Formula for wind power
[DOC File]California State University, Northridge
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The table of cumulative wind power fractions, shown below, is used to determine the fraction of the total power in the wind that is between two wind speeds V1 and V2. To use this table you first compute V1/c and V2/c and find the table entries for these values of V/c at the k value for your wind speed distribution.
Kinetic and Potential Energy Worksheet Name
IV. Determine whether the objects in the following problems have kinetic or potential energy. Then choose the correct formula to use and solve the problem. (Be sure to show your work!) 21. You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has _____ energy. Calculate it. 22.
[DOC File]ERCOT Generating Reserve Margin Calculation
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The formula for the calculation of the ERCOT Reserve Margin for any calendar year is: Reserve MarginYEAR = (Resources AvailableYEAR – Load ForecastYEAR) (Load ForecastYEAR) ... + 10% of the capacity of wind turbines installed in ERCOT for the summer peak load season of the YEAR,
[DOC File]The Tradeoffs between Engine Power and Torque
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The Tradeoffs between Power and Torque in Engines and Motors ... to its "red line" which might be anywhere from 4000 rpm for an older engine to 12000 rpm for a Formula One engine. The power and torque will vary through this range. ... If it slows down by a small amount (due to the vehicle encountering an incline, head-wind, etc.) engine torque ...
[DOC File]ECE 481- Professional Aspects of Electrical and Computer ...
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Formula for using Wind Power: The power of the wind passing perpendicularly through a circular area is: [ P = 1/2 v3 r2 ] Where ‘P’ = the power of the wind measured in W (Watt). ‘’ = (rho) = the density of dry air = 1.225 measured in kg/m 3 (kilogram’s per cubic meter, at …
[DOC File]General expression for thrust:
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16 Now, as for the turbojet there is still the choice of compression ratio. Generally, we want to choose it for maximum power, which in this case for given turbine inlet temperature, t, and bypass ratio, , means maximum thrust. To maximize the thrust, T, we choose c to maximize f, …
[DOC File]Wind Data Analysis HW
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Using the Jim Bryant data provided in classdat folder and working with excel, NC Wind map & WindCad answer the following questions about the data and produce a report describing the wind resources distribution, average velocity at 20 & 36 meters, average temperature, average air density, power density at 20 & 36 meters, and AEO of a bergey excel grid tied wind turbine on a 36 meter tower using ...
[DOCX File]“INTRODUCTION TO ENERGY” WORKSHEET
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A rock is at the top of a 20 meter tall hill. The rock has a mass of 10 kg. How much potential energy does it have?
[DOC File]California State University, Northridge
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Assume that all turbines have a nominal power coefficient (electricity out divided by wind power in) of 0.45. Turbine Power (kW) Rotor diameter (m) Cut-in wind speed (m/s) Cut-out wind speed (m/s) GE 1.5SLE 1500 77 3.5 25 GE 1.5XLE 1500 82.5 3.5 20 GE 2.5XL 2500 100 3.0 25 Vestas V82-1.65 MW 1650 82 3.5 20 Vestas V80-2 MW 2000 68 4.0 25
[DOCX File]Renewable Sources of Electricity for Penn State University ...
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Wind speed can be defined in terms of the start-up speed, cut-in speed, the rated speed, and the cut-out speed. As its name suggests, the start-up speed is the speed that the rotor and blade begins to rotate, while the cut –in speed is the minimum speed needed for a wind turbine to generate “usable” power, and this ranges from 7-10 mph.
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