which is 14.17 m above the tank bottom and discharges to the atmosphere with a velocity in the nozzle of 20.1 m/s. The water flow rate is 50 kg/s. The efficiency of the pump is 77% and 9 kW are furnished to the pump shaft. a. Draw the diagram b. The friction loss in the pump. c. The friction loss in the rest of the process.
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a. Draw the diagram
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- 1. As a junior city engineer of a municipality, you are tasked to design the specifications of the pump with 3650 cu.m/day. The water source in the municipality is from an open reservoir and will supply to a pressure tank that will distribute to the municipality. open 4l Pressure reservoir Tank 70 m 15 m Pump Determine the following specifications of the pump and piping system (assume fluid stagnation at the pump). Velocity head at pt.1 to 2 if the diameter of the pipe is a.) 200 mm b.) Suction pressure of the pump in kPa (Pressure at pt. 2). c.) Velocíty head at pt.3 to 4 if the diameter of the pipe is 150 mm d.) Discharge pressure of the pump in kPa (Pressure at pt. 4). Assume atmospheric pressure at the pump. If an air vent is installed at the pipe just right before the pressure tank with diameter of 20 mm, what is the velocity of discharge in m/s? The height of the pressure tank is 12 m, what is the flowrate in cu.m/hr at pt.5 if the diameter of the pipe is 150 mm? e.) f.)3. For a Pelton turbine the pressure of the flow before the nozzle is 5 bar while the velocity of flow leaving the nozzle is 31m/s. If the speed of the turbine is 500 rpm and the wheel diameter is 1.5 m, the efficiency of the nozzle will be: а. 0.96 b. 0.97 c. 0.98 d. 0.99 e. None of the them.A pump takes water from an 8 inch suction pipe and delivers it to a 6 inch pipe in which the velocity is 8 feet per second. At a point along the suction pipe, a pressure of 6 psi is observed while a pressure of 60 psi is observed along the discharge pipe, 15 feet higher than the previous point. Whathorsepower must be supplied to the pump of efficiency 80 percent to maintain the system. *can you also provide its figure, Thank you.
- QUESTION 1:A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mmrespectively. The blades occupy 12% of the impeller area and the water is assumed toenter the impeller radially. Suction and delivery pipes are equal in size.Determine:1.1The impeller inlet (i) diameter and inlet blade velocity.(Hint - Substitution: ln in terms of D and U, in terms of D, both sub into Tan of Blade inlet angle,only unknown is then solving for Dz)1.2.If the pump has a mechanical efficiency of 80%, calculate the blade velocity atoutlet (U.) and outlet whirl velocity Vw.. Assume the blade exit angle equal to theguide vane angle. (Hint - Substitution: Write Vw in terms of U, sub in Euler equation onlyunknown then is solve for Vwo)1 3Impeller outer diameter.1.4,If the flow through velocity is consistent through the…2. A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300 kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mmrespectively. The blades occupy 12% of the impeller area and the water is assumed toenter the impeller radially. Suction and delivery pipes are equal in size. Determine:2.1. The impeller inlet (i) diameter and inlet blade velocity. (Hint - Substitution: Vfi in terms of Di and Ui in terms of Di both sub into Tan of Blade inlet angle, only unknown is then solving for Di2) 2.2 If the pump has a mechanical efficiency of 80%, calculate the blade velocity at outlet (Uo) and outlet whirl velocity Vwo. Assume the blade exit angle equal to the guide vane angle. (Hint - Substitution: Write Vwo in terms of Uo sub in Euler equation only unknown then is solve for Vwo 2.3 Impeller outer diameter. 2.4 If the flow through velocity is consistent…For the single pump-pipe system below, what will be the changes for the operating point if we increase the pipe size but decrease the shaft speed of the pump? EB H₂ O The operating point will remain the same. O The operating point will occur either at a higher discharge or at a lower discharge, depending on the specific influence of each change. O The operating point will occur at a higher discharge. O The operating point will occur at a lower discharge.
- The performance characteristics of a certain centrifugal pump are determined from anexperimental setup shown in the figure. When the flow rate of a liquid (SG= 0.9) through thepump is 120 gpm, the pressure gage at (1) indicates a vacuum of 95 mm of mercury and thepressure gage at (2) indicates a pressure of 80 kPa. The diameter of the pipe at the inlet is110 mm and at the exit it is 55 mm.If Z2-Z1= 0.5 m, what is the actualhead rise across the pump? Explainhow you would estimate the pumpmotor power requirement.3. A centrifugal pump is to be placed above a large, open water tank, as shown in the figure below. Water is pumped at a rate of I cu ft/s. At this flow rate the required net positive suction head, NPSHR, is 15 ft as specified by the pump manufacturer. The water temperature is 80°F and atmospheric pressure is 14.7 psi. Assume that the major head loss between the tank and the pump inlet is due to filter at the pipe inlet having a minor loss coefficient KL.-20. Other losses can be neglected. The pipe on the suction side of the pump has a diameter of 5 in. The water vapor pressure at 80°F is 0.5069 psia and y-62.22 lb/cu.ft. Determine Z1 for cavitation not to occur.. P1-Patm (1) (2) Reference plane4. A pump is used for the pumping of water from Tank A into Tank B in which the height difference between the surface levels of water is 20 m. The pipe diameter is 400 mm and the pipe length is 2500 m, the coefficient of friction is f 0.0025 and the pump works at a speed of 700 rpm. The characteristics of the pump are shown in Table 4 below You are required to: (a) (10 points) Intepret pump characteristic and system characteristic ina graph. (b) (10 points) Calculate the input and output power at the operating point. 0.1 0.2 0.3 0.35 0.4 0.5 15 17 18 16 14 O30 60 SI83.80 45 H. (m) 11 Table 4: Data of the pump from the Manufacturer
- 2. A pump draws water from a lake delivered to a height of 50 meters above the lake and encounters 15 meters of headloss. Determine the pump power requirement in Kilo-Watts to deliver a constant supply of 500 Liters per second? The correct answer has a margin of 1 from exact answer. Velocity head is neglected.A system pumps water from a lower reservoir to a higher reservoir. The pipe diameter is 0.245 m and the pipe lengths are L1= 5 m, L2= 3 m, L3= 3 m, and L4= 0.3 m. The impeller of the centrifugal pump has a diameter of 0.5 m and operates at 900 rpm. The uniform blade height is 56 mm. The water enters the pump parallel to the pump shaft with a flow rate of 0.19 m3/s. Take viscosity as 0.00112 N s/m2. What would be the shaft power required to turn the impeller if the exit blade angle is 50 degrees. Work to 4 significant digits. Enter all values using base units or their combinations, i.e. m, m/s, Pa, N. Do not use multiples as e.g. mm, kPa. You can use values with exponents, such as 0.12e3.What type of impeller should be selected for pumping water (60°F) at 1200 rpm for a pump head of 750 ft and discharge of 15 cfs? O Mixed-flow impeller O Laminar-flow impeller O Radial-flow impeller O Axial-flow impeller