The document discusses internal combustion engines and their classification. It covers:
1) The different cycles of operation for IC engines including Otto, Diesel, and dual combustion cycles.
2) The assumptions and calculations used in air standard efficiency analysis which approximates real engine cycles.
3) Key parameters that determine thermal efficiency and work output for different cycles.
Brayton cycle is a air standard cycle used to understand working of gas turbines. It is constant pressure cycle which shows how process are going in gas turbine.
The various forces acts on the reciprocating parts of an engine.
The resultant of all the forces acting on the body of the engine due to inertia forces only is known as unbalanced force or shaking force.
Gas Turbine Theory - Principle of Operation and ConstructionSahyog Shishodia
This presentation tells all about basic principle behind Gas Turbine, their working, operation and construction. How they came into existence and where are they used.
The gas turbine is an internal combustion engine that uses air as the working fluid. The engine extracts chemical energy from fuel and converts it to mechanical energy using the gaseous energy of the working fluid (air) to drive the engine and propeller, which, in turn, propel the aeroplane.
Brayton cycle is a air standard cycle used to understand working of gas turbines. It is constant pressure cycle which shows how process are going in gas turbine.
The various forces acts on the reciprocating parts of an engine.
The resultant of all the forces acting on the body of the engine due to inertia forces only is known as unbalanced force or shaking force.
Gas Turbine Theory - Principle of Operation and ConstructionSahyog Shishodia
This presentation tells all about basic principle behind Gas Turbine, their working, operation and construction. How they came into existence and where are they used.
The gas turbine is an internal combustion engine that uses air as the working fluid. The engine extracts chemical energy from fuel and converts it to mechanical energy using the gaseous energy of the working fluid (air) to drive the engine and propeller, which, in turn, propel the aeroplane.
ANALYSIS OF THE COMBUSTION FUMES AND GASES RELEASED DURING THE BURNING OF SOM...Claudio Liciotti
Along with the strong growth of PV installations, also the
number of fires involving PV systems has grown. The fire
risk analysis due to PV systems has been taken into strong
consideration. About that, 3 were the most considered
issues:
1) PV modules and components fire behavior;
2) causes of fire ignition related to PV components;
3) risk of electrocution in firefighting activities in proximity
to photovoltaic generators.
To protect the firefighter and to respect the environment,
the type of fumes and gases that are released into the
environment during a fire of a PV system should also be
considered.
This paper shows the analysis of the fumes and gases
released during the burning and pyrolysis of some c-Si PV
modules.
Power Plants and Basic Thermodynamic CyclesSalman Haider
Brief overview of different types of power plants and their basic thermodynamic cycles.
The content is of basic maturity.
Audience:
Students, teachers or to whom it may concern
References:
1. Gas Turbine Engineering Handbook – Meherwan P. Boyce 2nd Edition
2. Thermodynamics an Engineering Approach – Yunus A. Cengel
3. Internal Combustion Engines – G.W. Ganeson
4. https://en.wikipedia.org/wiki/Power_station
5. https://en.wikipedia.org/wiki/Fossil-fuel_power_station
(
ME- 495 Laboratory Exercise
–
Number 1
– Brayton Cycle -
ME Department, SDSU
-
Nourollahi
) (
11
)Brayton Cycle (Gas Turbine Power Cycle)
Objective
The objective of this lab exercise is to gain practical knowledge of the Brayton cycle. The Brayton cycle illustrates the cold-air-standard assumption (constant specific heats at room temperature) model of a gas turbine power cycle. A portable propulsion laboratory[footnoteRef:1] containing a Model SR-30 turbojet is used in this exercise. The student shall apply the basic equations for Brayton cycle analysis by using empirical measurements at different points in the Brayton cycle. [1: Manufactured by Turbine Technologies Ltd. Called TTL Mini-Lab]
Figure 1: TTL Mini-Lab manufactured by Turbine Technologies Ltd. (TTL)Background
A simple gas turbine engine has three main components: a compressor section, a combustion chamber and a turbine section. Basic operation entails drawing atmospheric air into the compressor where it is heated through compression. The compressed and heated air is mixed with fuel in the combustion chamber. The air/fuel mixture burns at constant pressure in the combustion chamber. The resulting hot gas is directed to the turbine section where it expands. As the gas expands it produces a thrust reaction and performs work by turning the turbine. The turbine is connected to the compressor by a shaft. The resulting shaft work is used to drive the compressor and auxiliary power supplies.
