Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780133494839
Author: Mott
Publisher: PEARSON
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Chapter 7, Problem 7.4PP
A long DN
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The San Francisquito plant no. 1 is supplied by 3 steel-lined penstocks each 80 inches in diameter that carries a combined volumetric flow rate of 712 ft3/s.
Assuming water at 80°F
find
a)Head loss (in feet) due to viscous effect . Include both major and minor losses.
b)Your estimate of the power generation potential in MW.
Convert 50 GPM to ft/s in a 4" Sch 40 pipe
As seen in Figure 3 below, the water from the tank 1 is pumped to the tank 2 with a flow rate of 5,664 liters/s, passing through a pipe with a diameter of 50.8 mm and a length of 121.92 m. Some of the local losses in the system are also shown on the figure. Calculate the effective power of the pump by taking the relative roughness ɛ / d = 0.001
Note: For all questions, pwater = 1000 kg/m³, g=9.81m/s^2 , the kinematic viscosity of water is 1.0219x106 m²/s and the questions can be solved by accepting the values that are not given.
Chapter 7 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 7 - A horizontal pipe carries oil with a specific...Ch. 7 - Water at 40 F is flowing downward through the...Ch. 7 - Find the volume flow rate of water exiting from...Ch. 7 - A long DN 150 Schedule 40 steel pipe discharges...Ch. 7 - Figure 7.14 shows a setup to determine the energy...Ch. 7 - A test setup to determine the energy loss as water...Ch. 7 - The setup shown in Fig. 7.16 is being used to...Ch. 7 - A pump is being used to transfer water from an...Ch. 7 - In Problem 7.815 (Fig. 7.17), if the left-hand...Ch. 7 - A commercially available sump pump is capable of...
Ch. 7 - A submersible deep-well pump delivers 745 gal/h of...Ch. 7 - In a pump test the suction pressure at the pump...Ch. 7 - The pump shown in Fig. 7.19 is delivering...Ch. 7 - The pump in Fig. 7.20 delivers water from the...Ch. 7 - Repeat Problem 7.14, but assume that the level of...Ch. 7 - Figure 7.21 shows a pump delivering 840L/min of...Ch. 7 - Figure 7.22 shows a submersible pump being used to...Ch. 7 - Figure 7.23 shows a small pump in an automatic...Ch. 7 - The water being pumped in the system shown in Fig....Ch. 7 - A manufacturer's rating for a gear pump states...Ch. 7 - The specifications for an automobile fuel pump...Ch. 7 - Figure 7.26 shows the arrangement of a circuit for...Ch. 7 - Calculate the power delivered to the hydraulic...Ch. 7 - Water flows through the turbine shown in Fig....Ch. 7 - Calculate the power delivered by the oil to the...Ch. 7 - What hp must the pump shown in Fig. 7.30 deliver...Ch. 7 - If the pump in Problem 7.26 operates with an...Ch. 7 - The system shown in Fig. 7.31 delivers 600 L/min...Ch. 7 - Kerosene (sg = 0.823 ) flows at 0.060m3/s in the...Ch. 7 - Water at 60 F flows from a large reservoir through...Ch. 7 - Figure 7.34 shows a portion of a fire protection...Ch. 7 - For the conditions of Problem 7.31 and if we...Ch. 7 - In Fig. 7.35 kerosene at 25 F is flowing at 500...Ch. 7 - For the system shown in Fig. 7.35 and analyzed in...Ch. 7 - Compute the power removed from the fluid by the...Ch. 7 - Compute the pressure at point 2 at the pump inlet.Ch. 7 - Compute the pressure at point 3 at the pump...Ch. 7 - Compute the pressure at point 4 at the press...Ch. 7 - Compute the pressure at point 5 at the press...Ch. 7 - Evaluate the suitability of the sizes for the...Ch. 7 - The portable, pressurized fuel can shown in Fig....Ch. 7 - Professor Crocker is building a cabin on a...Ch. 7 - If Professor Crocker's pump, described in Problem...Ch. 7 - The test setup in Fig. 7.39 measures the pressure...Ch. 7 - If the fluid motor in Problem 7.44 has an...Ch. 7 - A village with a need for a simple irrigation...Ch. 7 - As a member of a development team for a new jet...Ch. 7 - A fire truck utilizes its engine to drive a pump...Ch. 7 - A home has a sump pump to handle ground water from...Ch. 7 - In Problem 6.107 an initial calculation was made...Ch. 7 - A creek runs through a certain part of a campus...Ch. 7 - A hot tub is to have 40 outlets that are each 8 mm...Ch. 7 - A large chipper/shredder is to be designed for use...
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- Water at 60°F is pumped from a reservoir to the top of a mountain through a 6-in. Schedule 120 pipe at an average velocity of 12 ft/s. The pipe discharges into the atmosphere at a level 3,000 ft above the level in the reservoir. The pipeline itself is 4,500 ft long. If the overall efficiency of the pump and the motor driving it is 70 percent and the cost of electric energy to the motor is 4 cents per kilowatt hour, what is the hourly energy cost for pumping this water?arrow_forwardCalculate the power required to pump water at 120 kg/s from a supply tank, through an 18 cm diameter galvanised iron pipe to a storage tank located 12m above the supply tank. The length of the pipe is 70 m. All losses other than friction losses are ignored. [Hint: Use Moody Diagram] (For water, ρ = 1000 kg/m3, μ = 1.003 x 10-3 Pa.s)arrow_forwardWater (15 C) is transported from an open reservoir to the atmosphere through a new cast iron pipe (d = 4 in). At the end of the pipe there is a fully open gate valve. Evaluate the maximum flow rate (gal / min) through the pipe.arrow_forward
- The volume flow rate of water is 662,73 liters/min. Calculate the maximum length of the pipe [m], which can be used without cavitation? (NOTE: Take water temperature as 10 °C)arrow_forwardThe flow rate of a hydraulic fluid with a Sg of 1.08 through a 2-in. I.D. orifice is 50 gal/min. If the pressure drop across the orifice is 5 lbf/in.", what is the discharge coefficient?arrow_forwardDetermine the recommended minimum speed (rpm) for a radial flow pump operating at 0.165 m3/s of water against a head of 300 marrow_forward
- In an annular section made of commercial steel pipe with an outer diameter or 13.78 inches inside a commercial steel pipe with an inner diameter of 23.62 inches carries a water flowrate of 600L/sec. The total length of the section is 10m. What is the frictional loss in meters of water at a temperature of 68o F?arrow_forwardA 5 cm diameter pipe takes off abruptly from a large tank and runs 8 m, then expands abruptly to 10 cm diameter and runs 45 m and next discharges directly into the open air with velocity of 1.5 m/sec. Compute the necessary height of water surface above the point discharge (Hint: losses in pipes in series concept).arrow_forwardA lift pump was used to collect water at 60 strokes per minute and 50 liters was collected. The lift pump has a bore of 10 cm and stroke of 15 cm. What is the volumetric efficiency of the lift pump?arrow_forward
- note: indicate free body diagram Water enters a pump through a 250 mm diameter pipe at 35 kPa. It leaves the pump at 140 kPa through 1 150 mm diameter pipe. If the flow rate is 150 L/s. Compute the energy head added by pump in meters. a.8.49 b.20.45 c.15.34 d.13.90arrow_forwardBenzene flows through a 100 mm diameter pipe at a mean velocity of 3 m/s. Find discharge in liter per second.arrow_forwardThe 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…arrow_forward
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