Ergün, A.Kayfeci, M.Karaagaç, M.O.2024-09-292024-09-292023978-044319017-9978-044319018-6https://doi.org/10.1016/B978-0-443-19017-9.00018-0https://hdl.handle.net/20.500.14619/9599Solar panels (also called PV panels) have been widely used in recent years to generate electricity from solar energy. One of the biggest disadvantages of PV panels is their low efficiency. In general, the efficiency of a PV panel varies between 15% and 20%. The temperature increase in PV panels is the most important parameter that causes their efficiency to decrease. Each 1°C increase in temperature causes approximately 0.45%–0.6% efficiency decrease. For this reason, cooling of PV panels increases their efficiency. Liquid-based cooling processes are frequently used for the water cooling process. But recent years researchers are examining air, oils, water, and water/nanofluids dispersions. In this chapter, liquid-based cooling of PV panels will be examined in detail. New studies in this field will be given with examples and developments in photovoltaic thermal (PV/T) applications will be mentioned. © 2023 Elsevier Inc. All rights reserved.eninfo:eu-repo/semantics/closedAccessFluidsNanofluidsPanel coolingPerformancePhotovoltaic thermalBook Part10.1016/B978-0-443-19017-9.00018-02-s2.0-85176870662604N/A591