188 Spring Tower, 10th-12th A Floor,
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wind energy

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HYBRID RENEWABLE ENERGY
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  • Category: wind energy

By Thomas Leonard, DNV GL   In 2017, the Thai Ministry of Energy introdiced a 20-year power purchase agreement(PPA) for electricity generated by hybrid renewable energy plants of between 10 to 50 MW output. The PPA requires generators to deliver 100% of nameplate capacity at peak hours and limits production to 2/3 during non-peak periods….

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แผนที่ลม (Wind map)
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  • Category: wind energy

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Wind Energy, Environment, and Fuels
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  • Category: wind energy

Energy Content of Fuels ** GJ per tonne North Sea Crude Oil  42.7 LPG (Liquefied petroleum gas: Propane, Butane)  46.0 Petrol (Gasoline)  43.8 JP1 (Jet aircraft fuel)  43.5 Diesel / Light Fuel oil  42.7 Heavy Fuel Oil  40.4 Orimulsion  28.0 Natural Gas 39.3 per 1000 Nm 3 Steam Coal  24.5 Other Coal  26.5 Straw  14.5 Wood chips…

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Wind Energy and Electricity
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  • Category: wind energy

Voltage In order to make a current flow through a cable you need to have a voltage difference between the two ends of the cable – just like if you want to make air move through a pipe, you need to have different pressure at the two ends of the pipe. If you have a…

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Wind turbine acoustics
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  • Category: wind energy
dB(A) Sound Levels in decibels and Sound Power in W/m2 Level dB(A) Power W/m 2 Level dB(A) Power W/m 2 Level dB(A) Power W/m 2  0  -121,000*10 55  -73,162*10 83  -41,995*10 10  -111,000*10 56  -73,981*10 84  -42,512*10 20 -101,000*10 57  -75,012*10 85  -43,162*10 30  -91,000*10 58  -76,310*10 86  -43,981*10 31 -91,256*10 59  -77,943*10 87  -45,012*10...
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Proof of Betz’ Law
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  • Category: wind energy

Proof of Betz’ Theorem Let us make the reasonable assumption that the average wind speed through the rotor area is the average of the undisturbed wind speed before the wind turbine, v1 , and the wind speed after the passage through the rotor plane, v2 , i.e. (v1 +v2 )/2. (Betz offers a proof of…

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Energy and power
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  • Category: wind energy
energy and power

Energy Physicists define the word energy as the amount of work a physical system is capable of performing. Energy, according to the definition of physicists, can neither be created nor consumed or destroyed. Energy, however may be converted or transferred to different forms: The kinetic energy of moving air molecules may be converted to rotational…

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Wind Energy Concepts
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  • Category: wind energy
Unit Abbreviationsm = metre = 3.28 ft. s = second h = hour N = Newton W = Watt HP = horsepower J = Joule cal = calorie toe = tonnes of oil equivalent Hz= Hertz (cycles per second) 10-12 = p pico = 1/1000,000,000,000 10-9 = n nano = 1/1000,000,000 10-6 = µ micro = 1/1000,000 10-3 =...
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