All Issue

2018 Vol.12, Issue 4

Research Article

Downdraft Assessment of the Office Buildings with Radiant Ceiling Heating System

천장복사난방시스템이 적용된 사무소 건물에서의 downdraft 평가

Goo-Sang Joe1
,
Dong-Woo Kim1
,
Woong-June Chung1
,
Uk-Joo Seong2
,
Myoung-Souk Yeo1*
조 구상1
,
김 동우1
,
정 웅준1
,
성 욱주2
,
여 명석1*
1Department of architecture and architectural engineering, Seoul National University
2Korea Conformity Laboratories, Jincheon, Korea
1서울대학교 건축학과
2한국건설생활환경시험연구원
* Corresponding Author
31 August 2018. pp. 303-312
PDF XML Citation
Abstract

Radiant ceiling heating system radiates heat to the surrounding surfaces including the cold interior surface of the window. The cold window surface, without heating system, loses heat via transmission to the cold outside. It can be caused thermal discomfort by downdraft. Downdraft is unwanted local cooling of the body caused by air movement. Therefore it is more likely to occur when air temperature is lower and air velocity is higher. The objective of this study is to find out the appropriate conditions of radiant ceiling heating system to prevent thermal discomfort by analyzing the indoor air temperature and air velocity distribution in office space. A computational model of a room with radiant ceiling heating system is constructed within the CFD program Star CCM+. Six cases of radiant ceiling heating system with varying surface temperatures, surface areas and window U-value are considered.

Keywords
Thermal comfort
Downdraft
Radiant Ceiling Heating System
CFD Simulation

키워드
열쾌적성
다운드래프트
천장복사난방시스템
CFD 시뮬레이션
References
1
조구상, 박소정, 신대욱, 이태하, 여명석, 김광우. (2015). 바닥복사난방이 적용된 사무소 건물의 Downdraft 평가에 관한 연구. 대한건축학회 논문집, 31(4), 203-212.
2
Heiselberg, P. (1994). Draught risk from cold vertical surfaces. Building and Environment, 29(3), 297-301.
10.1016/0360-1323(94)90026-4
3
Joe, G., Kim, D., Park, S., Park, S., Yeo, M., & Kim, K. (2017). Downdraft Assessment of Glass Curtain Wall Buildings with a Radiant Floor Heating System. Applied Sciences, 7(10), 1075-1097.
10.3390/app7101075
4
Koestel A., (1957). Path of horizontally projected heated and chilled air jets, Transactions of the American Society of Heating and Air-Conditioning Engineers, 61, 213-232.
5
Myhren, J. A., & Holmberg, S. (2008). Flow patterns and thermal comfort in a room with panel, floor and wall heating. Energy and Buildings, 40(4), 524-536.
10.1016/j.enbuild.2007.04.011
6
Shia-hui, P., & Peterson, F. (1995). Convection from a cold window with simulated floor heating by means of a transiently heated flat unit. Energy and buildings, 23(2), 95-103.
10.1016/0378-7788(95)00933-7
7
Tye-Gingras, M., & Gosselin, L. (2012). Comfort and energy consumption of hydronic heating radiant ceilings and walls based on CFD analysis. Building and Environment, 54, 1-13.
10.1016/j.buildenv.2012.01.019
8
Zukowski, M. (2007). A new formula for determining a minimum recommended value of inlet air velocity from UFAD system to prevent occupants from draught risk. Building and environment, 42(1), 171-179.
10.1016/j.buildenv.2005.08.024
9
Eckert E.R.G., Thomas W. Jackson. (1951). Analysis of turbulent free-convection boundary layer on flat plate. NACA Report.
10
Joe, G.S., Park, S.J., Lee, S.G., Shin, D.U., Yeo, M.S., Kim, K.W. (2013). A Study on the Application of Radiant Floor Heating System to Prevent Downdraft in Glass Curtain-wall Buildings, CLIMA 2013 : 11th REHVA World Congress & 8th International Conference on IAQVEC. June 16-19 Prague Congress Centre, Czech Republic.
11
ANSI/ASHRAE. Standard 55. (2013). Thermal environmental conditions for human occupancy. Atlanta: ASHRAE.
12
ISO 11855-1. (2012). Building environment design — Design, dimensioning, installation and control of embedded radiant heating and cooling systems.
Information
  • Publisher :Korean Institute of Architectural Sustainable Environment and Building Systems
  • Publisher(Ko) :한국건축친환경설비학회
  • Journal Title :Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
  • Journal Title(Ko) :한국건축친환경설비학회논문집
  • Volume : 12
  • No :4
  • Pages :303-312
  • Received Date : 2018-08-17
  • Revised Date : 2018-06-24
  • Accepted Date : 2018-08-03
  • DOI :https://doi.org/10.12972/jkiaebs.20180026
Journal Informaiton Journal of Korean Institute of Architectural Sustainable Environment and Building Systems Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
Manuscript Submission
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close