CFD ANALYSIS OF AIRFLOW CHARACTERISTICS IN OFFICE ROOM WITH TASK AIR-CONDITIONING AND NATURAL VENTILATION
CFD ANALYSIS OF AIRFLOW CHARACTERISTICS IN OFFICE ROOM WITH TASK AIR-CONDITIONING AND NATURAL VENTILATION
复制标题
任务空调自然通风办公室气流特性CFD分析
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
T. Ushio
中科院分区：
文献类型：
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作者：
Eunsu Lim;K. Sagara;T. Yamanaka;H. Kotani;N. Mishima;S. Horikawa;T. Ushio
采用CFD分析方法，对采用混合空调系统的办公房间的室内气流组织进行了研究。该混合空调系统由任务区的地板送风口和环境区的自然风口组成。测量数据(Kotani等人2006)作为CFD各自然风口和工位风口流量的边界条件。为了研究自然通风开口位置的影响，制作了两种不同位置的自然通风模型：一种是天花板下有自然通风开口的情况(“天花板模型”；Lim等人)。另一种是窗侧附近有自然通风开口的情况(“反模型”)。结果表明，顶板模型比顶板模型能更广泛地向入住区提供新风。此外，还利用天花板模型进行了CFD分析，考察了室外空气条件(风向、风速和室外温度)的影响。结果表明，北风条件下的新风分布比西风条件下的更均匀。在西风条件下，西侧地区自然通风口的SVE4最高。
The performance of indoor airflow for the office room with the hybrid air-conditioning system has been investigated by means of CFD analysis. The hybrid air-conditioning system is composed of under floor air supply outlets for task zone and the natural ventilation openings for ambient zone. The measured data (Kotani et al. 2006) at the office room in existence was used as the boundary condition of the flow rate of each natural ventilation opening and task flow outlets for CFD. To investigate the influence of location of the natural ventilation opening, two models with different location of openings for natural ventilation were made; one is the case with openings for natural ventilation under the ceiling (“ceiling-model”; Lim et al. 2007) and the other is the case with openings for natural ventilation near the window side (“counter-model”). It was made clear that the ceiling-model can supply the fresh air more widely to the occupancy zone than counter-model. Moreover, CFD analysis using ceiling-model was conducted to investigate the influence of the outdoor air condition (wind direction, wind velocity and outdoor temperature). As the results, the distribution of fresh air under the north wind is more uniform than that of the west wind. Under the west wind, SVE4 of natural ventilation openings is highest in the west-side zone.