Journal ArticleDOI
Heat transfer enhancement in solar air heater duct with conical protrusion roughness ribs
Tabish Alam,Man-Hoe Kim +1 more
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TLDR
In this article, the effect of relative ribs pitch and relative ribs height on Nusselt number and friction factor have been studied for the range of Reynolds number from 4000 to 16,000.About:
This article is published in Applied Thermal Engineering.The article was published on 2017-11-05. It has received 93 citations till now. The article focuses on the topics: Nusselt number & Heat transfer enhancement.read more
Citations
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Energy and exergy analysis of solar air heater having new design absorber plate with conical surface
TL;DR: In this article, a new design absorber plate with conical surface was investigated and compared to flat absorber plates in single front pass conventional solar air heater, and the experiments were performed for three mass flow rates of 0.04, 0.08 and 0.10 kg/s in outdoor conditions.
Journal ArticleDOI
Numerical investigation of heat transfer enhancement in a solar air heater roughened by multiple V-shaped ribs
TL;DR: In this paper, the authors investigated the performance of a multiple V-shaped rib roughened solar air heater with different geometrical parameters of the channel and rib, focused on their detailed effects on the maximum heat transfer enhancement.
Journal ArticleDOI
A review on recent developments in thermal performance enhancement methods of flat plate solar air collector
TL;DR: In this article, the authors provide an insight into the recent critical findings on the thermal performance enhancement of the flat plate solar air collector to stimulate further developments towards the betterment of sustainable development.
Journal ArticleDOI
Performance enhancement of a curved solar air heater using CFD
Ajeet Pratap Singh,Om P. Singh +1 more
TL;DR: In this paper, the authors reported the investigation of various curved solar air heater designs that shows significant enhancement of heat transfer and found that secondary vortex formation near the absorber wall increases the Nusselt number significantly.
Journal ArticleDOI
Second law of thermodynamics analysis for nanofluid turbulent flow inside a solar heater with the ribbed absorber plate
TL;DR: In this paper, the second law of thermodynamics analysis is performed for nanofluid turbulent flow in a solar heater duct with rib roughness on the absorber plate, and the effects of different parameters including rib height, rib wedge angle, rib pitch, Reynolds number, and nanoffluid concentration on thermal and frictional irreversibilities are investigated.
References
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Journal ArticleDOI
Heat transfer and friction in solar air heater duct with V-shaped rib roughness on absorber plate
TL;DR: In this article, the effect of geometrical parameters of V-shaped ribs on heat transfer and fluid flow characteristics of rectangular duct of solar air heater with absorber plate having V-shape ribs on its underside have been reported.
Journal ArticleDOI
Effect of artificial roughness on heat transfer and friction factor in a solar air heater
B.N. Prasad,J.S. Saini +1 more
TL;DR: In this article, the authors investigated the effect of roughness elements on the heat transfer rate and friction in a flat-plate solar air heater duct with small diameter protrusion wires on the absorber plate.
Journal ArticleDOI
Heat transfer and friction factor correlations for a solar air heater duct roughened artificially with multiple v-ribs
V.S. Hans,R.P. Saini,J.S. Saini +2 more
TL;DR: In this paper, the effect of multiple v-rib roughness on heat transfer coefficient and friction factor in an artificially roughened solar air heater duct was investigated, and correlations for Nusselt number and friction factors in terms of roughness geometry and flow parameters were developed.
Journal ArticleDOI
Heat transfer and friction characteristics of rectangular solar air heater duct using rib-grooved artificial roughness
TL;DR: In this paper, an experimental investigation on the heat transfer and friction characteristics of rib-grooved artificial roughness on one broad heated wall of a large aspect ratio duct shows that Nusselt number can be further enhanced beyond that of ribbed duct while keeping the friction factor enhancement low.
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