A turbine is rated at 600 HP (output) when the flow of water through it is 0.61 m^3/s. Assuming an efficiency of 87%, what is the head acting on the turbine? а. 48.53 m b. 85.97 m с. 26.45 m d. 37.26 m
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- A powerhouse is equipped with impulse turbines of Pelton type. Each turbine delivers a power of 14 MW when working under a head of 900 m and running at 600 rpm. Find the diameter of the jet and the mean diameter of the wheel. Assume that overall efficiency is 89%, velocity coefficient of jet 0.98, and speed ratio 0.46. (Answer: 132 mm, 1.91 m; respectively)5. Water is pumped 14.5 km from a reservoir at elevation 30 m to another reservoir at elevation 70 m. The steel pipeline connecting the reservoirs has a nominal diameter of 1400 mm (the actual inside diameter is 1372 mm) with C = 90. If the flow is 1.18 m3/s, the pumping efficiency is 82%, and electricity costs $0.14/kWh. Assuming that the density of water is 1000 kg/m3, what will be the monthly power bill? Sketch the hydraulic and energy grade lines.Water flows through a 7.5 m diameter penstock on a dam at a flow rate of 113 m3/s. The total head available for the turbine is 18.4 m. The specifiic weight of water is 9810 N/m3. What is the power generated by the turbine?
- The turbine of a hydrostatic plant is driven by a falling head of water from a source 30 m high up through a 600 mm penstock flowing full. a. Evaluate the theoretical velocity of water as it hits the turbing blades in m/sec. b. Evaluate the theoretical discharge of water in m3/s. c. If the turbine is only 70% efficient, estimate the horsepower available from it.In a hydroelectric power plant, the tailwater level fixes at 480 m. The net head is 27m and head loss is 5% of the gross head. What is the water elevation? a) 508.97m b) 456.7m c) 508.42m d)903.9m2. A turbine is to operate under a head of 25 m at 200 r.p.m. and discharge of 9 cumec. If the efficiency of the turbine is 90%, determine the speed and ouput under the head of 20 m.
- The difference of elevation between the top of the water of the two reservoirs is 125m. If the top of the water of reservoir B has an elevation of 25m and in between the two reservoirs there is a pump- turbine with a design flow rate in both directions of 120 cubic meter per minute and a head loss due to friction of 15m and an efficiency of 75% for both pump and turbine, Determine the ff: a. the power output by the turbine to draw water from the upper reservoir to produce power to a city and b. the power required by the pump, to pump water from the lower reservoir to the upper reservoir to restore energy to the upper reservoir.Water is pumped 14.5 km from a reservoir at elevation 30 m to another reservoirat elevation 70 m. The steel pipeline connecting the reservoirs has a nominal diameter of 1400mm (the actual inside diameter is 1372 mm) with C = 90. If the flow is 1.18 m3/s, the pumpingefficiency is 82%, and electricity costs $0.14/kWh. Assuming that the density of water is 1000kg/m3, what will be the monthly power bill? Sketch the hydraulic and energy grade lines.Two reservoirs A and B have elevations of 250 m and 100 m,respectively. The two tanks are connected by a 250-mm diameterpipe, 250-m long, with a turbine placed along its length. If the flow ofwater in the pipe is 140 L/s and C = 120, then:Determine the power output of the turbine in kW if the efficiency ofthe turbine is 85%.
- It is proposed to build a three- stage centrifugal pump to deliver 4000 kg/min of water at a speed of 900 rpm under a total manometric head of 70 m. The vanes are to be radial at inlet and are to be curved backwards at exit at an angle of 45°. Assuming manometric efficiency of 84% and overall efficiency of 75% and considering that vane thickness accounts for 8% of circumferential area. The velocity of flow may be assumed constant at 2.5 m/sec. The h.p. input necessary is ؟Water passes under a sluice gate in a horizontal rectangular channel of width 2.0 m. The depths of flow on either side of the sluice gate are 1.8 m and 0.3 m. Assuming no energy loss at the gate, calculate the force on the gateA saltwater enters into a hydraulic reaction turbine w/ a velocity of 12ft/s & leaves it 3ft lower with a velocity of 4ft/s. If 100,000lbs of water flow thru the turbine each sec, determine its power output in Hp (Assume the turbine is at 80% efficient).