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Evaluation of Alternatives for Improving the Thermal Resistance of Window Glazing Edges

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  • Sihyun Park

    (Department of Architectural & Urban Systems Engineering, Ewha Womans University, Seoul 03760, Korea)

  • Seung-Yeong Song

    (Department of Architectural & Urban Systems Engineering, Ewha Womans University, Seoul 03760, Korea)

Abstract

To reduce condensation and ensure occupant comfort, the Korean Design Standard for Preventing Condensation in Apartment Buildings was enacted in 2014. However, glazing edges remain vulnerable to condensation. Because this design standard is recent, few window products satisfy the condensation resistance requirement for glazing edges, especially in the coldest region, and there have been limited investigations on improvement measures. This study evaluates and verifies various treatments for improving the glazing edge thermal resistance of double-glazed four-track horizontal sliding windows to reduce condensation risk and satisfy the design standard. Three-dimensional heat transfer simulations are performed for each alternative to obtain the surface temperature and temperature difference ratio ( TDR ) for the bottom edge of the glazing. The U-factors of the alternatives satisfying the required TDR for the coldest region are simulated, and the effects of increased local thermal resistance in the glazing edge on the U-factor of the window are analyzed. Mock-up tests are performed on the most economical and best-performing alternatives satisfying the coldest region TDR , and the TDR s and U-factors from the simulations and mock-up tests are compared to verify the performance of the most economical alternative. Insulating spacers, frame extensions, and low-emissivity coatings are effective in various cases.

Suggested Citation

  • 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.
  • Handle: RePEc:gam:jeners:v:12:y:2019:i:2:p:244-:d:197649
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    References listed on IDEAS

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    1. 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.
    2. Goopyo Hong & Daeung Danny Kim & Byungseon Sean Kim, 2016. "Experimental Investigation of Thermal Behaviors in Window Systems by Monitoring of Surface Condensation Using Full-Scale Measurements and Simulation Tools," Energies, MDPI, vol. 9(11), pages 1-16, November.
    3. Wanghee Cho & Shizuo Iwamoto & Shinsuke Kato, 2016. "Condensation Risk Due to Variations in Airtightness and Thermal Insulation of an Office Building in Warm and Wet Climate," Energies, MDPI, vol. 9(11), pages 1-25, October.
    4. Baldinelli, G. & Bianchi, F., 2014. "Windows thermal resistance: Infrared thermography aided comparative analysis among finite volumes simulations and experimental methods," Applied Energy, Elsevier, vol. 136(C), pages 250-258.
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    Cited by:

    1. Anatoliy M. Pavlenko & Karolina Sadko, 2023. "Evaluation of Numerical Methods for Predicting the Energy Performance of Windows," Energies, MDPI, vol. 16(3), pages 1-23, February.
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    3. Borys Basok & Borys Davydenko & Volodymyr Novikov & Anatoliy M. Pavlenko & Maryna Novitska & Karolina Sadko & Svitlana Goncharuk, 2022. "Evaluation of Heat Transfer Rates through Transparent Dividing Structures," Energies, MDPI, vol. 15(13), pages 1-16, July.
    4. 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.

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