Heat engine

HEAT ENGINE

1. Sub:-Elements of Mechanical Engineering Topic:- Heat Engines Shroff S.R. Rotary Institute Of Chemical Technology (Managed by Ankleshwar Rotary Education Society ) Approved by AICTE, New Delhi, Govt. of Gujarat & GTU Affiliated Branch:- Mechanical Engg . ( 2 nd SEM) Prepared By Chintan Charola

2. What is Heat Engine? Heat Engine is the device which converts chemical energy of fuel into heat energy & this heat energy is utilized converting it to mechanical work.  A  heat engine  is a system that performs the conversion of heat  to  mechanical energy  which can then be used to do mechanical work .

3. Elementary Heat Engine

4. Classification of Heat Engines External combustion engines

5. Internal combustion Engines

6. Heat Engine Cycles 1. Carnot Cycle 2. Rankine Cycle 3. Otto Cycle 4. Diesel Cycle

7. 1. CARNOT CYCLE

8. Carnot theorem says that No cycle can be more efficient than a reversible cycle operating between the same temperature limits. There are some assumption made in the working of the Carnot cycle.

9. Carnot cycle processes

10. Limitation of Carnot cycle The Carnot Cycle is Hypothetical ( something that doesn't really exist ) Practically it is not possible to neglect friction between piston & cylinder. It is impossible to construct cylinder walls which are perfect insulator. The output obtained per cycle is very small.

11. RANKINE CYCLE

12. OTTO CYCLE ( constant volume cycle )

13. P-V and T-S diagram for Otto cycle

14. Application

15. DIESEL CYCLE

16. P-V & T-S diagram for Diesel cycle

17. Application

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