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Influence of Lighting Loads upon Thermal Comfort under CBAD and UFAD Systems

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  • Ki-Hyung Yu

    (Building Research Department, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do 411-712, Korea
    Department of Architecture, Hanyang University, 55 Hanyangdaehak-Ro, Sangrok-Gu, Ansan-Si, Gyeonggi-Do 426-791, Korea)

  • Seong-Hoon Yoon

    (Department of Architectural Engineering, Namseoul University, Seonghwan-Eup, Seobuk-Gu, Cheonan-Si, Chungcheongnam-Do 331-707, Korea)

  • Hae-Kwon Jung

    (Building Research Department, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do 411-712, Korea)

  • Kee Han Kim

    (Research Institute of Industrial Science, Hanyang University, 222 Wangsimni-Ro, Seongdong-Gu, Seoul 133-791, Korea)

  • Kyoo-Dong Song

    (Department of Architecture, Hanyang University, 55 Hanyangdaehak-Ro, Sangrok-Gu, Ansan-Si, Gyeonggi-Do 426-791, Korea)

Abstract

Under-floor air distribution (UFAD) systems are occupied-area-based air conditioning systems that generally offer advantages over ceiling-based air distribution (CBAD) systems in terms of energy efficiency and thermal comfort; accordingly, UFAD systems have become more popular lately. The purpose of this study is to provide reasonable UFAD application conditions by comparing and analyzing the influences of cooling loads when UFAD and CBAD are applied to thermally control indoor environments. A chamber experiment was conducted to allow comparisons of the indoor thermal environment under CBAD and UFAD, with the experimental variables of the thermal load of the occupied area and the supply airflow rate. In conclusion, the lower the supply airflow and the higher the lighting power density, the more the thermal comfort of the indoor environment could be improved by using UFAD instead of CBAD. In the lighting power density range of 0–30 W/m 2 , correlations were calculated whereby the lighting power density levels could be predicted that would ensure thermal comfort at a desired level.

Suggested Citation

  • Ki-Hyung Yu & Seong-Hoon Yoon & Hae-Kwon Jung & Kee Han Kim & Kyoo-Dong Song, 2015. "Influence of Lighting Loads upon Thermal Comfort under CBAD and UFAD Systems," Energies, MDPI, vol. 8(6), pages 1-19, June.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:6:p:6079-6097:d:51343
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    Citations

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    Cited by:

    1. Chul-Ho Kim & Seung-Eon Lee & Kwang-Ho Lee & Kang-Soo Kim, 2019. "Detailed Comparison of the Operational Characteristics of Energy-Conserving HVAC Systems during the Cooling Season," Energies, MDPI, vol. 12(21), pages 1-29, October.
    2. Chul-Ho Kim & Seung-Eon Lee & Kang-Soo Kim, 2018. "Analysis of Energy Saving Potential in High-Performance Building Technologies under Korean Climatic Conditions," Energies, MDPI, vol. 11(4), pages 1-34, April.
    3. Yaming Fan & Xiangdong Li & Minfeng Zheng & Rengui Weng & Jiyuan Tu, 2020. "Numerical Study on Effects of Air Return Height on Performance of an Underfloor Air Distribution System for Heating and Cooling," Energies, MDPI, vol. 13(5), pages 1-17, March.

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