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Tilt Angle Adjustment for Incident Solar Energy Increase: A Case Study for Europe

Author

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  • Dragos Machidon

    (Power Engineering Department, Faculty of Electrical Engineering, “Gheorghe Asachi” Technical University, 700050 Iasi, Romania)

  • Marcel Istrate

    (Power Engineering Department, Faculty of Electrical Engineering, “Gheorghe Asachi” Technical University, 700050 Iasi, Romania)

Abstract

The work presented in this paper aims to analyze the efficiency of using optimum tilt angles defined for several time intervals to maximize the incident solar irradiation on a certain surface deployed in Europe. Such a technique would improve the solar energy harvesting process, both for photovoltaic panels and solar thermal collectors, while not investing in the more expensive sun-tracking devices. The optimum tilt angles have been determined for the yearly, bi-annual, seasonal, and monthly time intervals, which were delimited on a calendar and astronomical base, respectively, considering multiple locations from Europe, and using various mathematical models based on empirical equations and solar irradiation estimation. The total incident solar irradiation provided by adjusting the tilt angle multiple times per year was calculated and compared to that obtained when using the yearly optimum tilt angle. The gains for each type of adjustment were investigated, and the monthly optimization of the tilt angle is obviously the most effective one, ensuring gains of up to 7%, depending on the considered latitude. Otherwise, an optimization twice per year, using the bi-annual optimum tilt angles determined for the astronomical-defined warm and cold seasons, would be the next best solution.

Suggested Citation

  • Dragos Machidon & Marcel Istrate, 2023. "Tilt Angle Adjustment for Incident Solar Energy Increase: A Case Study for Europe," Sustainability, MDPI, vol. 15(8), pages 1-12, April.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:8:p:7015-:d:1129646
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    References listed on IDEAS

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