1. A centrifugal pump operating under steady flow conditions delivers 2270 kg per minute of water from an initial pressure of 82, 740 pascal to a final pressure of 275 800 pascal. The diameter of the inlet pipe to the pump is 15.24 cm and the diameter of the discharge pipe is 10.16 cm. What is the work in J/kg and kJ/min?

1. A centrifugal pump operating under steady flow conditions delivers 2270 kg per minute of water from an initial pressure of 82, 740 pascal to a final pressure of 275 800 pascal. The diameter of the inlet pipe to the pump is 15.24 cm and the diameter of the discharge pipe is 10.16 cm. What is the work in J/kg and kJ/min?

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

The operating point for a given pump of a series pipeline system is ___________ A. Intersection point of the efficiency curve and the SRC curve B. Intersection point of the total head curve and the SRC curve C. Intersection point of the total head curve and the efficiency curve D. Intersection point of the input power curve and the SRC curve
A centrifugal pump operating under steady flow conditions delivers 2,813 kg/min of water from an initial pressure of 86,976 Pa to a final pressure of 296,902 Pa. The diameter of the inlet pipe to the pump is 19.82 cm and the diameter of the discharge pipe is 11.28 cm. What is the work in J/s?
1) A plot of pump net head is shown below. Two curves are drawn: blue color curve and red color curve. Which one is called pump performance curve? Will the location of pump performance curve change if the velocity of the fluid at pump outlet changes? a) red curve; No, the location will not change b) blue curve; yes, the location will change c) red curve; yes, the location will change d) blue curve; No, the location will not change 2) In a turbine system, states A and B are homologous. If the net head ratio HA/HB =16 , volume flow rate ratio VA˙/VB˙=9. What is the diameter ratio DA/DB ? a) 3/2 b) 6 c) 12 d) 2/3
A centrifugal air compressor compresses 200 cfm from 12 psia to 90 psia. The initial specific volume is 12.6 ft3/lb and the final specific volume is 3.25 ft3/lb. If the inlet suction line is 4 in. ID and the discharge line is 2.5 in. ID, determine (a) the change in flow work between the boundaries, ft-lb/min; (b) the mass rate of flow, lb/min; and (c) the change in velocity. Answer: (a) 324,000, (b) 15.88, (c) -12.9 fps
A sewage aeration blower running at 3,500 rpm is designed to deliver 34,000 m3/hr of air from 20°C and 1.03 kg/cm2 atmospheric pressure to a discharge pressure of 1.56 kg/cm2 with an efficiency of 70%. On a hot summer day, the atmospheric temperature rises to 43°C but the barometric pressure does not change. It is desired to vary the blower speed to maintain the same discharge pressure. Determine the blower speed, in RPM, for the summer operation.Determine the Brake Horsepower required, assuming that the efficiency remains constant and assume a mechanical efficiency of 0.9 (k = 1.4 for air).Determine corresponding flow in nominal meter cube per hour.
A sewage aeration blower running at 3,500 rpm is designed to deliver 34,000 m3/hr of air from 20°C and 1.03 kg/cm2 atmospheric pressure to a discharge pressure of 1.56 kg/cm2 with an efficiency of 70%. On a hot summer day, the atmospheric temperature rises to 43°C but the barometric pressure does not change. It is desired to vary the blower speed to maintain the same discharge pressure. Determine the blower speed, in RPM, for the summer operation. Determine corresponding flow in nominal meter cube per hour. Determine the Brake Horsepower required, assuming that the efficiency remains constant and assume a mechanical efficiency of 0.9 (k = 1.4 for air).
A centrifugal pump driven by a 120-kW motor rotating at 2400 rpm is used to pump 20°C water in a manufacturing plant. The pump operates against a head of 30 m and has an efficiency of 70%. If this pump is used against a head of 60 m, how much water (in m3/s) can the pump circulate?
A turbine is driven by a system that enters the turbine at the ff. conditions: 200 kg/h, 39 atm, 501 deg C, 49 m/s linear speed. The steam exits at a point 8 meters below the inlet stream of the turbine with the following conditions: atmospheric pressure, 290 m/s speed. 69000 W of shft work is delivered by the turbine while 100 kcal/h heat is lost. What is the value of (a) expansion work and (b) flow work? If the value is zero, explain why is it so.If it cannot be calculated, explain why.
A tidal power plant of single basin type, has a basin area of 25 x 10 to power 6 m2. The tide has a range of 10m. The turbine however, stops operating when the head on it falls below 2 m. Calculate the energy generated in one filling process, in KWh if the turbine generator efficiency is 75%. (Density of sea water = 1025 kg/m2)
When two similar pumps operates in parallel, the volumetric capacity of the system changes by a factor of ?
Water flows through a horizontal coil heated by steam condensing on the outside. If the inlet pressure and temperature are 2 atm and 160°F (state 1) and at the exit 1 atm and 220°F (state 2), calculate the heat added to the coil per pound mass of water. The entering velocity in 5 ft/s, and the leaving, 500 ft/s. Data: H1=127.9 BTU/lb, H2=1154.4 BTU/lbA. 1031 BTU/lbB. 1042 BTU/lbC. 1048 BTU/lbD. 1052 BTU/lb
A reciprocating air compressor takes in air at 1 bar, 25 deg. C, and compresses it to a pressure of 5 bar running at 300 rpm. The compression follows the PV1.3=C. The clearance is 4% of stroke volume and mass flow rate of air 0.1 kg/s. Determine the power input to the compressor, and volumetric efficiency. Represent the process on p-v and T-s planes. Assume for air R=287 J/kg.K