Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780132558921
Author: Robert L. Mott, Joseph A. Untener
Publisher: PEARSON
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Chapter 10, Problem 10.15PP
Determine the energy loss when
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Determine the friction factor “f “ for a 40 mm ID cast iron pipe handling 400 L/min of water using the Moody Chart
A centrifugal pump takes brine from the bottom of a supply tank and delivers it into the bottom of another tank. The brine level in the discharge tank is 150 ft above that in the supply tank. The line between the tanks is 600 ft of 4-in. Schedule 40 commercial steel pipe. The flow rate is 400 gal/min. In the line are two gate valves, four standard tees, and four ells. The specific gravity of brine is 1.18, the viscosity of brine is 1.2 cP, and the energy cost is $400 per horsepower-year on a basis of 300 days per year. The overall efficiency of pump and motor is 60 %.
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A 400 gpm piping system is composed of the following pipes and fittings.
Using the chart;
Determine the Following:
a. Equivalent length at suction in ft
b. Equivalent length at discharge in ft
c. Total friction loss in the installation, in ft.
Suction side (4.5” Փ)
Length of straight pipe 210 ft
Long sweep elbow 5 pcs
Standard Tee 2 pcs
Globe valve 1 pc
Checked valve 1 pc
Gate valve (fully open) 1 pc
Discharge side (4.0” Փ)
Straight pipe 200 ft
Standard elbow 4 pcs
Standard Tee 3 pcs
Gate valve (fully open) 1 pc
Chapter 10 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 10 - Determine the energy loss due to a sudden...Ch. 10 - Determine the energy loss due to a sudden...Ch. 10 - Determine the energy loss due to a sudden...Ch. 10 - Determine the pressure difference between two...Ch. 10 - Determine the pressure difference for the...Ch. 10 - Determine the energy loss due to a gradual...Ch. 10 - Determine the energy loss for the conditions in...Ch. 10 - Compute the energy loss for gradual enlargements...Ch. 10 - Plot a graph of energy loss versus cone angle for...Ch. 10 - For the data in Problem 10.8, compute the length...
Ch. 10 - Add the energy loss due to friction from Problem...Ch. 10 - Another term for an enlargement is a diffuser. A...Ch. 10 - Compute the resulting pressure after a "real"...Ch. 10 - Compute the resulting pressure after a "real"...Ch. 10 - Determine the energy loss when 0.04m3/s of water...Ch. 10 - Determine the energy loss when 1.50ft3/s of water...Ch. 10 - Determine the energy loss when oil with a specific...Ch. 10 - For the conditions in Problem 10.17, if the...Ch. 10 - True or false: For a sudden contraction with a...Ch. 10 - Determine the energy loss for a sudden contraction...Ch. 10 - Determine the energy loss for a gradual...Ch. 10 - Determine the energy lass for a sudden contraction...Ch. 10 - Determine the energy loss for a gradual...Ch. 10 - For the data in Problem 10.22, compute the energy...Ch. 10 - For each contraction described in Problems 10.22...Ch. 10 - Note in Figs. 10.10 and 10.11 that the minimum...Ch. 10 - If the contraction from a 6-in to a 3-in ductile...Ch. 10 - Compute the energy loss that would occur as 50...Ch. 10 - Determine the energy loss that will occur if water...Ch. 10 - Determine the equivalent length in meters of pipe...Ch. 10 - Repeat Problem 10.30 for a fully open gate valve.Ch. 10 - Calculate the resistance coefficient K for a...Ch. 10 - Calculate the pressure difference across a fully...Ch. 10 - Determine the pressure drop across a 90 C standard...Ch. 10 - Prob. 10.35PPCh. 10 - Repeat Problem 10.34 for a long radius elbow....Ch. 10 - A simple heat exchanger is made by installing a...Ch. 10 - A proposed alternate form for the heat exchanger...Ch. 10 - A piping system for a pump contains a tee, as...Ch. 10 - A piping system for supplying heavy fuel oil at 25...Ch. 10 - A 25 mm ODx2.0 mm wall copper tube supplies hot...Ch. 10 - Specify the radius in mm to the centerline of a 90...Ch. 10 - The inlet and the outlet shown in Fig. 10.36 are...Ch. 10 - Compare the energy losses for the two proposals...Ch. 10 - Determine the energy loss that occurs as 40 L/min...Ch. 10 - Figure 10.38 shows a test setup for determining...Ch. 10 - Compute the energy loss in a 90 bend in a steel...Ch. 10 - Compute the energy loss in a 90 bend in a steel...Ch. 10 - For the data in Problem 10.47, compute the...Ch. 10 - For the data in Problem 10.48, compute the...Ch. 10 - A tube similar to that in Problem 10.47 is being...Ch. 10 - Prob. 10.52PPCh. 10 - Prob. 10.53PPCh. 10 - Prob. 10.54PPCh. 10 - Prob. 10.55PPCh. 10 - Repeat Problem 10.55 for flow rates of 7.5 gal/min...Ch. 10 - Prob. 10.57PPCh. 10 - Prob. 10.58PPCh. 10 - Prob. 10.59PPCh. 10 - Prob. 10.60PPCh. 10 - A 34 plastic ball valve carries 15 gal/min of...Ch. 10 - A 114 plastic butterfly valve carries 60 gal/min...Ch. 10 - A 3 -in plastic butterfly valve carries 300...Ch. 10 - A 10-in plastic butterfly valve carries 5000...Ch. 10 - A 1 12 plastic diaphragm valve carries 60 gal/min...Ch. 10 - Prob. 10.66PPCh. 10 - Prob. 10.67PPCh. 10 - Prob. 10.68PPCh. 10 - Prob. 10.69PPCh. 10 - An 8 -in plastic swing check valve carries 3500...Ch. 10 - Use PIPE-FLO software to determine the pressure...Ch. 10 - Use PIPE-FLO to calculate the head loss and...
