Analysis on three-dimensional flow and heat transfer in a cross wavy primary surface recuperator for a microturbine system

Gui, Xiaohong; Song, Xiaoguo; Li, Tie; Tang, Dawei

doi:10.2298/tsci120410209x

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…We will calculate the power required for pumping air and heat power supplied to the objects from eqs. (15) and (16), respectively:…”

Section: Methodsmentioning

confidence: 99%

“…Numerous publications have been devoted to the study of creative ways of increasing the heat transfer rate in compact heat exchangers [13][14][15][16], as well as in the flat plate air solar collector [17][18][19][20]. The symmetric corrugated or wavy-walled channel is one of several devices utilized for enhancing the heat transfer efficiency.…”

Section: --------------mentioning

confidence: 99%

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Numerical simulation of convective heat transfer coefficient in channel with corrugated walls

Kewou¹,

Marcel²,

Tawetsing³

et al. 2018

THERM SCI

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The present work is a contribution to study of convective heat transfer coefficient inside a rectangular channel with corrugated walls. Triangular, square, and rectangular shaped configurations were studied for a range of geometric parameters during simulation. The Navier-Stokes equations were numerically solved using the finite volume method through the EasyCFD_G package code in its V.4.1.0 version. With prescribed temperatures and velocities, the model predicts the behavior of the air-flow inside the device. The temperature and velocity distributions are first predicted. From these distributions, the convective heat transfer coefficients along the surface of the objects placed inside the system are determined. Also, from the pressure distribution, the pressure drops along the channel are predicted. The results show that the triangular corrugated-shaped configuration with h = 5 cm and α = β = 60° enable to obtain the best value of convective heat transfer coefficient on the surface of the objects which is 2.70 W/m 2°C resulting in a pressure drop of 0.11 Pa, while for parallel-plate channel configuration this same coefficient is 1.12 W/m 2°C. The energy balance enabled to conclude that the energy gain by convection air/objects is superior to the air pump energy to overcome the pressure drop.

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“…We will calculate the power required for pumping air and heat power supplied to the objects from eqs. (15) and (16), respectively:…”

Section: Methodsmentioning

confidence: 99%

Section: --------------mentioning

confidence: 99%

Numerical simulation of convective heat transfer coefficient in channel with corrugated walls

Kewou¹,

Marcel²,

Tawetsing³

et al. 2018

THERM SCI

View full text Add to dashboard Cite

show abstract

“…They also developed some empirical correlations expressing the results. When looking at the literature studies on wavy fin geometries in recent years [12][13][14][15][16][17][18][19], it can be seen that the subject still keeps up-to date.…”

Section: Introductionmentioning

confidence: 99%

Effect of wavy fin usage on thermal performance of heat exchanger used in combi boilers

et al. 2020

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In this study, performance of a heat exchanger used in combi boilers was investigated numerically for different fin geometries. Analyses were performed at the boiler operation conditions. A commercial CFD software package, FLUENT, was used for numerical simulations. The 3-D steady-state turbulent flow field analysis was carried out and k-ε model was preferred as the turbulence model. In the analysis, it was assumed that the heat transfer phenomenon occurred both by conduction and convection. Flat fin geometry was taken as a reference for the investigation. Variation of the heat transfer and pressure drop values for the wavy fin were compared with the reference geometry. The wave angle and wave radius were taken as the parameters for the wavy fins. For different fin geometries: the outlet temperature of the combustion gases, the heat transfer to the water, and the pressure drop were calculated and the results were presented. Compared with flat fin, average decrease for the outlet temperature of hot gases was obtained as 4 K and average increase for the heat transfer to the water was calculated as 0.68 W. On the other hand, the average pressure drop in the heat exchanger with wavy fins was about 70% higher than the flat fin.

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Investigation of cross-wavy primary surface structures for heat exchangers of Brayton cycle system using argon

Yuan,

Tian,

Yan

et al. 2024

Progress in Nuclear Energy

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Analysis on three-dimensional flow and heat transfer in a cross wavy primary surface recuperator for a microturbine system

Cited by 4 publications

References 6 publications

Numerical simulation of convective heat transfer coefficient in channel with corrugated walls

Numerical simulation of convective heat transfer coefficient in channel with corrugated walls

Effect of wavy fin usage on thermal performance of heat exchanger used in combi boilers

Investigation of cross-wavy primary surface structures for heat exchangers of Brayton cycle system using argon

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