Experimental study of dedicated mechanical subcooling systems in flake ice machines

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-04-14 DOI:10.1016/j.ijrefrig.2025.04.011

Xian Lyu, Zhili Sun, Wenfu Zhang, Dongxia Wu

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引用次数: 0

Abstract

This paper proposes a method for enhancing the performance and production capacity of a flake ice machine by integrating a dedicated mechanical subcooling system with the existing setup. The optimal flow rate between different configurations of the ice-making system (IMS) and the dedicated mechanical subcooling system (DMS) was determined through theoretical analysis. A performance test bench was established for the flake ice machine to compare and analyze the optimal ice production when the dedicated mechanical subcooling system was activated and deactivated. The optimal ice-scraping cycle of the evaporation bucket of the flake ice machine was identified when the ice-making dry rate was 2.0. An economic analysis of the system was conducted. The results indicated that using an R404A scroll compressor for the IMS and an R134a piston compressor for the dedicated mechanical subcooling system, the optimal refrigerant flow rate of the IMS and the DMS was 3.0–4.0 and the optimal ice-scraping cycle was 26.7 s when the ice-making dry rate was 2.0. Applying the DMS resulted in a 7.4 % increase in the operational performance of the machine. And the payback period for incorporating the DMS was determined to be 0.76 years. Research demonstrates that the combination of a DMS with a flake ice machine system presents novel insights for enhancing the operational performance of the flake ice machine system and increasing its production output.

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片冰机专用机械过冷系统的实验研究

本文提出了一种通过将专用机械过冷系统与现有装置相结合来提高片冰机性能和生产能力的方法。通过理论分析，确定了制冰系统（IMS）和专用机械过冷系统（DMS）不同配置之间的最佳流速。为片冰机建立了一个性能测试台，以比较和分析专用机械过冷系统启动和停用时的最佳制冰量。当制冰干率为 2.0 时，确定了片冰机蒸发桶的最佳刮冰周期。对系统进行了经济分析。结果表明，当制冰干度为 2.0 时，IMS 使用 R404A 涡旋式压缩机，专用机械过冷系统使用 R134a 活塞式压缩机，IMS 和 DMS 的最佳制冷剂流量为 3.0-4.0，最佳刮冰周期为 26.7 秒。采用 DMS 后，机器的运行性能提高了 7.4%。采用 DMS 系统的投资回收期为 0.76 年。研究表明，DMS 与片冰机系统的结合为提高片冰机系统的运行性能和产量提供了新的思路。

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.