A parametric and comparative study on bare-tube banks and new-cam-shaped tube banks for waste heat recovery applications

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-01-01 DOI:10.1615/jenhheattransf.2024050060

Ngoctan Tran, Jane-Sunn Liaw, Chi-Chuan Wang

引用次数: 0

Abstract

The present study numerically examines the effects of tube diameter (12 to 35 mm), arrangement, pitch-to-diameter ratio (1.25 to 2.5), length (300 to 1500 mm), and passage number (1-4 passes) on the thermofluidic characteristics of cross-flow tube bundles. Especially, five new cam-shaped tubes are proposed in comparison with the conventional round tube. The air temperatures at the cold and hot side inlets are kept constant at 25 °C and 600 °C, respectively. The numerical method is verified by the existing experimental results. The findings show that a cam-shaped tube with an equal diameter (Cam_1818) is a promising tube for tube bundles, which apply in waste heat recovery. Indeed, it can offer the same minimum gap as that of the round tube; however, it improves the total thermal resistance up to about 28% and enhances the heat transfer rate up to an average of 42.3% compared to that of the round tubes at the same pumping power.

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废热回收应用中裸管组和新凸面形管组的参数和比较研究

本研究通过数值方法研究了管径（12 至 35 毫米）、排列方式、节径比（1.25 至 2.5）、长度（300 至 1500 毫米）和通道数（1 至 4 通）对横流管束热流体特性的影响。与传统的圆管相比，特别提出了五种新型凸轮管。冷侧和热侧入口的空气温度分别恒定为 25 ℃ 和 600 ℃。现有的实验结果对数值方法进行了验证。研究结果表明，直径相等的凸轮管（Cam_1818）是一种很有前途的管束管，适用于余热回收。事实上，它可以提供与圆管相同的最小间隙；但是，在相同的泵功率下，它比圆管的总热阻提高了约 28%，传热率平均提高了 42.3%。

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

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.