直膨式太阳能热泵微通道集热/蒸发器制冷剂分布特性

doi:10.19912/j.0254-0096.tynxb.2021-0010

摘要/Abstract

摘要： 为研究微通道集热/蒸发器内制冷剂分布及对直膨式太阳能热泵系统性能的影响,搭建以丙烷（R290）为制冷剂的系统实验平台。基于实验数据,提出一种利用红外成像技术分析微通道集热/蒸发器内两相态制冷剂分布的方法,获得了电子膨胀阀开度、太阳辐射强度以及环境温度对集热/蒸发器内两相态制冷剂分布情况的影响特性。结果表明：当电子膨胀阀开度由20%增至60%时,集热/蒸发器的制冷剂分布参数（RDP）提高10.6%,系统性能系数（COP）从2.8升至5.5。较高的太阳辐射强度或环境温度可有效避免制冷剂回流现象。

关键词: 太阳能, 热泵系统, 红外成像, 丙烷, 微通道集热/蒸发器, 制冷剂分布

Abstract: In order to investigate the refrigerant distribution in a microchannel collector/evaporator and its influence on the performance of a direct-expansion solar-assisted heat pump （DX-SAHP） system, an experimental setup of the DX-SAHP system using propane （R290） was built. Based on the experimental data, a method using infrared imaging technology to analyze the two-phase refrigerant distribution in the microchannel collector/evaporator was proposed. The effects of the electronic expansion valve opening, the solar radiation intensity and the ambient temperature on the two-phase refrigerant distribution in the collector/evaporator were obtained. The results show that when the electronic expansion valve opening increases from 20% to 60%, the refrigerant distribution parameter （RDP） of the microchannel collector/evaporator increases 10.6%, and the system coefficient of performance （COP） has also a marked increase from 2.8 to 5.5. The higher solar radiation intensity or ambient temperature can avoid the occurrence of refrigerant backflow in the microchannel collector/evaporator.

Key words: solar energy, heat pump systems, infrared imaging, propane, microchannel collector/evaporator, refrigerant distribution

中图分类号:

TK519

孔祥强, 马廷东, 马善乐, 李瑛, 李见波. 直膨式太阳能热泵微通道集热/蒸发器制冷剂分布特性[J]. 太阳能学报, 2022, 43(8): 236-244.

Kong Xiangqiang, Ma Tingdong, Ma Shanle, Li Ying, Li Jianbo. DISTRIBUTION CHARACTERISTICS OF REFRIGERANT IN MICROCHANNEL COLLECTOR/EVAPORATOR OF DIRECT-EXPANSION SOLAR-ASSISTED HEAT PUMP[J]. Acta Energiae Solaris Sinica, 2022, 43(8): 236-244.

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