Thermo-hydraulic efficiency and correlation development of an indoor designed jet impingement solar thermal collector roughened with discrete multi-arc ribs

Raj Kumar, Sushil Kumar, Rahul Nadda, Khusmeet Kumar and Varun Goel

Renewable Energy, 2022, vol. 189, issue C, 1259-1277

Abstract: The present work examines the combined influence of artificial roughness and jet impingement on the performance of solar air heater (SAH). The impingement jet SAH is roughened with discrete multi-arc-shaped ribs. The experiment is performed by varying the Reynolds number (Re) from 3000 to 19,000. The different roughness parameters of multi-arc ribs varied during experimentation are as follows; relative discrete distance (Dd/Lv) from 0.27 to 0.86, relative discrete width (gw/Hr) from 0.32 to 1.72, relative rib height (Hr/H) from 0.025 to 0.047, relative rib pitch (Pr/H) from 0.58 to 3.1, arc angle (αa) from 35° to 65°, the streamwise pitch ratio (X/Dh) from 0.47 to 1.72 and spanwise pitch ratio (Y/Dh) from 0.46 to 0.82. The Nusselt number (Nu) and friction factor (f) for roughened solar thermal collector are found to be 7.61 and 6.48 times higher than that of smooth channel. A thermal-hydraulic performance of 4.1 is obtained for the array of designed parameters. The correlations are also established for Nu and f using experimental data. So, utilizing roughness element along with jet impingement in SAH is found to have a substantial impact on its thermo-hydraulic performance (ηthp).

Keywords: Artificial roughness; Thermo-hydraulic performance; Solar air heater; Jet impingement; Multi-arc shaped ribs (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148122003147
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:189:y:2022:i:c:p:1259-1277

DOI: 10.1016/j.renene.2022.03.037

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().