Establishment of correlations for the thermo-hydraulic parameters due to perforation in a multi-V rib roughened single pass solar air heater

ABSTRACT

The effect of variation in open area ratio (β) in a multi-V rib roughened Single-Pass Solar Air Heater (SPSAH) is analyzed in this work. Fixing values of other parameters, such as open area ratio (β) and relative roughness width (W/w), were studied with a certain range of Reynolds number (Re) ranging from 2000 to 18000. The improvement in Nusselt number ratio (Nu/Nus) and thermo-hydraulic performance (THPP) and the decline in duct friction ratio (f/fs) support the application of perforation. The empirical correlations of Nu and f are also generated with ±12% and ±7.5% accuracy.

Graphical Abstract

KEYWORDS:

• Solar energy
• solar air heater
• correlation
• open area ratio
• multi-V rib

Acknowledgments

The authors acknowledge ME Department, College of Engineering Roorkee (COER), Roorkee, India for supporting this research work and providing facilities to develop setup and conducting experiments on their facility.

Disclosure statement

No potential conflict of interest was reported by the authors.

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