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Stirling engine
- 1. STIRLING ENGINE GUIDED BY: Amijith A M Lecturer Department of Mechanical Engg. PRESENTED BY: SANJITH B S Sememester - 5 Department of Mechanical Engg.
- 2. CONTENTS • Introduction • Types of stirling engine • Components • Working • Alpha Stirling Engine • Beta Stirling Engine • Gamma Stirling Engine • Application • Advantages • Disadvantages • Conclusion • Referances
- 3. Introduction • Stirling engine is a heat engine • Converts heat energy to mechanical work • Developed and patened in 1816 • Inventor : Robert Stirling • Works on any heat source • It is vastly different from IC engines • EC engine • Closed working cycle • Works on temperature difference
- 4. Types of stirling engine The three major types of stirling engine are -: 1. Alpha Stirling Engine 2. Beta Stirling Engine 3. Gamma Stirling Engine
- 5. Components • Regenerator • Power Piston • Displacer • Crank shaft • Flywheel • Heat dissipation Fins
- 6. Working
- 7. Alpha Stirling Engine Cold air Regenerator Heat source Hot air Crank shaft
- 8. Alpha Stirling Engine 4 Strokes -: 1. Expantion 2. Transfer 3. Contraction 4. Transfer
- 9. Beta Stirling Engine Hot end of cylinder Cold end of cylinder Power Piston Displacer piston Fly wheel Cold gas or air Hot gas or air Fins for cooling
- 12. Application • Electric generation • Prime mover • Micro-CHP • Nuclear power plants • Heat pump • Water pump • Cryogenic refrigerators for missile guidance (below 150 K) • Ideal for use in domestic homes (1KW,50Hz) • Submarines (The Gotland-class submarines of the Swedish Navy)
- 13. Advantages • Can use any heat source • More thermal efficient (approx: 40% vs modern engines 20-25%) • Less pollution (also less noise) • Can generate AC power • Simple working priciple • Simple design • Can be a replacement for steam turbines and steam engines • Low power densities
- 14. Disadvantages • Initial capital is high • Change their power output levels slowly • Heavier (and more expensive) • A Stirling engine cannot start instantly
- 15. Conclusion • Have a range of applications • They are often expensive to build • Have rarely been used in commercial power generating systems. • The Stirling engine is the interesting alternative way to commercialize the waste heat. • One of the ways to increase the effectiveness is to find the optimal mechanism to gear the engine pistons and optimize its parameters (dimensions).
- 16. References • www.wikipedia.org/wiki/Stirling_engine • www.sciencedirect.com/topics/engineering/stir ling-engine • www.auto.howstuffworks.com/stirling- engine.htm • www.seminarstopics.com/pollution-less- engine
- 17. Thank you
- 18. Q