一种新型无霜空气源热泵热水器实验研究  

Experimental Research on a Novel Frost-free Air-source Heat Pump Water Heater System

作　　者：王志华[1] 王沣浩[2] 郑煜鑫[1] 李晶超[2] 郇超 王志洋[2] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]西安交通大学人居环境与建筑工程学院,西安710049

出　　处：《制冷学报》2015年第1期52-58,共7页Journal of Refrigeration

摘　　要：针对空气源热泵在低温环境下容易结霜问题,本文提出一种新型无霜空气源热泵热水器,其利用固体干燥剂较强的除湿特性,使室外空气含湿量低于结霜条件来实现无霜运行;其次,利用相变蓄热装置对冷凝余热进行回收,使之作为再生模式下的低温热源,对干燥剂进行再生,以保证系统的持续运行。本文通过实验验证了新型系统的可行性,并与传统除霜系统相比,在环境工况为0℃/80%下,其COP比热气旁通除霜系统和电除霜系统分别高7.25%和46.3%。Aiming to the frosting problem of air-source heat pump（ ASHP） at low temperatures,a novel frost-free air-source heat pump water heater（ ASHPWH） system is proposed in the paper,in which dehumidification of solid desiccant is used to reduce the humidity ratios of ambient air to realize frost-free operation. In order to keep the system working continuously,phase-change thermal storage is used to recycle the condensation heat that acts as a low temperature resource to regenerate the solid desiccant. The novel system was compared experimentally with conventional defrost system at a temperature of 0 ℃ and relative humidity（ RH） of 80%. The results show that the average COP of the system was increased by 7. 25% and 46. 3% in comparison with hot-gas bypass defrosting and electric resistance heating,which proves the feasibility of the novel system.

关 键 词：无霜空气源热泵 热水器 除湿 相变蓄热 

分 类 号：TQ051.5[化学工程] TK114[动力工程及工程热物理—热能工程]