Wind System Towers

As discussed in Chapters 2 and 3ยป it is often best to support your windsystem, be it vertical-axis or horizontal-axis, to capture the higher winds above the ground and to be well above the nearest trees. Supporting a wind turbine that weighs several hundred pounds is no simple task and requires a rigid structure of some sort. Towers are subjected to two types of loads, as illustrated in Figure 5-44: weight, which compresses the tower downward, and drag, which tries to bend the tower downwind.

Towers are made in two basic configurations: guy-wire supported, and cantilever or unsupported (sometimes called freestanding) (Fig. 5-45). Also, given these two basic structural support configurations, towers are made with telephone poles, pipes (Fig. 5-46), or other single column structures, as well as lattice frameworks of pipe (Fig. 5-47), or wooden boards.

Regardless of which tower design you select, the overriding consideration is the selection of a tower that can support the wind turbine you '.elect in the highest wind possible at your site. Of course, cost must ?l30 be considered. The load that causes man>

WIND MACH If'E WEIGHT

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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