Numerical study of laminar flow and heat transfer characteristics in the fin side of the intermittent wavy finned flat tube heat exchanger

Duan, Fei; Song, KeWei; Li, HouRan; Chang, Li-Min; Zhang, Yongheng; Wang, Liang-Bi

doi:10.1016/j.applthermaleng.2016.04.081

Cited by 31 publications

(14 citation statements)

References 26 publications

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“…Nascimento and Garcia [23] reported that flat tube with a shallow square dimple enhanced the heat transfer considerably. More recently, Duan et al [24] revealed that longitudinal and transversal vortices can be created by using intermittent wavy fins with the flat tube HE and producing great heat transfer enhancement. P. Wais [25] performed a three-dimensional simulation using ANSYS software with fixed inlet air velocity and fin spacing to analyse the effect of louver inclination angle of a car radiator having circular tubes.…”

Section: Introductionmentioning

confidence: 99%

Investigation of thermal-hydraulic performance in flat tube heat exchangers at various tube inclination angles

Adam¹,

Oumer²,

Alias³

et al. 2017

Int. J. Automot. Mech. Eng.

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The performance of compact fin-and-flat tube heat exchangers (HE) can be affected by many geometrical and processing factors and one of them is tube inclination angle. However, the effect of flat tube inclination angle on the thermal-hydraulic performance of the HE is not fully examined. This paper investigates the effects of flat tube inclination angles on heat transfer and pressure drop characteristics of fined flat tube HE when the tubes are deployed in in-line and staggered arrangements. A symmetric numerical method based on FLUENT software was carried out with six different tube inclination angles (0°, 30°, 60°, 90°, 120°, and 150°) in moderately high Reynolds number. From the results, it was observed that heat transfer coefficient increased with the augmentation of the tube inclination angle from 0 o to 90 o and decreased for 120 o and 150 o . With the increase of tube inclination angle, the average Nusselt number rose by 36.3%. This might be due to the reason that the tube surface area increases with the inclination angle, which also results in the largest increment of the pressure drop by 42.0%. Overall, the 90 o tube inclination angle showed the highest enhancement in heat transfer for both inline and staggered configurations with a maximum enhancement of 41.2% for in-line and 32.2% for staggered arrangements. However, the heat transfer enhancements were accompanied by high-pressure drop penalties of up to 44.2% and 42.6% for in-line and staggered arrangements, respectively. Therefore, inclining the tubes at 90 o is recommended where high heat transfer is required. On the other hand, 0 o tube inclination angle is recommended where pumping power is a crucial issue.

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Section: Introductionmentioning

confidence: 99%

Investigation of thermal-hydraulic performance in flat tube heat exchangers at various tube inclination angles

Adam¹,

Oumer²,

Alias³

et al. 2017

Int. J. Automot. Mech. Eng.

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“…Zhan et al (2016) experimentally investigated the distribution of the particles in the wavy fin-and-tube heat exchanger. Duan et al (2016) numerically studied on laminar flow and heat transfer in the fin side of the wavy finned flat tube heat exchanger. The effects of fin spacing, wave spacing, and wave amplitude on flow and heat transfer mechanisms were investigated.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Improvement in a Square Channel Heat Exchanger With Various Parameters of v-Wavy Plates

Jedsadaratanachai¹,

Boonloi²

2018

Frontiers in Heat and Mass Transfer

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Numerical examinations on flow and heat transfer behaviors in a square channel heat exchanger equipped with various configurations of V-wavy plate are performed. The pitch-to-channel height ratios, wavy height-to-channel height ratios and flow directions of the test section are investigated for the Reynolds number in the range of 100-1000 (laminar flow regime). The finite volume method is selected for the present investigation. The results are reported in terms of flow and heat transfer mechanisms in the channel. The thermal performance assessments of the square channel fitted with the V-wavy plate are also concluded. As the numerical results, the V-wavy plate can produce the swirling flow through the heating channel. The swirling flow disturbs the thermal boundary layer on the heat transfer surface that leads to enhance heat transfer rate and thermal efficiency.

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“…al [3], numerically studied on the flow and heat transfer characteristics in the fin side of the wavy finned flat tube heat exchanger are compared with experimental results. The influence of the fin spacing, the wave spacing, the wave amplitude and Reynolds number on the flow and heat transfer performances is investigated.…”

Section: Literature Reviewmentioning

confidence: 99%

Effect of Wavy Tube on Heat Transfer in a Concentric Tube Heat Exchanger

Bilawane¹,

Nimkar²,

Mungle³

et al. 2017

Icsesd-2017

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Numerical study of laminar flow and heat transfer characteristics in the fin side of the intermittent wavy finned flat tube heat exchanger

Cited by 31 publications

References 26 publications

Investigation of thermal-hydraulic performance in flat tube heat exchangers at various tube inclination angles

Investigation of thermal-hydraulic performance in flat tube heat exchangers at various tube inclination angles

Thermal Performance Improvement in a Square Channel Heat Exchanger With Various Parameters of v-Wavy Plates

Effect of Wavy Tube on Heat Transfer in a Concentric Tube Heat Exchanger

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