An international conference connecting people
in CAD research, education and business
Copyright (C) CAD Solutions, LLC. All rights reserved.
Proceedings of CAD'17, 2017, 95-99
Channel Geometry Optimization for Vertical Axis Wind Turbines in Skyscrapers
Abstract. The desire for introduction of clean energy in urban environments has led to some interest in the use of wind power integrated into modern cities; one way to do so is to integrate wind turbines into skyscrapers, as is seen in some recent architectural projects such as the Pearl River Tower in Guangzhou. Obviously we would like to maximize the power out from such a design, which is a function not only of the parameters of the Vertical Axis Wind Turbines (VAWT), but also on the patterns of prevailing winds in the location of the building, the topography of the surrounding environment, and the shape of the channel in the building where it is installed. In this paper, we shall explore how to optimize the shape of the channel when the other controlling factors have been determined. We focus on VAWT’s since they are generally better suited to urban environments due to ease of maintenance and lower noise. The approximate power generated by a VAWT’s is given by P_M=1/2 ρC_p U^3 (πd^2)/4, where ρ is the air density, d is the turbine diameter, U is the wind velocity, and Cp is the capacity factor, which is the ratio of the power generated to the available power, and is governed by the Betz limit to approximately 59% for Newtonian fluids. While VAWT’s may be installed in a few different configurations, we will limit this work to in-building duct installations, such as the one used in the Pearl River Tower in Guangzhou.
Keywords. Sustainable Architecture, Vertical Axis Wind Turbines, Green Buildings