中文摘要：

为了研究跨临界CO2热泵系统外界因素对系统性能的影响规律,在自行搭建的实验台上通过改变冷却水体积流量、冷却水进口温度和环境温度研究系统性能变化,分析CO2质量流量、压比、制热量和制热系数（COPh）等系统参数的变化趋势,研究压缩机绝热效率和换热器热交换完善度对制热系数的影响.在测试工况范围内,实验结果表明：当冷却水体积流量增加或冷却水进口温度降低时,CO2质量流量、压比和压缩机功率减少,制热量和制热系数增加;当环境温度升高时,CO2质量流量和制热量增加,压比和压缩机功率基本不变,制热系数增加;压缩机绝热效率与气体冷却器的热交换完善度成为制约制热系数提高的2个重要因素.

英文摘要：

A prototype of heat pump was developed in order to analyze the effects of outside factors on transcritical CO2 heat pump system performance.The system performance was investigated by changing volume flow rate or inlet temperature of cooling water,and ambient temperature.Trends of systematic parameters such as CO2 mass flow rate,pressure ratio,heating capacity and heating coefficient of performance（COPh） were analyzed.The effects of compressor isentropic efficiency and heat transfer effectiveness of gas cooler on COPh were considered.The experimental results for the test conditions showed that CO2 mass flow rate,pressure ratio and compressor power consumption reduced,heat capacity and COPh increased when cooling water volume flow rate increased or inlet temperature decreased.When ambient temperature increased,CO2 mass flow rate and heat capacity had an increase,pressure ratio and compressor power consumption were almost same,and COPh increased.The compressor isentropic efficiency and heat transfer effectiveness of gas cooler were two key factors to increase COPh.