![]() The typical lifespan of a small wind turbine is 20 years. They will tell you the costs, output, maintenance fees, savings, and payback of the system. When calculating the feasibility of a small wind turbine, it’s best to get information straight from the supplier. When deciding if a wind turbine is for you, you’ll need to determine if it’s financially viable this will influence how many turbines you can afford to buy. However, if you have minimal wind, you might need two or three to meet the same output. If the wind is abundant on your site, you’ll only need one turbine. Therefore, using local wind data will give you a better understanding of your available wind resource. However, maps at larger scales won’t be 100% accurate to your site. Here you’ll be able to find a wind resources map to find out your available wind resource. However, the turbine will be most efficient around the 14 mph mark. The minimum recommended wind speed is 9 miles per hour. To determine what type of wind turbine you need, you have to know the available wind resource on your site. As mentioned above, a turbine with 20 mph wind will generate 600 watts per square foot. ![]() Therefore, turbines with greater “wingspans” will be able to generate more electricity. When a wind turbine has a larger blade, the area where it can catch the wind is greater. The values are based on these calculations. Please note that all measurements were converted from meters and rounded off. The standard turbine blade sizes are as follows: Blade Size (Ft) Larger turbines are used for houses and can generate up to 100 kW. These turbines range from 20 watts to 500 watts. For example, you can use microturbines to charge batteries or power sailboats. Small wind turbines come in different sizes to meet your energy demand. For example, a 23-foot blade can generate 23 kW of electricity. The size of a turbine’s blades determines how much kinetic energy it can collect from the wind. However, these figures depend entirely on the turbine efficiency and the mentioned factors.Ĭross-section of a large commercial wind turbine. Using these numbers, a 1.5 kW turbine in 14mph wind will save 34% of the home’s utility bill. However, a typical American home uses 877 kWh per month. Residential wind turbines produce anywhere between 400 watts and 10 kilowatts of power. Specifically, it shows the number of hours expected per wind speed class. The speed frequency distribution - this graph shows the different wind speeds expected at varying times of the year. Wind speeds increase further away from the ground allowing the turbine to produce more power. The height of the wind turbine tower - the higher the wind turbine tower, the more efficient the turbine will be. We’ll explain what “per square foot” means in the next section. A 20 mph wind will generate 600 watts per square foot of turbine area. The average wind speed in your area - small wind turbines need 3 – 25 mph to be effective. It displays the performance of the wind turbine. The turbine power curve - shows the relationship between the wind speed and turbine power.
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