heat engine
TRANSCRIPT
![Page 1: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/1.jpg)
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
![Page 2: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/2.jpg)
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.
![Page 3: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/3.jpg)
Elementary Heat Engine
![Page 4: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/4.jpg)
Classification of Heat Engines
• External combustion engines
![Page 5: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/5.jpg)
• Internal combustion Engines
![Page 6: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/6.jpg)
Heat Engine Cycles
![Page 7: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/7.jpg)
1. CARNOT CYCLE
![Page 8: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/8.jpg)
• 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.
![Page 9: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/9.jpg)
Carnot cycle processes
![Page 10: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/10.jpg)
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.
![Page 11: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/11.jpg)
RANKINE CYCLE
![Page 12: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/12.jpg)
![Page 13: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/13.jpg)
![Page 14: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/14.jpg)
OTTO CYCLE ( constant volume cycle )
![Page 15: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/15.jpg)
P-V and T-S diagram for Otto cycle
![Page 16: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/16.jpg)
Application
![Page 17: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/17.jpg)
DIESEL CYCLE
![Page 18: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/18.jpg)
P-V & T-S diagram for Diesel cycle
![Page 19: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/19.jpg)
Application
![Page 20: Heat engine](https://reader031.vdocuments.net/reader031/viewer/2022020116/55a3e0981a28ab1e7c8b45f0/html5/thumbnails/20.jpg)