and trace metals. It describes control technologies for these poll
what is producer gas?
Typical components of producer gas
Tar classification
Types of Biomass
GENERAL METHOD BIOMASS PRODUCER GAS CLEANING SYSTEM
Classification of mechanical/physical gas cleaning systems.
ADVANCE CLEANNING SYSTEM
how to clean producer gas from the system
what is producer gas?
Typical components of producer gas
Tar classification
Types of Biomass
GENERAL METHOD BIOMASS PRODUCER GAS CLEANING SYSTEM
Classification of mechanical/physical gas cleaning systems.
ADVANCE CLEANNING SYSTEM
how to clean producer gas from the system
Non recovery-heat recovery cokemaking - a review of recent developmentsJorge Madias
This paper is an update of a previous publication in Spanish [1]. One of the current trends in the production of
metallurgical coke is the comeback of non-recovery ovens. This is driven by less interest in byproducts, smaller investment per annual ton, better environmental performance. The development took place particularly in China, India, USA, Brazil, Australia and Colombia [2]. In the USA, one important factor promoting this technology was that EPA declared it as Maximum Achievable Current technology in 1990. This technology arises from the classic beehive ovens which supplied since the XVIII century the coke for the industrial revolution. Those ovens were manually operated, with small heat recovery, just for heating the oven. Now, non-recovery ovens are modern construction, with highly mechanized operation, and automated to a certain degree. Gases generated by the combustion of the volatile matter are sent through downcomers and further burnt to heat the oven bottom and sides; in many cases, mostly when the plant is built within or closed to a steelmaking facility, the hot gas is used for vapor generation and electric power production. Main differences between conventional and non-recovery/heat recovery processes are shown in figure 1. In conventional process, the coal charged receives the heat indirectly through the furnace walls, by combustion of external gas; inside the oven, positive pressure develops. Gas generated in the coking process is sent to the
by-products plant. In non-recovery ovens, coking proceeds from the top through direct heating by the partial
combustion of the volatile matter over the coal bed, and from the bottom by heat coming from full combustion of gases escaping from the oven. In these plants, the offgas is treated and sent to the stack, in many cases after recovering sensible heat to produce vapor and electric power. Installed capacity for these furnaces was esteemed in 2005 in 22 M metric tons per year, probably including
beehive ovens [2]. In table 1, some of the non-recovery coke plants currently operating are listed. Some plants
belong to companies with coal mining as its core business; others are independent coke producers, purchasing coal and selling coke; then there is some joint ventures between coke producers and steelmakers,
and finally, captive coke plants belonging to steel companies.
Cokemaking in an Integrated Steel Works - Technology, Location and Greenhouse...Smithers Apex
- Impact of cokemaking technology on costs and greenhouse gas emissions for different steel works configurations
- Regional implications that drive cokemaking technology selection
- Identifying implementation niches for the available cokemaking technologies
Author:
Ian Cameron, Senior Director - Iron & Steel, HATCH, Canada
India is the world's largest Sponge Iron producer and mostly uses the Coal based process. The down-side of this industry is that it generates significant amounts of solid waste in the form of ESP Flyash and Bag House Filter Dust. Now as this Flyash contains considerable unburned carbon ( 10% and above), it cannot be utilized in cement manufacturing. Likewise the Bag Filter dust contains upto 25% unburned carbon and above 70% ash which again doesn't allow it to be reused viably as a fuel. Meanwhile, reducing the carbon content by the Carbon-burnout method is too expensive and polluting just to convert the wastes into usable Flyash.
As a result most of these wastes go into landfill, where they again contribute to ground and water pollution.
Surprisingly there are technologies which can not only effectively convert these wastes into usable items like recovered fuel and low carbon Flyash, but at the same time clean up the environment and save the companies great expenses. Its is called Carbon-Ash Separation and there are several ways of doing the same.
