Question

In a vapor compression refrigeration system, cooling occurs when:

a.) Refrigerant liquid turns to a vapor
b.) Refrigerant vapor turns to a liquid
c.) The refrigerant is under maximum pressure
d.) The refrigerant gives off heat

Answer 1

In a vapor compression refrigeration system, cooling occurs when the refrigerant vapor turns to a liquid.

Step-by-step explanation:

In a vapor compression refrigeration system, cooling occurs when the refrigerant vapor turns to a liquid.

The electrically driven compressor raises the temperature and pressure of the gas and forces it into the condenser coils. Because the temperature of the gas is higher than the temperature inside the room, heat transfer to the room occurs and the gas condenses to a liquid. The liquid then flows back through a pressure-reducing valve to the outdoor evaporator coils, being cooled through expansion.

(In a cooling cycle, the evaporator and condenser coils exchange roles and the flow direction of the fluid is reversed.)