Pressure and composition regulation of auto-refrigerating cascade system

doi:10.11949/j.issn.0438-1157.20160773

CIESC Journal ›› 2017, Vol. 68 ›› Issue (1): 329-335.DOI: 10.11949/j.issn.0438-1157.20160773

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Pressure and composition regulation of auto-refrigerating cascade system

RUI Shengjun^1,2, ZHANG Hua², LI Jian¹, WANG Zhiyuan¹

1 Vehicle & Transportation Engineering Institute, Henan University of Science and Technology, Luoyang 471003, Henan, China;
2 Institute of Refrigeration Technology, Shanghai University of Science and Technology, Shanghai 200093, China

Received:2016-06-06 Revised:2016-10-31 Online:2017-01-05 Published:2017-01-05
Contact: 10.11949/j.issn.0438-1157.20160773
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) and the Youth Science Foundation of Henan University of Science and Technology (2015QN014).

自复叠制冷系统压力和组分调节

芮胜军^1,2, 张华², 李健¹, 王志远¹

1 河南科技大学车辆与交通工程学院, 河南洛阳 471003;
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）；河南科技大学青年科学基金项目（2015QN014）。

Abstract

Abstract:

The hot-gas bypass control can effectively eliminate the harm of high pressure on auto-refrigerating cascade system, but it is useless for the regulation of mixed refrigerant composition.The four kinds of pressure and composition adjustment method with two bypass was put forward in connection with the characteristics of higher condensing pressure and exhaust temperature of three-stage auto-refrigerating cascade cycle.The condensing pressure was changed in regular fluctuations and the solenoid valve was opened and closed frequently for the hot-gas bypass regulation, and the refrigeration system was stable after 70 min.The cold lost seriously for vapor outlet bypass adjustment of phase separator Ⅱ, and the cold of refrigerant was discharged to the reservoir through the bypass line.The performance of the refrigeration system was very close to the vapor outlet bypass adjustment of phase separator Ⅰ and two phase separators, and the refrigeration cycle was stable after 30 min.The vapor outlet bypass adjustment of phase separator Ⅰ and two phase separators were the better pressure and composition regulation method of auto-refrigerating cascade cycle according to the study of the operating conditions of compressor and evaporator.

Key words: auto-refrigerating cascade system, R600a/R23/R14, composition regulation, bypass control, pressure regulation

摘要：

热气旁通调节可有效排除高压对自复叠制冷系统的危害，但对混合工质的组分没有调节作用。针对三级自复叠制冷系统冷凝压力和排气温度较高的特点，提出了带两路旁通的4种压力和组分调控方式。热气旁通调节时冷凝压力周期性波动变化较大，电磁阀开启较频繁，系统开机70 min后才能达到稳定状态。二级相分离器气相出口旁通调节时冷量损失较严重，低温工质的冷量通过旁通管路排放到膨胀容器。一级相分离器气相出口调节和两个相分离器气相出口同时调节时制冷系统的性能很接近，系统开机30 min后即可达到稳定运行状态。通过对压缩机和蒸发器运行工况检测，一级相分离器气相出口调节和两个相分离器气相出口同时调节为较好的自动复叠制冷系统压力和组分调控方式。

关键词: 自动复叠制冷, R600a/R23/R14, 组分调节, 旁通控制, 压力调节

CLC Number:

TB657.3

RUI Shengjun, ZHANG Hua, LI Jian, WANG Zhiyuan. Pressure and composition regulation of auto-refrigerating cascade system[J]. CIESC Journal, 2017, 68(1): 329-335.

芮胜军, 张华, 李健, 王志远. 自复叠制冷系统压力和组分调节[J]. 化工学报, 2017, 68(1): 329-335.

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Pressure and composition regulation of auto-refrigerating cascade system

自复叠制冷系统压力和组分调节

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