Presentation given by Richard T. J. Porter from ETII, University of Leeds, on "CO2QUEST Typical Impurities in Captured CO2 Streams" at the EC FP7 Projects: Leading the way in CCS implementation event, London, 14-15 April 2014
Non recovery-heat recovery cokemaking - a review of recent developmentsJorge Madias
This paper is an update of a previous publication in Spanish [1]. One of the current trends in the production of
metallurgical coke is the comeback of non-recovery ovens. This is driven by less interest in byproducts, smaller investment per annual ton, better environmental performance. The development took place particularly in China, India, USA, Brazil, Australia and Colombia [2]. In the USA, one important factor promoting this technology was that EPA declared it as Maximum Achievable Current technology in 1990. This technology arises from the classic beehive ovens which supplied since the XVIII century the coke for the industrial revolution. Those ovens were manually operated, with small heat recovery, just for heating the oven. Now, non-recovery ovens are modern construction, with highly mechanized operation, and automated to a certain degree. Gases generated by the combustion of the volatile matter are sent through downcomers and further burnt to heat the oven bottom and sides; in many cases, mostly when the plant is built within or closed to a steelmaking facility, the hot gas is used for vapor generation and electric power production. Main differences between conventional and non-recovery/heat recovery processes are shown in figure 1. In conventional process, the coal charged receives the heat indirectly through the furnace walls, by combustion of external gas; inside the oven, positive pressure develops. Gas generated in the coking process is sent to the
by-products plant. In non-recovery ovens, coking proceeds from the top through direct heating by the partial
combustion of the volatile matter over the coal bed, and from the bottom by heat coming from full combustion of gases escaping from the oven. In these plants, the offgas is treated and sent to the stack, in many cases after recovering sensible heat to produce vapor and electric power. Installed capacity for these furnaces was esteemed in 2005 in 22 M metric tons per year, probably including
beehive ovens [2]. In table 1, some of the non-recovery coke plants currently operating are listed. Some plants
belong to companies with coal mining as its core business; others are independent coke producers, purchasing coal and selling coke; then there is some joint ventures between coke producers and steelmakers,
and finally, captive coke plants belonging to steel companies.
Cokemaking in an Integrated Steel Works - Technology, Location and Greenhouse...Smithers Apex
- Impact of cokemaking technology on costs and greenhouse gas emissions for different steel works configurations
- Regional implications that drive cokemaking technology selection
- Identifying implementation niches for the available cokemaking technologies
Author:
Ian Cameron, Senior Director - Iron & Steel, HATCH, Canada
India is the world's largest Sponge Iron producer and mostly uses the Coal based process. The down-side of this industry is that it generates significant amounts of solid waste in the form of ESP Flyash and Bag House Filter Dust. Now as this Flyash contains considerable unburned carbon ( 10% and above), it cannot be utilized in cement manufacturing. Likewise the Bag Filter dust contains upto 25% unburned carbon and above 70% ash which again doesn't allow it to be reused viably as a fuel. Meanwhile, reducing the carbon content by the Carbon-burnout method is too expensive and polluting just to convert the wastes into usable Flyash.
As a result most of these wastes go into landfill, where they again contribute to ground and water pollution.
Surprisingly there are technologies which can not only effectively convert these wastes into usable items like recovered fuel and low carbon Flyash, but at the same time clean up the environment and save the companies great expenses. Its is called Carbon-Ash Separation and there are several ways of doing the same.
Presentation given by Richard T. J. Porter from ETII, University of Leeds, on "CO2QUEST Typical Impurities in Captured CO2 Streams" at the EC FP7 Projects: Leading the way in CCS implementation event, London, 14-15 April 2014
Environmental impact of thermal power plantSiraskarCom
Environmental impact of thermal power plant, Different pollutants from thermal power plants, their effects on human health and vegetation, methods to control pollutants such as particulate matter; oxides of sulphur; oxides of nitrogen, dust handling systems, ESP, scrubbers, water pollution, thermal pollution, noise pollution from TPP and its control
Mercury and other trace metals in the gas from an oxy-combustion demonstratio...Global CCS Institute
To highlight the research and achievements of Australian researchers, the Global CCS Institute together with ANLEC R&D will hold a series of webinars throughout 2017. Each webinar will highlight a specific ANLEC R&D research project and the relevant report found on the Institute’s website. This is the seventh webinar of the series and presented the results of a test program on the retrofitted Callide A power plant in Central Queensland.
