Which component of a heat pump is responsible for pumping refrigerant and raising vapor temperature?

The component of a heat pump responsible for pumping refrigerant and raising vapor temperature is the compressor. The compressor's primary function is to take in low-pressure, low-temperature refrigerant vapor from the evaporator and compress it into a high-pressure, high-temperature vapor. This process not only increases the pressure but also significantly raises the temperature of the refrigerant, enabling it to release heat efficiently when it reaches the condenser.

The compressor is often thought of as the "heart" of the heat pump system because it circulates the refrigerant through the system, allowing the cycle to continue. After compression, the high-temperature refrigerant gas moves to the condenser, where it releases heat to the surroundings, thereby providing heating to the space being serviced. The efficiency of this heat exchange process hinges on the compressor effectively raising the refrigerant's temperature, which is crucial for optimal heat pump operation.