不同热泵工质低温制热性能的比较

Heating performance comparison of different heat pump refrigerants at low temperature

基于某品牌的涡旋压缩机搭建了实验装置。在蒸发温度为-25~0℃、冷凝温度为45℃的工况下,分别测试了R22,R134a,R410A,R1234ze,R1234yf在单级系统和补气系统中的性能。结果发现:R410A的制热量最大,R1234yf的排气温度最低,R1234ze的制热COP最大;相比单级系统,虽然补气系统压缩机功率略有增大,但可明显降低压缩机排气温度、提高制热量,制热COP最大提升29.3%。

Sets up an experimental device for a scroll compressor. Under the condition of evaporating temperature from - 25℃ to 0℃ and condensing temperature of 45 ~C, tests the performance of R22, R134a, R410A, R1234ze and R1234yf in single stage compression system and the vapor injection system respectively. The results show that R410A has the largest heating capacity, R1234yf has the lowest discharge temperature and R1234ze has the highest heating COP. Compared with the single stage compression system, though the compressor power of the vapor injection system increases slightly, it can significantly reduce the discharge temperature, increase the heating capacity and the maximum increase of heating COP is 29.3%.