R22热泵空调器低温环境下制热性能的分析

对热泵空调器在低温环境下的运行特性进行了理论和实验研究,获得了压缩机吸气/排气压力、蒸发温度、制热量、COP的变化曲线。实验结果表明,室外换热器结霜是造成制热量衰减最主要的原因;结霜的程度,不但与环境气温有关,还受相对湿度的影响;适合定频机正常工作的环境温度应该在-5℃以上。模型的计算结果基本与实验结果吻合。

Analysis of Heating Performance on Low Temperature Condition of Heat Pump Air-conditioner Using R22

The theoretical and experimental study of the effects of low temperature condition on the performance of heat pumps has been conducted.The curve of inlet and outlet pressure of the compressor,evaporation temperature,heat generation and COP was brought out.The results show that the frosting on heat exchanger outside is the main reason on heat generation attenuation.The degree of frosting depends on the ambient temperature and humidity.The constant-speed air conditioner should be working on the environment ex...