洗浴废水中含有大量废热，作者提出了通过大温差热泵机组最大限度地回收洗浴废水热能，机组额定设计工况为：蒸发器侧洗浴废水进、出温度分别为30℃和6℃，冷凝器侧自来水进口温度为10℃，制取热水出口温度为45℃，最大制热系数（COP）理论计算值为4.9。本文通过实验研究了自来水进口温度、热水出口温度及洗浴废水入口温度对热泵机组制热性能的影响。实验结果表明，在额定设计工况下，整体机组COP为5.0。当自来水进口温度从5℃升高到15℃，整体机组COP从5.0降低到3.85，但如果自来水进口温度低于10℃，整体机组的COP高于4.5；当热水出口温度从40℃变化到50℃时，整体机组COP从5.3逐渐减小到4.9；当洗浴废水进口温度从30℃升高到35℃时，整体机组COP从4.8升高到4.95。

Bathing wastewater contains a large amount of waste heat. A large temperature difference heat pump unit was proposed to maximize the recovery of heat energy from bathing wastewater by the authors. The rated design conditions of the unit are: the entry and exit temperatures of evaporator side bath wastewater are 30℃ and 6℃, respectively. The inlet temperature of tap water on the side of the condenser is 5℃, the outlet temperature of hot water is 45℃, and the theoretical calculation value of the maximum coefficient of heating performance (COP) is 4.9. In this paper, the effects of inlet temperature of tap water, outlet temperature of hot water and inlet temperature of bath wastewater on thermal performance of heat pump unit were studied experimentally. The experimental results show that the COP of the whole unit is 5.0 under the rated design conditions. When the inlet temperature of tap water increases from 5℃ to 15℃, the overall unit COP was reduced from 5.0 to 3.85. But if the inlet temperature of tap water is less than 10℃, the overall unit COP is higher than 4.5; When the temperature of the hot water outlet changes from 40℃ to 50℃, the overall unit COP gradually decreases from 5.3 to 4.9. And when the inlet temperature of bath waste water rises from 30℃ to 35℃, the overall unit COP rises from 4.8 to 4.95.

国家自然科学基金