what is cornot cycle
Answers
Explanation:
The Carnot cycle is a theoretical ideal thermodynamic cycle proposed by French physicist Sadi Carnot in 1824 and expanded upon by others in the 1830s and 1840s. It provides an upper limit on the efficiency that any classical thermodynamic engine can achieve during the conversion of heat into work, or conversely, the efficiency of a refrigeration system in creating a temperature difference by the application of work to the system. It is not an actual thermodynamic cycle but is a theoretical construct.
Cornot's engine works in four states. The stages are explained below using PV diagram.
Consider 1 mole of a perfect gas in a cylinder provided with frictionless piston.
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Stage - 1:- Isothermal expansion:-
The cylinder is placed on the source maintained at a temperature T1. The gas is allowed expand Isothermally. During this expansion, the gas absorbs an amount of heat Q1 for the source at constant temperature T1 K. This Isothermal change is represented by the curve AB.
Stage - 2 :- Adiabatic expansion:-
The cycle is placed on the insulating stand and the gas is allowed to expand adiabatically till the temperature falls from T1 to T2. This adiabatic expansion is represented by the curve BC.
Stage - 3 :- Isothermal compression:-
The cylinders next place on the sink end of gases compressed Isothermally. During this process is a certain amount of heat Q2 is rejected into the sink. This isothermal compression is represented by the curve CD.
Stage - 4 :- Adiabatic Compression:-
Again the cylinder is placed on the non conducting stand. The gas is compressed adiabatically till it returns to its initial state. The adiabatic compression is represented by the curve DA.
The curve ABCD represent a carnot's cycle. The area of the loop ABCD gives total work per cycle.
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Note:- Kindly look into the diagram given in the attachment.
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