The gas turbine has wide spread application. Most notably, it is used to power and propel aircraft and large ships. In some cases only the thrust resulting from the expanding gas exiting the turbine is used for propulsion and the shaft work is used to drive the compressor and power electrical systems. In turbo-fan engines some of the shaft work is used to drive a large fan that aids in propulsion. In other applications, such as helicopters and ships, propulsion is achieved through the shaft work, which is used to drive transmission/gear boxes that are connected to the rotor blades or propeller, respectively. Gas turbines are also commonly used to drive large electrical generators in power plant applications.Theory
The Brayton cycle consists of four basic processes (see Figure3 & 4). Low-pressure air is drawn into the compressor section and undergoes isentropic compression. Next, the heated and compressed air is combined with fuel in the combustion chamber. The air/fuel mixture experiences reversible constant pressure heat addition. The resulting hot gas enters the turbine section where it undergoes isentropic expansion. To complete the cycle (the exhaust and intake in the open cycle) the gas experiences reversible constant pressure heat rejection.
Thermodynamics and the First Law of Thermodynamics determine the overall energy transfer. The following assumptions are used when analyzing the gas turbine cycles:
1. The working fluid (air) is an ideal gas throughout the cycle.
2. The combust ...
It describes testing of IC engines and various tests performed.
Also describes engine efficiency and various tests for finding efficiency.
Also gives idea about catalytic converter.
Type of pollution from automobile and its control along with Mass Emission Standards.
Please Like, Share, and Comment if any.
Thanks,
Aditya Deshpande
deshadi805@gmail.com
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
3. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Heat Engines Any type of engine or machine which derives Heat Energy from the combustion of the fuel or any other source and converts this energy into Mechanical Work is known as a Heat Engine . Classification : 1. External Combustion Engine (E. C. Engine) : Combustion of fuel takes place outside the cylinder. e.g. Steam Turbine, Gas Turbine Steam Engine, etc.
4. ME0223 SEM-IV Applied Thermodynamics & Heat Engines 2. Internal Combustion Engine (I.C. Engine) : Combustion of fuel occurs inside the cylinder. Heat Engines e.g. Automobiles, Marine, etc.
5. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Heat Engines Advantages of External Combustion Engines over Internal Combustion Engines : 1. Starting Torque is generally high . 2. Due to external combustion, cheaper fuels can be used ( even solid fuels ! ). 3. Due to external combustion, flexibility in arrangement is possible . 4. Self – Starting units. Internal Combustion Engines require additional unit for starting the engine ! Advantages of Internal Combustion Engines over External Combustion Engines : 1. Overall efficiency is high . 2. Greater mechanical simplicity. 3. Weight – to – Power ratio is low. 4. Easy Starting in cold conditions. 5. Compact and require less space.
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12. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Application of I. C. Engines APPLICATIONS Road vehicles. Aircrafts. Locomotives. Construction Equipments Pumping Sets Generators for Hospitals, Cinema Hall, and Public Places.
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14. Assumptions ME0223 SEM-IV Applied Thermodynamics & Heat Engines 1. The working medium is assumed to be a Perfect Gas and follows the relation PV = mRT 2. There is no change in the mass of the working medium . 3. All the processes that contribute the cycle are reversible . 4. Heat is assumed to be supplied from a constant high temperature source ; and not from chemical reactions during the cycle. 5. Some heat is assumed to be rejected to a constant low temperature sink during the cycle. 6. It is assumed that there are no heat losses from the system to the surrounding. 7. Working medium has constant specific heat throughout the cycle. 8. Physical constants viz. Cp, Cv, γ and M of working medium are same as those of air at standard atmospheric conditions . Cp = 1.005 kJ / kg.K Cv = 0.717 kJ / kg.K γ = 1.4 M = 29 kg / kmole
15. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Otto Cycle Basis of Spark – Ignition Engines . 0 -1 : Suction 1 -2 : Isentropic Compression 2 -3 : Constant Vol. Heat Addition 3 -4 : Isentropic Expansion 1 -0 : Exhaust 4 -1 : Constant Vol. Heat Rejection 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R Qs 1 2 Temperature, T Entropy, s 3 Isochoric 4 Q R
16. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Otto Cycle – Thermal Efficiency 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R
17. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Otto Cycle – Thermal Efficiency 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R
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19. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Otto Cycle – Work Output 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R
20. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Otto Cycle – Mean Effective Pressure Work Output α Pr. Ratio, ( r p ) &, MEP α Internal Work Output 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R Pr. Ratio ↑ ≡ MEP ↑
21. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Diesel Cycle In S. I. Engines, max. compression ratio (r) is limited by self – ignition of the fuel . This can be released if air and fuel are compressed separately and brought together at the time of combustion. i.e. Fuel can be injected into the cylinder with compressed air at high temperature . i.e. Fuel ignites on its own and no special device for ignition is required. This is known as Compression Ignition (C. I.) Engine. Ideal Cycle corresponding to this process is known as Diesel Cycle . Main Difference : Otto Cycle ≡ Heat Addition at Constant Volume. Diesel Cycle ≡ Heat Addition at Constant Pressure.
22. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Diesel Cycle Basis of Compression – Ignition Engines . 0 -1 : Suction 1 -2 : Isentropic Compression 2 -3 : Constant Pr. Heat Addition 3 -4 : Isentropic Expansion 1 -0 : Exhaust 4 -1 : Constant Vol. Heat Rejection Isochoric Qs 1 2 Temperature, T Entropy, s 3 Isobaric 4 Q R 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R
23. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Diesel Cycle – Thermal Efficiency 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R
24. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Diesel Cycle – Thermal Efficiency AND 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R
25. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Diesel Cycle – Thermal Efficiency Efficiency of Diesel Cycle is different than that of the Otto Cycle by the bracketed factor . This factor is always more than unity. (> 1) In practice, however, operating Compression Ratio for Diesel Engines (16 – 24) are much higher than that for Otto Engines (6 – 10) . 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R Otto Cycle is more efficient than Diesel Cycle , for given Compression Ratio Efficiency of Diesel Engine is higher than that of Otto Engine
26. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Diesel Cycle – Work Output 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R
27. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Diesel Cycle – Mean Effective Pressure 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R
28. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Dual Cycle Combustion process is neither Constant Volume nor Constant Pressure Process. 2. Rapid uncontrolled combustion at the end. Hence, a blend / mixture of both the processes are proposed as a compromise. Real engine requires : 1. Finite time for chemical reaction during combustion process. Combustion can not take place at Constant Volume . Combustion can not take place at Constant Pressure .
30. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Dual Cycle – Thermal Efficiency 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R 5 Qs
31. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Dual Cycle – Thermal Efficiency 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R 5 Qs
32. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Dual Cycle – Thermal Efficiency For ( r p ) > 1; η Dual ↑ for given ( r c ) and ( γ ) With ( r c ) = 1 ≡ Otto Cycle With ( r p ) = 1 ≡ Diesel Cycle 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R 5 Qs Efficiency of Dual Cycle lies in between that of Otto Cycle and Diesel Cycle .
33. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Dual Cycle – Work Output 0 1 Pressure, P Volume, V Isentropic 2 Qs 3 4 Q R 5 Qs
34. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Dual Cycle – Mean Effective Pressure 0 1 Pressure, P Volume, V 2 Qs 3 4 Q R 5 Qs
41. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Comparison : Two – Stroke Vs. Four Stroke Sr. No. Particulars Four – Stroke Cycle Two – Stroke Cycle 1. Cycle Completion 4 strokes / 2 revolutions 2 strokes / 1 revolution 2. Power Strokes 1 in 2 revolutions 1 per revolution 3. Volumetric Efficiency High Low 4. Thermal and Part – Load Efficiency High Low 5. Power for same Engine Size Small; as 1 power stroke for 2 revolutions Large; as 1 power stroke per revolutions 6. Flywheel Heavier Lighter 7. Cooling / Lubrication Lesser Greater 8. Valve Mechanism Required Not Required 9. Initial Cost Higher Lower
42. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Comparison : S.I. Vs. C.I. Engines Sr. No. Particulars S. I. Engine C. I. Engine 1. Thermodynamic Cycle Otto Diesel 2. Fuel Used Gasoline Diesel 3. Air : Fuel Ratio 6 : 1 – 20 : 1 16 : 1 – 100 : 1 4. Compression Ratio Avg. 7 – 9 Avg. 15 – 18 5. Combustion Spark Ignition Compression Ignition 6. Fuel Supply Carburettor Fuel Injector 7. Operating Pressure 60 bar max. 120 bar max. 8. Operating Speed Up to 6000 RPM Up to 3500 RPM 9. Calorific Value 44 MJ/kg 42 MJ/kg 10. Running Cost High Low 11. Maintenance Cost Minor Major
43. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Comparison : Gasoline Vs. Diesel Engines Sr. No. Gasoline Engine Diesel Engine 1. Working : Otto Cycle Working : Diesel Cycle 2. Suction Stroke : Air / Fuel mixture is taken in Suction Stroke : only Air is taken in 3. Spark Plug Fuel Injector 4. Spark Ignition generates Power Compression Ignition generates Power 5. Thermal Efficiency – 35 % Thermal Efficiency – 40 % 6. Compact Bulky 7. Running Cost – High Running Cost – Low 8. Light – Weight Heavy – Weight 9. Fuel : Costly Fuel : Cheaper 10. Gasoline : Volatile and Danger Diesel : Non-volatile and Safe. 11. Less Dependable More Dependable
47. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Comparison : Battery Vs. Magneto Ignition Sr. No. Battery Ignition System Magneto – Ignition System 1. Current obtained from Battery Current generated from Magneto 2. Sparking is good even at low speeds Poor sparking at low speeds 3. Engine starting is easier Difficult starting 4. Engine can not be started, if battery is discharged No such difficulty, as battery is not needed 5. More space requirement Less space requirement 6. Complicated wiring Simple wiring 7. Cheaper Costly 8. Spark intensity falls as engine speed rises Spark intensity improves as engine speed rises 9. Used in cars, buses and trucks Used in motorcycles, scooters and racing cars
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49. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Performance of I.C. Engines A. Power and Mechanical Efficiency : Indicated Power ≡ Total Power developed in the Combustion Chamber, due to the combustion of fuel. n = No. of Cylinders P mi = Indicated Mean Effective Pressure (bar) L = Length of Stroke (m) A = Area of Piston (m 2 ) k = ½ for 4 – Stroke Engine, = 1 for 2 – Stroke Engine N = Speed of Engine (RPM)
50. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Performance of I.C. Engines A. Power and Mechanical Efficiency : Brake Power ≡ Power developed by an engine at the output shaft. N = Speed of Engine (RPM) T = Torque (N – m) Frictional Power (F. P.) = I. P. – B. P.
51. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Performance of I.C. Engines B. Mean Effective Pressure : Mean Effective Pressure ≡ Hypothetical Pressure which is thought to be acting on the Piston throughout Power Stroke. F mep = I mep – B mep I mep ≡ MEP based on I.P. B mep ≡ MEP based on B.P. F mep ≡ MEP based on F.P. Power and Torque are dependent on Engine Size . Thermodynamically incorrect way to judge the performance w.r.t. Power / Torque . MEP is the correct way to compare the performance of various engines.
52. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Performance of I.C. Engines C. Specific Output : Specific Output ≡ Brake Output per unit Piston Displacement. D. Volumetric Efficiency : Volumetric Efficiency ≡ Ratio of Actual Vol. (reduced to N.T.P.) of the Charge drawn in during the suction stroke, to the Swept Vol. of the Piston. Avg. Vol. Efficiency = 70 – 80 % Supercharged Engine ≈ 100 %
53. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Performance of I.C. Engines E. Fuel : Air Ratio : Fuel : Air Ratio ≡ Ratio of Mass of Fuel to that of Air, in the mixture. Rel. Fuel : Air Ratio ≡ Ratio of Actual Fuel : Air Ratio to that of Schoichiometric Fuel : Air Ratio . F. Sp. Fuel Consumption : Sp. Fuel Consumption ≡ Mass of Fuel consumed per kW Power.
54. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Performance of I.C. Engines G. Thermal Efficiency : Thermal Efficiency ≡ Ratio of Indicated Work done, to the Energy Supplied by the fuel.
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56. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Performance of I.C. Engines H. Heat Balance : m w = Mass of Cooling Water used (kg/min) Cw = Sp. Heat of Water (kJ/kg. ° C) T 1 = Initial Temp. of Cooling Water ( ° C) T 2 = Final Temp. of Cooling Water ( ° C) m e = Mass of Exhaust Gases (kg/min) C Pg = Sp. Heat of Exhaust Gases @ Const. Pr. (kJ/kg. ° C) T e = Temp. of Exhaust Gases ( ° C) T r = Room Temperature ( ° C) Heat Supplied by Fuel = Heat equivalent of I.P. = Heat taken away by Cooling Water = Heat taken away by Exhaust Gases =
57. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Performance of I.C. Engines H. Heat Balance : Sr. No. Input Amount (kJ) Per cent (%) Output Amount (kJ) Per cent (%) 1. Heat Supplied by Fuel A 100 Heat equivalent to I.P. B α 2. Heat taken by Cooling Water C β 3. Heat taken by Exhaust Gases D γ 4. Heat Unaccounted E = A – (B+C+D) E δ Total A 100 Total A 100