内置格栅诱导通道的太阳能通风墙性能

Analysis on Performance of a Solarinduced Ventilation Wall with Buildin Grille Induced Channel

摘要:

提出一种利用太阳能和风能实现室内自然通风的新型内置格栅诱导通道的太阳能通风墙模型，通过三维数值模拟研究在不同室外风速和太阳辐射强度下结构参数对其通风性能的影响.结果表明，内置格栅诱导通道可以有效利用室外风形成对太阳能通风墙主通道内气流的诱导作用而强化自然通风；该太阳能通风墙通风量随格栅间距与格栅高度比值的增加先增大后减小，存在最佳比值使通风量最大；随着风诱导通道宽度与主通道宽度比值的增加，不同室外风速下的通风量均呈先增大后减小的变化趋势.

Abstract:

A new solarinduced ventilation wall with grille induced channel, which utilize solar energy and wind energy to cause indoor natural ventilation, was proposed. The effects of structural parameters on the ventilation performance of the new structure were studied at different outdoor wind speed and solar radiation intensity by threedimensional computational fluid dynamics method. The results showed that the builtin grille induced channel can utilize the induction of outdoor wind in formation of main channel of solarinduced ventilation wall to strengthen natural ventilation. The mass flow rate of the new solarinduced ventilation wall firstly increases, and then decreases with the increase of the ratio of grille spacing to grille height, there is an optimum ratio for the maximum of mass flow rate. With the increase of the ratio of wind induced channel width to main channel width, the mass flow rate of the solarinduced ventilation wall under different outdoor wind speed firstly increases and then decreases.