• Anup Kumar
• Amit Prakash Sen
• Kumar Rajeev

A recent decade, the various number of investigations shows that the implementation of various geometrical roughness results the enhancement of the thermal efficiency. In such double pass flow solar air heater, the initial air flows in upper channel and reverse its direction to reaches in lower channel of the collector. A mathematical model is developed for double pass solar roughened air collector with different influencing parameters such as solar radiation, inlet air temperature, length of solar collector, and flow rate. The results shows that these parameters have significant influence on the thermal efficiency.

Solar air heater; double pass; Artificial roughness; Thermal Efficiency

"The effect of Discrete V-down rib roughness over Double pass roughened solar air heater", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 9, page no.147-149, September-2022, Available :http://www.jetir.org/papers/JETIRFS06025.pdf

"The effect of Discrete V-down rib roughness over Double pass roughened solar air heater", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 9, page no. pp147-149, September-2022, Available at : http://www.jetir.org/papers/JETIRFS06025.pdf