The document discusses the Stirling engine, an external combustion engine that uses the expansion and contraction of gases to produce useful work. It describes the Stirling engine's inventor, Robert Stirling, and provides details on its history, types, parts, cycle of operation, advantages over internal combustion engines in being pollution-less, and applications. The conclusion reiterates that the Stirling engine uses heat from an external source to expand and contract trapped gases for power production without combustion or exhaust, making it a pollution-less alternative.

1. Government Polytechnic, Nashik
(An Autonomous Institute of Govt. of Maharashtra State)

2. SEMINAR TOPIC
POLLUTION LESS ENGINE
(STIRLING ENGINE)
Name: Tejas Santosh Chandre
Roll No: 208106
Guide: Prof. T.G. Chavan sir

3. Contents:
■ What is Stirling Engine ?
■ History
■ Types Of Stirling Engine
■ Parts of Stirling Engine
■ Stirling Cycle
■ Advantages
■ Disadvantages
■ Applications
■ Conclusion

4. What is Stirling Engine ?
■ The Stirling engine is a heat
engine that is vastly different
from an internal combustion
engine.
■ It is an external combustion
engine.

5. ■ Inventor Of Stirling Engine :
Robert Stirling (1790-1878)
■ Invented Stirling Engine In 1816
Which could not explode And
Produce more power Then Steam
Engine Used.
History:

6. Types Of Stirling Engine :
1. Two piston Type Stirling Engine.
■ Two-piston type Stirling engine uses two power pistons.
■ One Is Hot Piston, Which Used In Hot Chamber.
■ Other One is Cold Piston, Which Used In Cold Chamber.

7. 2. Displacer Type Stirling Engine.
■ The Displacer Type Stirling engine uses A power Piston and Displacer.
■ The space below a displacer piston is always heated by a heat source.
■ The space above the displacer piston is cooled always by cold air.
■ The displacer piston displaces hot air and cold air.

8. ■ Main Chamber
■ Output Shaft
■ Displacer
■ Crankshaft
■ Regenerator
Parts of Stirling Engine:

9. ■ The key principle of Stirling engine is that a fixed amount of gas is sealed
inside the engine.
■ The Stirling cycle involves a series of events that change the pressure of
gas inside the engine , causing it to work.
■ Stirling engine uses two cylinders, one cylinder is heated by an external
heat source and the other is cooled by an external cooling source.
Stirling Cycle :

10. ■ There are 4 Steps Of Stirling Cycle as Follows:
1. Expansion
2. Transfer
3. Contraction
4. Transfer

11. Advantages:
 Gas Inside The engine Never Leaves The Engine.
 These Engines are quiter In Operation.
 No combustion Takes place inside Cylinder Of Engine.
 Hence, There Is No Explosion

12. Disadvantages:
 Greater Volume and Greater Weight.
 Higher Economic Cost of The engine.
 The Stirling engine have Slower Start.
 More Dangerous.

13. Applications:
■ Water pump stations
■ Combined heat and power plant
■ Solar power generation
■ Stirling cyrocoolers
■ Heat pump
■ Marine engines
■ Nuclear power
■ Aircraft engines
■ Micro CHP

14. Conclusion:
■ The Stirling engine, types, parts; working cycle, advantages along with recent
applications has been empounded in this paper
■ The expansion and contraction of the gas, using heat from external source, creates the
useful work.
■ This engine can work on any type of fuel whether it is conventional or non-conventional
fuel. And the basic advantage of this engine is that the amount of gas inside the chamber
remains fixed that is there is no exhaust and hence this engine is pollution less.