FLUID MECHANICS FUNDAMENTALS+APPS
4th Edition
ISBN: 2810022150991
Author: CENGEL
Publisher: MCG
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Chapter 14, Problem 126P
To determine
The term for capacity in turbo machinery industry.
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In the turbomachinery industry, capacity refers to (a) Power (b) Mass flow rate (c) Volume flow rate (d) Net head (e) Energy grade line
Three pumps are connected in series. According to pump performance curves, the free delivery of each pump is as follows: Pump 1: 1600 L/min Pump 2: 2200 L/min Pump 3: 2800 L/min If the flow rate for this pump system is 2500 L/min, which pump(s) should be shut off? (a) Pump 1 (b) Pump 2 (c) Pump 3 (d) Pumps 1 and 2 (e) Pumps 2 and 3
A centrifugal pump operating under steady flow conditions delivers 2285 kg/min of water from an
initial pressure of 82720 Pa to a final pressure of 275840 Pa. The diameter of the inlet pipe to the
pump is 15.20 cm and the diameter of the discharge pipe is 10.5cm. What is the work in kW?
[Pwater=1000 kg/m³]
Chapter 14 Solutions
FLUID MECHANICS FUNDAMENTALS+APPS
Ch. 14 - What is the more common term for an...Ch. 14 - What the primary differences between fans,...Ch. 14 - List at least two common examples of fans, of...Ch. 14 - Discuss the primary difference between a porn...Ch. 14 - Explain why there is an “extra” term in the...Ch. 14 - For a turbine, discuss the difference between...Ch. 14 - Prob. 7CPCh. 14 - Prob. 8PCh. 14 - Prob. 9PCh. 14 - Prob. 10CP
Ch. 14 - There are three main categories of dynamic pumps....Ch. 14 - For each statement about cow cetrifugal the...Ch. 14 - Prob. 13CPCh. 14 - Consider flow through a water pump. For each...Ch. 14 - Write the equation that defines actual (available)...Ch. 14 - Consider a typical centrifugal liquid pump. For...Ch. 14 - Prob. 17CPCh. 14 - Consider steady, incompressible flow through two...Ch. 14 - Prob. 19CPCh. 14 - Prob. 20PCh. 14 - Suppose the pump of Fig. P1 4-19C is situated...Ch. 14 - Prob. 22PCh. 14 - Prob. 23EPCh. 14 - Consider the flow system sketched in Fig. PI 4-24....Ch. 14 - Prob. 25PCh. 14 - Repeat Prob. 14-25, but with a rough pipe-pipe...Ch. 14 - Consider the piping system of Fig. P14—24. with...Ch. 14 - The performance data for a centrifugal water pump...Ch. 14 - For the centrifugal water pump of Prob. 14-29,...Ch. 14 - Suppose the pump of Probs. 14-29 and 14-30 is used...Ch. 14 - Suppose you are looking into purchasing a water...Ch. 14 - The performance data of a water pump follow the...Ch. 14 - For the application at hand, the flow rate of...Ch. 14 - A water pump is used to pump water from one large...Ch. 14 - For the pump and piping system of Prob. 14-35E,...Ch. 14 - A water pump is used to pump water from one large...Ch. 14 - Suppose that the free surface of the inlet...Ch. 14 - Calculate the volume flow rate between the...Ch. 14 - Comparing the results of Probs. 14-39 and 14-43,...Ch. 14 - Prob. 45PCh. 14 - The performance data for a centrifugal water pump...Ch. 14 - Transform each column of the pump performance data...Ch. 14 - 14-51 A local ventilation system (a hood and duct...Ch. 14 - Prob. 52PCh. 14 - Repeat Prob. 14-51, ignoring all minor losses. How...Ch. 14 - Suppose the one- way of Fig. P14-51 malfunctions...Ch. 14 - A local ventilation system (a hood and duct...Ch. 14 - For the duct system and fan of Prob. 14-55E,...Ch. 14 - Repeat Prob. 14-55E, ignoring all minor losses....Ch. 14 - A self-priming centrifugal pump is used to pump...Ch. 14 - Repeat Prob. 14-60. but at a water temperature of...Ch. 14 - Repeat Prob. 14-60, but with the pipe diameter...Ch. 14 - Prob. 63EPCh. 14 - Prob. 64EPCh. 14 - Prob. 66PCh. 14 - Prob. 67PCh. 14 - Prob. 68PCh. 14 - Prob. 69PCh. 14 - Two water pumps are arranged in Series. The...Ch. 14 - The same two water pumps of Prob. 14-70 are...Ch. 14 - Prob. 72CPCh. 14 - Name and briefly describe the differences between...Ch. 14 - Discuss the meaning of reverse swirl in reaction...Ch. 14 - Prob. 75CPCh. 14 - Prob. 76CPCh. 14 - Prob. 77PCh. 14 - Prob. 78PCh. 14 - Prob. 79PCh. 14 - Prob. 