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- What is the pressure drop in psi of 60°F water flowing through 65 ft of horizontal 1-inch schedule 40 pipe at 20 gpm?A. 1.2B. 7.1C. 21.0D. 0.008arrow_forward6. A pump draws water from a sump through a vertical 6" pipe. The pump has a horizontal discharge pipe 4" in diameter that is 10.6 ft above the water level in the sump. While pumping 1.25 cfs, gages near the pump at entrance and discharge read -4.6 psi and +25.6 psi, respectively. The discharge gage is 3.0 ft above the suction gage. Compute the horsepower output of the pump and the head lost in the 6" suction pipe.arrow_forwardQ.2) Determine the friction factor, “f” if Ethyl Alcohol at 25 C is flowing at 5.3 m/sec in a standard DN 40 Schedule 80 steel pipe.arrow_forward
- Compute the energy loss as water flows in a standard hydraulic copper tube, 120 mm OD X 3.5 mm wall, at a rate of 1000 L/min over a length of 45 m.arrow_forwardPlease solve using turbulent flow equations.arrow_forwardCalculate the diameter of pipe if, flow rate is 20 I/min and flow velocity is 5 cm/s. Select one: O a. 9.2 cm O b. 92 cm O c.0.92 cm O d. 0.092 cmarrow_forward
- Q.3) Determine the energy loss that will occur as 100 Liters / min of water flows from a small copper tube to a larger tube through a gradual enlargement having an included angle of 30 degrees. The small tube has a 25 mm OD x 1.5 wall thickness; the large tube has an 80 mm OD x 2.8 mm wall thickness.arrow_forwardA pumping system is required that will deliver at least 50,000 GPM against a head of 100 ft is needed for a water ride. The system schematic is given below. Note that the loss coefficient for the pumps accounts for the losses in piping connecting multiple pumps. Use Gould pumps to satisfy this requirement. Submit your loss curve superimposed on the pump curves for the selected pumps in your Excel file. Determine the following. a. The pumps (all the same) to satisfy this requirement. b. The operating point of these pumps. C. NPSHR d. NPSHA K, = 0.28 L, = 50 ft L = 300 ft E = 0.005 ft D = 3.5 ft Q=50,000 GPM u= 2.359x105 slug/ft-s p= 1.938 slug/ft = 1.0 Kext 100 ft K, = 0.6 K, = 0.4 7 ft Pump System K, = 0.28 %3D Kant = 0.5arrow_forwardDetermine the pump head (unit: meter or kPa), using the following parametersarrow_forward
- Q5) Explain the major and minor losses? Then solve for the parallel pipes system shown below, a pump is placed in line 2 so that 0.142 m³/s will flow through each pipe. Pipe material is cast iron and for each elbow. Find the relation between the head loses hi and h12 and estimate the necessary pump head. Water viscosity is u-1x10³ Pa.s. Line 1, L-30 m, D-6 inches Q,-0.142 m/s Pump Line 2, L-30 m, De 3 inches Q-0.142 m/s GOOD LUCKarrow_forward8. 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 - 125 - Suction lines 100 - 90 - 3 65 - 2 50 Discharge lines 40 32E 25 E 15 20 200 400 600 800 1000 2000 4000 6000 8000 10000 10 100 Volume Flow Rate, Q (gal/min) 6 8 10 ++++ 15 20 25 30 40 +++++++++ ++++++++++++ 60 80 100 150 200 300 400 500600 800 1000 1200 2000 Volume Flow Rate, Q (m/h)arrow_forwardQ.1 Water is flowing through a 6” dia corrugated steel pipe. An energy loss of 2ft of head occurs over a length of 100ft . Compute the volume flow rate and velocity at design value of Ch?arrow_forward
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