wind turbines produce dc power.
wind turbines produce dc power.
do wind turbines produce ac or dc power?
dc
the use of undersized wind turbines in energy production in sustainable structures requires the consideration of many factors. in considering costs, small wind systems are generally more expensive than larger wind turbines relative to the amount of energy they produce. for small wind turbines, maintenance costs can be a deciding factor at sites with marginal wind-harnessing capabilities. at low-wind sites, maintenance can consume much of a small wind turbine's revenue. wind turbines begin operating when winds reach 8 mph, achieve energy production capacity at speeds of 32-37 mph, and shut off to avoid damage at speeds exceeding 55 mph. the energy potential of a wind turbine is proportional to the square of the length of its blades and to the cube of the speed at which its blades spin. though wind turbines are available that can supplement power for a single building, because of these factors, the efficiency of the wind turbine depends much upon the wind conditions at the building site. for these reasons, for wind turbines to be at all efficient, they must be installed at locations that are known to receive a constant amount of wind (with average wind speeds of more than 15 mph), rather than locations that receive wind sporadically. a small wind turbine can be installed on a roof. installation issues then include the strength of the roof, vibration, and the turbulence caused by the roof ledge. small-scale rooftop wind turbines have been known to be able to generate power from 10% to up to 25% of the electricity required of a regular domestic household dwelling. turbines for residential scale use are usually between 7 feet (2 m) to 25 feet (8 m) in diameter and produce electricity at a rate of 900 watts to 10,000 watts at their tested wind speed. building integrated wind turbine performance can be enhanced with the addition of an aerofoil wing on top of a roof mounted turbine.
sustainable architecture
wind turbines produce electricity at between two and six cents per kilowatt hour, which is one of the lowest-priced renewable energy sources. as technology needed for wind turbines continued to improve, the prices decreased as well. in addition, there is currently no competitive market for wind energy, because wind is a freely available natural resource, most of which is untapped. the main cost of small wind turbines is the purchase and installation process, which averages between $48,000 and $65,000 per installation. the energy harvested from the turbine will offset the installation cost, as well as provide virtually free energy for years.
wind turbine