Wind speeds and other weather factors make a bigger difference to power output than a turbine's parts. With only soft breezes, it will generate just a handful of watts.Ĭalculating the real power output of a wind turbine in watts involves multiplying the mechanical efficiency by the wind speed, air density, and rotor blade length. The turbine puts out a maximum of 10 kW under perfect conditions, so it could theoretically generate 10 kW for 24 hours a day 365 days a year, or 87,600 kW per year. home), the real output will be higher or significantly lower. Although many companies and industry groups say a 10 kW system will generate about 10,000 kWh per year (equaling the average power usage in a U.S. For example, a 100-watt light bulb left on for 10 hours uses one kWh. Utility bills are measured in kilowatt-hours (kWh) - power usage multiplied by time. However, homeowners are typically buying their first turbine, so they have no basis for comparison. At least most car buyers have already owned a car, so they have a rough idea how to translate horsepower figures. The number of "horses under the hood" doesn't indicate the fuel efficiency or top speed without vehicle weight, driving conditions, and other stats. It shows which engine or turbine is bigger, but isn't a direct measure of the machine's full energy output. The rating is somewhat like a car's horsepower figure. Most turbines have a power rating in kilowatts (kW). Homeowners should avoid general ratings and carefully study the potential power-generating capacity of a wind turbine on a specific site. Thinking of going off-grid and generating your own residential wind power? Several factors – both mechanical and natural – will affect the amount of power generated by a home wind turbine.
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