Which components make up a typical heat pump system?

A typical heat pump system consists of the evaporator, compressor, condenser, and expansion valve. These components work together to transfer heat from one place to another, either from the air, ground, or water, depending on the type of heat pump.

The evaporator absorbs heat from the environment and converts the refrigerant from a liquid to a gas. The compressor then pressurizes this gas, raising its temperature. The hot gas flows into the condenser, where it releases the absorbed heat into the space being heated, causing the refrigerant to change back into a liquid. The expansion valve regulates the flow of refrigerant into the evaporator, allowing it to return to its low-pressure state and complete the cycle.

This process highlights the efficiency and versatility of heat pumps for heating and cooling, which is crucial in understanding their function and application in various environmental conditions. The other options represent components that do not make up a comprehensive heat pump system or are associated with different types of systems or appliances.