12ME2404 THERMAL ENGINEERING 3 1 0 4

COURSE OBJECTIVES To integrate the concepts, laws and methodologies from the first course in

thermodynamics into the analysis of different cyclic processes. To understand the principle and performance of an IC Engine.

To understand the principle thermal system like, Refrigeration, and Air Conditioning System.

COURSE OUTCOMES

On completion of this course, the students will be able to

CO1 : Integrate the concepts, laws and methodologies of thermodynamics into the analysis of different gas power cycles and standard Rankine cycle.

CO2 : Appraise the need for reheating and regeneration in Rankine cycle, Binary vapour cycle and to evaluate the performance of the IC Engines.

CO3 : Distinguish the different types of refrigeration systems and to apply the concepts of psychrometric process to analyze different types of air conditioning systems.

PROGRAMME OUTCOMES

a. An ability to apply knowledge of Mathematics, Science, and Engineering.

c. An ability to design a mechanical, thermal or allied system, component, or process to meet desired needs within realistic constraints such as economic, environmental, social, geographical, manufacturability, and sustainability with due considerations of health and safety.

e. An ability to identify, formulate, and solve engineering problems

g. An ability to communicate effectively in oral, written, visual and other forms.j. Knowledge of contemporary issues and its appropriate usage in the profession.

UNIT - I GAS POWER CYCLES 12Air standard cycle– Assumptions– Otto, Diesel, Dual– Calculation of mean effective pressure and air standard efficiency– Numerical examples– Brayton cycle– Reheat and Regeneration of Brayton cycles.

UNIT - II STEAM POWER CYCLES 12Standard Rankine cycle, Carnot Vapour cycle– Methods to improve efficiency of Rankine cycle– Reheat and regenerative cycle– Numerical examples– Binary vapour cycle.

UNIT - III INTERNAL COMBUSTION ENGINES 12Classification of IC engine, principle and working of two stroke and four stroke petrol and diesel engines, valve and port timing diagrams. Comparison of two stroke and four stroke engines. Actual and theoretical P-V diagram of four stroke and two stroke engines. Testing and performance of IC engines. Numerical problems Knocking and Detonation.

UNIT - IV REFRIGERATION 12Refrigerants– Types and properties, eco-friendly refrigerants– Methods of refrigeration– Working principle vapor compression refrigeration cycle – Super heating and sub cooling. Performance calculations of VCRS. Working principle of vapor absorption refrigeration system. Ammonia– Water, Lithium bromide– Water systems, Comparison between vapor compression and vapour absorption systems.

UNIT - V PSYCHROMETRY AND AIRCONDITIONING 12Properties of atmospheric air – Psychrometric charts, property calculations of air vapour mixtures. Psychrometric processes– Sensible heat exchange processes. Latent heat exchange processes. Adiabatic mixing, evaporative cooling, numerical problems.Air conditioning systems– Summer, winter and year round – Description of window, split and central air conditioning systems – Cooling load calculations – Concept of RSHF, GSHF and ESHF.

Total Periods (45+15T) : 60TEXT BOOKS:

1. Rajput. R.K., “Thermal Engineering”, Laxmi Publishers, 6th Edition, 2006.2. Kothandaraman.C.P. Domkundwar.S. and Domkundwar A.V., “A Course in

Thermal Engineering”, Dhanpat Rai& Sons, 5th Edition, 2002.DATA BOOK:

1. Khurmi. R.S, 2012, Steam Tables – S.Chand publisher, 2012.2. Refrigeration Tables - Kothandaraman.C.P, New Age International Publishers,

3rd Edition, 2011.

REFERENCE BOOKS:

1. Rudramoorthy. R, “Thermal Engineering”, Tata McGraw Hill, 3rd Edition, 2003.

2. Ganesan.V, “Internal Combustion Engines”, Tata McGraw Hill, 1st Edition, 1995.

3. Arora.C.P.,”Refrigeration and Air conditioning”, Tata McGraw Hill Publishing

Company, 2nd Edition, 2000.

4. Mathur. M.L, Sharma R.P, “Internal Combustion Engines”, Dhanpat Rai and

Sons, 1st Edition, New Delhi, 1997.