Volume 7 Issue 2 - July 2016

  • 1. Enhancement of heat transfer in solar air heater roughened with circular v rib having gap

    Authors : Kulbir Singh, Sunaina Bhasin, Gurpreet Singh

    Pages : 584-590

    DOI : http://dx.doi.org/10.21172/1.72.589

    Keywords : Solar air heaters, angle of attack, heat transfer, Reynolds number, thermal efficiency

    Abstract :

    This paper presents the results of heat transfer enhancement of a solar air heater with v-down rib having gap roughness on the air flow side of the absorber plate. Ribs were attached on absorber plate, having angle of attack (α= 60o). The ratio of rib height to hydraulic diameter (e/D) was 0.04770 mm, while the range of rib pitch-to-height ratio was (P/e = 4, 8 and 16 mm). Experiments were carried out using air as the convective fluid, with the Reynolds number range (Re = 1825 - 7759). The heat transfer of this roughened duct has been compared with those of the smooth duct under similar flow condition. The thermal efficiency by providing gap of 8 mm in V- shaped rib roughness on absorber plate is approximately 20-21 % more as compared to smooth plate.

    Citing this Journal Article :

    Kulbir Singh, Sunaina Bhasin, Gurpreet Singh, "Enhancement of heat transfer in solar air heater roughened with circular v rib having gap", https://www.ijltet.org/journal_details.php?id=906&j_id=3297, Volume 7 Issue 2 - July 2016, 584-590, #ijltetorg