Experimental investigations on unglazed photovoltaic-thermal (PVT) system using water and nanofluid cooling medium

Govind S. Menon, S. Murali, Jacob Elias, D.S. Aniesrani Delfiya, P.V. Alfiya and Manoj P. Samuel

Renewable Energy, 2022, vol. 188, issue C, 986-996

Abstract: The electrical and thermal performance of an unglazed photovoltaic thermal (PVT) system integrated with a serpentine coil configured sheet and tube thermal absorber setup was evaluated using water and copper oxide-based nanofluid. An uncooled PVT system reached a maximum panel temperature of 68.4 °C at noon and obtained an average electrical efficiency of 12.98%. Water and nanofluid cooling of the PVT system reduced the panel temperature by 15 °C and 23.7 °C at noontime, respectively. Compared to the uncooled PVT system, the average electrical efficiency of water and nanofluid cooled PVT system increased by 12.32% and 35.67% to obtain 14.58% and 17.61%, respectively. The thermal efficiency of the nanofluid cooled PVT system (71.17%) was significantly higher than water cooling (58.77%) due to maximum heat absorption by nanoparticles. It was also observed that the overall efficiency of the nanofluid cooled PVT system was 21% higher than the water-cooled system. Also, obtained the highest primary energy-saving efficiency for the nanofluid cooled PVT system.

Keywords: Open circuit voltage; Short circuit current; Reduced temperature; Primary energy saving efficiency (PES) (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (19)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:188:y:2022:i:c:p:986-996

DOI: 10.1016/j.renene.2022.02.080

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