Kumar, K. , Prajapati, D.D. and Samir, D.S. 2015. Determination of Effective Efficiency of Artificially Roughened Solar Air Heater Duct Using Ribs. Distributed Generation & Alternative Energy Journal. 30, 3 (Mar. 2015). DOI:https://doi.org/10.13052/dgaej2156-3306.3224.