2 for the system shown in Figure 2, the parameters of pump and motor are as115mL/r , speed of pumpПрp max =follows: maximal displacement of pump1mp = 0.9, total efficiency of pump1000r/min, mechanical efficiency of pumpVN mmm = 148mL/r, mechanical efficiency of motor= 0.84; displacement of motor%3D=0.9, total efficiency of motor Im = 0.84, the permitted maximum pressure in pipePr =8.3Mpa, if the pressure losses in pipeline is not considered, calculate:1) Maximal speed of motor, and the output power and output torque at this speed2) the input driving torque of pumpFigure 2

According to the given information of the system, we have the following parameters which are given…

2 for the system shown in Figure 2, the parameters of pump and motor are as follows: maximal displacement of pump V, pmаx 115ML/r , speed of pump Nmp 1000r/min, mechanical efficiency of pump = 0.9, total efficiency of pump = 0.84; displacement of motor V 148mL/r, mechanical efficiency of motor Nmm m = =0.9, total efficiency of motor "m = 0.84, the permitted maximum pressure in pipe || Pr = 8.3Mpa, if the pressure losses in pipeline is not considered, calculate: 1) Maximal speed of motor, and the output power and output torque at this speed 2) the input driving torque of pump Figure 2

2 for the system shown in Figure 2, the parameters of pump and motor are as follows: maximal displacement of pump V, pmаx 115ML/r , speed of pump Nmp 1000r/min, mechanical efficiency of pump = 0.9, total efficiency of pump = 0.84; displacement of motor V 148mL/r, mechanical efficiency of motor Nmm m = =0.9, total efficiency of motor "m = 0.84, the permitted maximum pressure in pipe || Pr = 8.3Mpa, if the pressure losses in pipeline is not considered, calculate: 1) Maximal speed of motor, and the output power and output torque at this speed 2) the input driving torque of pump Figure 2

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Problem-4: The characteristics for a pump are given in the table below. The pump is required to left water against static head Az = EN" m. The pipe arrangement has a total length L the pump discharge, head, efficiency and power for the given pipe system. 200, d = 0.1 m and f= 0.016. Find %3D Q (L/s) 10 20 30 35 42 50 Hp (m) efficiency % 210 201 180 150 129 93 48 30 58 80 85 86 74 EN=62 Hp = Az + h, = Az + 12.1 d P = 757
P (6-5) Two centrifugal pumps are connected in parallel in a given pumping system. Plot total head Ah against capacity Q pump and system curves for both pumps running on the basis of the following data: Operating data for pump 1 Operating data for pump 2 Ahm, 40.0 35.0 30.0 25.0 Ah m. 0.0 35 30 25 Qim³/h. 169 209 239 265 Q₂m/h 0 136 203 267 data for system Ah m, 20.0 25.0 30.0 35.0 Q.m³/h, 0 244 372 470
7. Pump 50mm Þ 17m Data: f = 0.0067 Pressure at 3 = 194 kN/m² gauge Velocity at 3 = 2.7 m/s p = 830 kg/m³ Pump efficiency = 88% Motor efficiency = 84% Pressure at 1 is atmospheric Velocity at 1 is negligible Determine required input power to motor [1.64 kW] 8. 200mm turbine water gen Data: At 1, p = 230 kN/m² gauge, v = At 2, p = 0 = 0 gauge, v = 0 Turbine efficiency = 80% Generator efficiency = 90% 3.6 m/s %3D Determine output power from generator [19.3 kW]
A 2:1 scale model of a pump was tested in a laboratory at 900rpm, head 20m and discharge 10 l/s. If the speed of prototype was 1500rpm, determine the head and discharge.
Air is compressed by a compressor in steady-state operation, i.e. the inlet mass flow rate qm is constant in time. The compressor is airtight. The area of the inlet and outlet cross-section is A and AOUT, respectively. The outlet-to-inlet density ratio is PouT PIN the outlet-to-inlet mass flow rate ratio is 9m-OUT/9m-IN- What is the outlet-to-inlet volume flow rate ratio? 9V-OUT/av-IN =? Select one: a. 9V-OUT/av-IN = (A OUT'A IN) (POUT PIN b. 9V-OUT/av-IN = PIN/POUT C. 9V-OUT/av-IN = 9m-OUT/ 9m-IN d. 9V-OUT/av-IN=AOUTAIN
The characteristics of a centrifugal pump operating at 1000 rpm is given by H=45-21002. The system characteristics may be represented by H = 28+3200². The units for volume flow rate Q and head H are m³/s and m, respectively. Assume the validity of the pump similarity laws. When one pump operating at 2000 rpm is used, with the system characteristics remaining unchanged, the operating volume flow rate is m³/s.
A 2:1 scale model of a pump was tested in a laboratory at 750rpm, head 20m and discharge 10 1/s. If the speed of prototype was 1500rpm, determine the head. (hint : use equation of flow coefficient)
Example (6-1): At the best efficiency point a centrifugal pump, with impeller diameter D=8 in, produces H= 21.9 ft at Q=300 gpm with N=1170 rpm. Compute the corresponding specific speed using a) U.S. customary units. B) SI units (rad/sec, m/sec, m'/sec").c) European units (rev/sec, m/sec, m/sec?). Develop conversion factors to relate the specific speeds.
For the model pump below (impeller size: 37.1 cm; shaft speed: 2133.5 rpm), if it is operated to achieve a pump efficiency of 60% at a discharge within the range between 0 and 0.25 m³/s, using a shaft speed of 1800 rpm instead, what will most approximately be the power coefficient? Assume water density 1000 kg/m³. 250 Head, m; power, kW 200 150 100 000 0 50 O 0.69 O 0.73 O 0.88 O 0.52 Efficiency 0.05 Head (AH), m N=2133.5 rpm = 35.6 rps D = 37.1 cm 0.15 Discharge, m³/s 0.10 Power input, kW 0.20 0.25 100 80 60 40 20 0
A 2:1 scale model of a pump was tested in a laboratory at 750rpm, head 20m and discharge 10 1/s. If the speed of prototype was 1500rpm, determine the head use formula of flow coefficient
The characteristics of a centrifugal pump operating at 1000 rpm is given by H=45-2100². The system characteristics may be represented by H = 28+3200². The units for volume flow rate Q and head H are m³/s and m, respectively. Assume the validity of the pump similarity laws. When one pump operating at 2000 rpm is used, with the system characteristics remaining unchanged, the operating volume flow rate is m³/s. X 0.179 Correct Answer: 0.5355
Problem 1 a) In an open vessel, a certain volume V of water is perfectly agitated by means of an impeller 20 cm in diameter D. Consider a case in which the impeller steadily rotates at 150 RPM (=revolutions per minute) Draw up a proper energy balance to find how temperature changes with time as a result of the power input øw, also named P, by the revolving impeller. • This Pis given by the formula P = 3.5 PN°D° in which N denotes the impeller speed in revolutions per second. Calculate P. When V = 120 litre and the specific heat of water amounts to 4.2 kJ/kgK, calculate the temperature increase of the water after one hour of stirring.