Abstract
The present paper studies the thermal performance of solar air heater which is artificially roughened by providing multiple arcs with gap shaped roughness element. As thermal efficiency of smooth collector is quite low, hence there is a need to augment heat transfer from the absorbing surface. The experimentation has been carried out for Reynolds number (Re) ranges from 2100- 21000, relative roughness height (e/D) of 0.044, relative roughness pitch (p/e) of 8, relative gap distance (d/x) range of 0.25- 0.85, relative roughness width (W/w) ranges from 1-7, relative gap width (g/e) range of 0.5-2 and arc angle (a) of 60°. The thermal efficiency is found to be best for relative gap distance (d/x), relative gap width (g/e) and relative roughness width (W/w) values are 0.65, 1.0 and 5 respectively.Keywords: Solar air heater; Nusselt number; thermal efficiency; multiple arcs with gap; roughened
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Engineering, Science and Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
