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Sensitivity Analysis of Window Frame Components Effect on Thermal Transmittance

Author

Listed:
  • Giorgio Baldinelli

    (Department of Engineering, University of Perugia, Via Duranti, 67-06125 Perugia, Italy)

  • Agnieszka Lechowska

    (Department of Environmental and Power Engineering, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland)

  • Francesco Bianchi

    (Department of Physics and Geology, University of Perugia, Via Pascoli, 06123 Perugia, Italy)

  • Jacek Schnotale

    (Department of Environmental and Power Engineering, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland)

Abstract

Standard ISO 10077-2 gives the procedure to calculate thermal transmittances of window frames in 2D numerical simulations. It also introduces some examples of frame geometrical models with all necessary input data and the solutions so as to perform validation of the applied numerical tools. In the present paper, the models prepared with a commercial finite volume software of a PVC window frame were first positively validated with the results given in the Standard. An experimental test was then implemented to confirm the simulated data, with satisfactory agreement. The numerical code was used on one of the frames provided by the Standard to perform a sensitivity analysis of all the components and boundary conditions playing a role on the definition of the frame thermal transmittance, such as surface heat transfer coefficients, values of the solid thermal conductivity, emissivity and insulation properties of air gaps. Results demonstrate that the air gap properties represent the most influential parameters for the definition of the PVC window frames thermal transmittance, followed by the surface heat transfer coefficients and the PVC thermal conductivity. The rubber and the steel properties show a negligible effect on the whole frame performance. This procedure could constitute a design tool to guide the efforts of window manufacturers for the achievement of high performance products.

Suggested Citation

  • Giorgio Baldinelli & Agnieszka Lechowska & Francesco Bianchi & Jacek Schnotale, 2020. "Sensitivity Analysis of Window Frame Components Effect on Thermal Transmittance," Energies, MDPI, vol. 13(11), pages 1-12, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:11:p:2957-:d:369081
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    References listed on IDEAS

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    1. Zhang Yang & Takao Katsura & Masahiro Aihara & Makoto Nakamura & Katsunori Nagano, 2018. "Investigation into Window Insulation Retrofitting of Existing Buildings Using Thin and Translucent Frame-Structure Vacuum Insulation Panels," Energies, MDPI, vol. 11(2), pages 1-13, January.
    2. Ihm, Pyeongchan & Park, Lyool & Krarti, Moncef & Seo, Donghyun, 2012. "Impact of window selection on the energy performance of residential buildings in South Korea," Energy Policy, Elsevier, vol. 44(C), pages 1-9.
    3. Sihyun Park & Seung-Yeong Song, 2019. "Evaluation of Alternatives for Improving the Thermal Resistance of Window Glazing Edges," Energies, MDPI, vol. 12(2), pages 1-18, January.
    4. So Young Koo & Sihyun Park & Jin-Hee Song & Seung-Yeong Song, 2018. "Effect of Surface Thermal Resistance on the Simulation Accuracy of the Condensation Risk Assessment for a High-Performance Window," Energies, MDPI, vol. 11(2), pages 1-13, February.
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    Cited by:

    1. Younhee Choi & Akihito Ozaki & Haksung Lee, 2022. "Impact of Window Frames on Annual Energy Consumption of Residential Buildings and Its Contribution to CO 2 Emission Reductions at the City Scale," Energies, MDPI, vol. 15(10), pages 1-15, May.

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