Performance analysis and flow visualization in a round tube heat exchanger inserted with wavy V-ribs

Jedsadaratanachai, Withada; Boonloi, Amnart

doi:10.1177/1687814017724091

Cited by 9 publications

(9 citation statements)

References 34 publications

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“…The air velocity is presented in term of the Reynolds number based on the hydraulic diameter of the HESC. The Reynolds number can be written as equation (1).…”

Section: Mathematical Foundation Numerical Method Assumption and Bmentioning

confidence: 99%

“…The generation of the vortex flow will disturb the thermal boundary layer that is the important reason for the augmentation of the heat transfer ability and thermal efficiency. 1,2 The investigation on heat transfer ability and thermal efficiency in the heat exchangers can be done both experimental and numerical methods. The credibility of the experimental result is higher than the numerical result, while the numerical study can help to describe the flow and heat transfer patterns in the tested section.…”

Section: Introductionmentioning

confidence: 99%

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Forced convective heat transfer and thermal efficiency assessment in square channel equipped with 10° wavy thin rib

Boonloi

Jedsadaratanachai

2014

Advances in Mechanical Engineering

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Forced convective heat transfer and thermo-hydraulic efficiency in the heat exchanger square channel (HESC) inserted with 10° wavy thin rib (WTR) are reported numerically. The effects of rib height, pitch distance and flow velocity on flow and heat transfer profiles are considered. The rib height to the channel height; e/H or HR, is varied in the range 0.05–0.30, while the rib pitch to the channel height; P/H or PR, is varied in the range 0.50–1.25. The air velocity in the HESC inserted with the WTR is considered in terms of Reynolds number. The Reynolds numbers (Re = 100–2000) for the present investigation is analyzed at the inlet condition. The finite volume method (commercial code) with SIMPLE algorithm is picked to solve the present problem. The numerical model of the HESC inserted with the WTR is validated for both grid independence and verification of the smooth HESC. The numerical results of the HESC inserted with the WTR are printed in terms of flow and heat transfer profiles. The values of Nusselt number, friction factor and thermal efficiency factor in the HESC inserted with the WTR are also plotted. As the numerical result, it is found that the WTR in the HESC can produce the vortex flow that the reason for the enhancements of heat transfer and efficiency. The increment of the heat transfer ability in the HESC is detected when increasing rib height and Reynolds number. In addition, the greatest thermal efficiency factor in the HESC inserted with the WTR is around 3.43 at HR = 0.20, PR = 1, and Re = 2000.

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“…The air velocity is presented in term of the Reynolds number based on the hydraulic diameter of the HESC. The Reynolds number can be written as equation (1).…”

Section: Mathematical Foundation Numerical Method Assumption and Bmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Forced convective heat transfer and thermal efficiency assessment in square channel equipped with 10° wavy thin rib

Boonloi

Jedsadaratanachai

2014

Advances in Mechanical Engineering

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“…W zależności od technologii otrzymuje się żebra obwodowe rozmieszczone z daną podziałką lub żebra spiralne o określonym skoku. Z uwagi na różnorodność procesów, technologii, jak i zastosowań powierzchni żebrowanych, w bibliografii można odnaleźć wiele badań dotyczących wyznaczenia charakterystyk cieplnych i przepływowych wymienników dla różnych parametrów konstrukcyjnych żeber czy też specyficznego zastosowania [8,9]. Na przykład w przypadku ożebrowania kanału w wymienniku krzyżowym rekuperatora bardziej korzystne pod względem efektywności wymiany ciepła jest wykorzystanie kanału o mniejszym przekroju i rzadszym ożebrowaniu niż o większym przekroju i gęstszym ożebrowaniu [10].…”

Section: Wprowadzenieunclassified

Wpływ Ożebrowania Rury Na Warunki Wymiany Ciepła Przy Konwekcji Swobodnej W Powietrzu

Tychanicz-Kwiecień¹,

Mazur²,

Gil³

et al. 2019

ZN PRz Mechanika

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“…Jedsadaratanachai et al. 25 used wavy v rib and Zhang et al. 26 used screw cinquefoil type baffle to enhance heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis on thermal and friction factor characteristics of fluid flow in tube with novel double strip helical screw tape

Chaurasia

Sarviya

2019

Proceedings of the Institution of Mechanical Engineers, Part A:

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An experimental analysis has been carried out to investigate the thermal and friction factor characteristics of fluid flow in a tube with double strip helical screw tape (DS-HST) inserts with different values of twist ratio and compared with single strip helical screw tape inserts and plain tube. Water is used as a working fluid at different flow rates with constant heat flux conditions. CFD analysis is also carried out to visualize thermal and fluid flow characteristics of fluid flow in tube with inserts. Experimental results have showed that Nusselt number and friction factor have attained excellent enhancement with double strip helical screw tape inserts in the range of flow rates than single strip helical screw tape inserts at the value of twist ratio 1.5. Correlation is also developed for Nusselt number with a range of Reynolds number, twist ratio and number of strips. Moreover, the performance ratio has attained maximum value at twist ratio of 2.5 with high values of flow rate. It is concluded that DS-HST is able to attain enhancement in the efficiency of heat exchanger, causing a reduction in size for thermal applications.

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Performance analysis and flow visualization in a round tube heat exchanger inserted with wavy V-ribs

Cited by 9 publications

References 34 publications

Forced convective heat transfer and thermal efficiency assessment in square channel equipped with 10° wavy thin rib

Forced convective heat transfer and thermal efficiency assessment in square channel equipped with 10° wavy thin rib

Wpływ Ożebrowania Rury Na Warunki Wymiany Ciepła Przy Konwekcji Swobodnej W Powietrzu

Experimental analysis on thermal and friction factor characteristics of fluid flow in tube with novel double strip helical screw tape

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