200 kN/m Turbine 3 0.3 m /s'0.4 m
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![200 kN/m
Turbine
0.3 m/s'0.4 m dia.
- 20 kN/m
0.6 m dia.
Fig. 6.96
In Fig 6.96 what is the power
developed by the
turbine assuming efficiency of
80%?
[Ans. 54 kW]
jo 12:24](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5d18110f-e7c2-4419-ad77-be0e909dc58d%2Fa137f075-9429-4b40-9cf6-479eff39eaba%2F6n32hyo_processed.jpeg&w=3840&q=75)
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- Assess the capabilities of a hydroelectric power plant from the following field data: Estimated water flow rate, 40 m3/s River inlet at 1 atm, 10 C Discharge at 1 atm, 10.2 C, 200 m below the intake1) Interpret solar power in the context of environmental impact.2. What is the rigid dichotomy between windmill and diesel-driven pumps?3. For a normal windmill-driven pump at 3 m/s wind speed, the yield at a 10 m Head is typically 0.12 liters/s per m2 of rotor area, value windmills in the context of yield.An electric utility decides to add 50 MW of wind generation to its system. If the individual units are to be rated at 2 MW in a 13-m/s wind at standard conditions and have efficiencies Cp = 0.32, ηm = 0.94, and ηg = 0.96, what is the required swept area of each rotor?
- A Kaplan turbine has the following specifications: H =25 ft., N=400 rpm; power = 650 hp. If the efficiency of the unit is 90%, estimate (a) the flow rate, (b) approxi-mate diameter of the runner, (c) turbine setting to avoid cavitation if the location is at sea level, and (d) turbine setting to avoid cavitation if the location of the unitis at an elevation of 5000 ft. The local temperature is 60°F.Ans: (a) Q=254 cfs; (c) Hs=5.8 ft.; (d) 0.12 ft.In a steam turbine system, suppose the value of ∆mH is constant (meaning, inlet and outlet conditions are maintained). From the energy balance equation, Qnet + Wnet = ∆mH + ∆KE + ∆PE or −0.1209 kW − 70 kW = ??̇? + 8.75 kW − 0.0068kW 1. What will happen to Wnet if there was no increase in kinetic energy, will the magnitude of Wnet increase or decrease? What should be the sign of potential energy so that Wnet will increase in magnitude?2. For a turbine system, what should happen to Qnet, ∆KE, and ∆PE to maximize the work done by the turbine? Which factor is the most significant?Turbines are to be installed where the net head is 400 ft andthe fl ow rate 250,000 gal/min. Discuss the type, number, andsize of turbine that might be selected if the generator selectedis (a) 48-pole, 60-cycle (n = 150 r/min) and (b) 8-pole (n =900 r/min). Why are at least two turbines desirable from aplanning point of view?
- For D400 Wind Power, a) what power output should be able to supply from the 24v D400 at 15.4 m/s? b) If the wind drops to 2 m/s, what will be the output power be? c) According to the perfomance graph what is the maximum power you can obtain from the 24v D400? d) There is a possibility of installing the turbine on top of a 20m high mast instead.Assuming that Z = 0.012, what would you except the wind speed to be at that height? Use wind shear formula and assume Vref = 7.5 m/s at a height of Zref =10 mPls show detailed solution Example 2.2A typical industrial-scale wind turbine has a peak efficiency of about 0.44 for a wind speed of 9 m·s−1. That is, it converts about 44% of the kinetic energy of the wind approaching it into usable electrical energy. The total air flow impinging on such a turbine with a rotor diameter of 43 m is about 15,000 kg·s−1 for the given wind speed. a) How much electrical energy is produced when 1 kg of air passes through the turbine?(b) What is the power output of the turbine?(c) If there is no heat transferred to the air, and if its temperature remains unchanged, what is its change in speed upon passing through the turbine?The wind turbine gives the following data: Blade length, l = 39 m, Wind speed, V= 12.4 m/s, Air density, ρ = 1.23 kg/m3 , Power Coefficient, Cp = 0.39, Calculate the power available in the wind.
- A turbine runs at 150 rpm, discharges 5.7 m3/s and develops 1200 bkw under a net head of 25 m. If the same turbine is operated under a new net head of Hn = 40 m. What will be the brake power, in bkw?EX1: Given are the following data for a commercial centrifugal water pump: r1 =10 cm, rz = 17.5 em, B1 =30°, B2 =20°, speed =1440 r/min. Estimate (a) the design point discharge, (b) the water horsepower, and (c) the head if bs = bz = 4.4 cm.(Hint. design point discharge, i.e €:=90°)EX1: Given are the following data for a commercial centrifugal water pump: r1 =10 cm, r2 = 17.5 cm, By =30°, B2 =20°, speed =1440 r/min. Estimate (a) the design point discharge, (b) the water horsepower, and (c) the head if by = b2 = 4.4 cm.(Hint. design point discharge, i.e 11=90°)