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From an analysis of wind speed data (hourly interval average, taken over a one year period), the Weibull parameters are determined to be c = 6 m/s and k = 1.8. What is the average wind speed at this site?
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- Draw an approximate power curve for a 500 kW wind turbine. Assume max power production is reached at 10 m/sec with a cut-in windspeed of 4 m/sec and a cut out of 22 m/sec. Label axis and key points.What is the relation between downwind ground-level concentration and the wind speed?Topographic and bathymetric survey showed that the effective fetch of a reservoir is 1.6 km and that the average depth along the fetch is 2.4 meters. If the upstream face of the dam slopes at 30% smoothly and the wind speed based on data from an adjacent land station is 150 kph, A. What is the wind set up Zs, in meters? B. What is the wave runup Zr, in meters? C. What is the freeboard, in meters?
- What is the effect of wind load on tall buildings? calculate wind pressure by equivalent state method at 30 cm height where the basic wind speed is 40 m/sec. At 30 m height probability factor=1.0; terrain roughness factor=1.12; topography factor=1.0; and importance factor=1.0Saffir-Simpson scale conversion of 1-minute speeds at 10 metres over Category 4 storm with peak wind gusts at 10 metres over open terrain. According to Table safir- simpson scale and corresponding wind speed, the weakest and strongest Category 4 storms had 1-minute speeds at 10 m above open ocean of 130 and 156 mph, respectively. The conversion is based on the surface roughness lengths' anticipated values, which are z_0 for open water and z_0 for open land. In contrast to wind flow over open water, wind flow over shallow water near shorelines is appropriate for relatively large values of z_0. Assuming that Eq. (2.54a,b) produces hurricane winds over open ocean with z_0 = 0.003m and beta(z_0) = 6.5 and c(60s) = 1.29Find the confluence of the streamline measured in degrees if they are 350km apart, the wind speed is 11m/s and wind speed increases by 2m/s for each 500km in the direction of the streamline. The motion is irrotational.
- Assume gw= 10 kN/m3 or 62.5 pcf and Gs=2.7 unless stated otherwise for all the problems in this test.Two sites are being considered for wind power generation. In the first site, the wind blows steadily at 7 m/s for 3000 hours per year, whereas in the second site the wind blows at 10 m/s for 2000 hours per year. Assuming the wind velocity is negligible at other times for simplicity, determine which is a better site for wind power generation. Hint: Note that the mass flow rate of air is proportional to wind velocity.[take the density of air to be ρ = 1.25 kg/m3]Due in 1 hr Please show complete figure and solution thanks!! Question: A rectangular scow 9.0m wide and 15m long has a draft in fresh water 2.45m. Its center of gravity is located 4.57m above its base. If a load 500kn is place on the right hand side of the scow such that the side will just be submerge. Determine a.) Height of the scow.
- How to solve the rainfall intensity in the table?A rectangular flume made of planed timber(n=0.12) has a slope of 1m per km. If the flume will have width of b and depth of y, which of the two flumes will have the greater discharge and which will require less lumber? (Fig. 10.6.2) (Hint: Compute for Q and Rh)Two environmental temperature gradients dT/dz of (a) - 0.008°F/ft and (b) 0.004 °F/ft exist at daytime and nighttime respectively at a given rural locale. Estimate the ratio of wind speed at 400 to 5ft for the two conditions. Note both are at stability category E with rural exponent ρ = 0.35