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

Ki-Hyung Yu, Seong-Hoon Yoon, Hae-Kwon Jung, Kee Han Kim and Kyoo-Dong Song
Additional contact information
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
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

Energies, 2015, vol. 8, issue 6, 1-19

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.

Keywords: ceiling-based air distribution system (CBAD); under-floor air distribution system (UFAD); thermal comfort; predicted mean vote (PMV); cooling load of artificial lighting (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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