Fin-tube heat exchanger performance for different louver angles

Wais, Piotr

doi:10.7862/rm.2014.13

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…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. They found that heat transfer depends strongly on the louver angle and the maximum value of the outlet air temperature reaches at 45º.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, J. Dong et al [27] experimentally investigated the effects of fin pitch on multi-louvered flat tube HE using 20 types of HE having different fin pitches. More recently, 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. The heat transfer strongly depends on the louver angle and the maximum value of the outlet air temperature reaches at 45º louver inclination angle.…”

Section: Introductionmentioning

confidence: 99%

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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%

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.

View full text Add to dashboard Cite

show abstract

“…This is due to the fact that they are the simplest and cheapest. However, the wake region behind the circular tube reduces the heat transfer on downstream fin region [13]. The optimum heat transfer rate can be obtained by varying the geometrical parameters of the tubes.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Fluid Dynamic Analysis of Compact Fin-and-Tube Heat Exchangers for Automotive Applications

et al. 2018

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Flat tubes heat exchangers are commonly used in many industrial applications as a consequence of the distinctive geometrical characteristics of the flat tube compared with round tube. This paper aims to investigate the flow and heat transfer characteristics of laminar cross-flow forced convection in compact fin-and-flat tube heat exchangers. The experiment was performed to explore the influence of the tube inclination angle on the thermal hydraulic performance of the flat tube heat exchanger. Four flat tubes arranged in two aligned rows having the same longitudinal and transverse pitches have been examined in the range of Reynolds number between 1768.27 and 2259.46. A constant heat flux of 4169.63 W/m2 was applied at the inner surface of each flat tube. On the other hand, the numerical simulation is solved by ANSYS FLUENT for a two dimensional model with unstructured mesh and the results are compared against the experimental results. The numerical simulation results indicate that the average Nusselt number increased by 78.24 % for Reynolds number 1768.27. Besides that, for Reynolds number 1964.75 and 2259.46 the Nusselt numbers were increased by 75.89 % and 54.49%, respectively, compared to experimental results. Moreover, the pressure drop is increased 25 % and 83.38 % for both experimental and numerical simulation with respect to three Reynolds number. It was found that, the tube with 30° degree provides the higher heat transfer with Reynolds number 2259.46. This study could assist engineers in decisions regarding the application of compact fin-and-tube heat exchangers in the automotive field.

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Numerical analysis of the heat transfer and pressure drop of a wavy fin and Kammtail tube condenser: An investigative study

Erdem Şahnali,

Atayılmaz,

Gemici

2024

Case Studies in Thermal Engineering

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Fin-tube heat exchanger performance for different louver angles

Cited by 3 publications

References 11 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 and Fluid Dynamic Analysis of Compact Fin-and-Tube Heat Exchangers for Automotive Applications

Numerical analysis of the heat transfer and pressure drop of a wavy fin and Kammtail tube condenser: An investigative study

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