间接蒸发冷却技术对热回收式热泵性能影响研究
Influence of indirect evaporative cooling technology on performance of heat recovery heat pumps
摘要：
双热回收式热泵排风与新风之间的换热会导致排风中可利用的高品位能量减少、排风温度偏高，从而恶化冷凝器的工作环境。间接蒸发冷却热回收技术在夏季既可以降低新风温度，还可以保证排风温度不至于过高。实验研究了间接蒸发冷却技术在夏季标准工况和变工况下对热回收式热泵的性能影响。结果表明：在标准工况下，热泵机组的性能系数由1.98提升到2.57，能效提升达29.80%，系统的性能系数由2.17提升到3.61，能效提升达66.36%；在变工况下，平均系统性能系数提升达56%。
Abstract：
The heat exchange between the exhaust air and the outdoor air of the dual heat recovery heat pump will reduce the available high-grade energy in the exhaust air and increase the exhaust air temperature, thereby deteriorating the working environment of the condenser. Indirect evaporative cooling heat recovery technology can not only reduce the outdoor air temperature in summer, but also ensure that the exhaust air temperature is not too high. Experimentally studies the effect of indirect evaporative cooling technology on the performance of heat recovery heat pumps under standard and variable operating conditions in summer. The results show that under the standard operating condition, the coefficient of performance of the heat pump unit is increased from 1.98 to 2.57, and the energy efficiency is increased by 29.80%, and the system coefficient of performance is increased from 2.17 to 3.61, and the energy efficiency is increased by 66.36%. Under variable operating conditions, the average coefficient of performance of the system is increased by 56%.
Keywords:indirect evaporative cooling, heat recovery heat pump, heat exchange, exhaust air temperature, coefficient of performance