7-56. The 90% efficient pump in Figure 7.43 delivers water from a supply tank to a storage tank through a 130-ft-long, 12-in.-diameter commercial steel pipe. If the water temperature is 60°F and the flow rate is 3000 gpm, find the (a) pressure increase across the pump (b) mechanical power that an electric motor must deliver to the pump Z Water Pump Vent Vent 7 Water Figure 7.43 System for Exercises 7-56, 7-57, and 7-58. 120 f

7-56. The 90% efficient pump in Figure 7.43 delivers water from a supply tank to a storage tank through a 130-ft-long, 12-in.-diameter commercial steel pipe. If the water temperature is 60°F and the flow rate is 3000 gpm, find the (a) pressure increase across the pump (b) mechanical power that an electric motor must deliver to the pump Z Water Pump Vent Vent 7 Water Figure 7.43 System for Exercises 7-56, 7-57, and 7-58. 120 f

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

As seen in the figure, the vacuum pump provides air flow in an insulated pipe with a cross section of 46,2 mm2. The air moves along a straight line in a room with a pressure of 100,62 kPa and a temperature of 26,2 oC. If the pressure in section 1 is 98,62 kPa and the temperature in section 2 is 16,2 oC; This is Fanno flow. i) Calculate mass flow rate, ii) Calculate at section 1, flow velocity U1, density, Mach number Ma1, Re, f values iii) Calculate at section 2, find the stopping pressure and temperature, Mach number Ma2, U2 velocity, density, mass flow rate iv) Calculate friction coefficient and force on the channel walls between section 1 and 2. Solve the problem by making the necessary assumptions. v) Calculate L1-2 pipe length Cf=0.079Re-0.25 and f=4Cf expressions can also be used. Solve the problem by making the necessary assumptions and drawing the schematic figure. (a=6 and b=2 on the figure)
1. The figure shows a pump that draws 840 L/min of crude oil (s= 0.85) in an underground storage drum to the first stage of a processing system; a) If the total energy loss in the system is 4.2 N m/N of oil flow, determine the power transmitted by the pump to the fluid. b) If the energy loss in the steel suction line is 1.4 N m/N of oil flow, determine the pressure at the pump inlet
QUESTION 3 A submersible deep-well pump delivers 250L/min of water through a 1-in Schedule 40 pipe when operating in the system sketched in Fig. 3. An energy loss of 2.3 m 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. A 27 kba 12 m
The system in Fig 2 pumps water from a lower reservoir to a higher reservoir. The pipe diameter is 0.235 m and the pipe lengths are L1= 5 m, L2= 4.5 m, L3= 1.5 m, and L4= 0.6 m. The impeller of the centrifugal pump has a diameter of 0.55 m and operates at 850 rpm. The uniform blade height is 51 mm. The water enters the pump parallel to the pump shaft with a flow rate of 0.16 m3/s. Take viscosity as 0.00112 N s/m2. Fig Q2: Piping system to pump water between two tanks. Work to 4 significant digits. Enter all values using base units or their combinations, i.e. m, m/s, Pa, N. Do not use multiples as e.g. mm, kPa. You can use values with exponents, such as 0.12e3. a) What would be the shaft power required to turn the impeller if the exit blade angle is 31 degrees. b)
Water at 5°C is to be pumped from the river to the bottom of a water tower. The pump is 5 m above the river (dimension "a" on the diagram below) and is supplied by a 6.00 inch schedule 40 pipe. The tank is 19.5 m above the pump (dimension "b" on the diagram below) and is supplied by a 4 inch schedule 40 pipe. The water level in the tank is 4.3 m above the inlet (dimension "c" on the diagram below). The pump delivers 0.021 m/s. Losses are estimated to be 1.2 m between the river and the pump, and 4.2 m between the pump and the tank. Discharge line Suction line Pump River a) Calculate the losses in the suction line in kPa, based on the given head loss in m. kPa b) Calculate velocity in the suction line in m/s. m/s c) What is the pressure at the inlet to the pump in kPa? kPa
8. A pumped fluid distribution system is being designed to deliver 400 gal/min of water to a cooling system in a power generation plant. Use the figure below to make an initial selection of Schedule 40 pipe sizes for the suction and discharge lines for the system. Also, solve for the actual average velocity of flow for each pipe. DN (mm) NPS (in) 250 200- 150 - 6 125- Suction lines 100 - 4 3. 65 2 50E 2 Discharge lines 40 - 32 - 25 E 15 15 20 30 40 60 200 400 600 S00 2000 4000 6000 S00 80 100 10 Volume Flow Rate, Qallmin) 8 10 15 20 25 30 40 +++++ +++ 60 80 100 150 200 300 400 500600 800 1000 1200 2000 +++++ +++++ Volame Flow Rate, Q (mVh)
For the hydraulic system of Figure 8, the following data are given: The pump is adding2.984kW to the fluid.(a) Pump flow is 0.00158 m3(b) The pipe inside diameter is 0.0254m.(c) The specific gravity of the oil is 0.9.(d) The oil tank is vented to the atmosphere.(e) The head loss HL between station 1 and 2 is 12.19m.(f) The elevation difference between stations 1 and 2 is 6.096m.Find the pressure available at the inlet to the hydraulic motor(station 2).
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 ()
3. A pump steadily circulates oil used for lubricating heavy machine tools. The volume flow rate and temperature of the oil are 300 gal/min and 104°F, respectively. At 104°F, the kinematic viscosity and the specific gravity of the oil are 2.15 x 10-3 ft² /s and 0.89, respectively. The pipe lengths are 25 ft for the 4-in diameter pipe and 75 ft for the 3-in diameter one. The Schedule-40 steel pipe has an average roughness element size of 0.0018 in. If all minor losses can be ignored, evaluate how much power (in a unit of horsepower) the pump delivers to the oil. 6 ft 22 ft Flow 15 ft Discharge line 3-in Schedule 40 Suction line 4-in Schedule 40 steel pipe steel pipe Pump
For the siphon shown in figure (2), calculate (a) The mass flow rate of water from the tank and (b) The pressure at point C, Use the last two digits of your ID for the height L_ in cm 75 Ignore losses 1.2 m B D A Pipe 40-mm inside diameter 1.8 m Flow 25-mm diameter F L cm
01: A- A large hydropower station has a head of 50 m. The rated power of plant installed is 200 MW. Find: 1- The yearly average flow of water in the penstock to make the yearly capacity factor of this plant is CF% where CF value is the last two digits (from right) of your registration number (i.e. for the student that has a registration number 202112396, CF =96). The efficiencies of the penstock, hydro turbine and the electrical generator are 97%, 92%, 93% respectively. 2- What is the amount of water required to be yearly stored to achieve this generation. 3- Suggest a way to increase this capacity factor. Verify your answer.
pump is open to The figure below shows a liquid-level system in which two tanks have cross-sectional areas, A₁ and A2, respec- tively. A pump is connected to tank 1 through a valve of linear resistance R₁. The inlet to the atmosphere, and the pressure of the fluid increases by Ap when crossing the pump. The liquid flows from tank 1 to tank 2 through a valve of linear resistance R₂ and leaves tank 2 through a valve of linear resistance R3, exiting at at- mospheric pressure. Assume the density p of the liquid is constant and note that both tanks are open to atmosphere as shown. Pa Ap Your Tasks: R₁ Pa ÍRN A₁ R₂ Ple Pa A₂ R3 → 9 A. Derive a differential equation model for the system behavior in terms of the liquid heights h₁ and h₂. B. Put the differential equations into second-order matrix form.