冬冷夏热地区太阳能烟囱热通道的数值模拟和实验研究

Numerical Simulation and Experimental Study on Solar Energy Chimney Thermal Channel in the Cold Winter and Hot Summer Area

针对不同热通道宽度的竖直式太阳能烟囱,借助数值模拟方法结合实验测试分析方法研究了在我国冬冷夏热地区太阳能烟囱热通道的传热和流动特性。研究结果表明,随着热通道高度的增加通道内空气温度逐渐上升,形成热浮力加速空气自然对流;同时太阳能烟囱热通道的宽度直接影响通风量的大小,当太阳能烟囱热通道的宽度超过0.6 m时,热通道内部和出风口处出现回流现象阻碍空气流动,太阳能烟囱通风量最佳时所对应的热通道宽度为0.6 m;此外通过在未考虑室外风环境影响下的数值模拟结果与室外实验分析结果的差异可知,在建太阳能烟囱热通道设计与数值模拟时,应考虑室外风环境的影响。

For the different thermal channel width of vertical solar energy chimney, research use numerical simulation method combine with experimental analysis method study the heat transfer and flow characteristics of solar energy chimney thermal channel in the cold winter and hot summer area of our country. The results show that with the thermal channel height increases the air temperature is gradually rising in the channel. Fore1 the thermal buoyancy accelerate the air natural convection. At the same time the chimney thermal channel width directly affects the quantity of ventilation. When the solar energy chimney thermal channel with a width of more than 0.6 m. The inside of thermal channel and the air outlet appear backflow phenomenon hinder the air flow. When the ventilation of the solar energy chimney reached the best the corresponding width of thermal channel is 0.6 m. In addition, according to the difference between the outdoor experiment results and the numerical simulation results which without considering the influence of outdoor wind environment. It should consider the influence of outdoor wind environment when design and numerical simulation of solar energy chimney thermal channel.