热泵空调器冬季制热量衰减的试验研究

通过焓差试验台和热泵性能测试系统,对热泵空调器在冬季低温工况下的运行特性进行研究,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.试验结果表明,室外换热器结霜,压缩机性能降低、换热器前后空气焓差的减小是造成制热量衰减的主要原因;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...

Experimental Study on the Heating Capacity Decay of Heat Pump Air Conditioners in Winter

Using air-enthalpy test box and heat pump performance test system,evaluates the running performance under low temperature condition in winter.The curves of inlet and outlet pressure of the compressor,evaporation temperature,heat generation and COP are gained.The results show that the frosting on heat exchanger outside,the degradation of compressor performance and the reduction of air-enthalpy difference are main reasons to heat generation attenuation.The degree of frosting depends on the ambient temperature...