The component in an air conditioning or refrigeration system to which the heat from the conditioned space or item being cooled is transferred to the refrigerant is the

• A. Condenser
• B. Evaporator
• C. Receiver
• D. Compressor

Answer: (B)

Heat transfer from the space being cooled to the refrigerant happens in the evaporator. In this part of the cycle, the refrigerant enters as a low-pressure, low‑temperature liquid. As air from the conditioned space passes over the evaporator coil, the refrigerant absorbs heat and boils into a gas. This cooling of the air inside the space is accomplished while the refrigerant captures that heat.

The other components have different roles: the condenser releases the absorbed heat to the outside, the compressor raises the refrigerant’s pressure and temperature to drive the cycle, and the receiver stores liquid refrigerant. But the heat uptake from the space into the refrigerant occurs at the evaporator, making it the correct choice.