| 摘要: |
| 新型制冷剂R1234ze(E)因较低的GWP值备受制冷行业关注，其与R32的混合工质作为热泵系统制冷剂的研究也在逐步展开，本文以R1234ze(E)/R32（质量配比：27%/73%，命名为L-41b，GWP=493）混合工质为研究对象，在人工环境室中设计并搭建了空气源热泵测试系统，对比研究了L-41b与R410A在热泵系统中的性能系数COP、压缩机耗功、制热量、排气温度和循环压比。结果表明：当恒定冷凝温度，蒸发温度从5 ℃增加到13 ℃时，R410A和L-41b的COP偏差从8.6%缩小到2.8%。当恒定蒸发温度，冷凝温度从30 ℃提高到42 ℃时，L-41b的运行性能系数COP值的降幅小于R410A，变工况实验表明在相对高温区L-41b替代R410A具有较好的替代性能。 |
| 关键词: R1234ze(E)/R32 混合制冷剂 空气源热泵 运行工况 |
| DOI： |
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| 基金项目: |
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| Experimental Investigation of R1234ze(E)/R32 Replacing R410A in Heat Pump System |
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Wang Lulu1, Zhang Hua1, Qiu Jinyou2
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| (1.School of Energy and Power Engineering, University of Shanghai for Science and Technology;2.College of Ecological Environment and Urban Construction, Fujian University of Technology) |
| Abstract: |
| Nowadays, more and more attention is being paid to the new low Global Warming Potential (GWP) refrigerant R1234ze(E). Mixing this refrigerant with R32 has been studied in recent years. We focused on contrasting the actual performance of the R1234ze(E)/R32 mixture (mass ratio: 27%/73%, named L-41b, with a GWP value of 493) with R410A in a heat pump system. A test system of an air source heat pump was designed and built in an environmental chamber in order to compare the differences between L-41b and R410A under a wide range of working conditions. The compressor energy consumption (COP), heating capacity, refrigeration cycle pressure ratio, and discharge temperature of the compressor were discussed and compared with R410A under similar working conditions. The results shows that, in the variable-condition experiments, the COP deviation decreased from 8.6% to 2.8% when the evaporation temperature increased from 5℃ to 13℃ at a constant condensation temperature of 38℃. The COP deviation was minimized when the condensation temperature increased from 30℃ to 42℃ at a constant evaporation temperature of 5℃. The results further demonstrate that the L-41b mixture can be used to replace R410A in a heat pump system, particularly at relatively high cycle temperatures. |
| Key words: R1234ze(E)/R32 mixed refrigerants air-source heat pump operating condition |
