Semnan University Press Journal of Heat and Mass Transfer Research 2345-508X 11 2 2024 11 01 CFD Simulation of Photovoltaic Thermal (PV/T) Cooling System with Various Channel Geometries 297 306 8964 10.22075/jhmtr.2024.33787.1551 EN I Gede Febri Bala Antara Mechanical Engineering Department of Udayana University, Street of Bukit Jimbaran, Badung, Bali 80361, Indonesia Made Sucipta Mechanical Engineering Department of Udayana University, Street of Bukit Jimbaran, Badung, Bali 80361, Indonesia Ketut Astawa Mechanical Engineering Department of Udayana University, Street of Bukit Jimbaran, Badung, Bali 80361, Indonesia I Ketut Gede Wirawan Mechanical Engineering Department of Udayana University, Street of Bukit Jimbaran, Badung, Bali 80361, Indonesia Made Sukrawa Civil Engineering Department of Udayana University, Street of Bukit Jimbaran, Badung, Bali 80361, Indonesia Journal Article 2024 04 14 Photovoltaic/thermal (PV/T) is a solution for solar energy conversion devices to increase their efficiency. One of the challenges of PV/T is maintaining the temperature at optimal working conditions. Various studies have been conducted to improve PV/T performance, one of which is through the design of thermal collectors on PV/T. In this study, Computational Fluid Dynamics (CFD) simulations were conducted using four different types of channels: circular, hexagonal, semi-circular, and square. The channels were made with the same tube cross-sectional area and mass flow rate of 0.0016 m² and 0.0096 kg/s, respectively. The simulation results show that the circular channel numerically gives the lowest PV cell temperature, 317.95 K, with an electrical efficiency of 14.70% and a thermal efficiency of 44.18%. This is because the water velocity in the circular channel can be faster than the other channels.  The circular channel has a thinner boundary layer, so the velocity is maximized, and the heat transfer rate increases. https://jhmtr.semnan.ac.ir/article_8964_2b7cddaf94bde45108a1f521b4fde644.pdf