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Commenced in January 2007 Frequency: Monthly Edition: International Publications Count: 29414


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10000200
Performance of Single Pass Down Stream Solar Air Collector with Inclined Multiple V-Ribs
Abstract:
Solar air heater is a type of heat exchanger which transforms solar radiation into heat energy. The thermal performance of conventional solar air heater has been found to be poor because of the low convective heat transfer coefficient from the absorber plate to the air. It is attributed to the formation of a very thin boundary layer at the absorber plate surface commonly known as viscous sub-layer. Thermal efficiency of solar air heater can be improved by providing the artificial roughness on absorber plate is the most efficient technique. In this paper an attempt is made to provide artificial roughness by incorporating inclined multiple V-ribs in the underside of the absorber plate. 60˚V – ribs are arranged inclined to the direction of air flow. Performance of collector estimated theoretically and experimentally. Results of the investigation reveal that thermal efficiency of collector with multiple V-ribs increased by 14%.
Digital Object Identifier (DOI):

References:

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[13] Momin A-M.E., Saini J.S., Solanki S.C., “Heat transfer and friction in solar air heater duct with Vshaped rib roughness on absorber plate”, International J. of Heat and Mass Transfer, 45(16), 3383-3396, 2001.
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[15] Rajendra Karwa, Girish Chitoshiya, “Performance study of solar air heater having v-down discrete ribs on absorber plate”, Energy 55 939- 955, 2013.
[16] Suman Saurav, Sahu M.M., “Heat Transfer and Thermal Efficiency of Solar Air Heater Having Artificial Roughness A Review”, .International journal of renewable energy research, Vol. 3, No. 3, 2013.
[17] Sukhmeet Singh, Subhash Chander, Saini J.S, “Heat transfer and friction factor of discrete V-down rib roughened solar air heater ducts”, Journal of Renewable Sustainable Energy 3(1):013108e17, 2011.
[18] Sukhmeet Singh, Subhash Chandera, Saini. J.S., “Heat transfer and friction factor correlations of solar air heater ducts artificially roughened with discrete V-down ribs”, Energy 36 5053-5054, 2011.
[19] Varun, Saini R.P, Singal S.K, “Investigation of thermal performance of solar air heater having roughness elements as a combination of inclined and transverse ribs on the absorber plate”, Renewable Energy 33 1398- 1405, 2008.
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