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Research Article
A comparative study on the energetic- exergetic and economical performance of a photovoltaic thermal system (PVT)
Canan Kandilli
Department of Mechanical
Engineering, Faculty of Engineering, Usak University, Usak, Turkey
Keywords
Abstract
Photovoltaic thermal system (PVT);
Water heating system;
Energy-exergy analysis;
Economical analysis
In this experimental
study, it is aimed to present a comparative study on the energetic-exergetic
and economical performance of the PVT system. A new and easy-handle approach
has been also developed to assess the exergetic performance of a PVT system.
Economical evaluation of both PV and PVT systems has been also performed by NPV
method. Useful energy rate, surface
temperature, electrical energy and overall energy efficiency, exergy
efficiency, exergy destruction values of PV and PVT systems have been compared.
It was found that the electrical efficiency, overall energy efficiency and
exergy efficiency of PVT system vary between 0.10 and 0.13; 0.26 and 0.54 and
0.10 and 0.12 respectively. It is found that the exergy and energy efficiency
values of the PVT system are greater than the exergy and energy efficiency
values of the PV system. It is calculated that the PVT system has considerably
short payback time after 8 years of operation; while the payback period of PV
was found as 16 years under the same meteorological conditions.
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