The Study of Indoor Thermal Environment Characteristics of Office Building Effected by Stratum Ventilation

Abstract:

A typical office building with stratum ventilation as the research object was studied in this paper. CFX Fluid Computation software was used to numerical simulate the characteristics of indoor thermal environment effected by air speeds under 19°C supply air temperature and 8 ventilation rate. The numerical simulate results showed that, the obvious thermal stratification occurred in the vertical direction. Such thermal stratification met the demands of building energy conservation and the human thermal comfort. In this paper, the velocity coefficient and the temperature coefficient were used to evaluate thermal comfort. From the results of the numerical simulation, it could be seen that when the supply air speeds were controlled between 0.5m/s to 0.9m/s, the thermal comfort, as well as the air supply efficiency in the human activity area was relative satisfactory. With the constant fresh air ventilated to the breathing zone, the air quality could be improved.

• Periodical: Applied Mechanics and Materials (Volumes 556-562)
• Pages: 803-806
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.556-562.803
• Online since: May 2014
• Authors: Ze Qin Liu*, Zhen Jun Zuo, Tai Shun Liu
• Keywords: Indoor Thermal Environment, Numerical Simulation, Stratified Air Supply

References

[1] Lin Z, Chow TT, Tsang CF. Validation of a CFD model for Research into Stratum Ventilation. International Journal of Ventilation, 2006, 5(3): 345-363.

DOI: 10.1080/14733315.2006.11683751

[2] Lin Z, Chow TT, Tsang CF. Stratum ventilation- a conceptual introduction. Proceedings of the 10th International Conference on Indoor Air Quality and Climate, Beijing, 4 9 September 2005, pp.3260-3264.

[3] Lin Z, Chow TT, Tsang CF: Perceived control of stratum ventilation system. Proceedings of Clima 2007 Wellbeing Indoors, Helsinki, 10 14 June, 2007, pp.168-175.

[4] Lin Z, Chow TT: Stratum ventilation-A solution of high temperature air condition . Journal of Chemical Industry and Engineering，2005, 59(S2): 235-239.

[5] Lin Z: Stratum ventilation-a conceptual introduction/Proceedings of the 10th International Conference on Indoor Air Quality and Climate, Beijing, China. Sep 2005, pp.3260-3264.

[6] Chang Yuan, Liu Zeqin: Indoor thermal environment characteristics affected by different kinds of natural ventilation. Journal of Hebei University of Technology, 2012, 41(3): 68-72.