无霜空气源热泵系统冬季运行性能实验

为了解决传统空气源热泵系统冬季运行室外换热器结霜温度，提出了一种溶液除湿型无霜空气源热泵空调系统。该热泵系统在冬季可以无霜高效运行的同时夏季性能也有所提高。通过搭建该系统实验平台，研究了室外空气干球温度、湿度、供热水温度、供热水流量、溶液流量、溶液质量分数、室外空气流量等对冬季工况系统供热性能的影响，还研究了溶液流量、溶液温度、室外空气流量等对冬季工况系统再生性能的影响，得出了室外空气湿度、溶液质量分数对系统的供热性能影响较小，随着室外空气干球温度、供热水流量、溶液流量、室外空气流量等参数的升高和供热水温度的减小，系统供热性能逐渐增大最高可达3.11，而随着溶液流量、空气流量等参数的升高和溶液温度的减小，系统再生性能逐渐增大最高可达4.03，系统供热综合COP在实验工况相较逆循环除霜系统有所提升，实验验证了该系统适用于低温高湿地区。

Experimental research on new type of frost-free air source heat pump system in winter

This paper reports an experimental research of a new type of air source heat pump system in winter. This system can not only operate efficiently in winter, but also improve the performance in summer operation. Through constructing the heat pump system experimental platform, the effects of outdoor air dry bulb temperature, humidity, heat water temperature, heat water flow rate, solution flow rate, solution mass fraction and outdoor air flow rate in winter conditions on system supply heat model performance and the effects of solution flow rate, solution temperature and air flow rate in winter conditions on system regeneration model performance can be acquired. It is concluded that the supply heat model COP of air source heat pump air conditioning system increases with the decrease of heat water temperature, the increase of outdoor air dry bulb temperature, heat water flow rate, and solution flow rate. The effects of humidity and solution mass fraction on system supply heat model performance can be ignored. The regeneration model COP of air source heat pump air conditioning system increases with the decrease of solution temperature, the increase of air flow rate and solution flow rate. At the condition of experimental, the supply heat model COP of system can reach 3.11 and regeneration model COP can reach 4.03, more than the COP of traditional reverse cycle defrosting air source heat pump. The system heating integrated COP is improved in the test conditions compared with the reverse cycle defrosting system. The experiment proves that the system is suitable for low temperature and high humidity areas.