Thermal Engine & Carnot's Cycle and their Working Principle
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- 5. In thermodynamics, a heat engine is a system that converts heat or thermal energy to mechanical energy, which can then be used to do mechanical work. It does this by bringing a working substance from a higher state temperature to a lower state temperature.
- 6. Parts Of Heat Engine Hot Body (source of heat) Q1 Cold Body (absorbs heat) Q2 W Working substance
- 7. Defination: Carnot’s Engine: In order to express an explanation of the convertion of heat into work , Sadi Carnot imagines an idle heat engine which is known as Carnot’s Engine. Heat source sink Heat instractor deck Cylender With piston
- 8. Sadi Carnot was a French military engineer and physicist.
- 9. Carnot’s Cycle: cycle in which the working substance starting a state of certain temperature, pressure and volume is made to undergo two successive expansions (isothermal & adiabatic) and then two successive compressions and then brought back finally to its initial state is called Carnot cycle.
- 10. Adiabatic process: The process in which a system neither receives heat nor rejects heat is called adiabatic process. In this process a gas undergoes changes in pressure, volume and temperature under thermal isolation. IsoThermal Process: When a gas undergoes a change in pressure and volume at constant temperature, the gas is said to undergo an isothermal change, and the process in which the change takes place is called isothermal process.
- 11. • Carnot’s cycle consisting of four reversible processes(any substance): Reversible isothermal expansion Reversible adiabatic expansion Reversible isothermal compression Reversible adiabatic compression 1-2 2-3 3-4 4-1
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- 17. Isothermal process is possiable if it is very slow and Adiabatic process is possiable if it is very fast. This Alternate Combination of very fast very slow process is not posiable to achieve in actual practice.