%0 Journal Article %T Energy, Exergy and Economic Analysis of Solar Air Heaters with Different Roughness Geometries %J Journal of Solar Energy Research %I University of Tehran %Z 2588-3097 %A Shadi, Milad %A Davodabadi Farahani, Somayeh %A Hajizadeh Aghdam, Abolfazl %D 2020 %\ 05/01/2020 %V 5 %N 2 %P 390-399 %! Energy, Exergy and Economic Analysis of Solar Air Heaters with Different Roughness Geometries %K Solar air heater %K Exergy %K Annual Cost %K Roughness %K NSGA II %R 10.22059/jser.2020.297646.1142 %X Artificially roughened surface is a comon method to enhance the heat transfer in a flow passage. Energy, exergy and economic analysis of solar air heaters with different roughness geometries have been done. To improve the performance of the solar collector, 4 different types of roughness on the absorber plate have been used. It was found that the most efficient roughness is Discrete V Rib and the least expensive roughness is U-Shape turbulator. NSGA II and TOPSIS algorithms used to select the best roughness geometry. %U https://jser.ut.ac.ir/article_75934_220e2351cf8b11baa940a66825e401bb.pdf