Fluid Mechanics: Fundamentals and Applications
4th Edition
ISBN: 9781259696534
Author: Yunus A. Cengel Dr., John M. Cimbala
Publisher: McGraw-Hill Education
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Chapter 14, Problem 84CP
To determine
The total electric power consumption.
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Chapter 14 Solutions
Fluid Mechanics: Fundamentals and Applications
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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- A reaction turbine has guide vanes at an angle of 30° and the runner blades make an angle of 80° relative to the tangent at inlet. The blades width at the inlet is 4 of the outer diameter. The water does not have any tangential velocity at the outlet. The head is 25 m and the rotational speed of the runner is 16.67 rotations per second. The turbine efficiency is 88 %. Determine the turbine runner diameter at the inlet and the power developed.arrow_forwardA reaction type hydro-electric plant use a 95% efficiency generator to produce its rated output of 20MW. It was observed during its operation that the mechanical loss is 2.5MW. Also from the penstock down to the turbine, 20% hydraulic head loss and 15% leakage loss occur which are equally distributed and based on the parameters at the dam. The average elevation from the headrace to the turbine is 30 m and from the tailrace to the turbine is 5 m. Compute the ff: a. Power by the turbine, kW b. Volume flow rate at the source, m3/s c. Power by the jet, kW d. Mechanical Efficiency, %arrow_forwardA power plant requires 940 L/min of water. The required net head is 5 m at this flow rate. An examination of pump performance curves indicates that two centrifugal pumps with different impeller diameters can deliver this flow rate. The pump with an impeller diameter of 203 mm has a pump efficiency of 73 percent and delivers 10 m of net head. The pump with an impeller diameter of 111 mm has a lower pump efficiency of 67 percent and delivers 5 m of net head. What is the ratio of the required brake horse power (bhp) of the pump with 203-mm-diameter impeller to that of the pump with 111-mm-diameter impeller? (a) 0.45 (b) 0.68 (c) 0.86 (d) 1.84 (e) 2.11arrow_forward
- 1. A pump delivers 50 L/s of water and consumes 10HP of power by the pump system. Determine head developed by the pump. 2. A pump receives 8 kgs of water at 220 kPa and 110°C and discharges it at 1100 kPa. Compute the power required in kW. 3. A water pump develops a total head of 200 ft. The pump efficiency if 80%and the motor efficiency is 87.5 %. If the power rate is 1.5 cents per kw-hr, what is the power cost for pumping 1000 gal? 4. A hydraulic turbine receives water from a reservoir at an elevation of 100 m above it. What is the minimum water flow in kg/s to produce a steady turbine output of 50 MW? 5. A hydro-electric plant discharges water at the rate of 0.75 m³/s and enters the turbine at 0.35 mps with a pressure of 275 kPa. Runner inside diameter is 550 mm, speed is 520 rpm, and the turbine efficiency is 98%. Find the turbine speed factor. 6. A double overhung impulse turbine of 85% efficiency is direct connected to a 30,000 kW generator of 95% efficiency. Elevation of…arrow_forwardA 10-hectare rice land is to be irrigated at the peak water requirement of 10 mm/day. The source of water is pump from a river with outlet discharge directly to the irrigation canal. If the pump operates at 10 hours per day, what should be the capacity of the pump? What should be the size of engine if the total dynamic head is 10 meters. Assume pump efficiency to be 80 percent and engine to be 75 percent.arrow_forwardThe proposed hydroelectric power plant has the following data: Normal head water surface, 197 m, Normal tail water surface, 35 m, Loss of head due to friction, 5% of the gross head, Turbine discharge at full gate opening, 70 m 3 /s, Turbine Efficiency, 90 %, Variation in head, 5 m. Three turbines are to be installed with one twice the capacity of each of the other two similar units all having the same efficiency. Determine: The type of turbine to be used. The capacity of each turbine.arrow_forward
- In a large pumped hydro plant, the head from the turbine to the lake surface is 100m. During a period of 8 hours of excess electricity in the grid the pumped hydro plant pumps water back into the top reservoir. If the combined efficiency of the pump is 70% and the plant has a capacity of 50 MW how much water is pumped back up to the top reservoir? Assume the head remains constant during pumping. A. 0.5 x 10 – 1.0 x 10 m B. 1.1 x 10 – 1.5 x 10° m C. 1.6 x 105 - 2.0 x 10 m D. 2.1 x 10° - 2.5 x 10 m3arrow_forwardA remote community in the Mountain Province plans to put up a small hydroelectric power plant to service six (6) closely located barangays estimated to consume 52, 650, 000 kw-hrs annually. The expected flow of water is 1665 m-/min. The most favorable location for the plant fixes the tail water level at 480 meters. The manufacturer of the turbine-generator set has indicated the following performance data: turbine efficiency = 87%; generator efficiency = 92%; loss in headwork will not exceed 3.8% of available head. In order to pinpoint the most suitable area for the dam, determine: (a) the head water elevation in metersarrow_forward7. A hydro-electric power station is supplied from a catchment area of 480 km? with an annual rainfall of 1100 mm and effective head of 40 metres. 20% of the rainfall is lost due to evaporation etc. The loss of head in the penstock is estimated to be 10%. The turbine efficiency is 85% and the generator efficiency is 92%. Find capacity of the plant assuming the load factor to be 0.6.arrow_forward
- At a hydroelectric plant the difference in elevation between the surfaace of the water at the intake and at the tailrace is 183m (600ft). When the flow is 80 cfs, the friction loss in the penstock is 60 ft and the head utilized by the turbine is 460 ft. The mechanical friction in the turbine is 100hp, and the leakage loss is 3 cfs. Find (a) hydraulic efficiency; (b) volumetric efficiency; (c) power delivered to shaft; (d) brake horse power, (e) mechanical efficiency; (f) over-all efficiency.arrow_forwardWhat is the pressure drop in the turbine? Answer: 1176.91 kPa (replace “turbine pressure drop” for “pump pressure increase”)arrow_forwardA 30 MW power plant uses a double overhung Pelton Turbine under the net head of 400 m at its inlet. Find the jet diameter, mean runner diameter and runner speed of the turbine. Assume generator efficiency 95%, mechanical efficiency 95%, hydraulic efficiency 90%, coefficient of velocity 0.95, speed ratio 0.46 and jet ratio 10.arrow_forward
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