| 摘要: |
| R513A是由R134a和R1234yf混配而成的新型环保制冷剂，GWP100为574，远小于R407C。为测试机车空调系统中R513A替代R407C的可能性，本文针对两种制冷剂进行了制冷循环的理论计算与实验测试。结果表明：当不对原有系统进行改造，名义工况下R513A系统与R407C系统相比两者压比相近、制冷量降低28.1%、COP提高25.6%、排气温度降低18.24 ℃；R513A在原机充注条件下，COP显著提高，但制冷量下降显著，因此直接替代将造成制冷量无法满足热负荷要求，可通过换用具有更大输气量的压缩机以及改变R513A制冷剂充注量的方式来提高系统制冷量，从而满足车辆供冷需求。 |
| 关键词: 机车空调系统 制冷剂 不确定度 R513A R407C |
| DOI： |
| Received:July 01, 2022Revised:November 11, 2022 |
| 基金项目: |
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| Performance Study on R513A as Alternative to R407C in Locomotive Air-conditioning System |
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Zhao Jing1, Bao Rui2, Wang Xiaodong1, Feng Xuwei3, Wu Hansheng3, Zang Jianbin1, Wang Haiying1
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| (1.School of Mechanical and Energy Engineering, Tongji University;2.Chemours Chemistry Co. Ltd.;3.Shijiazhuang King Transportation Equipment Co. Ltd.) |
| Abstract: |
| R513A is a new environmental-friendly refrigerant blended with R134a and R1234yf, featuring a GWP100 of 574, which is significantly lower than that of R407C. To verify the applicability of replacing R407C with R513A in locomotive air-conditioning systems, theoretical calculations and experimental comparisons were performed for the two refrigerants. The results show that when the refrigeration system is not modified, the pressure ratios of the R513A and R407C systems are similar; the cooling capacity is reduced by 28.1%; the COP is increased by 25.6%, and the discharge temperature is reduced by 18.24 ℃ under nominal working conditions. Under the same conditions, the cooling capacity decreased, although the COP of the R513A system significantly increased; therefore, the drop-in replacement cannot meet the cabin heat load requirements of the vehicle driver. The cooling capacity of the system can be increased by switching to a compressor with a larger displacement and changing the R513A refrigerant charge to satisfy the cooling demand of the vehicle. |
| Key words: locomotive air conditioning system refrigerant uncertainty R513A R407C |