80PCh. 14 - Wind ( =1.204kg/m3 ) blows through a HAWT wind...Ch. 14 - Prob. 82PCh. 14 - Prob. 84CPCh. 14 - A Francis radial-flow hydroturbine has the...Ch. 14 - Prob. 87PCh. 14 - Prob. 88PCh. 14 - Prob. 89PCh. 14 - Prob. 90CPCh. 14 - Prob. 91CPCh. 14 - Discuss which dimensionless pump performance...Ch. 14 - Prob. 93CPCh. 14 - Prob. 94PCh. 14 - Prob. 95PCh. 14 - Prob. 96PCh. 14 - Prob. 97PCh. 14 - Prob. 98PCh. 14 - Prob. 99PCh. 14 - Prob. 100EPCh. 14 - Prob. 101PCh. 14 - Calculate the pump specific speed of the pump of...Ch. 14 - Prob. 103PCh. 14 - Prob. 104PCh. 14 - Prob. 105PCh. 14 - Prob. 106PCh. 14 - Prob. 107EPCh. 14 - Prob. 108PCh. 14 - Prob. 109PCh. 14 - Prob. 110PCh. 14 - Prove that the model turbine (Prob. 14-109) and...Ch. 14 - Prob. 112PCh. 14 - Prob. 113PCh. 14 - Prob. 114PCh. 14 - Prob. 115CPCh. 14 - Prob. 116CPCh. 14 - Prob. 117CPCh. 14 - Prob. 118PCh. 14 - For two dynamically similar pumps, manipulate the...Ch. 14 - Prob. 120PCh. 14 - Prob. 121PCh. 14 - Prob. 122PCh. 14 - Calculate and compare the turbine specific speed...Ch. 14 - Prob. 124PCh. 14 - Prob. 125PCh. 14 - Prob. 126PCh. 14 - Prob. 127PCh. 14 - Prob. 128PCh. 14 - Prob. 129PCh. 14 - Prob. 130PCh. 14 - Prob. 131PCh. 14 - Prob. 132PCh. 14 - Prob. 133PCh. 14 - Prob. 134PCh. 14 - Prob. 135PCh. 14 - A two-lobe rotary positive-displacement pump moves...Ch. 14 - Prob. 137PCh. 14 - Prob. 138PCh. 14 - Prob. 139PCh. 14 - Prob. 140PCh. 14 - Which choice is correct for the comparison of the...Ch. 14 - Prob. 142PCh. 14 - In a hydroelectric power plant, water flows...Ch. 14 - Prob. 144PCh. 14 - Prob. 145PCh. 14 - Prob. 146PCh. 14 - Prob. 147PCh. 14 - Prob. 148PCh. 14 - Prob. 149PCh. 14 - Prob. 150PCh. 14 - Prob. 151P
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- = 0.547 59.6 Scanned by CamScanner 938 Power Plant Engineering 16 km. The efficiencies of turbine and generator are 93% each. The density os water is 1025 kg/m³. Calculate (a) the quantity of water flowing through c turbine at maximum output in m/s, (b) the surface area of reservoir in km², (c) the wash behind the embankment at full reservoir capacity, (d) energy produced in TWh per year. (1 TWh (tera-watt hour) = 10° GWh= 10° MWh= 10° kWh=10'² Wh=3.6× 10!5 , %3D %3D %3Darrow_forwardA 37-cm-diameter centrifugal pump, running at 2140 r/min with water at 20°C, produces the following performance data: Q, m'ls | 0.0 | 0.05 | 0.10 | 0.15 | 0.20 | 0.25 | 0.30 105 104 102 100 95 202 | 228 H, m 85 67 P, kW 100 | 115 135 171 249 (a) Determine the best efficiency point. (b) Plot C, versus Co. (c) If we desire to use this same pump family to deliver 7000 gal/min of kerosene at 20°C at an input power of 400 kW, what pump speed (in r/min) and impeller size (in cm) are needed? What head will be developed?arrow_forwardA centrifugal pump has the following characteristics as shown in Table 1. Table 1: Pump characteristics Q(m3 /s) 0.033 0.029 0.027 0.0235 0.020 0.017 0.0133 H(m) 40 60 66 75 80 84 90 Efficiency % 20 45 55 68 75 66 45 The pump is used to pump water from a low reservoir to a high reservoir through a total length of 1100 m of pipe 250 mm in diameter. The difference between the water levels in the reservoirs is 25 m. Neglecting all losses except friction and assuming λ=0.042, calculate: i. The discharge and head at the duty point for the pump. (20) ii. The efficiency at the duty point. (5) [2arrow_forward
- The radial component of velocity of water leaving a centrifugal pump is 15 m/s. The magnitude of the absolute velocity of water at the pump exit is 30 m/s. Water enters the pump rotor radially. The pump has inner impeller radius of 0.05 m and outer impeller radius of 0.2 m. The impeller rotates at 2000 rpm. (a) (b) (c) (d) (e) Sketch the velocity triangle diagrams at the inlet and the exit of the centrifugal pump. Label each velocity vector clearly. Define U as absolute velocity of blade, V as absolute velocity of water, W as relative velocity of water. Determine the absolute velocity of blade at the inlet and the exit of the centrifugal pump. Determine the tangential component of velocity at the inlet and