An extensive review on the latest developments of using oscillating heat pipe on cooling of photovoltaic thermal system

Abstract

Photovoltaic-thermal (PV-T) panels are one of the major solar energy sources used to convert solar radiation into electrical power directly. This type of panel is considered a viable solution to guarantee energy security and reduce greenhouse gases. On the other hand, the efficiency of PV-T modules diminishes when the temperature of the nodule rises, leading to a degradation in the conversion efficiency along with the life span of a photovoltaic cell. Applying cooling techniques will lead to the decrease of the excess heat that is generated and will make the life span longer simultaneously. Higher efficiency can be achieved by incorporating oscillating heat pipe (OHP) into energy systems. PV-T module thermal and electrical efficiency can be improved by using an oscillating heat pipe. This review encourages the selection of an oscillating heat pipe and the heat transfer enhancement approach to increase energy conversion rate and the productivity corresponding to the PV-T system, as well as identifies the research gaps, future vision, and development that can be done. Firstly, the OHP-PV-T system and its performance in detail are illustrated. Then, the structure and working principles of the system are discussed, followed by a review of the work conducted in this case. The advantages of using an oscillating heat pipe as a solar panel cooling approach are then highlighted. Understanding the advanced cooling technologies mentioned above is vital for further modifications of current PV-T panels. Moreover, using nanofluid as coolant can make a significant contribution to enhancing the total system efficiency.