摘要: |
为研究变转速压缩机对复叠式热泵系统的影响,本文搭建了高温压缩机变转速的复叠式热泵实验台。实验研究了不同运行工况下系统排气温度、中间温度、制热量、功率及COP随高温压缩机转速的变化规律。结果表明:在冷凝温度为46℃,蒸发温度为-35~-10 ℃时,压缩机运行安全可靠;在冷凝温度为46 ℃,蒸发温度为-25 ℃,高温压缩机转速从1 200 r/min增至6 000 r/min,制热量平均提升2.76%×10-2 (r/min)-1,低温压缩机功率平均减少0.266 W/(r/min);COP随高温压缩机转速的增加呈先增大后减小的趋势,存在最大COP和对应的最佳高温压缩机转速。 |
关键词: 复叠式热泵 循环性能 变转速 COP 制热量 |
DOI: |
投稿时间:2019-05-12 修订日期:2019-08-23
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基金项目:天津市创新团队项目——食品冷链装置节能及储运新技术(TD12-5048)资助项目。 |
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Experimental Research on Performance of Cascade Heat Pump with Variable Rotation Speed of High-temperature Compressor |
Yang Yongan,Li Ruishen,Sun Zhili,Li Qinguo |
(Tianjin University of Commerce, Refrigeration Engineering Research Center of Ministry of Education of People’s Republic of China, Tianjin Key Laboratory of Refrigeration Technology, Tianjin Refrigeration Engineering Technology Center) |
Abstract: |
To study the effect of a variable rotation speed compressor on the performance of a cascade heat pump, an experimental platform was constructed. The changes of discharge temperature, intermediate temperature, heating capacity, power consumption, and Coefficient of Performance (COP) with different rotation speeds of a high-temperature compressor were studied experimentally. Experimental results demonstrated that the system operated safely and reliably under the condition of a condensing temperature of 46 °C and an evaporating temperature between -35 and -10 °C. As the high-temperature compressor speed varied from 1200 to 6000 r/min and the condensing temperature was 46 °C and the evaporating temperature -25 °C, the heating capacity increased by 129.7%, and the low-temperature compressor power decreased by 43.4%. In addition, the COP initially increased and then decreased with the increase of high-temperature compressor speed; there was a maximum COP and corresponding optimal high-temperature compressor speed. |
Key words: ascade heat pump cycle performance variable rotation speed COP heating capacity |