Application and Analysis Chilling Ceiling Combined with Displacement Ventilation System in Office Buildings

Abstract:

Using the method of computational fluid dynamics (CFD), numerically simulates office building with chilling ceiling /displacement ventilation (CC/DV) and analyzes indoor airflow velocity field, temperature field and thermal stratification height of the building. Consider that the CC/DV system can improve indoor air quality and save energy. And the CC/DV system could solve many constraints of displacement ventilation system. when the cooling load is large, due to the limit of air supply and temperature supply the displacement ventilation system can not be used, but the CC/DV system could well satisfied the requirement of body. The CC/DV system also has the problem of lower thermal stratification height because the chilling ceiling has a lower temperature.

• Periodical: Advanced Materials Research (Volumes 160-162)
• Pages: 294-300
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.160-162.294
• Online since: November 2010
• Authors: Ling Wang, Wei Yang Qi, Ri Chao Liu, Shun Jun He
• Keywords: Chilling Ceiling, Displacement Ventilation, Temperature Field, Thermal Stratification Height, Velocity Field

References

[1] Hodder S G, Loveday D L, Parsons K C, Taki A H. Thermal comfort in chilled ceiling and displacement ventilation environment: vertical radiant temperature asymmetry effects. Energy and Buildings, 1998, 27(2): 167-173.

DOI: 10.1016/s0378-7788(97)00038-8

[2] Novoselac A, Srebric J. A critical review on the performance and design of combined cooled ceiling and displacement ventilation systems. Energy and Buildings, 2002, 34: 497-509.

DOI: 10.1016/s0378-7788(01)00134-7

[3] Sodec F. Economic viability of cooling ceiling systems[J]. Energy and Buildings, 1999 (30), 195-201.

DOI: 10.1016/s0378-7788(98)00087-5

[4] Niu J, Kooi J V D, Ree H V D. Energy saving possibilities with cooled-ceiling system [J]. Energy and Buildings . 1995 (23): 147-158.

DOI: 10.1016/0378-7788(95)00937-x

[5] Novo selac A, Srebric J. A critical review on the performance and design of combined cooled ceiling and displacement ventilation [J]. Energy and Buildings . 2002 (34), 497-509.

DOI: 10.1016/s0378-7788(01)00134-7

[6] Matson U. Comparison of the modeling and the experimental results on concentrations of ultra-fine particles indoors. Building and Environment, 2005, 40(7): 996-1002.

DOI: 10.1016/j.buildenv.2004.09.001

[7] Yu Haiming, Yang Guozhong. fluid dynamics [M]. Haerbin: MAPS PRESS. (2008).

[8] Tao wenquan, Numerical heat transfer (Second edition), [M], Xi'an: Xi'AN JIAOTONG UNIVERSITY PRESS, (2001).

[9] Zhao B, Li X, Zhang Z, Huang D. Comparison of diffusion characteristics of aerosol particles in different ventilated rooms by numerical method. ASHRAE Trans, 2004, 110: 88-95.

[10] Zhao B, Zhang Y, Li X, Yang X, Huang D. Comparison of indoor aerosol particle concentration and deposition in different ventilated rooms by numerical method. Building and Environment, 2004, 39(1): 1-8.

DOI: 10.1016/j.buildenv.2003.08.002

[11] Lau J, Chen Q. Floor-supply displacement ventilation for workshops. Building and Environment, 2007, 42(4): 1718-1730.

DOI: 10.1016/j.buildenv.2006.01.016

[12] Huang Xiang, Yu Hongwei, Chen Shu'ai. Comparison of Different Types of Ventilation in Combined System of Chilled Ceiling to Investigate the Effect of Indoor Air Quality [J]. Contamination Control & Air-Condition Technology, 2008. 6(2)18-23.

[13] Yu Songbo, Tu Guangbei, Na Yanling. Application and analysis of displacement ventilation in office buildings [J]. Heating Ventilating & Air conditioning, 2003 (3)99-101.

[14] Ma Renmin, Lian Zhiwei. Some question in displacement ventilation [J]. Heating Ventilating & Air conditioning, 2000 (4)18-22.

[15] Yu Songbo. Influence of cooled ceiling on displacement ventilation system: CFD study . [ Master's degree paper]. Tian Jin: Tianjin University. (2003).

[16] Wang Jinsheng, Long Weiding. Met hodology of avoiding co ndensation and downdraft in displacement ventilation plus cooling ceiling system[J]. Heating Ventilating & Air conditioning, 2009 (1)27-31.