Investigation on the flow characteristics through different discharge port in scroll compressor for electric vehicles

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-08-06 DOI:10.1016/j.ijrefrig.2024.08.003

Tian Yafen , Liu Zhixiang , Xia Yang , Jiang Ziqi , Li Kang , Liu Ni , Zhang Hua

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引用次数: 0

Abstract

Scroll compressor with short scroll profile length shows great potential in electric vehicles for its compact structure and better reliability, while shorter scroll profile results in less compression time and under-compression in most cases. To investigate the influence of discharge port structure on compressor performance, a three-dimensional transient model of scroll compressor for electric vehicle is established. The theoretical and experimental results exhibit good consistency within a deviation of 9.5 %. With this validated model, the effects of discharge port size and shape on compressor performance are studied respectively. When the circular discharge port diameter increases from 5.2 mm to 9.0 mm, the power consumption and discharge temperature can be reduced respectively by 5.82 % and 5.29 %. The discharge mass flow rate can be promoted by 1.09 %. The discharge pressure fluctuation and imbalance between the upside and downside chambers enhanced obviously. To further improve the discharge flow characteristics, different discharge port shapes were employed including waist-shaped, arc-shaped and composite-shaped port. Compared with 5.2 mm circular port, the power consumption with composite-shaped port reduces by 5.81 % and mass flow grows by 1.26 %. Results indicated changes in discharge port structure parameters have greater influence on power consumption rather than mass flow rate.

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电动汽车涡旋式压缩机不同排气口的流动特性研究

涡旋外形长度较短的涡旋压缩机因其结构紧凑和可靠性较高而在电动汽车中显示出巨大潜力，但较短的涡旋外形会导致压缩时间较短，在大多数情况下压缩不足。为了研究排气口结构对压缩机性能的影响，本文建立了电动汽车涡旋压缩机的三维瞬态模型。理论和实验结果显示出良好的一致性，偏差不超过 9.5%。利用这个经过验证的模型，分别研究了排气口尺寸和形状对压缩机性能的影响。当圆形排气口直径从 5.2 毫米增加到 9.0 毫米时，功耗和排气温度可分别降低 5.82 % 和 5.29 %。排出质量流量可提高 1.09 %。上下腔之间的排出压力波动和不平衡明显改善。为了进一步改善排气流动特性，采用了不同形状的排气口，包括腰形、弧形和复合形排气口。与 5.2 毫米的圆形端口相比，复合形端口的功耗降低了 5.81%，质量流量增加了 1.26%。结果表明，排气口结构参数的变化对耗电量的影响大于对质量流量的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Refrigeration-revue Internationale Du Froid 工程技术-工程：机械

CiteScore

7.30

自引率

12.80%

发文量

363

审稿时长

3.7 months

期刊介绍： The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.