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Packing Factor Effects on the Performance of Photovoltaic Module for a Given Module Area

In this paper, an effort has been performed to investigate the influence of packing factor (βc) on the performance of a fully covered semi-transparent photovoltaic (PV) module having 2.1 m2 module areas. Based on the basic energy balance equation, the mathematical expressions for temperature of solar cell and electrical efficiency of solar cell have been derived in the terms of design and climatic parameters. The performance parameters of PV module, namely, temperature of solar cells, electrical efficiency of solar cells and module, electrical power and overall electrical energy output have been calculated at different values of packing factor. The numerical computations have been accomplished by using MATLAB R2015a. The analyses have been performed by taking different values of packing factor such as 0.89, 0.75, 0.50 and 0.25. From results and discussion, it has been procured that (a) the solar cell electrical efficiency increases and the module efficiency decrease with the decrease in packing factor and (b) the electrical power output of photovoltaic module decreases with the decrease in packing factor. It is also concluded that low packing factor of fully covered semi-transparent PV module is most suitable for designing of the photovoltaic thermal (PVT) system.