Problem 3: A submersible deep-well pump delivers 745 gal/ h of water through a 1-in Schedule 40 pipe when operating in the system sketched in the figure below. An energy loss of 10.5 lb-ft/lb occurs in the piping system. (a) Calculate the power delivered by the pump to the water. (b) If the pump draws 1 hp, calculate its efficiency. Air Storage 40 psig tank

Problem 3: A submersible deep-well pump delivers 745 gal/ h of water through a 1-in Schedule 40 pipe when operating in the system sketched in the figure below. An energy loss of 10.5 lb-ft/lb occurs in the piping system. (a) Calculate the power delivered by the pump to the water. (b) If the pump draws 1 hp, calculate its efficiency. Air Storage 40 psig tank

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

The below figure shows a pump that transfers a steady stream of 35◦API crude oil from an oiltanker to a refinery storage tank, both free surfaces being open to the atmosphere. Theeffective length—including fittings—of the commercial steel pipe is 6,000 ft. The dischargeat point 4 is 200 ft above the pump exit, which is level with the free surface of oil in thetanker. However, because of an intervening hill, point 3 is at a higher altitude than point 4.Losses between points 1 and 2 may be ignored.The crude oil has the following properties:Density ρ = 53 lbm/ft 3 ; Viscosity μ = 13.2 cP; Vapour Pressure Pv = 4.0 psia Answer the following questions:1. If the combination of pump and motor is 80% efficient, how much electrical power(kW) is needed to drive the pump?2. If, in order to avoid vapour lock, the pressure in the pipeline must always be above thevapor pressure of the crude oil, what is the maximum permissible elevation of point 3relative to point 4?3. If the flow in the pipeline…
Oil of specific gravity 0.750 is pumped from a tank over a hill through a 24′′ pipe with the pressure at the top of the hill maintained at 25.5 psi. The summit is 250 ft above the surface of the oil in the tank, and oil is pumped at the rate of 22.0 cfs. If the lost head from tank to summit is 15.7 ft, what horsepower must the pump supply to the liquid? Indicate the Free Body Diagram
Water recirculates at a volume flow rate of 0.4524 ft3/min from the blade outlet to the impeller, and shaft sealing losses are negligible. A centrifugal pump has a hydraulic efficiency of 95% and a mechanical efficiency of 93%, respectively. Calculate the pump efficiency in percent if the pump delivers water at a flow rate of 12 ft3/min.
The volume flow rate of water that recirculates from the blade outlet to the impeller is estimated to be 0.4524 ft^3/min, and the losses through the shaft sealing is negligible. The hydraulic and mechanical efficiency of a centrifugal pump are 95% and 93%, respectively. If the pump delivers water a flow rate of 12 ft^3/min, calculate the pump efficiency in %.
A centrifugal pump that is used in pumping water to a tank operates at a rate of 1 gpm. The pump is driven directly by an electric motor with an input power of 1.5 hp running at a speed of 1700 rpm. The total head loss of the system is 10 m. If the motor drives the pump at 2200 rpm. What would be the increase in the input power of the pump?
4. The pump station requires to lift the water requirement of the municipality. The total dynamic head requirement is 40 m. If the total head loss is 5 m, determine the power in kW required to reach the required elevation. If the efficiency of the pump is 80% determine the power required in kW. 5. The Water District plans to cross two parallel pipes along both sides of the bridge to augment the 400 mm transmission line. If the diameter of the two pipes are 200 mm and 250 mm, respectively, determine the total head loss in meter and the flow rate in m3/s along the two pipes. Consider that the flow is 25 MLD and the length of both pipes are 150 m.
A pump takes water at 60°F from a large reservoir and delivers it to the bottom of an open elevated tank 25 ft above the reservoir surface through a 3 inch ID pipe. The inlet to the pump is located 10 ft below the water surface, and the water level in the tank is constant at 160 ft above the reservoir surface. The pump delivers 150 gal/min. If the total loss of energy due to friction in the piping system is 35 ft·lbf/lb, Calculate the horsepower required to do the pumping. The pump and its motor have an overall efficiency of 55 %. i. Determine the velocity of the water at point 2 in ft/s. ii. Assuming that the large open reservoir is open to the atmosphere as well, which of the following equations best describes the mechanical energy balance for the system? iii.The Reynolds number for the flow is?
A pump takes water at 60°F from a large reservoir and delivers it to the bottom of an open elevated tank 25 ft above the reservoir surface through a 3 inch ID pipe. The inlet to the pump is located 10 ft below the water surface, and the water level in the tank is constant at 160 ft above the reservoir surface. The pump delivers 150 gal/min. If the total loss of energy due to friction in the piping system is 35 ft·lbf/lb, Calculate the horsepower required to do the pumping. The pump and its motor have an overall efficiency of 55 %. i. What is Delta Z (Z2 - Z1) ? in ft. ii. Determine the theoretical shaft work required in foot-pound force per pound mass.. iii.Determine the actual shaft work needed for this particular mass flow rate in (ft-lbf)/s.
A farmer owns an 8-hp engine. He wants to use it to pump water from a 50-ft deep shallow tube well to irrigate his field. What size of centrifugal pump would you recommend to the farmer? Assume 30% system efficiency.
a pump operating at 1750 rpm delivering 600 gpm against total head of 200 tt. changes in the piping system have increase the total head of 450 tt. At what RPM should the pump be operated to achieve thus new head at the same efficiency?
What are the frictional losses to be considered when calculating power consumption of a pump under operation?
A centrifugal pump having an overall efficiency of 75%, delivers 1850 liters of water per minute to a height of 20 m through a pipe 10 cm diameter and 100 m long. If f=0.012, calculate the hp to drive the pump.