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Research Papers

Performance Study of a Photovoltaic Thermal System With an Oscillatory Flow Design

[+] Author and Article Information
M. Rahou

e-mail: maryam.rahou@gmail.com

A. Ibrahim

Solar Energy Research Institute,
Universiti Kebangsaan Malaysia,
43600 Bangi, Selangor, Malaysia

1Corresponding author.

Contributed by the Design Theory and Methodology Committee of ASME for publication in the Journal of Solar Energy Engineering. Manuscript received September 26, 2012; final manuscript received March 5, 2013; published online July 22, 2013. Assoc. Editor: Werner Platzer.

J. Sol. Energy Eng 136(1), 011012 (Jul 22, 2013) (6 pages) Paper No: SOL-12-1253; doi: 10.1115/1.4024743 History: Received September 26, 2012; Revised March 05, 2013

In this study, integrated photovoltaic thermal roofing system has been successfully built and tested to improve the photovoltaic efficiency as well as providing domestic hot water supply. The major components of the solar photovoltaic thermal (PV/T) collector in this study comprise of amorphous silicon solar cells arranged in series that were adhered to the roofing structure. Unified structure of copper tube absorbers with oscillatory flow configuration was attached to the back plate which was insulated with glass wool from the surrounding. The entire PV/T collector has been mounted on a manual two degree solar tracker that can be adjusted toward the exposure of maximum solar irradiation. The effect of altering parameters such as water mass flow rate and irradiance on the collector's efficiencies has been carried out. The combined efficiency including photovoltaic and thermal efficiencies varies from 70.53% to 81.5% in the PV/T system with the oscillatory flow configuration. The present study has shown better results in terms of PV/T efficiency in comparison with the prior corresponding experiments.

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Figures

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Fig. 1

Schematic of photovoltaic thermal solar collector

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Fig. 2

The dual axis manual solar tracker

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Fig. 3

Schematic diagram of experimental setup for the designed integrated PV/T system

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Fig. 4

Changes on photovoltaic temperature versus changes of mass flow rate for various solar intensities

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Fig. 5

Changes on temperature rise versus changes of mass flow rate for various intensities of radiation

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Fig. 6

The effect of mass flow rate on PV, thermal and combined PV/T efficiencies

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Fig. 7

Effect of temperature rise on the thermal efficiency at various mass flow rates and solar intensities

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Fig. 8

Effect of temperature rise on the combined efficiency at various mass flow rates and solar intensities

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