The behaviour of trace metals and the related characteristics of the formation of fine particles may have important implications for process options, gas cleaning, environmental risk and resultant cost in oxy-fuel combustion. Environmental and operational risk will be determined by a range of inter-related factors including:
The concentrations of trace metals in the gas produced from the overall process;
Capture efficiencies of the trace species in the various air pollution control devices used in the process; including gas and particulate control devices, and specialised systems for the removal of specific species such as mercury;
Gas quality required to avoid operational issues such as corrosion, and to enable sequestration in a variety of storage media without creating unacceptable environmental risks; the required quality for CO2 transport will be defined by (future and awaited) regulation but may be at the standards currently required of food or beverage grade CO2; and
Speciation of some trace elements
Macquarie University was engaged by the Australian National Low Emissions Coal Research and Development Ltd (ANLEC R&D) to investigate the behaviour of trace elements during oxy-firing and CO2 capture and processing in a test program on the retrofitted Callide A power plant, with capability for both oxy and air-firing. Gaseous and particulate sampling was undertaken in the process exhaust gas stream after fabric filtration at the stack and at various stages of the CO2 compression and purification process. These measurements have provided detailed information on trace components of oxy-fired combustion gases and comparative measurements under air fired conditions. The field trials were supported by laboratory work where combustion took place in a drop tube furnace and modelling of mercury partitioning using the iPOG model.
The results obtained suggest that oxy-firing does not pose significantly higher environmental or operational risks than conventional air-firing. The levels of trace metals in the “purified” CO2 gas stream should not pose operational issues within the CO2 Processing Unit (CPU).
This webinar was presented by Peter Nelson, Professor of Environmental Studies, and Anthony Morrison, Senior Research Fellow, from the Department of Environmental Sciences, Macquarie University.
It describes how the Sulfur is removed from the coal and oil. Desulfurisation of coal and oil is very helpful to bring down the sulfur oxide emissions in the air from the industries and power plants.
Flue gas desulfurization is commonly known as FGD and is the technology used for removing sulfur dioxide (SO2) from the exhaust combustion flue gases of power plants that burn coal or oil to produce steam for the turbines that drive their electricity generators.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
9. • 90% removal capability
• low capital cost—able to
use in existing equipment
• high operating cost
• ability to use different
grades of coal
separator
air
inlet
cleaned
exhaust
grid
Choose a format that's professional
The most effective combustion method
is an atmospheric fluidized bed
10. Percentage Reduction of SO2
coal cleaning
coal switching
fluidized bed
absorption
adsorption
25 50 75
40%
40%
80%
90%
95%
80%
By using these methods, coal utilities
can greatly reduce SO2 emissions
12. Contents
• What is coal? Formation, sources, applications.
• Coal combustion description.
• Coal power plants and air pollution:
Mechanisms and control technologies.
• Coal and air pollution in Israel.
Eshkol power station
Haifa
13. Coal – what is it?
65-95%
C
2-7%
H
<25%
O
<10%
S
1-2%
N
20-70%
Char
5-15%
Ash
2-20%
H2O
20-45%
VM
• Inhomogeneous organic fuel
formed mainly from
decomposed plant matter.
• Over 1200 coals have been
classified.
Time, Temperature
Coal Rank
• Coalification forms different
coal types:
(Peat)
Lignite
Bituminous coal
Anthracite
(Graphite)
Proximate
Analysis
Elemental
Composition
15. Coal Sources
• Coal is the world’s most plentiful fossil fuel.
• Recoverable world coal reserves are estimated at about
1X1012 tons.
32%
29%
12%
8%
7%
7%
5%
United States
Russia
China
Australia
Germany
South Africa
Poland
World Coal Reserves (1989)
16. Coal Applications
• Homes – heat and cooking
• Transportation – steam
engines
• Industry – metal works
• Electricity – power plants
17. Main Processes in Coal
Combustion
coal particle
p-coal, d=30-70m
devolatilization
volatiles
char
homogeneous
combustion
heterogeneous
combustion
CO2, H2O, …
CO2, H2O, …
tchar=1-2sec
tvolatiles=50-100ms
tdevolatile=1-5ms
t
18. The physical processes influencing
pulverized coal combustion
• Turbulent/swirling flow of air and coal.
• Turbulent/convective/molecular diffusion of
gaseous reactants and products.
• Convective heat transfer through the gas and
between the gas and coal particles.
• Radiative heat transfer between the gas and
coal particles and between the coal/air
mixture and the furnace walls.
