Experimental study of thermal and hydraulic performance of multi - pass jet impingement solar air heater

M.K. Mahato and S.N. Singh

Renewable Energy, 2025, vol. 249, issue C

Abstract: This present work deals with the experimental study of the effect of the jet diameter ratio, Dj/Dh and Reynolds number, ReDh on thermo-hydraulic performance of a double-pass inline-hole jet plate solar air heater (JPSAH) under cross-flow condition. In the present study, the ranges of geometrical and operating parameters such as, jet diameter ratio, Dj/Dh = 0.058, 0.077, 0.096, mass flow rate, m˙ = 0.10–0.14 kg/s, Reynolds number, ReDh = 9883–18469, and daily mean solar flux, IT = 702–1318 W/m2 are taken to get the experimental results in terms of Temperature rise parameter (TRP), collector efficiency, Nusselt number, Stanton number and efficiency index for the double-pass JPSAH. This work also compares the present results with simple double-pass solar air heater. It is found that the maximum percentage increments in Nusselt number, Stanton number and efficiency index are 101.5 %, 14.3 % and 113 % respectively at Re = 12011for Dj/Dh = 0.058 compared to simple double-pass solar air heater (SDPSAH). Based on the experimental data, correlations for the Stanton number, friction factor, and efficiency index have been developed.

Keywords: Double-pass; Jet diameter ratio; Inline holes; Cross flow; Stanton number; Efficiency index (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:249:y:2025:i:c:s0960148125007682

DOI: 10.1016/j.renene.2025.123106

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