| 摘要: |
| PVT热泵系统是太阳能热泵与光伏光热（PVT）综合利用技术的结合，具有在同一套系统上分时输出热能、电能和冷量的热电冷三联供的特点，可以满足建筑多样化、分布式的能源需求。本文以单级压缩PVT热泵系统的夏季制冷性能为研究重点，对以PVT组件直接作为热泵系统冷凝器与外界环境进行辐射冷却换热和对流换热的制冷运行模式进行实验研究，论述了系统组成及工作原理、系统数学模型、性能评价方法，并分析了实验系统在不同气象条件下的制冷性能，对系统数学模型理论解进行实验验证。研究结果表明：单级压缩PVT热泵系统在夏季多种气象条件下均可实现制冷模式运行，且制冷性能良好、系统配置简单、长期稳定运行。在夏季夜间晴朗气象条件下，系统平均制冷COPc为2.8（制冷冻水）和2.3（制冰）；在夏季日间阴天工况，系统平均制冷COPc为2.37（制冷冻水），系统在夜间的制冷性能比日间约高20%。 |
| 关键词: PVT热泵 吹胀式PVT组件 天空长波辐射冷却 系统模型 |
| DOI： |
| Received:January 22, 2022Revised:February 16, 2022 |
| 基金项目:潍坊科技学院学科建设专项课题项目(2021XKJS41)、潍坊科技学院高层次人才科研启动资金项目(KJRC2020012)资助。 |
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| Experimental Research on Refrigeration Characteristics of PVT Heat Pump System with Single-stage Compression during Summer |
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Zhou Chao1,2, Wang Jingjing1, Zhang Jili2, Chen jianquan3
|
| (1.School of Architecture and Engineering, Weifang University of Science and Technology;2.Faculty of Infrastructure Engineering, Dalian University of Technology;3.Intertek Testing Services Shenzhen Ltd. Guangzhou Branch) |
| Abstract: |
| Photovoltaic thermal heat pumps are a comprehensive utilization technology that combines photovoltaic-driven heat pumps and solar thermal collectors, which have the characteristics of a tri-generation (heating, cooling, and electricity) to meet a building’s diversified and distributed energy demand. In this study, the refrigeration performance of a PVT heat pump system in summer was tested, with an emphasis on the long-wave radiative cooling and convective cooling between the PVT unit and the ambient under the refrigeration mode. The system composition, working principle, and performance evaluation method were introduced and analyzed in detail. The refrigeration performance was tested under ambient conditions. The experimental results showed that the PVT heat pump system met the building’s cooling demand in summer, and it demonstrated the benefits of considerable refrigeration performance, simplicity, and long-term stability. Under clear weather conditions at night in summer, the average COPc of the system was 2.9 (producing chilled water) and 2.3 (producing ice). In overcast conditions in summer daytime, the average COPc of the system was 2.37 (producing chilled water) and the refrigeration performance of the system at night was approximately 20% higher than that in the daytime. |
| Key words: PVT heat pump roll-bond PVT unit long-wave radiative cooling system model |
