Figure 7.21 shows a pump delivering
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- A centrifugal pump discharging 10 lps against 25 m of head and operating with an efficiency of 60% requires 4.1 kW at 1000 rpm. What is the theoretical discharge if the speed is increased to 1500 rpm assuming the efficiency remains constant? What is the theoretical head and kW at 1500 rpm?.arrow_forwardIn single operations, characterize a single double-acting pump.arrow_forwardExplain Reciprocating pump? List the components of a reciprocating pump and briefly describe each one's role.arrow_forward
- 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?arrow_forwardASAP 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 is the rate of flow of the pump?arrow_forwardA 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.arrow_forward
- A large container filled with water and uncovered for use in fighting fires in an ethylene production plant. Water from this tank is pumped into the nozzle when needed use. This fire suppression system is designed to be able to transmit 1890 L/min of water at a pressure of 15 bar (relative pressure). If we ignore the difference in height between the water level in the tank and pump, there is no change in diameter of pipe and nozzle, pump efficiency is 70%. Ask how much work (hp) is required to the pump to achieve the desired pressure and flow would like?arrow_forwardState the Heads of Pumps *arrow_forwardCompute the water horsepower and electrical power needed for the pump and motor with the following assumptions: a.) Fluid is oil with specific gravity of 0.8 (specific gravity = density of oil/density of water) b.) oil needs to be pumped at a height of 20m, neglect friction loss c.) the volumetric flow rate of the pump = 20 GPM d.) assuming the following efficiences, pump efficiency = 75%, motor efficiency = 90%. NEEDS COMPLETE SOLUTION, AS SOON AS POSSIBLE. THANK YOU.arrow_forward
- A pumping station wet well operates between 540- and 550-ft elevation. The pump curve is deϐined by the following points: 80 ft at zero ϐlow, 78 ft at 200 gpm, 65 ft at 800 gpm, and 50 ft at 1200 gpm. The pump discharge contains an equivalent of 50 ft of 6-in. pipe. The discharge pipe is 120-ft long and terminates at a splitter box, elevation 570. Using C=100, plot the pump curve and the corrected pump curve. Plot the pump discharge curves at each wet well elevation and for C=100 and C=140. What is the pump ϐlow at the low and high wet well elevations for newand old pipe?arrow_forwardA centrifugal pump delivers 3000,000 liters per hour of water to a pressurized thank whose pressure is 280 kPa. The source of water is 5 meters below the pump. The diameter of the suction pipe is 300 mm and the discharge pipe is 250 mm. calculate the KW rating of the driving motor assuming the pump efficiency to be 72%. (answer is 13.16 KW) with drawing.arrow_forwardA pump attendant failed to conduct priming for a centrifugal pump before use. After few hours of operation, what would be the consequence of his action?arrow_forward
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