바닥공조시스템에서 복사온도가 열적 쾌적성에 미치는 영향

다국어 초록 (Multilingual Abstract)

Despite the fact that UFAD(Under Floor Air Distribution) systems have many benefits and are being applied in the field in increasing numbers, there is a strong need for an improved fundamental understanding of several key performance features of these systems. This study numerically investigates the effect of supplied air temperature and supplied flow rate on the performance of UFAD, especially focused on thermal comfort. Also this study has compared UFAD with conventional overhead air distribution system. In contrast to the well-mixed room air conditions of the conventional overheat system, UFAD system produces an overall floor-to-ceiling airflow pattern that takes advantage of the natural buoyancy produced by heat sources in the occupied zone and more efficiently removes heat loads and contaminants from the space. Thermal comfort parameters were evaluated by CFD approach and then PMV was computed to detect the occupants' thermal sensation. Results show that radiative mean temperature plays crucial role on the evaluating PMV. Until now, the radiative temperature has been the missing link between CFD and thermal comfort, but the present study paves the way for overcoming this weakness.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 해석
• 3. 결과 및 고찰
• 4. 결론
• 참고문헌

참고문헌 (Reference)

1 김세환, "바닥취출 및 흡입시스템 공조방식에서 취출조건 변경시 실내공기환경 평가" 대한설비공학회 17 (17): 397-403, 2005

2 Krepchin, I., "Underfloor air systems gain foothold in North America" Boulder, Colo. : Financial Times Energy, Inc. 2001

3 Daly, A., "Underfloor air distribution : Lessons learned" 44 : 21-24, 2002

4 Bauman, F.S., "Underfloor air distibution (UFAD) design guide" ASHRAE, Inc. 2003

5 Fanger, P.O., "Thermal comfort-Anaysis and application in environmental engineering" Danish Technical Press 1970

6 Kim, J., "Thermal comfort of the floor supply air conditioning system for different supply-return location s during cooling" 12 : 476-485, 2000

7 "STAR-CD, User’s Guide, Version 3.15."

8 Bausman, F., "Outlook for Underfloor Air Distribution" 43 : 18-25, 2001

9 "ISO Standard 7730, Moderate thermal environments-Determination of PMV and PPD indices and specification of the condition for thermal comfort, International Standards Organization, Geneva"

10 Meyer, C., "Being comfortable with STAR-CD" 22 : 21-22, 2004