![]() They include the energy balance equation (EnBE) and exergy balance equation (ExBE) in this order. The first and second law of Thermodynamics for steady-state flow is applied for each component and the whole system. ΔΆ.1 Energy and exergy analysis of vapor-compression RS This type of refrigeration system can be used for refrigerators, inside the air conditioners as split air conditioners, and separate as in radiant cooling systems and air-to-air systems. The vapor refrigeration system is a closed cycle where it starts and ends at state 1. The refrigerant temperature at state 1 is very low so that it absorbs heat from the refrigerated space at the evaporator and heated to be saturated vapor again. ![]() The refrigerant enters an adiabatic throttling or expansion valve to drop the pressure, which equals the pressure at the compressor inlet of state 1. Then, the refrigerant of state 2 enters the condenser to reject heat to the warm environment and exits at the saturated liquid as state 3. The refrigerant enters the compressor from state 1 at saturated vapor to be isentropically compressed from low pressure of state 1 to high pressure and temperature of state 2, which is at the superheated region. Schematic and T-s diagram for the ideal VCRS. ![]()
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