if V were volume, then P would be density, which was my original assumption(density*volume=mass), and would result in the same thing i posted.hence my question where the factor 0.5 went.
if P is a pressure, that leaves (m*s^2) missing, for the whole expression to result in an energy, since Pressure is [N/m^2]
im only an engineer, but i found it hard to imagine that by defining an energy by some other equation, you could get more energy output than the kinetic energy the wind has, which is by definition what i posted in #5, and by the law of energie conservation or whatever its called.
i also didnt want to get into a physical debate where someone would notice that i forgot to add friction or other losses into my expression, or that the wind is not "energie-less" after is passes the turbine.
yes, but kinetic energy is directly dependant on density, i don't really see a conflict. more pressure = more volume flow / higher density => more energy (my take on it atleast)
also: do not know shit about tornadoes, or wind, or anything related to the topic ;))
its a quote from back to the future, won't look it up, but i think the joke of it is, that it's not a real scale. ofcourse giga is correct. but the '1.21 something' is from back to the future... what the hell, i'll look it up
ez
For a mature hurricane, the amount of kinetic energy generated is equal to that being dissipated due to friction. The dissipation rate per unit area is air density times the drag coefficient times the windspeed cubed (See Emanuel 1999 for details). One could either integrate a typical wind profile over a range of radii from the hurricane's center to the outer radius encompassing the storm, or assume an average windspeed for the inner core of the hurricane. Doing the latter and using 40 m/s (90 mph) winds on a scale of radius 60 km (40 n.mi.), one gets a wind dissipation rate (wind generation rate) of 1.3 x 1017 Joules/day