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forencoskels QUESTION 6 [12 MARKS] 1. Calculate the power developed by the rotor of a horizontal...
Question 30 6 points Save Answer (LO4) A wind turbine with a 40-m-diameter rotor is rotating...
Question 30 6 points Save Answer (LO4) A wind turbine with a 40-m-diameter rotor is rotating at 21 rpm under steady winds at an average velocity of 14.7 m/s. The electrical power output from the generator is 350 kW. The efficiency of the gearbox is 93% and generator efficiency is 86%. Take the density of air to be 1.013 kg/m. Answer the following questions; use the white paper to work-out your calculations and then choose the correct answer from the...
QUESTION 5 A wind turbine is operating in a wind of 10 m/s - that has a density of 1.2 kg/m3. The diameter of the w...
QUESTION 5 A wind turbine is operating in a wind of 10 m/s - that has a density of 1.2 kg/m3. The diameter of the windmill is 4 m. The constant pressure_ (atmospheric) streamline passing the turbine blade tip has a diameter of 3 m upstream of the wind turbine and 4.5 downstream. Assume that the velocity distributions are uniform and the air is incompressible. Determine the thrust due to the wind on the wind turbine. (5 marks)
1) When a jet of air 2.54 cm in diameter strikes a series of rotors on...
1) When a jet of air 2.54 cm in diameter strikes a series of rotors on a turbine rotor, the inlet and outlet velocities are as shown. Assuming that the air has a constant density of 1.2 kg/m3, compute the force on the rotor, the power transferred to the rotor, and the velocity of the blade system, or 121.92 m/s 90o 45% 152.40 m/s
Problem 8 A wind turbine with a 60m diameter swept area is operating at an elevation of 600m, spinning at a TSR of 10, with ß-10°, at a Cp of 27.5%, in horizontal winds of 17 m/s, and generating...
Problem 8 A wind turbine with a 60m diameter swept area is operating at an elevation of 600m, spinning at a TSR of 10, with ß-10°, at a Cp of 27.5%, in horizontal winds of 17 m/s, and generating 2 Mw of power. What is the air density?
Problem 8 A wind turbine with a 60m diameter swept area is operating at an elevation of 600m, spinning at a TSR of 10, with ß-10°, at a Cp of 27.5%, in...
Please help ASAP will rate. 3. The wind speed, V, in a wind farm follows a...
Please help ASAP will rate.
3. The wind speed, V, in a wind farm follows a boundary layer distribution of V = 8 15 hodhi (m/s) ---100 -100 where h is the height from ground. The wind turbine efficiency reaches to 90% of the ideal efficiency. If a turbine blade length is 60m, in order to have a power output of 1.5 MW for this turbine, what is the wind velocity and the height that the turbine should be set?...
5. (4x5pts = 20pts) An anemometer mounted 10 m above a surface with crops, hedges, and...
5. (4x5pts = 20pts) An anemometer mounted 10 m above a surface with crops, hedges, and shrubs, shows a wind speed of 5 m/s. Assuming 15°C and 1 atm pressure, determine the following for a wind turbine with hub height 80 m and rotor diameter of 80 m: V top - - 80 m 120 m V bottom - 80 m 5 m/s 40 m 10 m Crops, shrubs, hedges FIGURE P7.2 a. Estimate the wind speed and the specific...
power generated by a windmill in watts, is proportional with a constant of proportionality of 5)...
power generated by a windmill in watts, is proportional with a constant of proportionality of 5) to the density of the area swept out by the windmill rotor blade, and the cube of the velocity of the wind. (a) write the given verbal description as where is the power (W), D is the density of the air (k/m). A is the area swept out by the rotor blade (m2), and is the velocity of the wind (m/s) PED, AV (b)...
Consider a 1 MW, 50 m diameter horizontal axis, fixed wind turbine operating at a wind...
Consider a 1 MW, 50 m diameter horizontal axis, fixed wind turbine operating at a wind speed of 12 m/s. 3 blades mounted on a cast iron hub drive a generator through a gearbox of overall ratio 1:50. The induction generated is connected directly to the 60 Hz network and keeps the high speed shaft at 1500 RPM. Ignoring all other loses, calculate CP, lamda, rotor tip speed, and torque on low and high sides of the shaft.
