Subcooling occurs in which component of a refrigeration system?

Subcooling occurs in which component of a refrigeration system?

• A. Condenser
• B. Evaporator
• C. Compressor
• D. Expansion valve

Answer: (A)

Subcooling is the cooling of the refrigerant liquid below its saturation temperature after it has condensed. This occurs in the condenser because that’s where the refrigerant’s phase change from vapor to liquid takes place and the liquid is cooled further by rejecting heat to the surroundings. By the time the refrigerant leaves the condenser, it is a fully condensed liquid at a temperature below its condensation point—subcooled liquid. This helps prevent flash gas in the expansion device and improves system efficiency by ensuring the liquid entering the metering device stays entirely liquid. The evaporator, compressor, and expansion valve handle other parts of the cycle: the evaporator is where heat is absorbed and vaporizing occurs, the compressor raises the vapor’s pressure, and the expansion valve lowers the pressure to allow boiling.

Subcooling is the cooling of the refrigerant liquid below its saturation temperature after it has condensed. This occurs in the condenser because that’s where the refrigerant’s phase change from vapor to liquid takes place and the liquid is cooled further by rejecting heat to the surroundings. By the time the refrigerant leaves the condenser, it is a fully condensed liquid at a temperature below its condensation point—subcooled liquid. This helps prevent flash gas in the expansion device and improves system efficiency by ensuring the liquid entering the metering device stays entirely liquid. The evaporator, compressor, and expansion valve handle other parts of the cycle: the evaporator is where heat is absorbed and vaporizing occurs, the compressor raises the vapor’s pressure, and the expansion valve lowers the pressure to allow boiling.