复叠式空气源热泵相变蓄热器蓄放热效率试验研究

Experimental Study on Charge and Discharge Thermal Efficiency of Cascade Air Source Heat Pump Phase Change Regenerator

复叠式空气源热泵蓄能除霜方法是在常规的复叠式空气源热泵系统中添加翅片管式蓄热器,将低温级的多余的热能通过相变材料储存起来,实现同时低温级除霜和高温级供热的目的,在蓄能除霜阶段,其释热过程为多温位释热过程。试验研究在不同室外干球温度-9,-12,-15℃(即不同低温级蒸发温度)下蓄热器的蓄放热特性,结果表明,室外干球温度越低,蓄热效率越高,低温级总体?效率呈现上升趋势。

Cascade air source heat pump energy storage defrosting method is to add a finned tube heat accumulator in the conventional cascade air source heat pump system,which stores excess heat energy of the low temperature level through the phase change material,thereby achieving the purpose of simultaneous low temperature defrosting and high temperature heating.In the stage of energy storage defrosting,the heat release process is a multi-temperature heat release process.The heat storage and release characteristics of the accumulator were studied at different outdoor dry-bulb temperatures-9℃,-12℃,-15℃(namely,under evaporation temperatures of different low temperature levels)in the experiment.The results show that the lower the outdoor dry bulb temperature,the higher the heat storage efficiency,and the overall enthalpy efficiency of the low temperature level showed a ascending trend.