带中间排气阀涡旋式压缩机的数值研究，用于提升 VRF 年度性能

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-06 DOI:10.1016/j.ijrefrig.2024.10.005

Minghong Yang , Shuangquan Shao

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引用次数: 0

摘要

可变制冷剂流量（VRF）系统中涡旋压缩机的过压缩是提高系统效率的一个常见问题，因为它一年中的大部分时间都是在部分负荷条件下运行的。通过引入中间排气阀（IDV），在压缩过程中允许气体从压缩腔旁通到排气侧，可以消除过压缩损失。本研究分析了 IDV 压缩机压缩过程的特点，并根据经过验证的高保真涡旋压缩机模型讨论了 IDV 端口位置和端口大小对压缩机效率的影响。研究发现，与非 IDV 压缩机相比，IDV 压缩机能够在不同压缩比条件下调节气体旁路过程，并在更宽的压缩比范围内保持高效率。此外，还集成了 VRF 系统模型，以验证 IDV 压缩机对系统性能的改善。结果发现，VRF 系统在制冷条件下的性能得到了显著改善，IEER 提高了 23.9%，而在制热条件下，由于运行压缩比相对较高，性能改善有限。

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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Numerical investigation on scroll compressor with intermediate discharge valve for VRF annual performance promotion

Over-compression of scroll compressor in variable refrigerant flow (VRF) system is a common problem in improving system efficiency because it operates in part load conditions for most of the year. By introducing intermediate discharge valves (IDVs) to allow gas bypass from compression chamber to discharge side during compression process, the over-compression loss can be eliminated. In this study, the characteristics of compression process in IDV compressor are analysed and the effects of IDV port location and port size on compressor efficiency are discussed based on the validated high fidelity scroll compressor model. It is found that the IDVs could be able to adjust gas bypass process in different compression ratio conditions and maintain high efficiency over wider compression ratio range than that of non-IDV compressor. In addition, the VRF system model is integrated to verify the system performance improvement by IDV compressor. It is found that VRF system performance is significantly improved in cooling conditions with the IEER enhanced by 23.9 %, while limited improvement is obtained in heating conditions as the operating compression ratios are relatively higher.

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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.