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Design and implementation of a directly cooled PV/T

Busiso Mtunzi (Fort Hare Institute of Technology, University of Fort Hare, Alice, South Africa)
Edson L. Meyer (Fort Hare Institute of Technology, University of Fort Hare, Alice, South Africa)

Journal of Engineering, Design and Technology

ISSN: 1726-0531

Article publication date: 6 July 2015

188

Abstract

Purpose

The purpose of this paper is to design and implement a directly cooled photovoltaic thermal (PV/T) hybrid system.

Design/methodology/approach

The research design subjects, instruments and methods that were used to collect data are as detailed in the paper. Two polycrystalline photovoltaic (PV) modules were used in this study.

Findings

The directly water-cooled PV module (PV/T) was found to operate better as compared to a naturally cooled module for the first three months. The PV/T initially operated at a higher electrical efficiency for 87 per cent of the day. The monthly energy-saving efficiency of the PV/T was found to be approximately 61 per cent, while the solar utilisation of the naturally cooled PV module M1 was found to be 8.79 per cent and that of M2 was 47.93 per cent.

Research limitations/implications

The major limitation was the continued drop in efficiency after the first three months of the PV/T placed outdoors. The fall in the efficiency was attributed to water ingress.

Practical implications

Direct water cooling of PV modules is possible, only that a better sealing is needed to prevent water ingress.

Originality/value

PV air cooling has been researched on. Use of water as a cooling medium has been carried out using serpentine pipes or riser tube, and no direct water cooling on the back of the module has been researched on.

Keywords

Citation

Mtunzi, B. and Meyer, E.L. (2015), "Design and implementation of a directly cooled PV/T", Journal of Engineering, Design and Technology, Vol. 13 No. 3, pp. 369-379. https://doi.org/10.1108/JEDT-09-2013-0063

Publisher

:

Emerald Group Publishing Limited

Copyright © 2015, Emerald Group Publishing Limited

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