Development of an energy test method for a dedicated water-heating pump

Modifications of the DOE test procedure for water heaters were made to include a dedicated water heating pump system equipped with a 50 gallon electric water heater tank. Also presented are laboratory tests and results which provided the basis for the test methods used. Tests included determination of recovery efficiency, standby loss, and water heater jacket loss under static or no-draw conditions and a dynamic test in which water is withdrawn according to a "typical-use' schedule. Energy requirements predicted by the proposed (static) procedure were in good agreement with measured energy consumption for the dynamic test in limited testing.