Performance study of solar air heater having v-down discrete ribs on absorber plate

Rajendra Karwa and Girish Chitoshiya

Energy, 2013, vol. 55, issue C, 939-955

Abstract: The paper presents results of an experimental study of thermo-hydraulic performance of a solar air heater with 60° v-down discrete rib roughness on the airflow side of the absorber plate along with that for a smooth duct air heater. The enhancement in the thermal efficiency due to the roughness on the absorber plate is found to be 12.5–20% depending on the airflow rate; higher enhancement is at the lower flow rate. The experimental data have been generated and utilized to validate a mathematical model, which can be utilized for design and prediction of performance of both smooth and roughened air heaters under different operating conditions. The results of a detailed thermo-hydraulic performance study of solar air heater with v-down discrete rib roughness using the mathematical model are also presented along with the effect of variation of various parameters on the performance.

Keywords: Smooth and roughened duct solar air heater (collector); V-down discrete rib roughness; Thermal efficiency; Effective efficiency (search for similar items in EconPapers)
Date: 2013
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Citations: View citations in EconPapers (14)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:55:y:2013:i:c:p:939-955

DOI: 10.1016/j.energy.2013.03.068

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