Concept explainers
The performance data of a water pump follow the curve fit
Want to see the full answer?
Check out a sample textbook solutionChapter 14 Solutions
Fluid Mechanics: Fundamentals and Applications
- A pump delivers 20 cfm of water having a density of 62 lb/ft3. The suction and discharge gage reads 5 in. Hg vacuum and 30 psi respectively. The discharge gage is 5 ft above the suction gage. If pump efficiency is 70%, what is the motor power in Hp?arrow_forwardProblem #2: A velocity distribution is given as V = Please calculate the work flux (Iv) associated with molecular motions. -bx8,-byô, + bz8, where b is a constant and b‡0.arrow_forwardQUESTION 1 Three pipes A, B, and C are interconnected as shown in figure 1. The pipe dimensions are as follows: D (cm) 15 10 20 Pipeline L (m) 300 0.01 B 240 600 0.01 0.005 A 15 m 25 m B Figure 1 1.1 Find the rate at which water will flow in each pipe, ignoring the shock losses at P and entry to pipelines A and B. 1.2 Find the pressure at P.arrow_forward
- A closed thermodynamic system consists of a fixed amount of substance (i.e. mass) in which no substance can flow across the boundary, but energy can. For a closed themodynamic system we cannot add energy to the system, via substance (E ) (1.e. matter which contains energy is not allowed across the boundary) Across the Boundaries E° = No Q = = Yes W mass NO CLOSED = Yes SY STEM m = constant | energy YES Figure 1.1. If the substance inside the thermodynamic system shown in figure 1.1. (i.e. piston cylinder device) is air, is the system a Fixed closed system Moveable closed system A. В.arrow_forwardThree pipes A. B, and C are interconnected as shown in figure 1. The pipe dimensions are as follows: Pipeline A D (cm) 15 10 L (m) 300 240 600 0.01 0.01 0.005 B 20 A 15 m 25 m B Figure 1 1.1 Find the rate at which water will flow in each pipe, ignoring the shock losses at P and entry to pipelines A and B. 1.2 Find the pressure at P.arrow_forward2. The diameters of the suction and discharge pipes of a pump are 15 and 10 cm, respectively. The discharge pressure is read by a gage at a point 1.5 m above the centerline of the pump and the suction pressure is read by a gage 0.6 m below the centerline. If the pressure gage reads 140 kPa and the suction gage reads a vacuum of 21 cm Hg when gasoline is pumped at the rate of 35 l/sec (sg of gasoline is 0.75) a. Find the energy added by a pump. (. b. Find the power delivered to the fluid in kW. c. Find the required rating horsepower of the pump if it has an efficiency of 75% 0.10 mg Pz=140 kPa 1.5 m 0.6 m KD Pj=-0.21 m Hg 0.15 møarrow_forward
- fluid mechanics A pipe 200 (mm) diameter carries Oil at a flow rate of 0.030 (m³/s). The pipe diameter reduces from 200 (mm) to 150 (mm). Point 1 is located at the beginning of the pipe and point 2 is located at the end of the pipe. Elevation of point 1 is 165 (m) lower than elevation of point 2. Water pressure at point 2 is atmospheric pressure. Water flow in the pipe ascending from point 1 to point 2. Total head losses of flow in the pipe equals to 15 (m). 1- Find the value of pressure head of Oil at point 1. 2- Draw the H.G.L. of flow in the pipe.arrow_forwardEngineering economics Investing in Electrical Efficiency Two pumps capable of delivering 100 hp to an agricultural application are being evaluated in a present economy study. The selected pump will only be utilized for one year, and it will have no market value at the end of the year. Pertinent data are summarized as follows: ABC Pump XYZ PumpPurchase price $2,900 $6,200Maintenance cost $170 $510Efficiency 80% 90% If electric power costs $0.10 per kWh and the pump will be operated 4,000 hours per year, which pump should be chosen? Recall that 1 hp = 0.746 kW. Choose XYZ because it provides least cost.arrow_forwardAs a young engineer, you have been tasked to select the location of a wind turbine based on the details of the location and relevant specification below:Air densityAverage air velocityDiameter of wind turbine bladesLOCATION A1.29 kg/m3 54 km/h 70 mLOCATION B1.21 kg/m3 63 km/h 60 m By comparing the amount of power generated (in MW) at Location A and Location B, determine the location that will give the optimum wind power generation.9 kg of Refrigerant 134-a is initially at 26.69°C with enthalpy of 100 kJ/kg. Heat is transferred to the refrigerant under a constant-pressure process until the entropy of the refrigerant reaches 0.9795 kJ/kg.K.(i) Determine the final temperature of the refrigerant(ii) Calculate the boundary work, Wb, in kJ.Assist your answer with a proper P-v diagram indicating the properties,process, and boundary work region clearly.(iii) Explain the reason behind the high amount of boundary work obtained in (ii).Assist your explanation with relevant sketching.arrow_forward
- 1. Start from the following equations from class notes (treat as given): The shear stress in pipe flow T = -μ- dr du 16 [1-(-)²), AP D² 16μL The fluid velocity in the pipe u = Derive clearly the following results: (a) The shear stress on the wall of the pipe, Tw. (b) The average velocity in the pipe flow, ū. (c) The Darcy friction factor, defined by f where L is the length of the pipe. 8 tw pū² (d) Express the result of (c) in terms of the Reynolds number, Re. (e) Find an expression for the head loss due to shear stress at the wall, AH₁, in terms of f,u, D and L. (f) What are the main assumptions in the fluid flow, in order to analyse the flow in this way?arrow_forwardThe pressure of water flowing through a pipe is measured by the arrangement shown below. For the values given, calculate the pressure in the pipe. Po=30 kPa Air Pipe Waler 15°C Water hy = 50 cm 15°C L=6 cm h = 8 cm 4=6 cm Ciage fluid SG = 24arrow_forward1- In steady flow,the fluid characteristics at a point do not change with B- pressure ..... Pa. 2- The value of atmospheric pressure Patm at sea level is A- Patm = 101300 Pa B- Patm= 100000 Pa C- Patm = 1000000 N/m² A- Time 3- The value of static pressure at a point in a liquid depends on ........... A- Surface area B- height of liquid C- width of tank 4- Piezometer is used for measuring. Pressures. A- High B- low 5- The rate of volume flow Q is expressed as. C-meduim A- Q = mass x velocity B- Q = force x density C- force A- Time C- Q = area x velocity 6- If the value of Reynolds number is more than 3000 the flow is called A- transition B- laminar C- turbulent A-high 7- In uniform flow the velocity at any given time does not change with respect to. B- pressure C- space B- The value of static pressure in a liquid depends on .......... ..............above the point. B- height of liquid C- width of tank A- Surface area - The unit of mass flow rate (m) is. A- M³/S B- N/M² ..........above…arrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY