Effect of four components ratios on performance of auto-refrigerating cascade system

doi:10.11949/j.issn.0438-1157.20151155

CIESC Journal ›› 2016, Vol. 67 ›› Issue (5): 1830-1836.DOI: 10.11949/j.issn.0438-1157.20151155

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Effect of four components ratios on performance of auto-refrigerating cascade system

RUI Shengjun^1,2, ZHANG Hua², DONG Bin¹, LIANG Kunfeng¹

1 Vehicle & Transportation Engineering Institute, Henan University of Science and Technology, Luoyang 471023, Henan, China;
2 Institute of Refrigeration Technology, Shanghai University of Science and Technology, Shanghai 200093, China

Received:2015-07-20 Revised:2016-01-22 Online:2016-05-05 Published:2016-05-05
Supported by:
supported by the National Natural Science Foundation of China (51176124), the Key Projects of Henan Province (152102210279), the Outstanding Scientific Research Project of Henan Colleges and Universities (15A470001, 14A470013) and the Youth Science Foundation of Henan University of Science and Technology (2015QN014).

自复叠制冷系统4种组分配比性能

芮胜军^1,2, 张华², 董彬¹, 梁坤峰¹

1 河南科技大学车辆与交通工程学院, 河南洛阳 471023;
2 上海理工大学制冷技术研究所, 上海 200093

通讯作者: 芮胜军
基金资助:
国家自然科学基金项目(51176124);河南省重点攻关项目(152102210279);河南省高等学校重点科研项目(15A470001,14A470013);河南科技大学青年科学基金项目(2015QN014)。

Abstract

Abstract:

An auto-refrigerating cascade cycle has some unique advantages for small refrigeration units, for which it has a wide range of operation temperatures from 77 K for nitrogen liquefaction to 230 K for conventional refrigeration. For the three-level auto-refrigenerating cascade system, effect of the components ratios of non-azeotropic mixture as a medium on the performances was investigated. Through the experimental comparisons of the performance of compressor and the cooling performance of evaporator, refrigerant mixtures of R600a, R23 and R14 with four ratios of 35/35/30, 35/30/35, 30/35/35 and 35/25/40 were designed, of which all the conditions of evaporator were approximate. The evaporation temperature for the ratio of 35/30/35 was lower than others. For this auto-refrigerating cascade system, its evaporator temperature can be as stable as down to 175 K under conditions of 60 W cooling load and 180 K of designed evaporation temperature. Based on the experimental study on the performances of the two compositions under different cooling loads, the highest COP values of 8.47% and 14.4% for the ratios of 35/30/35 and 35/35/30 were achieved, respectively.

Key words: auto-refrigerating cascade system, R600a/R23/R14, composition ratio, non-azeotropic, mixtures

摘要：

自动复叠制冷在小型制冷低温装置中有较强的应用优势,它能制取氮气液化温度77 K到常规单机压缩制冷温度230 K温区。针对三级自动复叠制冷系统非共沸混合制冷工质不同组分配比进行实验研究,对比分析了R600a、R23和R14混合制冷剂4种组分配比35/35/30、35/30/35、30/35/35和35/25/40,根据压缩机的运行工况和蒸发器的降温特性可以得到4种配比的各项运行性能参数比较接近,组分配比35/30/35的蒸发温度较低。蒸发器设计冷负荷为60 W,设计蒸发温度为180 K,低温冷柜内的蒸发温度最低可以达到并稳定在175 K。根据两种组分配比35/35/30和35/30/35在不同冷负荷时的蒸发器制冷特性实验研究,组分配比35/30/35的最高COP为8.47%;组分配比35/35/30的最高COP为14.4%。

关键词: 自复叠制冷系统, R600a/R23/R14, 组分配比, 非共沸, 混合工质

CLC Number:

TB657.3

RUI Shengjun, ZHANG Hua, DONG Bin, LIANG Kunfeng. Effect of four components ratios on performance of auto-refrigerating cascade system[J]. CIESC Journal, 2016, 67(5): 1830-1836.

芮胜军, 张华, 董彬, 梁坤峰. 自复叠制冷系统4种组分配比性能[J]. 化工学报, 2016, 67(5): 1830-1836.

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Effect of four components ratios on performance of auto-refrigerating cascade system

自复叠制冷系统4种组分配比性能

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