ME2301 THERMAL ENGINEERING
SUBJECT DESCRIPTION AND OBJECTIVES
DESCRIPTION
 Heating or cooling of processes, equipment, or enclosed environments are within the
purview of thermal engineering.
 One or more of the following disciplines may be involved in solving a particular thermal
engineering problem:
o Thermodynamics
o Fluid mechanics
o Heat transfer
o Mass transfer
OBJECTIVES:
 To integrate the concepts, laws and methodologies from the first course in
thermodynamics into analysis of cyclic processes
 To apply the thermodynamic concepts into various thermal application like IC engines,
Steam Turbines, Compressors and Refrigeration and Air conditioning systems
ME2301 THERMAL ENGINEERING
LTPC
3 104
UNIT I : GAS POWER CYCLES
9
Otto, Diesel, Dual, Brayton cycles, Calculation of mean effective pressure, and air standard
efficiency -Actual and theoretical PV diagram of four stroke and two stroke engines
UNIT II : INTERNAL COMBUSTION ENGINES
9
Classification - Components and their function - Valve timing diagram and port timing diagram Comparison of two stroke and four stroke engines - Carburetor system, Diesel pump and injector
system. Performance calculation - Comparison of petrol and diesel engine - Lubrication system
and Cooling system - Battery and Magneto Ignition System – Formation of exhaust emission in
SI and CI engines
UNIT III : STEAM NOZZLES AND TURBINES
9
Flow of steam through nozzles, shapes of nozzles, effect of friction, critical pressure ratio,
supersaturated flow, Impulse and Reaction principles, compounding, velocity diagram for simple
and multi-stage turbines, speed regulations –Governors.
UNIT IV : AIR COMPRESSOR
9
Classification and working principle of various types of compressors, work of compression with
and without clearance, Volumetric efficiency, Isothermal efficiency and Isentropic efficiency of
reciprocating compressors, Multistage air compressor and inter cooling –work of multistage air
compressor
UNIT V : REFRIGERATION AND AIR CONDITIONING
9
Vapour compression refrigeration cycle- super heat, sub cooling - Performance calculations working principle of vapour absorption system, Ammonia –Water, Lithium bromide –water
systems (Description only) - Alternate refrigerants – Comparison between vapour compression
and absorption systems - Air conditioning system: Types, Working Principles - Psychrometry,
Psychrometric chart - Cooling Load calculations - Concept of RSHF, GSHF, ESHF - (Use of
standard thermodynamic tables, Mollier diagram, Psychrometric chart and refrigerant property
tables are permitted in the examination)
TOTAL: 60 PERIODS
TEXT BOOKS:
1. Sarkar, B.K,”Thermal Engineering” Tata McGraw-Hill Publishers, 2007
2. Kothandaraman.C.P., Domkundwar.S,Domkundwar. A.V., “A course in thermal
engineering,”Dhanpat Rai &sons ,Fifth edition, 2002
REFERENCES:
1.Rajput. R. K., “Thermal Engineering” S.Chand Publishers , 2000
2. Arora.C.P,”Refrigeration and Air Conditioning ,” Tata McGraw-Hill Publishers 1994.
3. Ganesan V..” Internal Combustion Engines” , Third Edition, Tata Mcgraw-Hill 2007
4. Rudramoorthy, R, “Thermal Engineering “,Tata McGraw-Hill, New Delhi,2003.
MICRO LESSON PLAN
WEEK Hours
LECTURE TOPICS
READING
UNIT I GAS POWER CYCLES
I
1
Introduction
T2
2
Otto cycle
T2
3
Diesel cycle
T2
4
Problems for practice
T2
5
Dual cycle
T2
6
Brayton cycle
T2
7
Calculation of mean effective pressure
T2
8
Calculation of air standard efficiency
T2
9
Problems for practice
T2
10
Actual and theoretical PV diagram of four stroke two stroke engines
T2
11
Actual and theoretical PV diagram of two stroke engines
T2
12
Problems for practice
T2
II
III
UNIT IV AIR COMPRESSOR
III
IV
13
Classification of various types of compressors
T2
14
Working principle of various types of compressors
T2
15
Work of compression with clearance
T2
16
Work of compression without clearance
T2
17
Volumetric efficiency
T2
18
Isothermal efficiency of reciprocating compressors
T2
19
Isentropic efficiency of reciprocating compressors
T2
20
Multistage air compressor
T2
21
Problems for practice
T2
22
Inter cooling
T2
23
Work of multistage air compressor
T2
24
AV class
T2
UNIT III STEAM NOZZLES AND TURBINES
V
VI
VII
25
26
27
28
29
30
31
32
33
34
35
36
Flow of steam through nozzles
Shapes of nozzles
Effect of friction
Critical pressure ratio
Supersaturated flow
Impulse and Reaction principles
AV class
Compounding
Velocity diagram for simple and multi-stage turbines
Speed regulations
Problems for practice
Governors
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
UNIT V REFRIGERATION AND AIR CONDITIONING
VII
VIII
IX
37
38
39
40
41
42
43
44
45
46
47
48
Vapour compression refrigeration cycle
super heat, sub cooling
Performance calculations
Problems for practice
AV class
working principle of vapour absorption system Ammonia -Water
Comparison between vapour compression and absorption systems
Air conditioning system: Types, Working Principles
Psychrometry, Psychrometric chart - Cooling Load calculations
Concept of RSHF
Concept of GSHF
Concept of ESHF
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
UNIT II INTERNAL COMBUSTION ENGINES
IX
X
XI
49
50
51
52
53
54
55
56
57
58
59
60
Classification of internal combustion engines
Components and their function
Valve timing diagram and port timing diagram
Comparison of two stroke and four stroke engines
Carburettor system
Diesel pump and injector system
Performance calculation
Comparison of petrol and diesel engine
Lubrication system and Cooling system
Battery and Magneto Ignition System
Formation of exhaust emission in SI Engines
Formation of exhaust emission in CI Engines
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
PREPARED BY,
K.MARIAPPAN, AP/MECH.