Performance assessment of double-pass parallel flow solar air heater with perforated multi-V ribs roughness — Part B

ABSTRACT

After analyzing the effect of perforation in a single pass solar air heater in part A, an experimental comparative study was performed on a Double Pass Parallel Flow Solar Air Heater (DPPFSAH) roughened with continuous and perforated multi-V rib roughness. In DPPFSAH, for perforated rib roughness, the gain in Nu/Nus, f/fs, and Thermo-hydraulic performance parameter (THPP) for W/w = 6 are 8.33, 9.09, and 2.97, respectively. While for continuous rib for W/w = 6 the values of Nu/Nus, f/fs, and THPP are 5.93, 10.83, and 1.82, respectively, as compared to the smooth plate. The results strongly support the application of perforation in artificial roughness.

GRAPHICAL ABSTRACT

KEYWORDS:

• Double pass
• perforation
• multi-V rib
• open area ratio
• solar air heater

Acknowledgments

The authors acknowledge the Solar Energy Centre, Department of Mechanical Engineering, College of Engineering Roorkee (COER), Roorkee, India, for supporting this research work and providing facilities to develop setup and conduct experiments at their facility.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Nomenclature

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