用一种新的被动式技术改善换热器的热性能

Q3 Environmental Science
Manar Hameed, H. Mohammed, M. R. Abdullah
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引用次数: 0

摘要

本研究将振荡技术应用于带挡板的多管换热器中。研究了换热器(HE)中的努塞尔数在各种操作条件下,雷诺数(Re=205-3200)和振荡流雷诺数(RE0=0-3800)。结果表明,管侧Nusselt数显著增强,在最大振荡和流速下,传热增强了Nu.5倍,在Re=1500和Reo=3800时,传热增强最大Nu=180。当Re>1000时,流速对传热增强的影响比振荡流大1.25。还对热交换器TH的热性能进行了评估。TH随着流速的增加而降低,由于混合强度的增加,ΔP的增加,产生振荡流。在Re=205,Reo=1500时,获得了热性能的高值,TH=4.5。根据文献,该TH值表明传热增强显著改善。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Improving the Thermal Performance of a Heat Exchanger using a New Passive Technology
In this study, the oscillation technique was applied in a multi-tube heat exchanger with baffles. The Nusselt number was investigated in the heat exchanger (HE) over a wide range of operating conditions, Reynolds number (Re =205-3200), and oscillatory flow Reynolds number (Reo =0-3800). The results showed a significant enhancement in the tube-side Nusselt number, Nu. 5-fold heat transfer enhancement was achieved at maximum oscillatory and flow rates, the maximum Nu=180 at Re =1500 and Reo=3800. The flow rate had more impact on the heat transfer enhancement than the oscillatory flow by 1.25 when Re>1000. The thermal performance of the heat exchanger, TH, was also evaluated. TH decreased with the increasing flow rate and oscillatory flow due to the increase in the ΔP due to the increase in the mixing intensity. A high value of the thermal performance, TH=4.5, was achieved at Re=205, Reo=1500. According to the literature, this TH value indicated a significant improvement in heat transfer enhancement.
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来源期刊
CiteScore
1.50
自引率
0.00%
发文量
56
审稿时长
8 weeks
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