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Determination of Equivalent Thermal Conductivity of Window Spacers in Consideration of Condensation Prevention and Energy Saving Performance

Author

Listed:
  • Mi-Su Shin

    (Department of Architecture, Seoul National University, Seoul 08826, Korea)

  • Kyu-Nam Rhee

    (Department of Architectural Engineering, Pukyong National University, Busan 48513, Korea)

  • Ji-Yong Yu

    (Building Business Unit, Division of Construction, Samsung C&T Corporation, Gyeonggi-do 13530, Korea)

  • Gun-Joo Jung

    (Department of Architectural Engineering, Pukyong National University, Busan 48513, Korea)

Abstract

This study investigated the impact of thermally improved spacers (TISs) on the condensation prevention and energy saving performances of residential windows. The temperature factor and total U-value were analyzed with the two-box model, by which the TISs are represented with the equivalent thermal conductivity. The results showed that the TISs could increase the temperature factor by up to 12%, and this significantly improved the condensation prevention performance. In addition, it was proved that the TIS enables the prevention of the condensation at an outdoor temperature that is 4.2 °C to 15.7 °C lower compared with the conventional spacer. Also, it was shown that the TISs reduce the total U-value by an amount from 0.07 W/m 2 K to 0.12 W/m 2 K, implying that the heat loss through the window is reduced by a rate from 2.8% to 8.2%. In addition, the results of the whole building energy simulation proved that the TISs can reduce the annual heating-energy consumption by a rate from 3.0% to 6.3%. The results were then used for the development of monographs to determine the equivalent thermal conductivity of a window spacer that can meet the performance criteria in terms of condensation prevention and energy saving.

Suggested Citation

  • Mi-Su Shin & Kyu-Nam Rhee & Ji-Yong Yu & Gun-Joo Jung, 2017. "Determination of Equivalent Thermal Conductivity of Window Spacers in Consideration of Condensation Prevention and Energy Saving Performance," Energies, MDPI, vol. 10(5), pages 1-21, May.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:5:p:717-:d:99050
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    References listed on IDEAS

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    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.
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    4. Mohamed F. Zedan & Sami Al-Sanea & Abdulaziz Al-Mujahid & Zeyad Al-Suhaibani, 2016. "Effect of Thermal Bridges in Insulated Walls on Air-Conditioning Loads Using Whole Building Energy Analysis," Sustainability, MDPI, vol. 8(6), pages 1-20, June.
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    Cited by:

    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. Seo-Hoon Kim & Jong-Hun Kim & Hak-Geun Jeong & Kyoo-Dong Song, 2018. "Reliability Field Test of the Air–Surface Temperature Ratio Method for In Situ Measurement of U-Values," Energies, MDPI, vol. 11(4), pages 1-15, March.
    3. Namhyuck Ahn & Sanghoon Park, 2020. "Heat Transfer Analysis of Timber Windows with Different Wood Species and Anatomical Direction," Energies, MDPI, vol. 13(22), pages 1-15, November.
    4. Seo-Hoon Kim & Jung-Hun Lee & Jong-Hun Kim & Seung-Hwan Yoo & Hak-Geun Jeong, 2018. "The Feasibility of Improving the Accuracy of In Situ Measurements in the Air-Surface Temperature Ratio Method," Energies, MDPI, vol. 11(7), pages 1-18, July.

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