层式通风不同送风方式对办公室气流组织特性的影响研究
度分布更为均匀。
3 结论
本文利用层式通风这种新型的送风方式在供暖工况下对房间内的温度场、速度场、CO2浓度场以及空气龄进行了测试,并对比了不同送风方式下温度、速度、CO2浓度以及空气龄的差异。由以上分析可以得出:
1 层式通风运用在冬季供暖工况时,和平送风相比,向下送风室内下部区域温度较高,更能够满足热舒适性要求,且对新风的利用更为高效;
2 层式通风运用在冬季工况时,向下送风对改善呼吸区的空气品质效果并不显著,但对于整个房间的排污效率应高于平送风。
参考文献
[1] ASHRAE. 2010. ANSI/ASHRAE Standard 55-2010, Thermal Environmental Conditions for Human Occupancy, Atlanta: American Society of Heating, Refrigerating, and Airconditioning Engineers, Inc.
[2] 林章,周天泰等,层式通风——高温空调下的出路[J].化工学报,2005,59(S2):235-239. [3] L. Tian, Z. Lin, J. Liu, Q.W. Wang, Numerical study of indoor air quality and thermal comfort under stratum ventilation, Progress in Computational Fluid Dynamics. 2008: 541-548.
[4] L. Tian, Z. Lin, Q.W. Wang, J. Liu, Comparison of gaseous contaminant diffusion under stratum ventilation and under displacement ventilation, Building and Environment. 2010,45(9) 2035-2046. [5] L. Tian, Z. Lin, Q.W. Wang, J. Liu, Numerical investigation of indoor aerosol particle dispersion under stratum ventilation and under displacement ventilation, Indoor and Built Environment. 2009,18(4):360-375.
[6] ML Fong, Z Lin, KF Fong, TT Chow, T Yao, 2011. Evaluation of thermal comfort conditions in a classroom with three ventilation methods. Indoor Air, in press.

