@ARTICLE{Kumar_Dhananjay_Heat_2023,
 author={Kumar, Dhananjay},
 volume={vol. 44},
 number={No 1},
 journal={Archives of Thermodynamics},
 pages={63-87},
 howpublished={online},
 year={2023},
 publisher={The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences},
 abstract={The present paper describes the experimental analysis of heat transfer and friction factor for glass protected three-side artificially roughened rectangular duct solar air heaters (SAHs) having an arrangement of multiple-v and transverse wires (top wall multi-v and two side walls transverse) under the absorber plate, and compares their performance with that of one-side roughened solar air heaters under similar operating conditions. The investigated three-side solar air heaters are characterized by a larger rate of heat transfer and friction factor as compared to one-side artificially roughened SAHs by 24–76% and 4–36%, respectively, for the identical operating parameters. The air temperature below the three-side rugged duct is by 34.6% higher than that of the one-side roughened duct. Three-side solar air heaters are superior as compared to one-side artificially roughened solar air heaters qualitatively and quantitatively both.},
 type={Article},
 title={Heat transfer and friction characteristics in three-side solar air heaters with the combination of multi-v and transverse wire roughness},
 URL={http://www.journals.pan.pl/Content/127281/PDF/art04_int.pdf},
 doi={10.24425/ather.2023.145877},
 keywords={Absorber plate, Fluid flow, Heat transfer, Solar air heater, Reynolds number, Relative roughness height},
}