Optimization of distribution uniformity of evaporator orifice plate distributor

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-03-02 DOI:10.1016/j.ijrefrig.2025.02.022

Yue-Xi Dang , Shen Du , Xia Song , Ya-Ling He

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Abstract

The distribution uniformity of the two-phase refrigerant has an important impact on the heat transfer efficiency of the heat exchanger. Uneven liquid distribution leads to thermal imbalance in the heat exchanger, which will reduce the heat transfer efficiency. This study aims to improve the uniformity of two-phase refrigerant distribution and conducts optimization research on orifice plate distributors. It explores the effects of orifice arrangement, size, and cascade effect between multi-stage orifice plates on refrigerant distribution and flow pressure drop. This study proposes the Taguchi design method to obtain the sensitivity analysis of different influencing factors on distribution performance and uses the response surface method to obtain the influence of orifice-plate distributor structural factors on distribution performance. The results show that the uniformity of the optimized structure is improved by 86.0 %, and the pressure drop increases by only 22.9 %. A method coupling multi-stage distribution performance and flow resistance optimization is proposed to improve the uniformity of refrigerant distribution, and obtains an optimized combination plan combining the number of stages, pore diameter, and pore spacing.

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蒸发器孔板分布器分布均匀性的优化

两相制冷剂的分布均匀性对换热器的换热效率有重要影响。液体分布不均匀导致换热器内热平衡，降低换热效率。本研究旨在提高两相制冷剂分布均匀性，对孔板分布器进行优化研究。探讨了孔板布置、孔板尺寸和多级孔板间的级联效应对制冷剂分布和流压降的影响。本研究提出了田口设计法，获得了不同影响因素对分布性能的敏感性分析，并采用响应面法获得了孔板分布器结构因素对分布性能的影响。结果表明，优化后结构的均匀性提高了86.0%，压降仅提高了22.9%。为了提高制冷剂分布均匀性，提出了多级分布性能与流阻耦合优化的方法，得到了多级、孔径和孔间距相结合的优化组合方案。

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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.