Investigation of Thermal Performance of Heat Exchangers of Inclined-Elliptic-Tube Bundle

IF 1.1 4区工程技术 Q4 ENGINEERING, MECHANICAL Journal of Thermophysics and Heat Transfer Pub Date : 2024-04-22 DOI:10.2514/1.t6941

Lahcene Bellahcene, A. Yousfi, Djamel Sahel, Abdelghani Laouer, Souici Mohammed, Müslüm Arıcı, Mohamed Teggar

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Abstract

Passive performance improvement of heat exchangers is cost-effective and crucial for energy efficiency as well as sustainability of thermal systems. In this paper, an investigation is presented on a compact configuration of heat exchanger composed of a bundle of inclined elliptical tubes. The effect of geometrical parameters on the thermal performance of the heat exchanger is investigated for two tube arrangements i.e. inline and staggered configurations. These parameters include longitudinal (SL/a = 3 to 6) and transversal (ST/a = 2.5 to 5.5) pitch ratios. A CFD commercial code is used for simulation of heat transfer and fluid flow. Computations are performed for the Reynolds number range Re = 300-1500. The outcomes indicate higher performance of the staggered arrangement when compared with the inline inclined tubes. The best thermal performance is observed for a staggered configuration with SL/a = 6, ST/a = 5.5 at Re = 1500. Furthermore, correlations are provided for Nusselt number for heat exchangers of inclined elliptic tubes.

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倾斜椭圆管束热交换器的热性能研究

提高热交换器的被动性能具有成本效益，对于提高热系统的能效和可持续性至关重要。本文研究了一种由倾斜椭圆管束组成的紧凑型热交换器。针对两种管束排列方式，即直列式和交错式，研究了几何参数对热交换器热性能的影响。这些参数包括纵向（SL/a = 3 至 6）和横向（ST/a = 2.5 至 5.5）间距比。模拟传热和流体流动使用的是 CFD 商业代码。计算的雷诺数范围为 Re = 300-1500。结果表明，与直列倾斜管相比，交错布置的性能更高。在 Re = 1500 时，SL/a = 6、ST/a = 5.5 的交错配置具有最佳热性能。此外，还提供了倾斜椭圆管热交换器努塞尔特数的相关数据。

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

Journal of Thermophysics and Heat Transfer 工程技术-工程：机械

CiteScore

3.50

自引率

19.00%

发文量

审稿时长

3 months

期刊介绍： This Journal is devoted to the advancement of the science and technology of thermophysics and heat transfer through the dissemination of original research papers disclosing new technical knowledge and exploratory developments and applications based on new knowledge. The Journal publishes qualified papers that deal with the properties and mechanisms involved in thermal energy transfer and storage in gases, liquids, and solids or combinations thereof. These studies include aerothermodynamics; conductive, convective, radiative, and multiphase modes of heat transfer; micro- and nano-scale heat transfer; nonintrusive diagnostics; numerical and experimental techniques; plasma excitation and flow interactions; thermal systems; and thermophysical properties. Papers that review recent research developments in any of the prior topics are also solicited.