Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
Heat pumps are devices that transfer heat from a colder area to a warmer area, using mechanical energy. They can be used for both heating and cooling purposes.
Refrigerators are appliances that remove heat from their interior compartments and release it into their surroundings, resulting in lower temperatures inside.
Heat engines are devices that convert thermal energy into mechanical work, typically by allowing heat to flow from a high-temperature region to a low-temperature region.
Coefficient of Performance (COP): COP is a measure of how efficiently a heat pump operates. It is defined as the ratio of desired output (heating or cooling) to the required input (electricity).