Heat transfer and friction in solar air heater duct with W-shaped rib roughness on absorber plate

Lanjewar, Atul; Bhagoria, J.L.; Sarviya, R. M.

doi:10.1016/j.energy.2011.03.054

Cited by 181 publications

(49 citation statements)

References 39 publications

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“…It is related with the pressure drop ðDPÞ across the channel [7]. Friction factor is inversely proportional to the heat transfer rate.…”

Section: Friction Factormentioning

confidence: 99%

“…(25), experimental heat transfer coefficient can be determined and based on this experimental Nu (Nusselt number) can be calculated from following equation [7].…”

Section: Nusselt Numbermentioning

confidence: 99%

“…Lanjewar et al [7] experimentally studied the heat transfer and friction factor in duct with w-shaped rib roughness on absorber plate and concluded that thermo-hydraulic performance improves with angle of attack of the flow with maximum at 60 and relative roughness height. Sun et al [8] studied the influence of duct depth on the performance of solar air heaters and discovered an optimum height of 10 cm for single pass and for double pass, the ratio of upper to down channel height should not be less than 11 cm.…”

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Comprehensive study on solar air heater with circular and V-type turbulators attached on absorber plate

Rajaseenivasan¹,

Srinivasan²,

Srithar³

2015

Energy

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“…It is related with the pressure drop ðDPÞ across the channel [7]. Friction factor is inversely proportional to the heat transfer rate.…”

Section: Friction Factormentioning

confidence: 99%

“…(25), experimental heat transfer coefficient can be determined and based on this experimental Nu (Nusselt number) can be calculated from following equation [7].…”

Section: Nusselt Numbermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Comprehensive study on solar air heater with circular and V-type turbulators attached on absorber plate

Rajaseenivasan¹,

Srinivasan²,

Srithar³

2015

Energy

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“…Singh et al [18] Thermal efficiency and effective efficiency based analysis has been carried out numerically for the solar air heater having discrete V-down wire rib roughness. Lanjewar et al [19] studied a very narrow channel (AR = 8:1) with W-shaped, discrete W-shaped, v-shaped, angled ribs. Singh et al [20] conducted an experimental study on solar air heater roughened with circular transverse rib in actual atmospheric condition.…”

Section: Issn: 2321-9653; Ic Value: 4598; Sj Impact Factor: 6887 Vomentioning

confidence: 99%

Experimental Analysis of Double Flow Solar Air Heater by using Multiple Arc Shape Baffle as Artificial Roughness- A Review

Ray¹

2018

IJRASET

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In the present paper, a comprehensive investigation on solar air heater for heating air having circular wire rib with artificial roughness in the form of arc shape on the back side of absorber plate, has been carried out. Artificial roughness used on the absorber plate is efficient method to improve performance of solar air heater. In present investigation on performance calculation of Solar Air Heater with arc shaped wire rib with artificial roughness absorber plate has been carried out by mathematical model and it is compared with a plane absorber Solar Air Heater. Multiple arc shaped ribs of double flow gives better heat transfer. All the parameters in this investigation has been decided on the basis of practical consideration of the system and operating condition of solar air heaters. In this investigation the parameters are taken such as relative roughness height(e/d) and angle of attack(α/90) have been studied on Nusselt number(Nu) and friction factor(f) with Reynolds number(Re) varies from 2000 to 17000.

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“…Sahu et al [15] experimentally investigated the heat transfer coefficient by using 900 broken transverse ribs on absorber plate of a solar air heater, Gupta et al [11] experimentally investigated the effect of relative roughness height (e/d), Aharwal et al [17] carried out result of inclination of rib with respect to flow direction and Reynolds number (Re) on the thermo hydraulic performance of a roughened solar air heater for transitionally rough flow region. Lanjewar et al [22] studied a very narrow channel (AR = 8:1) with Wshaped, discrete W-shaped, v-shaped, angled ribs. Singh et al [23] carried out the result of thermo-hydraulic performance due to flow attack angle in V-down rib with gap in the rectangular duct of solar air heater.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of heat transfer of solar air heater roughened with circular transverse RIB

Singh¹,

Sidhu²

2014

International Advanced Research Journal in Science, Engineering

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An experimental investigation of the effect of geometrical parameters of circular transverse ribs on heat transfer of rectangular duct with heated plate having rib roughness on its underside have been reported. The range of parameters for this study has been decided on the basis of practical considerations of the system and operating conditions of solar air heaters. The experimental investigation encompassed the Reynolds number (Re) range from 2564 to 6206; relative roughness pitch (P/e) of 8, angle of attack (α) of 90° and relative roughness height (e/Dh) is 0.047. The thermal efficiency of roughened duct is observed to be 5%-9% more as compare to the smooth duct. The thermal efficiency is increased with increasing the value of Reynolds number.

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Heat transfer and friction in solar air heater duct with W-shaped rib roughness on absorber plate

Cited by 181 publications

References 39 publications

Comprehensive study on solar air heater with circular and V-type turbulators attached on absorber plate

Comprehensive study on solar air heater with circular and V-type turbulators attached on absorber plate

Experimental Analysis of Double Flow Solar Air Heater by using Multiple Arc Shape Baffle as Artificial Roughness- A Review

Enhancement of heat transfer of solar air heater roughened with circular transverse RIB

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