Engineering application of surface water source heat pump for winter heating in Chongqing area

Tests the heating operating conditions of five surface water source heat pump projects in Chongqing area, and compares them with those of the air source heat pump and boiler heating mode. The results show that the heating coefficient of performance (COP) of the river water source heat pump unit reaches 2.8 to 5.3 and the heating energy efficiency ratio (EER) reaches 2.7 to 4.3, and the COP and EER of the lake water source heat pump system reach 4.4 and 3.0 respectively; the indoor temperature and relative humidity can be maintained about 20℃ and above 40% respectively; the improving rates in energy efficiency of a surface water source heat pump system for winter heating are respectively 8.0% to 72.0% and 18.0% to 87.9% compared with the air source heat pump and boiler heating, and energy saving is significant.