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WIND versus WAVES in HK
the average wind speed in HK is force 3-4 on Beaufort scale = 3.4 m/s to 7.9 m/s ==> average = 5 m/s
the average wave height in HK is 2 m .
For a typical wind turbine of 50 meters in diameter (2000 M2) we can generate : P = 1.2 D*2 V*3 0.3 = 45 KW .
for a Motorwave of 300m in length (1500 M2) we can generate P = 70 H*4 0.2 = 224 KW
to match the same power a wind turbine has to be of 100 meters in diameter .(10 000 M2)
a typical wind turbine of 50 m cost approximatively : 700 000 US$
a typical wind turbine of 100 m cost approximatively : 2 500 000 US$
a Motorwave cost : 200 000 US$
the simple explanation is : the air (wind) density is near sea approx 1.2 : 1.2 kg /M3
: the water (wave) density approx 1100 : 1100 kg /M3
the energy of an object can be quantify as :
E = M V or E = 1/2 M V*2 or E = M g H where M is the mass and V is the speed and H is the height .
It is therefore easy to understand that, the heavier M is, the higher E will be .
Just for easy understanding (because it is not exactly correct ) the same wind turbine with a same fluid speed will be 1000 times more powerful in water than on land .