TY - JOUR N2 - The Bulletin of the Polish Academy of Sciences: Technical Sciences (Bull.Pol. Ac.: Tech.) is published bimonthly by the Division IV Engineering Sciences of the Polish Academy of Sciences, since the beginning of the existence of the PAS in 1952. The journal is peer‐reviewed and is published both in printed and electronic form. It is established for the publication of original high quality papers from multidisciplinary Engineering sciences with the following topics preferred: Artificial and Computational Intelligence, Biomedical Engineering and Biotechnology, Civil Engineering, Control, Informatics and Robotics, Electronics, Telecommunication and Optoelectronics, Mechanical and Aeronautical Engineering, Thermodynamics, Material Science and Nanotechnology, Power Systems and Power Electronics. Journal Metrics: JCR Impact Factor 2018: 1.361, 5 Year Impact Factor: 1.323, SCImago Journal Rank (SJR) 2017: 0.319, Source Normalized Impact per Paper (SNIP) 2017: 1.005, CiteScore 2017: 1.27, The Polish Ministry of Science and Higher Education 2017: 25 points. Abbreviations/Acronym: Journal citation: Bull. Pol. Ac.: Tech., ISO: Bull. Pol. Acad. Sci.-Tech. Sci., JCR Abbrev: B POL ACAD SCI-TECH Acronym in the Editorial System: BPASTS. L1 - http://www.czasopisma.pan.pl/Content/113066/PDF/06_paper.pdf L2 - http://www.czasopisma.pan.pl/Content/113066 PY - 2019 IS - No 2 EP - 135 DO - 10.24425/ather.2019.129544 KW - Artificial roughness KW - Entropy generation KW - Entropy generation minimization KW - Augmentation entropy generation number KW - Solar air heater A1 - Sahu, Mukesh Kumar A1 - Prasad, Radha Krishna PB - The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences VL - vol. 40 DA - 2019.06.27 T1 - Second law optimization and parametric study of a solar air heater having artificially roughened absorber plate SP - 107 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/113066 T2 - Archives of Thermodynamics ER -