摘要
加肋重型墙体是利用围护结构热惯性去除建筑室内发热量的一种被动控制室温技术。本文建立了16种不同形式肋片的物理模型,利用CFD数值模拟与正交试验相结合的方法,研究肋片高度、厚度、间距以及肋片布置位置对墙体释冷特性的影响。结果显示,肋片高度对时间常数有一定影响,而肋片间距、厚度以及布置位置对时间常数的影响不显著;对释冷速率远期稳定值而言,肋片间距及肋片厚度的影响显著,而肋片的布置位置和肋片高度的影响不显著。肋片布置位置主要影响对流换热系数的发展稳定性,从而影响室内温升的波动情况。
16 models of different types of ribs are established to study the influence of rib height, pitch, thickness and arrangement on cold energy release characteristics. In this paper, CFD numerical simulation is combined with orthogonal experiment method. The results showed rib height had some impact on time response, while the influence of rib pitch,thickness and arrangement is insignificant. For long-term stable value, the influence of rib pitch and thickness is remarkable, while that of arrangement and rib height is insignificant. Fin arrangement positions primarily affect the development of the stability of the convective heat transfer coefficient, thus affecting the fluctuation of indoor temperature rise.
出处
《建筑热能通风空调》
2015年第1期10-14,共5页
Building Energy & Environment
关键词
被动控制技术
加肋墙体
正交试验
时间常数
passive control technology
heavy ribbed wall
orthogonal experiment
time constant
