Energy Cycle Lab Report
Experiment No.3
Objective:
Comparison of Ideal & practical VCC on PH-diagram and determination of energy balance across each component
Theory:
Ideal Carnot Cycle:
The basis of today’s VCC is basically the Carnot cycle which is shown below: Processes:
1-2: Isentropic compression in the compressor to increase the temperature and pressure
2-3: Evaporation of the liquid refrigerant while absorbing the heat from its surroundings and creating sensation of cooling.
3-4: Adiabatic throttling to decrease the temperature as well as pressure so that the saturation temperature of the refrigerant entering the evaporator is less than the surrounding temperature
4-1: Condensation of vapors back into liquid while rejecting the heat
Reversed Carnot Cycle: Processes:
1-2: Isentropic compression in the compressor to increase the temperature and pressure
2-3: Condensation of vapors back into liquid while rejecting the heat
3-4: Adiabatic throttling to decrease the temperature as well as pressure so that the saturation temperature of the refrigerant entering the evaporator is less than the surrounding temperature
4-1: Evaporation of the liquid refrigerant while absorbing the heat from its surroundings and creating sensation of cooling.
Modified Reversed Carnot Cycle (VCC): Processes:
1-2: From the evaporator, low-pressure saturated refrigerant vapor comes to the compressor and is compressed into the condenser by volume
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