Comparison of three kinds of air-source heat pump heat recovery units

Presents the characteristics and energy saving effects of part heat recovery unit, traditional total heat recovery unit and total heat recovery unit with two stage heat recovery devices in series, and focuses on the last one. It has the advantages of both part heat recovery unit and traditional total heat recovery unit, providing an effective way to solve the contradiction among water temperature, water quantity and refrigeration efficiency. Analyses the application characteristics of the three kinds of units in engineering.