Wind energy Flashcards
1
Q
Massa per tijd (differentiaalvergelijking) in U0, u1 en u2
A
pA0u0 en dit is hetzelfde voor u1 en u2
2
Q
Power en thrust
A
F = dp/dt
T = (po-p2)/dt
= (dmu0 - dmu2)/dt
3
Q
Power in the wind
A
0.5Ap*u^3
4
Q
Cp
A
Power extracted / power in the wind
5
Q
Cp formula
A
(2pA1u1^2(u0-u1)) / (0.5pA1*u0^3)
6
Q
Cp formula vereenvoudigd
A
4*(u1^2 / u0^2) * ((u0/u1) - (u1/u0))
7
Q
Betz limit
A
u0:u1:u2 optimaal 3:2:1
8
Q
betz limit formule
A
8/27 * pA1u0^3
9
Q
Wind turbine optimal design
A
tan(phi) = u1/v = 2R/3r*lamda
10
Q
Lift in relation to windspeed
A
rechte hoek
11
Q
drag in relation to windspee
A
paralel
