A pump is to deliver 80 GPM of water at a density of 61.38 lb/ft 3 with adischarge pressure of 150 psig. Suction pressure indicates a 2" Hg vacuum.The diameter of the suction and discharge are 5 in and 4 in, respectively.The pump had an efficiency of 70% while the motor efficiency is 80%.1. Determine the water horsepower of the pump2. Determine the brake horsepower of the pump3. Determine the power input to drive the motor4. Determine the combined motor-pump efficiency

Given, Q=80GPMQ=80×0.13368160Q=0.1782ft3/sDensity, ρ=61.38lb/ft3Suction pressure, Ps=2" Hg…

Answered: A pump is to deliver 80 GPM of water at…

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

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Two electric motors are being considered to drive a centrifugal pump. Each motor is capable of delivering 90 horsepower (output) to the pumping operation. It is expected that the motors will be in use 2,000 hours per year and the MARR = 5% per year. (1 hp = 0.746 kW) a. If electricity costs $X per kilowatt-hour, calculate the annual cost of electrical power for each motor b. What cost of electricity ($/kWh) makes the two pumps breakeven (i.e. have the same equivalent annual cost)? Assume repeatability and MVs = $0. c. Choose the graph to illustrate your answer to Part (b). d. Which motor should be selected? Click the icon to view the datatable for the additional information about two alternatives. Click the icon to view the interest and annuity table for discrete compounding when the MARR is 5% per year. a. The annual cost of electrical power for Motor A is $( XX). (Round to two decimal places.)
4. An electric motor is used to drive the shaft of a small water pump. During a performance test, the torque on the motor shaft is found to be 8.23Nm when the motor is drawing 716 W of electrical power. What is the rpm of the pump shaft if it has an efficiency of 76%?
A fuel pump is delivering 18 gallons per minute of oil with a specific gravity of 0.80, the total head is 75 m. If the power input to the pump is 1.1 hp, what is the efficiency of the pump?
A small centrifugal pump is used to deliver 0.005 m/s of water to level 2 as shown in Fig. 2. Neglecting the losses, determine the required power input to the pump if its efficiency is equal to 70%. Level 2 30 m Pump Figure 2: Schematic diagram of task 2.
A centrifugal pump running at 750r.p.m. discharges water at 0. Im3/s against a head of 10 m at its best efficiency. A second pump of the same homologous series, when working at 500r.p.m., is to deliver water at 0.05m3/s at its best efficiency. What will be the design head of the second pump and what is the scale ratio between the first and the second?
A boiler feed pump receives 60 liters/sec of water with specific volume of 0.00112 m3/kg at a head of 750 m. What is the power output of driving motor if pump efficiency is 65%?
An engine developing 40 brake HP must be cooled by a radiator through which water is pumped from the engine. Calculate the required rate of flow in gpm if the heat transferred from the engine to cooling water = 40 HP, water temperature in radiator top water is 200 0F and at bottom water is 190 0F. One gal of water weighs 8.34 lb.
A pump has a displacement volume of 122 cm3. It delivers 0.0027 m3/s of oil at 1720 rpm and 85 bars. If the prime mover input torque is 175 N∙m What is the overall efficiency of the pump? What is the theoretical torque required to operate the pump?
An industrial fan is to be designed to deliver 20,000 cubic foot per minute of air through a 3ft x 4ft outlet. The static suction pressure is 3 inches of water. Calculate the total air horsepower. Make necessary assumptions on the air temperature and barometric pressure.
What type of impeller should be selected for pumping water (60°F) at 1200 rpm for a pump head of 750 ft and discharge of 15 cfs? O Mixed-flow impeller O Laminar-flow impeller O Radial-flow impeller O Axial-flow impeller
Home work/1: A fan with 24-in-diameter blades moves 2000 cfm (cubic feet per minute) of air at 70°F at sea level. Determine (a) the force required to hold the fan and (b) the minimum power input required for the fan. Choose a control volume sufficiently large to contain the fan, with the inlet sufficiently far upstream so that the gage pressure at the inlet is nearly zero. Assume air approaches the fan through a large area with negligible velocity and air exits the fan with a uniform velocity at atmospheric pressure through an imaginary cylinder whose diameter is the fan blade diameter?
1.1. The pump whose performance curves are shown in Figure P1.1 is operated at 1750 rpm and is connected to a 2-in. i.d. galvanized iron pipe 175 ft long. What will be the flow rate and power input? 100 90 Head curve 80 70 60 50 40 -Efficiency 30 20 10 20 40 60 80 100 120 140 160 180 Flow rate (gpm) FIGURE P1.1 Performance curves for a pump with a 9-in. impeller and speed 1750 rpm. 1.7. If the pump and pipe arrangement of Problem 1.1 now includes an elevation increase of 30 ft, what flow will result? Head rise (ft); efficiency ()

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