A numerical investigation of the geometric effects on the performance of plate finned-tube heat exchanger

Lu, Chi-Wen; Huang, Jeng-Min; Nien, W.C.; Wang, Chi-Chuan

doi:10.1016/j.enconman.2010.10.026

Cited by 67 publications

(26 citation statements)

References 13 publications

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“…Double segmental baffles [5] still have some fouling issues. Helical baffles [18][19][20][21][22][23][24][25][26][27][28][29] are hard to be mechanically cleaned. Therefore it is always highly demanding to seek new heat transfer enhancement techniques, maximize HX efficiency, and propose novel design.…”

Section: Introductionmentioning

confidence: 99%

“…To date, researchers have successfully invented different novel shell-and-tube heat exchangers, like annular orifices [3], rod baffles [4], double segmental baffles [5], ring supports [6], flower-like baffles [7,8], conical strip inserts [9], trefoil-hole baffles [10], rod baffles with arc cuts [11], twisted oval tubes [12,13], helical tubes [14], helical coiled tubes [15], porous structures [16,17], and helical baffles [18][19][20][21][22][23][24][25][26][27][28][29]. Those replete of new inventions were proposed to enhance heat transfer (inserts), or to reduce power consumption (rod baffles), or to increase cost-efficiency (twisted or helical tubes), or to simplify manufacturing/assembling process (ring supports).…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation on a novel shell-and-tube heat exchanger with plate baffles and experimental validation

Yang

Liu

2015

Energy Conversion and Management

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical investigation on a novel shell-and-tube heat exchanger with plate baffles and experimental validation

Yang

Liu

2015

Energy Conversion and Management

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“…A multiple correlations of friction factor and Nusselt number for large tube diameter and large number of rows have been proposed by Xie at el [11]. The g eometric effects on the pe rformance of plate finned-tube heat exchanger with different fin pitch, tube pitch, fin thickness, and tube diameter have been investig ated by Lu et al [12 ]. From their work it is noticed that, with a fixed inlet frontal velocity there is enhancement in heat transfer by decrea sing tube diameter.…”

Section: Literature Reviewmentioning

confidence: 99%

Numerical Investigation of Finned-tube Heat Exchanger with Circular, Elliptical & Rectangular Tubes

Hasan

Mondal

2020

1790-5044

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A three dimensional numerical study has been conducted on fi nned-tube heat exchanger with multiple rows of tubes using ANSYS (Fluent). The objective of this study is to numerically investigate finned tube heat exchanger with different ty pe of tubes such as circular, elliptical an d rectangular tubes. As circular tubes has much pressure drop so elli ptical and recta ngular tubes has been introduced i n order to re duce pressure drop. As well as heat transfer has also been examined. The finite volume bas ed CFD code ANS YS Fluent 16.2 is used to calculate the flow and temperature fields and by applying SIMPLEC algorithm. At low velocity of air and water, nothin g significant occurred for the co mbination of tubes. At high velocit y in maximum tube combination there was heat transfe r (HT) enhance ment and pressure drop reduction when compared with circular tubes only in case of air. When the combinations of circular, elliptical and rectangular tubes has been compared with circular tube heat exchanger (CTHX) heat transfer reduces as well as pressure drop (PD) also reduces for air. In case of water vapor HT and PD behaves the same. When those combinations has been compared with elliptical tube HX, for air in some cases heat transfer remains same and on other case it increases. For pressure drop in case of air, in some cases it reduces and on other cases it reduces. For elliptical tube HX for the fluid water vapor HT and PD both remains same or reduces. This work has not been with conducted any numerical simulation on rectangular Heat exchanger reason behind i t there isn't an y existence of this kind of h eat exchanger. However, it could be nu merically conducted to examine the results between those combination and rectangular heat exchanger.

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“…The shearstress transport (SST) κ-ω model is used to model the Reynolds stress terms and achieve closure of RANS equations. In the literature, researchers [12][13][14] have used different turbulence models as well as laminar flow assumption to model interrupted fin geometries and there is no clear evidence of one particular model being superior to others. In this study the κ-ω (SST) model provided best accuracy for the model validation runs with wavy fin and was retained for HSW fin modeling as well.…”

Section: Solver and Boundary Conditionsmentioning

confidence: 99%

Numerical Analysis of Fluid Flow and Heat Transfer in Wavy and Hybrid-Slit-Wavy Fin-and-Tube Heat Exchangers

Mohanta

Joardar

Esformes

et al. 2019

Science and Technology for the Built Environment

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This numerical study pertains to characterizing flow and heat transfer interactions for an interrupted fin design with wavy profile in compact tube-and-fin heat exchanger. Although designs with similar concept is prevalent in the HVAC&R industry not much literature exists on the subject combining wavy fins with periodic interruptions. Presently sinusoidal wavy fin is combined with slit fins to investigate thermalhydraulic performance relative to an un-interrupted fin design. This fin is referred to as Hybrid Slit Wavy (HSW) fin in this work. Commercial Computational Fluid Dynamics (CFD) software is used for 3D numerical solution of the complete Navier-Stokes and energy equations in the heat exchanger to study flow physics and predict performance. The modeling approach is first validated with available test data from the literature on a wavy (Herringbone profile) fin heat exchanger. The predicted friction factor was within 12% and the Colburn j-factor was within 7% of the reported test data over a Reynolds number range of 350-6500. In the case of the HSW fin it was found that the air-side heat transfer is enhanced by about 20-39% relative to the baseline un-interrupted fin with an associated pressure drop penalty of 20-38%. The area goodness factors of the HSW fins are up to 4 % higher compared to the wavy fins at various operating conditions indicative of favorable trade-off. It is further established that the local flow pattern including boundary layer modifications, wake structures and enhanced flow mixing correlates strongly with local Nusselt number distribution.

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A numerical investigation of the geometric effects on the performance of plate finned-tube heat exchanger

Cited by 67 publications

References 13 publications

Numerical investigation on a novel shell-and-tube heat exchanger with plate baffles and experimental validation

Numerical investigation on a novel shell-and-tube heat exchanger with plate baffles and experimental validation

Numerical Investigation of Finned-tube Heat Exchanger with Circular, Elliptical & Rectangular Tubes

Numerical Analysis of Fluid Flow and Heat Transfer in Wavy and Hybrid-Slit-Wavy Fin-and-Tube Heat Exchangers

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