中文摘要：

本文设计了一种太阳能辅助空气源跨临界二氧化碳热泵空调热水系统，包括太阳能集热系统、二氧化碳热泵系统以及室内室外换热系统；针对春夏秋冬不同天气条件，可采用制热、制冷、热水、制热＋热水、制冷＋热水五种运行模式，实现热水和空调两大功能。利用搭建的太阳能辅助空气源跨临界CO2热泵热水与空调系统实验台，进行了水-水热泵与制冷循环系统、空气-水热泵与制冷循环系统以及太阳能辅助的热泵循环系统实验研究。结果表明：气体冷却器出口温度越低，系统的性能系数越高；蒸发温度的升高同样也会提高系统的性能系数；在冬季夜间利用太阳能集热系统作为辅助热源可有效提高蒸发温度，同时延长蓄热水箱使用时间，满足整个夜间供热需求。

英文摘要：

A solar assisted air source CO2-heat pump water heater and air-conditioning system was described in this paper. The system provides hot water, heating and refrigeration throughout the year. An experimental test rig for studying the solar assisted CO2 heat pump and refrigeration system was used to the water to water heat pump and refrigeration cycle, the air to water heat pump and refrigeration cycle, and the solar and air compound source heat pump cycle. The results show that the COP of the system increases with decreasing the outlet temperature of the gas cooler; increasing the evaporation temperature can also increase the COP; the use of solar collector as an assisted energy source can increases the evaporation temperature and enlarge the heating time.