19. From Fumifugium by John Evelyn (1661)
- on London’s air pollution -
“…but so universally mixed with the otherwise wholesome and excellent Aer,
that her Inhabitants breathe nothing but an impure and thick Mist,
accompanied by a fuliginous and filthy vapour, which renders them
obnoxious to a thousand inconveniences, corrupting the Lungs, and
disordering the entire habit of their Bodies; so that Catharrs, Phthisicks,
Coughs and Consumptions, rage more in this one City, than the whole Earth
besides. For when in all other places the Aer is most Serene and Pure, it is
here Ecclipsed with such a Cloud of Sulphure, as the Sun itself, which gives
day to all the World besides, is hardly able to penetrate and impart it here; and
the weary Traveller, at many Miles distance, sooner smells, than sees the City
to which he repairs. This is that pernicious Smoake which sullyes all her
Glory, superinducing a sooty Crust or Fur upon all that it lights, spoyling the
moveables, tarnishing the Plate, Gildings and Furniture, and corroding the
very Iron-bars and hardest Stones with those piercing and acrimonious Spirits
which accompany its Sulphure; and executing more in one year, than exposed
to the pure Aer of the Country it could effect in some hundreds.”
20. Coal Combustion Air Pollutants
• CO2
• CO
• NOx
• SOx
• Particulate matter
• Trace metals
• Organic compounds
21. Carbon Dioxide, CO2
C + O2 CO2
Almost 99% of C in coal is converted to CO2.
In order to lower CO2 emission levels, coal power
plants will have to leave steam-based systems (37%
efficiency) and go towards coal gasification technology
(60% efficiency).
Meanwhile, CO2 sequestration is being tested.
22. Carbon monoxide, CO
C + ½O2 CO
CO is minimized by control of the
combustion process (air/fuel ratio,
residence time, temperature or turbulence).
23. Particulate Matter
PM composition and emission levels are a
complex function of:
1. Coal properties,
2. Boiler firing configuration,
3. Boiler operation,
4. Pollution control equipment.
Bottom Ash Fly Ash
In PC power plants, since combustion is almost complete, the emitted PM is
primarily composed of inorganic ash residues.
24. PM controls (AP-42, EPA)
Mainly post combustion methods:
Electrostatic precipitator
(ESP)
99% (for 0.1>d(m)>10)
<99% (for 0.1<d (m)<10)
Fabric filter (or baghouse) As high as 99.9%
Wet scrubber 95-99%
Cyclone 90-95% (d(m)>10)
25. Trace metals
Class 1
Elements that are
approximately equally
concentrated in the fly
ash and bottom ash
(Mn, Be, Co, Cr)
Class 2
Elements that are
enriched in fly ash
relative to bottom ash
(Ar, Cd, Pb, An)
Class 3
Elements which are
emitted in the gas
phase (mainly Hg).
Control of total
particulate matter
emissions
Collection of fine
particles.
Sorbents ???
CONTROL
FORMATION
Concentration of metal in coal, physical and chemical properties of the
metal, combustion conditions.
26. Organic Compounds
Include volatile, semivolatile and condensable organic
compounds either present in the coal or formed as
a product of incomplete combustion.
Characterized by hydrocarbon class: alkanes,
alkenes, aldehydes, alcohols and substituted
benzenes.
The main groups of environmental concern are:
1) tetrachloro- through octachloro- dioxins and
furnans.
2) Polycyclic organic matter (POM).
Emissions dependent on combustion behavior in the
boiler (air/fuel ratio, residence time, temperature or turbulence).
28. Sulfur in coal (<10%)
Organic sulfur (40%)
Chemically bonded to the hydrocarbon matrix
in the forms of thiophene, thiopyrone, sulfides
and thiol.
Inorganic sulfur (60%)
Imbedded in the coal, as loose pyrite - FeS2
or marcasite, and calcium/iron/barium
sulfates.
Sources of sulfur in coal: Seawater sulfates,
Limestone
32. Nitrogen in Coal (1-2%)
Name Structure ~ Relative
amount
Stability
Pyridine1 15-40% More stable
Pyrrole1 60% Less stable
Aromatic
amines
6-10% Stable
N
N
H
NH2
··
··
1Including structures made up of 2-5 fused aromatic rings.
34. Thermal NO
(Zeldovich mechanism)
N2 + O NO + N
N + O2 NO + O
Strong temperature-dependence: >1300-1500°C
Not a major source of NO in coal utility boilers.
35. Prompt NO
N2 + CHx HCN + N + …
N + OH NO + H
Prevalent only in fuel-rich systems.
Not a major source of NO in coal utility boilers.
