Experimental and numerical investigation of thermal -hydraulic performance in wavy fin-and-flat tube heat exchangers

Dong, Junqi; Chen, Jiangping; Zhang, Wenfeng; Ji, Hu

doi:10.1016/j.applthermaleng.2010.02.027

Cited by 107 publications

(23 citation statements)

References 25 publications

(21 reference statements)

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“…Numerical simulations and experimental investigation of air flow and heat transfer over wavy fin were presented by Dong. The results show that the waviness amplitude has the distinct effect on the heat transfer and pressure drop of wavy fin [9].…”

Section: Introductionmentioning

confidence: 82%

On the Heat Transfer Enhancement of Plate Fin Heat Exchanger

Xue¹,

Ge²,

Du³

et al. 2018

Preprint

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Abstract:The plate fin heat exchanger is the compact heat exchanger applied in many industries because of its high thermal performance. To enhance the heat transfer of plate fin heat exchanger in further, three new kinds of wavy plate fins, namely perforated wavy fin, staggered wavy fin and discontinuous wavy fin are proposed and investigated by CFD simulations. The effects of key design parameters, including that of waviness aspect ratios, perforation diameters, stagger ratios and breaking distance are investigated, respectively, with the Reynolds number changes from 500 to 4500. It is found that due to the swirl flow and efficient mixing of fluid, the perforation, serration and breaking techniques are beneficial for the enhancement of heat transfer compared to the traditional wavy fin. At the same time, serration is beneficial to reduce the friction factor, and the breaking technique can reduce heat transfer area as well as enhance heat transfer performance. Through the performance evaluation criteria, the staggered wavy fin has an advantage over the small waviness aspect ratio compared to the perforated wavy fin. The maximum performance evaluation criteria (PEC), as high as 1.24, can be obtained for the perforated wavy fin at the largest waviness aspect ratio.

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Section: Introductionmentioning

confidence: 82%

On the Heat Transfer Enhancement of Plate Fin Heat Exchanger

Xue¹,

Ge²,

Du³

et al. 2018

Preprint

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“…The wavy surface can increase the strength of the flow in the heat exchanger. The combinations between wavy fin and the other types of the turbulators in the fin-and-tube heat exchanger had been reported by many researchers [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Flow Attack Angle for V-Wavy Plate on Flow and Heat Transfer in a Square Channel Heat Exchanger

Boonloi

Jedsadaratanachai

2018

Journal of Engineering

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Effects of flow attack angles of the V-wavy plate on flow and heat transfer in a square channel heat exchanger are investigated numerically. The V-wavy plates with V-tips pointing downstream and upstream called V-Downstream and V-Upstream, respectively, are examined for the Reynolds number in the range of 3000-10,000. The finite volume method with SIMPLE algorithm is selected to solve the present problem. The numerical results are presented in terms of flow and heat transfer visualization. The thermal performance analysis is also concluded in the form of Nusselt number ratio (Nu/Nu 0 ), friction factor ratio ( / 0 ), and thermal enhancement factor (TEF). The numerical result shows that the wavy plate can induce the swirling flow through the test section for all cases. The swirling flow disturbs the thermal boundary layer on the channel wall which is the reason for heat transfer enhancement. In range studies, the heat transfer rate increases around 3-6.5 and 2.8-6 times above the smooth channel for VDownstream and V-Upstream, respectively. The optimum TEF is found at = 20 ∘ and Re = 3000 to be around 2.09 for V-Upstream case.

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“…They summarized that the amplitude and length of the wavy fin are most important factors for heat transfer rate improvement. Dong et al (2010) also claimed that the waviness amplitude is a key for heat transfer rate augmentation, while the wavy fin profiles; triangular, sinusoidal and triangular round corner, have slightly effect for thermal performance. Gong et al (2013) reported the numerical investigation on the heat transfer characteristic in a wavy fin-and-tube heat exchanger with combined rectangular winglet pairs.…”

Section: Introductionmentioning

confidence: 99%

Laminar Flow and Heat Transfer in a Square Channel Installed with Inclined Wavy Surface

Boonloi¹,

Jedsadaratanachai²

2017

Journal of Mathematics and Statistics

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Laminar flow and heat transfer characteristic in a square channel heat exchanger installed with inclined wavy surface are investigated numerically. The inclined wavy surface is designed with the main the aim to help the installation, production and maintenance when using the inclined wavy surface in the heat exchanger. The finite volume method with SIMPLE algorithm is selected to solve the present problem. The effects of flow attack angle (α = 15°-60°) and Reynolds number (Re = 100-1200) on heat transfer, friction loss and thermal performance are considered. The numerical model is validated with the smooth channel. The grid independence of the computational domain is checked. The numerical results show that the heat transfer enhancement is around 1.9-7.5 times above the smooth channel. The optimum thermal performance is found at the flow attack angle of 45° around 2.35 at Re = 1200.

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Experimental and numerical investigation of thermal -hydraulic performance in wavy fin-and-flat tube heat exchangers

Cited by 107 publications

References 25 publications

On the Heat Transfer Enhancement of Plate Fin Heat Exchanger

On the Heat Transfer Enhancement of Plate Fin Heat Exchanger

Effect of Flow Attack Angle for V-Wavy Plate on Flow and Heat Transfer in a Square Channel Heat Exchanger

Laminar Flow and Heat Transfer in a Square Channel Installed with Inclined Wavy Surface

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