空气源热泵蒸发器并联除霜特性研究  

Defrosting characteristics of air source heat pump with evaporators in parallel

作　　者：牛建会[1] 梁征 吕天舒 王海超 Niu Jianhui;Liang Zheng;Lu Tianshu;Wang Haichao(Department of Energy Engineering,Hebei University of Architecture)

机构地区：[1]河北建筑工程学院能源工程系

出　　处：《制冷与空调》2025年第2期21-25,29,共6页Refrigeration and Air-Conditioning

基　　金：河北省高等学校科学技术研究项目(ZD2022116);2023年河北省级在读研究生创新能力培养资助项目(CXZZSS2023161);2023年度校级研究生创新基金项目(XY2023054)。

摘　　要：提出一种蒸发器并联除霜方式,通过阀门切换实现空气源热泵除霜同时不间断制热运行。采用有限时间稳态热力学方法,建立空气源热泵蒸发器结霜/除霜的热质传递仿真模型,研究制冷剂液体的热力学性能与霜层物理性能之间的关系,特别是结霜/除霜动态过程随室外空气参数的变化,获得结霜/除霜过程空气源热泵的运行性能。结果表明:在除霜过程中,蒸发器翅片上霜层质量呈现周期性变化,空气源热泵的制热量和制热COP变化不大,分别维持在5.40 kW和2.82左右。An evaporator in parallel defrosting method is proposed, which achieves uninterrupted heating operation of air source heat pump while defrosting through switching valves. The finite-time steady-state thermodynamic method is adopted to establish the simulation model of heat and mass transfer of frosting/defrosting for evaporators of air source heat pump. The relationship between thermodynamic properties of refrigerant liquid and physical properties of frost layer is studied, especially the variation of the dynamic process of frosting/defrosting with the outdoor air parameters, so as to obtain the operation performance of the air source heat pump in the frosting/defrosting process. The results show that during the defrosting process, the mass of the frost layer on the evaporator fins changes periodically, but the heating capacity and heating COP of the air source heat pump have little change, which basically maintain at about 5.40 kW and 2.82, respectively.

关 键 词：空气源热泵 结霜 除霜 过冷 制热性能 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]