The conversation between human and AI assistant.
What are the difference between heat pump, heat engine and refrigerator?
What are the most common applications for each of these devices?
Heat pumps are commonly used for heating and cooling indoor spaces, as well as hot water systems. Heat engines can be found in cars, airplanes, power plants, and other machinery that requires mechanical work. Refrigerators are used in homes and businesses to preserve perishable goods, as well as in some industrial applications.