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The Efficiency of Obtaining Electricity and Heat from the Photovoltaic Module under Different Irradiance Conditions

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  • Mariusz T. Sarniak

    (Faculty of Civil Engineering, Mechanics and Petrochemistry, Warsaw University of Technology, 09-400 Plock, Poland)

Abstract

This paper proposes a modification to the design of a standard PV module by enclosing the skeleton space and using forced ventilation. The purpose of this research was to develop a method for calculating the amount of heat gained during PV module cooling. A simplifying assumption was to omit the electrical energy consumed by the fans forcing the airflow. For testing at low irradiance, a prototype halogen radiation simulator of our own design was used, which is not a standardized radiation source used for testing PV modules. Two measurements were also made under natural, stable solar radiation. The modified PV module was tested for three ventilation rates and compared with the results obtained for the standard PV module. In all tested cases, an increase in electrical efficiency of about 2% was observed with increasing radiation intensity. The thermal efficiency decreased by about 5% in the analyzed cases and the highest value of 10.47% was obtained for the highest value of cooling airflow rate. In conclusion, the study results represent a certain compromise: an increase in electrical efficiency with a simultaneous decrease in thermal efficiency.

Suggested Citation

  • Mariusz T. Sarniak, 2021. "The Efficiency of Obtaining Electricity and Heat from the Photovoltaic Module under Different Irradiance Conditions," Energies, MDPI, vol. 14(24), pages 1-13, December.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:24:p:8271-:d:697959
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    References listed on IDEAS

    as
    1. Agata Zdyb & Slawomir Gulkowski, 2020. "Performance Assessment of Four Different Photovoltaic Technologies in Poland," Energies, MDPI, vol. 13(1), pages 1-17, January.
    2. Mariusz T. Sarniak, 2020. "Researches of the Impact of the Nominal Power Ratio and Environmental Conditions on the Efficiency of the Photovoltaic System: A Case Study for Poland in Central Europe," Sustainability, MDPI, vol. 12(15), pages 1-15, July.
    3. Jan Wajs & Aleksandra Golabek & Roksana Bochniak, 2019. "Photovoltaic Roof Tiles: The Influence of Heat Recovery on Overall Performance," Energies, MDPI, vol. 12(21), pages 1-12, October.
    4. Wajs, Jan & Golabek, Aleksandra & Bochniak, Roksana & Mikielewicz, Dariusz, 2020. "Air-cooled photovoltaic roof tile as an example of the BIPVT system – An experimental study on the energy and exergy performance," Energy, Elsevier, vol. 197(C).
    5. Vladimir Panchenko & Andrey Izmailov & Valeriy Kharchenko & Yakov Lobachevskiy, 2020. "Photovoltaic Solar Modules of Different Types and Designs for Energy Supply," International Journal of Energy Optimization and Engineering (IJEOE), IGI Global, vol. 9(2), pages 74-94, April.
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