Answer:
≈ 18.62 kw
Explanation:
Given data :
Diversity factor among transformer = 1.3
No of transformers load demand factor diversity factor
Transformer 1 10 kw 0.65 1.5
Transformer 2 12 kw 0.6 3.5
Transformer 3 15 kw 0.7 1.5
calculate the maximum load on the feeder
demand factor = max demand / load
Max demand = demand factor * load
max demands:
Transformer 1 = 0.65 * 10 = 6.5
Transformer 2 = 0.6 * 12 = 7.2
Transformer 3 = 0.7 * 15 = 10.5
Diversity factor = ( summation of max demands ) / maximum load on feeder
1.3 = ( 6.5 +7.2 + 10.5 ) / max load on feeder
hence : max load on feeder = 24.2 / 1.3 = 18.62 kw
Answer:
The power spectral density of Y(t) is Syy(w) = 
Explanation:
Answer:
The radius of a wind turbine is 691.1 ft
The power generation potential (PGP) scales with speed at the rate of 7.73 kW.s/m
Explanation:
Given;
power generation potential (PGP) = 1000 kW
Wind speed = 5 mph = 2.2352 m/s
Density of air = 0.0796 lbm/ft³ = 1.275 kg/m³
Radius of the wind turbine r = ?
Wind energy per unit mass of air, e = E/m = 0.5 v² = (0.5)(2.2352)²
Wind energy per unit mass of air = 2.517 J/kg
PGP = mass flow rate * energy per unit mass
PGP = ρ*A*V*e

r = 210.64 m = 691.1 ft
Thus, the radius of a wind turbine is 691.1 ft
PGP = CVᵃ
For best design of wind turbine Betz limit (c) is taken between (0.35 - 0.45)
Let C = 0.4
PGP = Cvᵃ
take log of both sides
ln(PGP) = a*ln(CV)
a = ln(PGP)/ln(CV)
a = ln(1000)/ln(0.4 *2.2352) = 7.73
The power generation potential (PGP) scales with speed at the rate of 7.73 kW.s/m
1. Downside
2. Wishbone
3. Unwise
4. Swindle
5. Wanders
6. Snowed
7. Answer