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The impact of array inclination and orientation on the performance of a grid-connected photovoltaic system

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  • Mondol, Jayanta Deb
  • Yohanis, Yigzaw G.
  • Norton, Brian

Abstract

The impact of PV surface orientation and inclination on grid-connected photovoltaic system performance under maritime climates was investigated using validated TRNSYS simulations. Insolation, PV output, PV efficiency, inverter efficiency, system efficiency, performance ratio (PR) and PV savings were estimated annually, seasonally and on monthly bases for various surface inclinations and orientations. Incident insolation and PV output were maximum for a surface with inclination 30° facing due south and minimum for a vertical surface with orientation 90° east or west from south. The monthly optimum collection angle maximising incident insolation varied from 10° to 70°. For the particular location and system studied, the maximum annual PV efficiency, the inverter efficiency, the PR and the system efficiency were for a south-facing surface with an inclination of 20°. For a horizontal surface, the monthly variation of system parameters was significant over a year. For time-dependent tariff rates, the annual PV savings were higher for a system oriented with same orientation towards the west than east from south while for constants tariff rates, the PV savings was the same for east or west orientation from south.

Suggested Citation

  • Mondol, Jayanta Deb & Yohanis, Yigzaw G. & Norton, Brian, 2007. "The impact of array inclination and orientation on the performance of a grid-connected photovoltaic system," Renewable Energy, Elsevier, vol. 32(1), pages 118-140.
    • Handle: RePEc:eee:renene:v:32:y:2007:i:1:p:118-140
    DOI: 10.1016/j.renene.2006.05.006
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