Laminar Heat Transfer and Pressure Drop in Tube Fitted with Helical Louvered Rod Inserts Using CNT/Water Nanofluids

Numerical study of perforated obstacles effects on the performance of solar parabolic trough collector

“…In recent years, various combinations of nanofluids as well as affecting parameters on the different structures are taken for analysisoriented with the thermal application such as solar collectors. They have been considered and developed, as a result, effective enhancement of heat transfer achieved by many research works (Rathnakumar et al, 2014;Kumar et al, 2018;Ghanbar et al, 2019;Hamid et al, 2019;Hussein et al, 2019;Jing et al, 2020;Ramin et al, 2020;Syam, Said, Saleh, Singh, Antonio Sousa;Abdulwahab et al, 2021;Azmi et al, 2021;Kamel et al, 2021;Seyed Reza et al, 2021). To the authors' knowledge, no research has been done on the examination of the position and number of perforations to optimize and to enhance the performance of a photovoltaic-thermal system (PV/T) by employing nanofiuid and a wavy-strip insert.…”

“…In addition, the wire coils can enhance the heat transfer of TiO 2 –SiO 2 nanofluids by up to 211.75%. Rathnakumar et al ( Rathnakumar et al, 2014 ) considered improving heat transport turbulent fiow in a tube by equipping it with helical screw louvered rod inserts and employing (CNT)/water nanofiuids at various volume concentrations. The calculations indicated that the helical louvered rod inserts cause augmentation in heat transfer for a certain Reynolds number compared to a plain tube, whereas the friction factor also increased.…”