HEAT TRANSFER FOR HEAT PUMP WATER HEATER

摘要

A water heater is provided that improves heat transfer between the coils of the heat exchanger of a refrigerant-based heating system and the water in the heater's water tank. Grooves can be added to the exterior of the water tank. The coils of the heat exchanger are positioned within the grooves on the exterior surface of the water tank. Additional features may also be used to further improve heat transfer. Methods for constructing such water heater are also provided.