Open AccessInfluence of number of gaps created in a arc shaped roughened absorber plate used in solar air-heaters
Author(s) -
Navneet Kumar Pandey,
V.K. Bajpai,
Sanjay Yadav
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/691/1/012079
Subject(s) - surface finish , materials science , heat transfer , optics , solar energy , arc (geometry) , air gap (plumbing) , surface roughness , radiant heating , radiant energy , mechanics , mechanical engineering , composite material , physics , engineering , radiation , electrical engineering
Experimental investigation to study the influence of number of gaps in arc shaped roughness elements on heat transfer (Nu) and friction penalty (f) used in solar air-heaters (SAHs) was performed. A heating source of 1000 W/m 2 was provided on the top of the surface to simulate the radiant energy of the sun. Experimentation was done to ascertain the influence of gaps with 36 set of test results. The result shows that the highest value of Nu was obtained for roughness element which is having number of gaps equal to 2.