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Thermal Performance of Dwellings with Rooftop PV Panels and PV/Thermal Collectors

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  • Saad Odeh

    (Senior Program Convenor, Sydney Institute of Business and Technology, Sydney City Campus, Western Sydney University, NSW 2000, Australia)

Abstract

To improve the energy efficiency of dwellings, rooftop photovoltaic (PV) technology is proposed in contemporary designs; however, adopting this technology will add a new component to the roof that may affect its thermal balance. This paper studies the effect of roof shading developed by solar PV panels on dwellings’ thermal performance. The analysis in this work is performed by using two types of software packages: “AccuRate Sustainability” for rating the energy efficiency of a residential building design, and “PVSYST” for the solar PV power system design. AccuRate Sustainability is used to calculate the annual heating and cooling load, and PVSYST is used to evaluate the power production from the rooftop PV system. The analysis correlates the electrical energy generated from the PV panels to the change in the heating and cooling load due to roof shading. Different roof orientations, roof inclinations, and roof insulation, as well as PV dwelling floor areas, are considered in this study. The analysis shows that the drop in energy efficiency due to the shaded area of the roof by PV panels is very small compared to the energy generated by these panels. The analysis also shows that, with an increasing number of floors in the dwelling, the effect of shading by PV panels on thermal performance becomes negligible. The results show that insensitivity of the annual heating and cooling load to the thermal resistance of rooftop solar systems is only because the total thermal resistance is dominated by roof insulation.

Suggested Citation

  • Saad Odeh, 2018. "Thermal Performance of Dwellings with Rooftop PV Panels and PV/Thermal Collectors," Energies, MDPI, vol. 11(7), pages 1-14, July.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:7:p:1879-:d:158728
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    References listed on IDEAS

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    1. Herrando, María & Markides, Christos N. & Hellgardt, Klaus, 2014. "A UK-based assessment of hybrid PV and solar-thermal systems for domestic heating and power: System performance," Applied Energy, Elsevier, vol. 122(C), pages 288-309.
    2. He, Wei & Chow, Tin-Tai & Ji, Jie & Lu, Jianping & Pei, Gang & Chan, Lok-shun, 2006. "Hybrid photovoltaic and thermal solar-collector designed for natural circulation of water," Applied Energy, Elsevier, vol. 83(3), pages 199-210, March.
    3. Chow, T.T., 2010. "A review on photovoltaic/thermal hybrid solar technology," Applied Energy, Elsevier, vol. 87(2), pages 365-379, February.
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    Cited by:

    1. M. M. Sarafraz & Mohammad Reza Safaei & Arturo S. Leon & Iskander Tlili & Tawfeeq Abdullah Alkanhal & Zhe Tian & Marjan Goodarzi & M. Arjomandi, 2019. "Experimental Investigation on Thermal Performance of a PV/T-PCM (Photovoltaic/Thermal) System Cooling with a PCM and Nanofluid," Energies, MDPI, vol. 12(13), pages 1-16, July.
    2. Liang Xie & Lai Fan & Dayu Zhang & Jixin Liu, 2023. "Passive Energy Conservation Strategies for Mitigating Energy Consumption and Reducing CO 2 Emissions in Traditional Dwellings of Peking Area, China," Sustainability, MDPI, vol. 15(23), pages 1-24, November.
    3. Primož Mavsar & Klemen Sredenšek & Bojan Štumberger & Miralem Hadžiselimović & Sebastijan Seme, 2019. "Simplified Method for Analyzing the Availability of Rooftop Photovoltaic Potential," Energies, MDPI, vol. 12(22), pages 1-17, November.

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