Water is being pumped from a large lake to a reservoir 25 m above at a rate of 25 L/s by a 16-kW (shaft) pump. If the irreversible head loss of the piping system is 5 m, determine the mechanical efficiency of the pump.
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Q: Water is being pumped from a large lake to a reservoir 25 m above at a rate of 25 L/s by a 10-kW…
A: given pgQHflow rate Q= 25 L/s power of shaft = 10kW required head H= 25+headloss H = 25+5 =30m
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- A manufacturing facility consumes 40 m^3/h of water taken from a nearby river located 15 m below the factory tank.Calculate the daily pumping cost if water is conveyed through a 3in, 240 m-long pipe, including friction losses. The cost of electrical energy is 0.831 pesos/kilowatt-hour and the pump operates with 80% efficiency.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.Compute the minimum water horsepower of a pump needed to pump-out water at a rate of 300 gpm with a total head of 6 m. The pump efficiency is about 60%.
- 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.Find the work required to pump all of the water from a rectangular tank with an 8mx5m base and a height of 7m through a spout 1m high on the top of the tank. Assume water has a density of 1000kg per cubic meter and g=9.8 meters per secondWater is pumped at a flow rate of 15 m3/s from the lower reservoir through a pipe with a diameter of 1.50 m. How much power does the water need to be powered to produce this much flow?
- If you have 10 pumps of 30 HP each + 5 standby, responsible for elevating water from a ground tank to the top of a building through a pipe of 0.2 meters diameter, 0.1 friction factor and 250 meters length with a velocity of 1.2 m/s. Calculate the height of the building.A circular channel of 1.2 m diameter is flowing half full. If the discharge in the channel is measured as 0.85 m3/s, calculate the Froude number of the flow and the specific energy.A centrifugal water pump is tested under its design flow rate Q=250 m/hr. The static pressure at the suction and discharge end of the pump are measured 1.2 bar and 8.5 bar respectively. The suction pipe is 10"- 40 and the discharge pipe is 8"- 40. The energy consumed by the pump during a test period of 30 minutes is 48.5kwhr. The geodetic head difference between suction and discharge end are 0.25m Detemine the useful head of the pump, the overall efficiency and the energy cost for pumping 10,000 m3 of water under the test operating condition. Assume nmotor-95%, Density of medium=998 kg/m-
- a cylindrical tank stands vertically on the top of the platform. an orifice is placed at the vertical side of the tank and located 3.2m above the ground. if the head of the water is 3.2 m above the center of the orifice, how long will the jet reach the ground?22. A 350 mm pipeline 3000 m long runs on a constant grade between two reservoir of surface elevation 134 m and 129 m respectively. The flow rate through the lines is inadequate and a pump is installed to increase the capacity to 0.26 m3/s. Assuming f = 0.017 compute for the energy produce by the pump?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 ؟