1. Increasing the diameter of turbine blade 3 times power of turbine will 2. Maximum possible...
1. Increasing the diameter of turbine blade 3 times power of turbine will 2. Maximum possible efficiency of a wind turbine i 3. A taller wind turbine gives higher power because at higher altitude A) Increase 2 times 1B) decrease 4 times C) incrense 8 times D) Increase 9 tinves As A)39% B) 49% C)50% D) 90% Ans A) Density of air is higher B) air velocity of higher C) air pressure is higher D) air temperature is higher Anst...
7.26. The conversion of the kinetic energy of wind to electricity may be an attractive altemative...
7.26. The conversion of the kinetic energy of wind to electricity may be an attractive altemative to the use of fossil fuels. Typically, wind causes the rotor of a turbine to turn, and a generator converts the rotational kinetic energy ofthe rotor into electricity. Power generated by a wind turbine (Ws) can be estimated from the density of the air (p), wind speed (u), and turbine rotor diameter (D) using the following formula лD? 1 W. ти* х п, where...
Question 30 6 points Save Answer (LO4) A wind turbine with a 40-m-diameter rotor is rotating at 21 rpm under steady winds at an average velocity of 14.7 m/s. The electrical power output from the generator is 350 kW. The efficiency of the gearbox is 93% and generator efficiency is 86%. Take the density of air to be 1.013 kg/m. Answer the following questions; use the white paper to work-out your calculations and then choose the correct answer from the...
QUESTION 5 A wind turbine is operating in a wind of 10 m/s - that has a density of 1.2 kg/m3. The diameter of the windmill is 4 m. The constant pressure_ (atmospheric) streamline passing the turbine blade tip has a diameter of 3 m upstream of the wind turbine and 4.5 downstream. Assume that the velocity distributions are uniform and the air is incompressible. Determine the thrust due to the wind on the wind turbine. (5 marks)
1) When a jet of air 2.54 cm in diameter strikes a series of rotors on a turbine rotor, the inlet and outlet velocities are as shown. Assuming that the air has a constant density of 1.2 kg/m3, compute the force on the rotor, the power transferred to the rotor, and the velocity of the blade system, or 121.92 m/s 90o 45% 152.40 m/s
Problem 8 A wind turbine with a 60m diameter swept area is operating at an elevation of 600m, spinning at a TSR of 10, with ß-10°, at a Cp of 27.5%, in horizontal winds of 17 m/s, and generating 2 Mw of power. What is the air density?
Problem 8 A wind turbine with a 60m diameter swept area is operating at an elevation of 600m, spinning at a TSR of 10, with ß-10°, at a Cp of 27.5%, in...
Please help ASAP will rate.
3. The wind speed, V, in a wind farm follows a boundary layer distribution of V = 8 15 hodhi (m/s) ---100 -100 where h is the height from ground. The wind turbine efficiency reaches to 90% of the ideal efficiency. If a turbine blade length is 60m, in order to have a power output of 1.5 MW for this turbine, what is the wind velocity and the height that the turbine should be set?...
5. (4x5pts = 20pts) An anemometer mounted 10 m above a surface with crops, hedges, and shrubs, shows a wind speed of 5 m/s. Assuming 15°C and 1 atm pressure, determine the following for a wind turbine with hub height 80 m and rotor diameter of 80 m: V top - - 80 m 120 m V bottom - 80 m 5 m/s 40 m 10 m Crops, shrubs, hedges FIGURE P7.2 a. Estimate the wind speed and the specific...
power generated by a windmill in watts, is proportional with a constant of proportionality of 5) to the density of the area swept out by the windmill rotor blade, and the cube of the velocity of the wind. (a) write the given verbal description as where is the power (W), D is the density of the air (k/m). A is the area swept out by the rotor blade (m2), and is the velocity of the wind (m/s) PED, AV (b)...
1. Increasing the diameter of turbine blade 3 times power of turbine will 2. Maximum possible efficiency of a wind turbine i 3. A taller wind turbine gives higher power because at higher altitude A) Increase 2 times 1B) decrease 4 times C) incrense 8 times D) Increase 9 tinves As A)39% B) 49% C)50% D) 90% Ans A) Density of air is higher B) air velocity of higher C) air pressure is higher D) air temperature is higher Anst...
7.26. The conversion of the kinetic energy of wind to electricity may be an attractive altemative to the use of fossil fuels. Typically, wind causes the rotor of a turbine to turn, and a generator converts the rotational kinetic energy ofthe rotor into electricity. Power generated by a wind turbine (Ws) can be estimated from the density of the air (p), wind speed (u), and turbine rotor diameter (D) using the following formula лD? 1 W. ти* х п, where...
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