Experimental Study on Heat Transfer Characteristics of Thermosyphon with Methanol-Based Binary Working Fluid

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-12-27 DOI:10.1007/s40997-023-00738-7

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Abstract

Compared with the single working fluid, the binary mixture working fluid can further extend the operating temperature range and enhance the heat transfer performance of a thermosyphon. In this paper, an experimental test system was designed and implemented to study the heat transfer characteristics of the thermosyphon. Methanol employed as the base fluid, 10 kinds of binary mixtures were prepared by adding different volume fractions of deionized water and ethanol separately. The effects of filling ratio, heat flux, and working fluid type on the heat transfer characteristics of the thermosyphon were analyzed and discussed. Moreover, the start-up characteristics were also explored. The experimental result shows that the filling ratio has a significant impact on the performance of the thermosyphon, and the optimal filling ratio is about 30% in this study. The start-up times of the thermosyphon with different binary mixture working fluids remain consistently, which are in the range of 200–300 s. It is worth mentioning that the start-up time of methanol-based binary mixture working fluid with 5% DW is 200 s, which is nearly 33% earlier than that with 50% ethanol. The thermosyphon with methanol-based binary mixture working fluid containing 5% DW presents a reduction of 7.3 °C in the maximum temperature difference and a remarkable 57.0% decrease in thermal resistance when contrasted with the thermosyphon using methanol working fluid. The results of this paper have important significance for the practical application of methanol-based binary mixture working fluid.

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使用甲醇基二元工作流体的热流器传热特性实验研究

摘要与单一工作流体相比，二元混合工作流体可以进一步扩大热流器的工作温度范围，提高热流器的传热性能。本文设计并实现了一个实验测试系统，以研究热流器的传热特性。以甲醇为基液，分别加入不同体积分数的去离子水和乙醇，制备了 10 种二元混合物。分析和讨论了填充比、热通量和工作流体类型对热泵传热特性的影响。此外，还探讨了启动特性。实验结果表明，填充率对热吸附器的性能有显著影响，本研究中的最佳填充率约为 30%。不同二元混合工作流体的热力虹吸器启动时间保持一致，均在 200-300 秒之间。值得一提的是，含 5% DW 的甲醇基二元混合工作流体的启动时间为 200 秒，比含 50% 乙醇的启动时间提前了近 33%。与使用甲醇工作液的热流器相比，使用含 5% DW 的甲醇基二元混合物工作液的热流器的最大温差降低了 7.3 °C，热阻显著降低了 57.0%。本文的研究结果对甲醇基二元混合工作液的实际应用具有重要意义。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.