Experimental investigation of the usability of the rifled serpentine tube to improve energy and exergy performances of a nanofluid-based photovoltaic/thermal system

This experimental study aims to energetically and exergetically compare the performance of a PVT system with sheet-and-plain serpentine tube collector (base system) two cases modified systems. The systems are replacements plain rifled 3 ribs (3-start 6 (6-start system). electrical parameter PV module without cooling is compared three cooling. fluid water/magnetite nanofluid. effect nanofluid flow rates (20–80 kg/h) nanoadditive volume concentrations (0–2%) over investigated propose suitable combination rate NA concentration offering best energetic exergetic performances. Thus, 6-start achieved maximum 22.5% 3.8% higher overall energy efficiency, 5.9%, 1.9% exergy efficiency than base 3-start at 80 kg/h 2%. Finally, power generated by base, rifled, enhancement 27.5%, 29.5%, 31.5%