Optimization of the span angle and location of vortex generators in a plate-fin and tube heat exchanger

Jang, Jiin Yuh; Hsu, Ling Fang; Leu, Jin Sheng

doi:10.1016/j.ijheatmasstransfer.2013.08.028

Cited by 83 publications

(21 citation statements)

References 22 publications

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“…0.34 million/ year . Jiin-Yuh Jang et al [14] conducted an analysis regarding the span angle and location of the vortex generators provided in a plate fin and tube heat exchanger with in-line and staggered arrangements. Block type vortex generators are mounted behind these tubes.…”

Section: Sunil Chamoli [12]mentioning

confidence: 99%

Review on Performance Analysis of Heat Exchanger.

Rajput¹,

Pathak²

2018

IJAR

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Section: Sunil Chamoli [12]mentioning

confidence: 99%

Review on Performance Analysis of Heat Exchanger.

Rajput¹,

Pathak²

2018

IJAR

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“…They claimed that the 30 ∘ wavy rectangular winglet vortex generators can improve the heat transfer rate with a moderate pressure loss penalty. The numerical investigations on the influences of the span angles 30 ∘ -60 ∘ and transverse locations 2-20 mm for vortex generators in a plate-fin-and-tube heat exchanger at Re = 400-1200 were reported by Jang et al [6]. He et al [7] presented the numerical investigations on heat transfer and pressure loss in a fin-and-tube heat exchanger with rectangular winglet vortex generators.…”

Section: Journal Of Thermodynamicsmentioning

confidence: 99%

The Influence of the Punched Delta Wings on Flow Pattern and Heat Transfer Characteristic in a Fin-and-Oval-Tube Heat Exchanger

Boonloi

2015

Journal of Thermodynamics

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3D numerical investigations are performed to study the heat transfer, friction factor, and thermal performance of a fin-and-oval heat exchanger with punched delta wings for a range of 500 ≤ Re ≤ 2500 (based on the hydraulic diameter). The influences of the punched angles, 20°, 30°, and 45°, flow directions, wing tips pointing downstream and upstream, and pitch ratios, 2, 3, 4, 5, and 6, are investigated. The results show that the use of the punched delta wings in the fin-and-oval-tube heat exchanger leads to an enhancement in the heat transfer and friction loss as compared to the plain fin for all cases (Nu/Nu0 and f/f0 higher than 1). The enhancements of the heat transfer and friction factor are around 1.01–1.22 and 1.37–2.65 times higher than the base case, respectively. The punched delta wings create the vortex flows through the test section that helps enhance the strength of the impinging flow on the tube walls. The impingement of the fluid flow is an important key to augment the heat transfer rate and thermal performance in the heat exchanger.

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“…In the other study related to the application of VGs in heat transfer, Lin et al [20,21] analyzed flow features of heat exchangers which are fitted with wave-type, annular and inclined formed VGs. In another research by Leu et al [22] thermal-hydraulic features of inlined and staggered plate fin-tube heat exchangers were studied through investigation of block styled VGs fitted behind the tubes, which indicated optimization of the VG's span angle and the VG's transverse place.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Enhancement and Pressure Drop for Fin-and-Tube Compact Heat Exchangers With Delta Winglet-Type Vortex Generators

Ghazanfari¹,

Wahid²

2018

FU Mech Eng

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Heat transfer rate, pressure loss and efficiency are considered as the most important parameters in designing compact heat exchangers. Despite different types of heat exchangers, fin-and-tube compact heat exchangers are still common device in different industries due to the diversity of usage and the low space installation need. The efficiency of the compact heat exchanger can be increased by introducing the fins and increasing the heat transfer rate between the surface and the surroundings. Numerous modifications can be applied to the fin surface to increase heat transfer. Delta-winglet vortex generators (VGs) are known to enhance the heat transfer between the energy carrying fluid and the heat transfer surfaces in plate-fin-and-tube banks, but they have drawbacks as well. They increase the pressure loss and this should be considered. In this paper, the thermal efficiency of compact heat exchanger with VGs is investigated in different variations. The angle of attack, the length and horizontal and vertical position of winglet are the main parameters to consider. Numerical analyses are carried out to examine finned tube heat exchanger with winglets at the fin surface in a relatively low Reynolds number flow for the inline tube arrangements. The results showed that the length of the winglet significantly affects the improvement of heat transfer performance of the fin-and-tube compact heat exchangers with a moderate pressure loss penalty. In addition, the results show that the optimization cannot be performed for one criterion only. More parameters should be considered at the same time to run the process properly and improve the heat exchanger efficiency.

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Optimization of the span angle and location of vortex generators in a plate-fin and tube heat exchanger

Cited by 83 publications

References 22 publications

Review on Performance Analysis of Heat Exchanger.

Review on Performance Analysis of Heat Exchanger.

The Influence of the Punched Delta Wings on Flow Pattern and Heat Transfer Characteristic in a Fin-and-Oval-Tube Heat Exchanger

Heat Transfer Enhancement and Pressure Drop for Fin-and-Tube Compact Heat Exchangers With Delta Winglet-Type Vortex Generators

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