| 摘要: |
| 本文采用双蒸发器闭式热泵干燥系统,通过实验分析了系统压缩机转速、膨胀阀开度及干燥温度对系统性能参数的影响,得出系统性能的变化规律。实验结果表明：随着压缩机转速的提高,系统的功耗上升,增幅为89.6%,制热量上升,增幅为11.4%,而COP下降,降幅为41.3%；随着膨胀阀开度的增大,系统的功耗下降,降幅约为5.2%左右,制热量上升,增幅为73.5%,COP提高,增幅为82.9%；随着干燥温度的提高,系统的功耗上升,增幅为38.1%,制热量上升,增幅为3.1%,而COP降低,降幅为25.3%。通过对研究结果的分析可知,降低热泵系统的干燥温度、压缩机转速,增大膨胀阀开度能够有效地降低系统功耗,提升系统性能。 |
| 关键词: 热泵干燥 热力性能 压缩机 膨胀阀 干燥温度 |
| DOI： |
| 投稿时间：2022-05-23 修订日期：2022-09-18
录用日期：2022-10-20 |
| 基金项目:2022年度河南省重大科技专项（221100320100），中原工学院青年骨干教师（2020XQG05），中原工学院科研团队项目（K2022TD004），中原工学院学科实力提升计划项目（GG202216，SD202240） |
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| Study on Thermal Performance of Closed Heat Pump Drying System |
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| Abstract: |
| In this paper, a double evaporator closed heat pump drying system is adopted. Through experiments, the effects of compressor speed, opening of expansion valve and drying temperature on system performance parameters are analyzed, and the variation rule of system performance is obtained. The experimental results show that as the compressor speed increased, power consumption increases by 89.6%, heat production increases by 11.4%, and COP decreases by 41.3%. As the opening of the expansion valve increased, the power consumption of the system decreases by about 5.2%, the heat production increases by 73.5%, and the COP increases by 82.9%. As the drying temperature increased, power consumption of the system increases by 38.1%, heat production increases by 3.1%, and COP decreases by 25.3%. Through the analysis of the research results, it can be seen that reducing the drying temperature and compressor speed of the heat pump system and increasing the opening of the expansion valve can effectively reduce the power consumption of the system and improve the system performance. |
| Key words: heat pump drying thermal performance compressor expansion valve drying temperature |
