| 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%。 |
| 关键词: 无霜空气源热泵 热水器 除湿 相变蓄热 |
| DOI： |
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| Experimental Research on a Novel Frost-Free Air-Source Heat Pump Water Heater System |
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Wang Zhihua1, Wang Fenghao2, Zheng Yuxin1, Li Jingchao2, Huan Chao1, Wang Zhiyang2
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| (1.School of Energy and Power Engineering, Xi’an Jiaotong University;2.School of Human Settlements and Civil Engineering, Xi’an Jiaotong University) |
| Abstract: |
| 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. |
| Key words: frost- free ASHP water heater dehumidification phase-change thermal storage |