36. Fuel NO (-N in volatiles)
Fuel-N HCN/NH3
volatiles
(formation)
(destruction)
HCN/NH3 + O2
N2
NO
NO + HCN/NH3
The major source of NO in coal utility boilers (>80%).
37. Char NO (-N in the char)
Char-N + ½O2 NO
Char-C + NO ½N2 + Char(O)
(formation)
(destruction)
[char-NO = ~25%] < [volatiles-NO = ~75%]
38. NO Reduction
Combustion controls:
1. Modification of combustion configuration:
• Reburning
• Staged Combustion (air/fuel)
Post combustion controls:
1. Injection of reduction agents in flue gas.
2. Post-combustion denitrification processes.
41. NOx control options
(from AP-42, EPA)
Control Technique NO Reduction Potential(%)
Overfire air (OFA) 20-30
Low Nox Burners (LNB) 35-55
LNB + OFA 40-60
Reburn 50-60
SNCR 30-60
SCR 75-85
LNB with SCR 50-80
LNB with OFA and SCR 85-95
(Selective Non Catalytic Reduction)
(Selective Catalytic Reduction)
42. Fuel Oil and Coal Consumption for Electricity
in Israel (1980-2001) (1000 Tons)
Source: Israeli CBS, 2001
0
2000
4000
6000
8000
10000
12000
1980 1990 1999 2000 2001
Fuel Oil Coal
43. Fuel Combustion Emissions in Israel
by Fuel, 2002 (1000 Tons)
Source: Israeli Central Bureau Statistics (CBS), 2002
0
100
200
300
400
500
LPG Gasoline Diesel Oil Coal Heavy Fuel
Oil
CO SOx NOx SPM
44. Fuel Combustion Emissions in Israel
by Sector, 2002 (1000 Tons)
Source: Israeli CBS, 2002
0
100
200
300
400
500
Motor Vehicles Industry Electricity
Production
CO SOx NOx SPM
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
Motor Vehicles Industry Electricity
Production
CO2
45. 1) Coal combustion in Israel has tripled since
1990. Almost all of coal use is for
electricity production.
2) Coal combustion emissions in Israel:
• 71% of total SO2 emissions.
• 62% of total CO2 emissions.
• 39% of total NOx emissions.
• 38% of total SPM emissions.
• 1% of total CO emissions.
46. Gas Burner
Low pressure burners
Operate over range of 25-100 mm Water Column Gas Supply Pressure
High pressure burners operate over range of 120 – 1750 mm WC
47. Draft
Draft : The function of draft is to exhaust the products of combustion into the
atmosphere.
Natural Draft : It is the draft produced by a chimney alone. It is caused by the
difference in weight between the column of hot gas inside the chimney and column
of outside air of the same height and cross section.
Mechanical Draft: It is draft artificially produced by fans. (Three basic types)
Balanced Draft: Forced-draft fan pushes air into the furnace and an induced-draft
fan draws gases into the chimney thereby providing draft to remove the gases from
the boiler. (0.05 to 0.10 in. of water gauge below atmospheric pressure)
Induced Draft: Fan provides enough draft for flow into the furnace, causing the
products of combustion to discharge to atmosphere. Furnace is kept at a slight
negative pressure below the atmospheric pressure
Forced Draft: The Forced draft system uses a fan to deliver the air to the furnace,
forcing combustion products to flow through the unit and up the stack.
48. Knowing how a Combustion
Engine works
Showing us through
an animation design,
Luke explained to us
how a combustion
engine operates.
49. Fuels
We tested both Methanol
and Acetone, we found
that Methanol provided
more power than Acetone.
As we increased the load on
the engine, the RPMs
decreased while the torque
increased.
50. Power = RPMs x Torque
Methanol Power vs. RPM
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8
RPM
Power
51. Acetone Power vs. RPM
0
50
100
150
200
250
300
350
0 2 4 6 8 10
RPM
Power
Power = RPMs x Torque
52. Alternator
• Our engine was hooked up
to a generator/alternator
and we were able to turn
on a 50 Watt light bulb.
• Also, we used to
multimeter to measure the
voltage and current output
53. Piston-Cylinder models
• We made piston-cylinders with the
connecting rods
• Unfortunately we have to finish them at
home
• Our models convert linear motion (from the
piston-cylinder) to rotational motion (for the
wheels)