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    Wind Turbine Comparison Calculator                        
    Original Simple Wind Turbine Comparison Calculator  
    Wind Turbine Comparison (Wind Generator) should be made easy.
    When your wind turbine choices do not list their Power Output at equal Wind Speeds, try this calculator out to get a direct comparison.         		 
    Evaluate your location using a precision anemometer to obtain high quality wind speed data for your wind turbine  
    • Investment in a wind turbine can be substantial, thus it is essential to have a clear picture of your choices...a direct comparison between wind turbines helps.
    • Evaluate your location using a precision anemometer to obtain high quality wind speed data for your wind turbine.
    • Compare efficiency and power output based on manufacturer claimed data for different wind turbines.
    • Compare manufacturer data to maximum theoretical values.
    • Include effects of weather conditions, temperature, height above sea level, and humidity in your results.
    • This calculator computes the Weibull wind speed distribution for your location based on average wind speed data and Weibull shape parameter which can be accurately obtained with one of the following wind speed data logger kits.
    		  
    Wind Speed Data Logger Kit with automatic Weibull parameter calculation (Barani Design) -Anemometer Data Logger Links - Wind Speed Data Logger Kit with automatic Weibull parameter calculation (WIND101.net)  
    YOUR WIND SPEED  
    wind-sock Your AVERAGE Wind Speed
    m/s ft/s kph mph knots
    Your Wind Speed Distribution Shape β -Determines how often each wind speed occurs relative to all other wind speed during a period of time.
    (unitless)
    		-If in doubt use 2 or obtain a wind data logger that can calculate it for you. 1+1/β =
    Your Minimum Wind Speed δ -Minimum wind speed should be set to zero unless you are in a location of strong trade winds and zero wind speed may never occur.
    m/s
    Calculated - Weibull Scale Parameter Θ -Wind speed distribution Weibull Scale Parameter calculated from distribution average and shape.
    m/s
    		Gamma Function Γ = 4.41 -9.61 11.61 -8.07 3.34 -0.76 0.07
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    Wind Turbine 1 Data Wind Turbine 2 Data for comparison  
    Turbine 1, Quoted (Claimed) Power Output & Wind Speed Turbine 2, Quoted (Claimed) Power Output & Wind Speed  
    Quoted Power Output = Watts kW Quoted Power Output = Watts kW
    Wind Speed
    (at quoted Power Output) =     		m/s mph Wind Speed
    (at quoted Power Output) =     		m/s mph  
    Cut In Wind Speed = m/s mph Cut In Wind Speed = m/s mph
    Cut Out Wind Speed = m/s mph Cut Out Wind Speed = m/s mph
    Calculated Turbine Efficiency = Max theoretical efficiency can be 59.3% Calculated Turbine Efficiency = Max theoretical efficiency can be 59.3%  
    Turbine 1, type & size Data Turbine 2, type & size Data  
    Wind Turbine Type =
    		Wind Turbine Type =
    Diameter = meters ft Diameter = meters ft
    Height = meters ft Height = meters ft
    Turbine Swept Area = meters2 ft2 Turbine Swept Area = meters2 ft2
    Effective Swept Area = meters2 ft2 Effective Swept Area = meters2 ft2
    Small Wind Max Estimate
    based on Literature =     		Propeller (HAWT) = 45% max
    Wind Mill (VAWT) = 40% max     		Small Wind Max Estimate
    based on Literature =     		Propeller (HAWT) = 45% max
    Wind Mill (VAWT) = 40% max     		 
    YOUR CLIMATIC / WEATHER CONDITIONS  
    weather-sun-snow-icon.png  Height above Sea level -Elevation or height above sea level has a significant impact on air density and thus wind turbine power output.      
    meters ft
    Standard Atmosphere Barometric Pressure -Air density adjusted for height above sea level & temperature. Referenced from the Standard Atmosphere.  
    Pa hPa inHg
    Local Temperature -Temperature has a significant impact on air density and thus wind turbine power output.    
    °C °F
    Local Humidity -Relative humidity has an effect on air density at temperatures above 30°C.    
    %
    Calculated - Air Density based on International Standard Atmosphere -Air density adjusted for height above sea level & temperature. Referenced from the Standard Atmosphere.  
    kg/m3 lb/ft3    
      Cumulative Power Output at each Wind Speed
    		  
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    Wind Speed (meters per second) (m/s) Wind Speed (meters per second) (m/s)
    Individual Wind Speeds Probability of Occurrence of a Particular Wind Speed Turbine 1
    Inst. Power (Max Theoretical based on geometry)     		Turbine 2
    Inst. Power (Max Theoretical based on geometry)     		Turbine 1 Yearly Power Output (Max Theoretical based on geometry) Turbine 2 Yearly Power Output (Max Theoretical based on geometry) Turbine 1
    Inst. Power (based on CLAIMED data)     		Turbine 2
    Inst. Power (based on CLAIMED data)     		Turbine 1 Yearly Power Output (based on CLAIMED data) Turbine 2 Yearly Power Output (based on CLAIMED data) Turbine 1 Power Output Turbine 2 Power Output   Frequency of Occurrence of a Particular Wind Speed Frequency of Occurrence of a Particular Wind Speed Turbine 1 Limited Wind Speeds Turbine 2 Limited Wind Speeds  
    SUM =
    AVERAGE =
    RESOURCES to assist in Wind turbine comparison and sizing:
    Wind Power 101 (Basic Concepts Tutorial): http://guidedtour.windpower.org/en/tour/wres/weibull/index.htm
    Affordable & accurate Wind Speed Data Logger Kit with automatic Weibull calculation: http://www.Wind101.net/
    NOAA National Climatic Data Center - Average wind speed for cities: http://lwf.ncdc.noaa.gov/oa/climate/online/ccd/avgwind.html
    Wind Powering America US Department of Energy - National average wind speed maps: http://www.windpoweringamerica.gov/wind_maps.asp
    World Wind Speed Maps: http://www.windatlas.dk/




    Elliptic Anemometer & Data Logger: http://www.BaraniDesign.com/products.html      
    Use this wind turbine comparison calculator to compare their performance. For equivalent wind turbines, the one with a wider blade width will more likely be the better overall performer. Click here to learn why? Anemometer Accuracy & Wind Turbine Sizing      

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    www.baranidesign.com         		 
     

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