the exit of the centrifugal pump. Determine the radial component of velocity at the inlet of the centrifugal pump. Determine the relative velocity of water at the inlet and the exit of the centrifugal pump.arrow_forwardQUESTION 2 A centrifugal pump has the following characteristics: V (m³/h) H (m) n (%) 23 46 69 92 115 10.5 13.5 61 17 16 6.6 53 49.5 63.5 10 The pump is used to pump water at 25°C from a low reservoir to a high reservoir through a cast iron piping which is 800 m in total length, 15 cm diameter. The difference between the water levels in the reservoirs is 8 m. Neglecting all losses except friction find the power input to the pump. Use the information given to assume the friction factor and confirm that it is indeed correct.arrow_forward2. The characteristics of two centrifugal pumps at constant speed are as follows: Q(m3/s) 0.0 006 0.012 0.018 0.024 0.030 0.036 Pump A H(m) 22.6 21.9 20.3 17.7 14.2 9.7 3.9 n(%) 32 74 86 85 66 28 Pump B H(m) 1 6.2 13.6 1 1.9 11.6 1 0.7 9.0 6.4 n(%) 14 34 60 80 80 60 A pumps is required to lift water continuously through 3.2 m of vertical lift and the pipe to be used is 21 m long, 10 cm diameter and friction coefficient is 0.005. Select the more suitable pump between pump A and B for this duty and justify your selection. What power input will be required by the selected pump? [Pump B, 3.53 kW]arrow_forward
- B-A pump has the following parameters N=2133.5 RPM, Ns = 40 RPM, D= 37.1 cm and is used to pump water up to 90 m(H) at maximum efficiency operation: write the answer only (a) At what speed should the pump be operated to pump water up to (76 m)? (b) What is the discharge in each case? (c) What is pumping power needed in each case? (d) What is consumed electrical power in each case if max = 90%? e- A pump discharges liquid at the rate of Q against a head of H. If specific weight of the liquid is w, find the expression for the pumping power.arrow_forwardLook up the word affinity in a dictionary. Why do you suppose some engineers refer to the turbomachinery scaling laws as affinity laws?arrow_forwardA duplex, double acting reciprocating pump, has the following specifications: 30 cm x 20 cm x 30 cm. The piston rod diameter is 4 cm. Accomplishing 30 double strokes per minute. The liquid discharge 10 liter/minute at a head of 150 m. The suction pressure of the steam cylinder is 1.2 MPa at a steam rate of 176 kg/hr. Determine the following: a. Piston Displacement b. Volumetric efficiency c. Pump slip d. Pump Horsepower e. Pump Thermal Efficiencyarrow_forward
- A double acting compressor with a volume displacement of 0.432 m3/sec, delivers air at 725 KPa at a rate of 0.188 m3/sec. The inlet condition of air 100 KPa and 30 °C and the angular speed of the compressor is 200 RPM. For a compression and expansion processes given by PV1.3=C. Determine: a) The percent clearance of the compressor. b) The bore and stroke, in meters, assuming that the stroke is equal with the bore and the volume displacement of the crank end and head end are the same.arrow_forward1. A reciprocating compressor draws in 500 cubic feet per minute of air whose density is 0.079 lb/ft^3 and discharge it with density of 0.304 lb/ft^3. At the suction P1=15 psia; at discharge, P2=80 psia. The increase in the specific internal energy is 33.8 BTU/lb and the heat transferred from the air by cooling is 13 BTU/lb. Determine the work on the air in BTU/lb. Neglect change in kinetic energy.arrow_forwardC3 (1). A single-acting reciprocating pump has a bore of 162 mm and a stroke of 350 mm. When the pump runs at 54 rpm, it discharges 3.9 liters per second under a total head of 16 m. Determine (i) the theoretical discharge in m/s (i). the actual power required in Watts, (i) the coefficient of discharge and (iv) the delivery head, if the suction head is 4.8 m. Take the density of water= 1000kg/m g=9.81 m/s?arrow_forward
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Fluid Mechanics - Viscosity and Shear Strain Rate in 9 Minutes!; Author: Less Boring Lectures;https://www.youtube.com/watch?v=_0aaRDAdPTY;License: Standard youtube license