壳管式换热器的三维计算机模拟

Mariana Silva, Pedro Melo, Bernardo Penha, C. Ferreira, G. Maciel, Marcelo Braga dos Santos, S. Carvalho
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引用次数: 0

摘要

. 热交换器旨在增加流体之间的热量传递,无论流体之间是否有混合物,使热过程更有效并减少能源需求。本研究旨在分析带有挡板的管壳式换热器(回热器)内部的换热过程,并通过热力学第一定律的相关模型验证其效率。为此,分析了折流板的影响,作为引导流动的因素,扩大了冷流体与热流体之间的接触时间和面积,从而提高了交换效率。为了进行这项研究,使用ANSYS®Fluent软件进行了三维数值模拟。湍流模型为𝑘-𝜔𝑆𝑆𝑇,考虑了能量方程。本研究的主要目的是了解换热器的物理、流体力学和热现象,并评估所涉及的变量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
SIMULAÇÃO COMPUTACIONAL 3D DE UM TROCADOR DE CALOR CASCO E TUBO
. Heat exchangers are intended to increase heat transfer between fluids, with or without mixture between them, making thermal processes more efficient and reducing energy demand. This study aims to analyze the heat transfer that occurs inside shell-and-tube heat exchangers (recuperators) with baffles, to verify their efficiency through models related to the first law of thermodynamics. For this, the influence of the baffles was analyzed, as elements to direct the flow, expanding time and the area of contact between cold fluid with the hot one, thus allowing an increase in the exchange efficiency. To carry out this study, three-dimensional numerical simulations were performed using the ANSYS ® Fluent software. The turbulence model used was the 𝑘 - 𝜔 𝑆𝑆𝑇 and the energy equation was considered. The main objective of this study is to understand the physical, fluid dynamic and thermal phenomena of the heat exchanger, as well as to evaluate the variables involved.
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