To obtain the applicability and operation superiority of the solar-air source heat pump hot water system in different regions

the operation performance and energy efficiency coefficient of the air source heat pump unit and solar collector unit were tested through experiments under typical conditions. Tianjin

Shanghai

Guangzhou

and Kunming were selected for cold

hot-summer and cold-winter

hot-summer and warm-winter

and temperate regions

respectively. With the consideration of Chinese habits on domestic hot water

the performance of the heat pump system was analyzed in different areas for a typical family with 3~5 persons. The annual performance factor (APF) of a hot water system in different regions is calculated based on the weighted annual meteorological data of different cities. It is concluded that the APF of the hot water system is 3.03

3.34

3.79

and 3.28 in cold

hot-summer and cold-winter

hot-summer and warm-winter

and temperate regions

respectively

and the annual contribution rate of solar energy in the four regions is 29.82%

32.07%

29.58%

and 38.62%

respectively. The APF of the combination system can reach 3.67

4.06

4.39

and 4.45

respectively.