摘要
地板孔板通风作为一种全新的通风方式,不仅送风速度大且增大了空气混合度,近年来受到了越来越多的关注。针对一个典型的建筑室内房间,实验测试了在地板孔板通风方式下人体前后侧0.2m处、距排风口0.2m处沿高度方向室内空气温度分布情况以及房间黑球温度和各壁面中心温度。对比分析了不同送风速度、送风温度和人体散热强度条件下,地板孔板通风射流诱发的强制对流与人体热羽流形成的自然对流之间的耦合作用所影响下的人体微环境形成机制以及人体热舒适特征。同时,确定了在地板孔板通风方式下不同送风速度、送风温度对调控和改善人体微环境和热舒适性的有效性与敏感性。结果发现,从人体足部到头部区域,背侧温度和胸侧温度均呈现先升高后降低的变化趋势,背侧温度峰值出现在离地面1.6m处左右而胸侧温度峰值出现在离地面1.2m处左右。同时,室内温度在垂直方向上起伏变化。房间壁面中心温度和黑球温度主要受人体发热量与送风温度的影响,发热量越大,送风温度越高,房间壁面中心温度和黑球温度越高。研究结果将为地板孔板通风方式下合理选择送风条件以改善室内人体热舒适提供理论指导。
As one new type ventilation, floor perforated panel ventilation not only has high ventilation effectiveness but also increases the degree of air mixing, which has attracted more and more attention in recent years. As to a typical building space, dislribution of air temperature on 0.2m front and behind human body, different height indoor air temperature at 0.2m away from the ventilation outlet, globe temperature in the space and wall temperature under floor perforated panel ventilation were tested in this present study. The formation mechanism of human micro-thermal environment and characteristics of human thermal comfort were analyzed for different ventilation airflow rate, supply air temperature and heat gain from human body. The results show that air temperature on the both front and back of human body from human foot to the head region emerge a trend of rise firstly but fall then. The temperature peak values of back and front human body appear at the height of about 1.6m and 1.2m, respectively. Meanwhile, the temperature that 0.2m away from the ventilation outlet shows a significant fluctuation along the height direction. Wall temperature and globe temperature are mainly affected by the heat gain from human body and supply air temperature. When the heat gain and the airflow temperature are greater, the wall temperature and globe temperature will be higher. The results from this paper may provide theoretical guidance forreasonably choosing ventilation conditions to improve indoor human thermal comfort under floor perforated panel ventilation.
出处
《制冷与空调（四川）》
2015年第5期556-559,573,共5页
Refrigeration and Air Conditioning
基金
国家自然科学基金资助项目(51308361)
四川省科技计划项目(2014GZ0133)
关键词
地板孔板送风
送风温度
送风速度
人体发热量
体表热环境
Floor perforated panel ventilation
Ventilation airflow rate
Supply air temperature
Heat gain from human body
Human body micro-thermal environment.
