WITH EFFECT FROM THE ACADEMIC YEAR 2010 - 2011

AE 251                                                THERMAL ENGINEERING

Instruction       4 Periods per week

Duration of University Examination  3 Hours

University Examination          75 Marks

Sessional         25 Marks

UNIT-I          FIRST LAW OF THERMODYNAMICS                                           

System, thermodynamic equilibrium, state, property, process, cycle, zeroth law of thermodynamics, energy, work, heat, first law of thermodynamics, PMM I, ideal gases, application of first law of thermodynamics to closed and open systems, pressure – volume diagrams, steady flow process, application of steady flow energy equation.

UNIT-II          SECOND LAW OF THERMODYNAMICS                                  Limitations of first law, statements of second law of thermodynamics, PMM II, Clausius inequality, heat engine, heat pump, refrigerator, Carnot cycle, Carnot theorem, entropy, temperature – entropy diagram, entropy changes for a closed system.

UNIT-III         GAS POWER CYCLES, FLUID FLOW AND VAPOUR POWER CYCLE          

Air standard Brayton cycle with intercooling, reheating and regeneration properties of steam, one-dimensional steady flow of gases and steam through nozzles and diffusers, Rankine cycle.

UNIT - IV       RECIPROCATING AIR COMPRESSORS, STEAM POWER PLANT     

Single acting and double acting air compressors, work required, effect of clearance volume, volumetric efficiency, isothermal efficiency, free air delivery. Multistage compression, condition for minimum work. Fundamentals OF Refrigeration, C.O.P., reversed Carnot cycle, simple vapour compression refrigeration system, T.-S, P-H diagrams, simple vapour absorption refrigeration system, desirable properties of an ideal refrigeration.    

UNIT -V          FUNDAMENTALS OF HEAT TRANSFER

Modes of heat transfer, Fourier’s law of conduction, one dimensional steady state conduction through plane and composite walls, cylinders and spheres.  Free and forced convection, dimensionless numbers, thermal boundary layer, heat transfer co-efficient, simple problems in fins, heat transfer between fluids separated by plane and cylindrical walls. Overall heat transfer coefficient, heat exchangers, LMTD. Concept of radiation,  Plank’s law, Wien’s displacement law, Stefan Boltzman law, black body and grey body radiation.

Suggested Reading

1. 1.R.K.Rajput, “Textbook of Engineering thermodynamics”- Laxmi Publications (P) Ltd, New Delhi, 2001.
2. 2.P.L. Ballaney, “ Thermal Engineering”,  Khanna Publications, 2003.
3. 3.P.K. Nag, “Engineering Thermodynamics”, Tata McGraw Hill, 2005.
4. 4.R.S. Kurmi & J.K.Guptha “A text book of thermal Engineering”, S. Chand & Co., 2003.