Hi,
For 2nd slide I mean the equation of avalible power in wind, which is:
P=1/2QU^2_infinite (Q: mass flow rate, U_infinite: velocity of free-streaming wind)
And
Q is defined as: p x U_infinite x A_d. (p: density of air, A_d: Area of disc)
I cannot understand the reason of taking the area...
For the avaliable power to be harvested in free-streaming wind:
P=1/2QU^2_infinite (Q: mass flow rate, U_infinite: velocity of free-streaming wind)
And
Q is defined as: p x U_infinite x A_d. (p: density of air, A_d: Area of disc)
I cannot understand the reason of taking the area of disc, A_d...