Bundle: Sustainable Energy, 2nd + Mindtap Engineering, 1 Term (6 Months) Printed Access Card
2nd Edition
ISBN: 9781337896535
Author: Richard A. Dunlap
Publisher: Cengage Learning
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1.The wind turbine gives the following data: Blade length, 1 = 52 m, Wind speed, V= 12
m/s, Air density,
wind and power available in the rotor.
= 1.23 kg/m³, Power Coefficient, C,= 0.4, Calculate the power in the
2.A Site evaluated for a wind farm is observed to have steady winds at a speed of 8.5m/s.
Determine the wind energy (a) per unit mass, (b) For a mass of 10 kg and (c) For a flow
rate of 1154 kg/s of air.
3.The nominal power of the wind turbine is 3MW at wind speed 11.5m/s, generator
efficiency is 94%, gear box efficiency is 0.75, power coefficient of blades is 0.59. What
would be the diameter of the rotor?
1)
How much power can a HRX Turbine produce daily?
Specifications:
52 meter blades
• Average wind speed at 14-16 knots
Air density is 1.23
Calculate the turbine power with the following data - Blade length, I = 50 m , Wind Speed, v = 10 m/sec , Air density, p = 1.23 kg/m^3 , Power Coefficient, Cp = 0.5. Also, give any three characteristics of wind mills designed to tackle heavy wind load.
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Bundle: Sustainable Energy, 2nd + Mindtap Engineering, 1 Term (6 Months) Printed Access Card
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- You are asked to design a small wind turbine (D-x+1.25 ft, where x is the last two digits of your student ID). Assume the wind speed is 15 mph at T-10°C and p = 0.9 bar. The efficiency of the turbine is n- 25%, meaning that 25% of the kinetic energy in the wind can be extracted. Calculate the power in watts that can be produced by your turbine. Scan the solution of the problem and upload in the vUWS before closing the vUWS or moving to other question. DO NOT EMAIL TO LECTURER. x=08arrow_forwardCalculate the power available in the wind and the rotor power when the blade length for the turbine is given 42 m and the wind speed is 11 m/s. The power coefficient of blades is 0.4, generator efficiency is 85 % while gear box efficiency is 0.8, air density is 1.225 kg/m³. Power available in the wind Power available in the rotorarrow_forwardPlease answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. A 6-MW offshore wind turbine has a capacity factor of 40%. It has a height of 120 m, and 107-m long blades. The angular acceleration is 1.17 rad/s2. Assume that the distance from the center of the turbine to the connection with the blade is negligible, and that the turbine starts from rest. At t = 12 s, calculate the velocity and the acceleration for points (a) at half the length and (b) at the tip of the blade.arrow_forward
- Take the density of air to be 1.25 kg/m³, and disregard fric- 13-42 Commercially available large wind turbines have blade span diameters larger than 100 m and generate over 3 MW of electric power at peak design conditions. Consider a wind turbine with a 60-m blade span subjected to 30-km/h steady winds. If the combined turbine-generator exerted by the wind on the supporting mast of the turbine. power generated by the turbine and (b) the horizontal force efficiency of the wind turbine is 32 percent, determine (a) the tional effects on mast. 30 km/h 60 m FIGURE P13-42arrow_forwardTwo 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]arrow_forwardProblem- Two turbo-generators, each capacity 25,000 kW, have been installed at a hydel power station. The load on the hydel plant varies from 15,000 kW to 40,000 kW. What is the total installed plant capacity and the load factor.arrow_forward
- Problem 1: A solid steel shaft 5 m long is stressed at 80 MPa when twisted through 4º. Using G = 83 GPa, compute the shaft diameter. What power can be transmitted by the shaft at 20 Hz? (in Kilowatts)arrow_forwardProblem T3 If the shaft power is 82kw and the cost of the electricity is $0.10 kwh; estimate the cost of the electricity for one hour. Answer $8.2arrow_forwardHow many kW are delivered by the water flow to the turbine? O 62 kW O 85 kW O 77 kW O 70 kWarrow_forward
- Q.2 Flow Between pipes A car has a frontal projected area of 1.6 m² and travels at 60km/hr. It has a drag coefficient of 0.35 based on frontal area. Calculate the power required in kW to overcome wind resistance by the car. 3 Density of air= 1.2 kg/m³arrow_forwardA solid steel shaft 7 m long is stressed at 88 MPa when twisted through 3º. Using G = 80 GPa, compute the shaft diameter. What power can be transmitted by the shaft at 25 Hz?arrow_forwardFluid Mechanics : Energy and Power: An engineer is considering the development of a small wind turbine (D=1.25m) for home applications. The design wind speed is 15 mph(6.706m/s) at 10oC and 0.9 bar (90kPa). The efficiency of the turbine is 20%, that is 20% of the kinetic energy of the wind can be extracted. Estimate the power in watts that can be produced by the turbine. Hints: 1) In the time interval delta t, the amount of mass that flows through the rotor is: delta m = mdot delta t 2) The kinetic energy in the flow is: (delta m V2/2)arrow_forward
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