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Hmmm - correction to mt ... Re: Irma's Projected Path 

By: monkeytrots in POPE IV | Recommend this post (1)
Wed, 06 Sep 17 2:14 AM | 79 view(s)
Boardmark this board | POPES NEW and Improved Real Board 		Msg. 33160 of 47202
(This msg. is a reply to 33157 by monkeytrots)
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Getting into the intricacies of Power verses Energy ...

DE - quite correct - the POWER does increase more than the square of the velocity ...Power goes up by the CUBE of the speed - (which I believe to be fully in line with your 'more molecules per second' coupled with the Energy going up with the square.)

Formula for Calculating the Wind Power Produced
Wind Power Generation

The formula used to calculate the wind power produced by a wind turbine or windmill is the following:

P = c x d x (D^2) x (v^3)

P: Power produced (mechanical) (Watts [W])

c: constant

d: density of wind (kilograms per cubic meter [kg/m^3])

D: turbine blade diameter (meter [m])

v: velocity of wind (meters per second [m/s^2]

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Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good ...

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The above is a reply to the following message:
Re: Irma's Projected Path
By: monkeytrots in POPE IV
Wed, 06 Sep 17 1:39 AM 		Msg. 33157 of 47202

>> Correct me if I'm wrong, but doubling the speed of wind should therefore MORE than quadruples its force. More molecules per second and vastly more energy per molecule.

DE - although I (still) agree with you from a logic point of view - the equations for pressure as a function of velocity say we would be wrong on that one.

It is one of the vagaries that have prevented me from every understanding this apparent discrepancy. Took an engineering course in 'alternate energy' at Texas A&M - and (closely associated to this topic) it was stated time and again that two bladed wind turbines were just as efficient as four bladed. Never understand that, but my brother, who has a lot of aeronautical engineering under his wing, confirmed that was indeed the case, two bladed props on aircraft are just as efficient as four bladed ones. So ...in light of those basis- WTH are there three and four (and more) bladed props on aircraft ??

I like the visual of the ball bearing experiment - haven't ever seen it - but can picture it quite clearly. Thanks. *S*

And yes, Einstein's equation caught my fancy during replying as soon as I wrote the equation out, where c is the speed of light. Now here's a conundrum - we are told that as any mass approaches the speed of light, it's mass actually goes to infinity ...so ... why is the E limited ? *w* and chuckling - guess I'm no Einstein,eh ?

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