Numerical investigation on effects of using segmented and helical tube fins on thermal performance and efficiency of a shell and tube heat exchanger

Amini, Reza; Amini, Mohsen; Jafarinia, Alireza; Kashfi, Mehdi

doi:10.1016/j.applthermaleng.2018.03.004

Cited by 53 publications

(10 citation statements)

References 29 publications

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“…The addition of fins accelerates heat transfer which is indicated by an increase in Reynolds number of 21.182% and Nusselt number of 16.57%. As a previous study mentioned, the rate of heat transfer, the Nusselt number of finned tubes, was relatively higher than that of ordinary tubes without fins [21]. A high Reynolds number will overcome the effect of fluid viscosity.…”

Section: Reynolds Number and Nusselt Number For Fluid Flowmentioning

confidence: 82%

Analysis of Longitudinal Finned Pipes in Cross-Flow Heat Exchanger

Wijayanto¹,

Soenarto²,

Triyono³

et al. 2021

IJHT

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In this case, the recovery of excess heat in the steel-making process becomes challenging to save energy effectively and efficiently. One way to help the process of heat recovery in the steel-making process is with a heat exchanger. This heat exchanger maximizes the production process work. However, in the application, the heat exchanger developed to date can still work optimally. Based on the literature study that has been done previously for the design of the heat exchanger, in this study, the addition of four longitudinal fins variations with the cross-flow flow was carried out. This research compares the heat exchanger performance finned pipes with pipes without fins design, where liquid and airflow rates are varied. This study evaluated whether the longitudinal fins configuration and the fluid flow rate affect the cross-flow heat exchanger performance. The results show that fins addition on the copper pipes increases the value of Nusselt number 2.56% in liquid fluid and 16.57% in air fluid and increases the NTU value of its effectiveness by 24.77%.

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Section: Reynolds Number and Nusselt Number For Fluid Flowmentioning

confidence: 82%

Analysis of Longitudinal Finned Pipes in Cross-Flow Heat Exchanger

Wijayanto¹,

Soenarto²,

Triyono³

et al. 2021

IJHT

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“…With the advent of high power computers and well-tested CFD solvers, a considerable amount of numerical investigations on heat transfer enhancement techniques has been taken place in the last two decades. Some of the investigations 53,55,63 used in-house solvers, whereas the majority of the others [42][43][44][45][46][47][48][49][50][51][52]54,[56][57][58][59][60][61][62] used commercially available CFD solvers. Fluid flow governing mass, momentum and energy equations were solved by discretizing the computational domain using numerical techniques such as finite difference method, finite volume method etc.…”

Section: Heat Transfer Enhancement In Heat Exchangers Employed With C...mentioning

confidence: 99%

Design and testing of energy-efficient heat exchangers for Newtonian and non-Newtonian fluids – A review

Jayesh

Mukkamala

John

2021

Proceedings of the Institution of Mechanical Engineers, Part A:

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Heat transfer enhancement, pumping power and weight minimization in enhanced heat exchangers has long been achieved by deploying tubes with internal surface modifications like microgrooves, ribs, fins, knurls, and dimples with and without tube inserts. This article presents a very extensive review of experimental and computational studies on heat transfer enhancement, which covers convectional and unconventional working fluids under different fluid flow conditions. Compound augmentation with tube surface modifications and inserts has yielded enhancements in the overall heat transfer coefficient of over 116% in the fully developed turbulent flow regime. Exotic fluids like nano-coolants deployed in spiral grooved mircofin tubes yielded 196% enhancement in tube side heat transfer rate for concentrations as low as 0.5% by volume, while the thermal efficiency index measuring the overall enhancement in relation to the pumping power was 75%. However, reviews that address the combined effect of unconventional fluids, surface modifications and tube inserts on the overall thermo-hydraulic performance of annular heat exchangers seem to be limited. Further, nano-coolants aren’t frequently used in the process industry. The goal of this study is to document and evaluate the impact of cost-effective and energy-saving passive enhancement techniques such as tube surface modifications, tube inserts, and annular enhancement techniques on annular heat exchangers used in the process industries with Newtonian and non-Newtonian fluids. This review should be useful to engineers, academics and medical professionals working with non-Newtonian fluids and enhanced heat exchangers.

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“…管壳式换热器广泛应用于国民经济的各个领域中 [1,2] , 对管壳式换热器结构和性能参数进行优化是提高其性能的重要措施. 一些学者采用经典传热优化方法分别以传热率 [3~6] 、效率 [5,7,8] 、压降 [4,6,7] 、总成本 [3,7,9] 、熵产率 [7,10,11] 、场协同数 [12,13] 等为优化目标对其进行了优化, 使得其性能得到显著提高.…”

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Constructal optimization for an organic fluid shell-and-tube heat exchanger based on entransy theory

Feng

Xie

et al. 2020

Sci. Sin.-Tech.

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Numerical investigation on effects of using segmented and helical tube fins on thermal performance and efficiency of a shell and tube heat exchanger

Cited by 53 publications

References 29 publications

Analysis of Longitudinal Finned Pipes in Cross-Flow Heat Exchanger

Analysis of Longitudinal Finned Pipes in Cross-Flow Heat Exchanger

Design and testing of energy-efficient heat exchangers for Newtonian and non-Newtonian fluids – A review

Constructal optimization for an organic fluid shell-and-tube heat exchanger based on entransy theory

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