Building Shape On The Wind Energy Research

Along with the global economy development, the energy consumption is increasing gradually, especially, consuming the fossil energy lead to global climate problem and make the living environment terrible. In order to achieve sustainable development of economy and society, the people become aware the importance of developing green energy. Wind energy is not only a clean, pollution-free renewable energy, but also has the advantage of transportation in used the building environment. But in most parts of the city, the velocity of wind doesn't satisfy the highest power output of wind turbine, so some research is done to increase the wind speed.This paper is based on the use of wind energy in the building environment. The theoretical analysis and numerical simulation method are used to analysis the wind speed increasing effect by simulating different shape of the roof and different kinds of Wind Speed Increased Devices (WSID). The installation location of WSID is study to achieve high power output efficient.The simulation adopts Renormalization Group k-εmodel. To increase the wind turbine power output by the following aspects. Firstly, five kinds of building roof are analyzed on flow field, such as flat roof, double bevel roof, hemicycle roof, single bevel roof and arc roof. The results show that arc roof have a greater effect of wind speed than the others; For arc roof of the building also analysis and discussion on the different degrees of roof and different width of arc architectural which can intensify the effects of wind concentration and wind energy utilization is gained. Furthermore, this article also pays great attention to intensify of wind speed structure, The influence factors of structure size are analyzed, On this foundation, the location of Channel radian and channel length are also analyzed. In the end, great efforts are made to optimize setting intensify of wind speed structure in the position of the roof; the optimal layouts which are beneficial to the effect of wind utilization are gained. Finally, the installation location of WSID is optimized to achieve high power output efficient.Conclusions are obtained based on theoretical analysis and numerical simulation. It shows that the building roof with curvature of 0.3-0.6 has good effect on the wind energy increasing, while the size of WSID's throat is 2.6m, with the length 10m and the height of the wind opening mouth is 3m-6m. When the location of WSID is 2m higher than the roof, the wind turbine has the highest power output efficient. The building roof with different curvature is studied, and experiment is done to verify the simulation and analysis result. Compared the experiment result with the simulating result, it shows that they agree with each other well, so numerical simulation can be used as the powerful tool to analysis the complex flow field around the building.