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 is 54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mm respectively. The blades occupy 12% of the impeller area and the water is assumed to enter the impeller radially. Suction and delivery pipes are equal in size. Determine: 1.1 If the flow through velocity is consistent through the pump find the fluid velocity at outlet. 1.2

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 is 54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mm respectively. The blades occupy 12% of the impeller area and the water is assumed to enter the impeller radially. Suction and delivery pipes are equal in size. Determine: 1.1 If the flow through velocity is consistent through the pump find the fluid velocity at outlet. 1.2

Sustainable Energy

2nd Edition

ISBN:9781337551663

Author:DUNLAP, Richard A.

Publisher:DUNLAP, Richard A.

Chapter14: Ocean Thermal Energy Conversion And Ocean Salinity Gradient Energy

Section: Chapter Questions

Problem 14P

See similar textbooks

Similar questions

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…
Calculate the required pump power since the velocity of the water in the pipe is v=1.91 m/s pwater=1000kh/m^3 μ=1.307x10^-3
Point A in the suction pipe is 1 m below the pump. It is mounted with anopen manometer which reads a vacuum of 20 cm of mercury. The pipe is10 cm in diameter and the flow is 35 liters/s of water. Compute the totalenergy at point A with respect to a datum through the pump.
A centrifugal pump with an overall efficiency of 0.56 rotates at 1650 rpm. The flow is purely radial at the inlet of the rotor. The pump has the following characteristics: Flow rate Q = 72 L/s Inlet diameter D1 = 90 mm Outlet diameter D2 = 280 mm Head H = 25m Width at the inlet b1 =20 mm Width at the outlet b2 = 18 mm Leakage q = 2 L/s Mechanical loss Pm = 1.41 kW Blade angle at the outlet β2 = 35 ͦ The water density =998 kg/m^3,Atmospheric pressure 101 kPa a) Determine the hydraulic, mechanical and volumetric efficiencies. b)Determine the minimum number of blades required for the slip to not exceed 0.9. c)Determine the static pressure difference (P2-P1) through the impeller by using Bernoulli equation. d) Determine the available NPSH if the pump is placed 2m above the free surface of the tank and the vapor pressure is ?=2.43 ???.
Water flows from Resorvoir A (Elev 133 m.) to a turbine (Elev 76 m.) then discharges into tailtrace B (Elev 30 m.) as shown. the head loss from (A) to (1) is 2 times the velocity head in the pipe, and the head loss from (2) to (b) is 1.49 times the velocity head in the pipe. if the flow rate in the pipe is 35 ft63/S, diameter of all pipes is 25 in., calculate the horsepower generated by the turbine. Use 1 hp = 550 lb-ft/s.
It is proposed to build a three- stage centrifugal pump to deliver 4000 kg/min of water at a speed of 900 rpm under a total manometric head of 70 m. The vanes are to be radial at inlet and are to be curved backwards at exit at an angle of 45°. Assuming manometric efficiency of 84% and overall efficiency of 75% and considering that vane thickness accounts for 8% of circumferential area. The velocity of flow may be assumed constant at 2.5 m/sec. The h.p. input necessary is ؟
90.Water is pumped from the reservoir with a surface elevation of 200 m across the valley to another reservoir of surface elevation 216 m through a pipe line of 1300 m long and 30 cm diameter if during pumping the pressure is 5.6 kg/cm2 at a point half way along the pipe and at an elevation of 168 m. Compute the discharge and power of the pump taking friction factor as 0.02 neglect minor losses.
A pump is required to transfer water at the rate of 350 kg/s from an open sump to an open storage tank located 30m above the pump. The suction pipe is 350mm in diameter and 12m in length, and the delivery pipe is 550mm in diameter and 40m in length. The friction factor of the pipe system is f=0.005. Q1. Calculate the maximum height at which the pump may be placed above the sump, so that pressure at the inlet is not less than -80 kPa Q2. Calculate the energy to be supplied by the pump per unit mass of water transferred Q3. Calculate the input power required by the pump, which is 60 % efficient
A pump is required to transfer water at the rate of 350 kg/s from an open sump to an open storage tank located 30m above the pump. The suction pipe is 350mm in diameter and 12m in length, and the delivery pipe is 550mm in diameter and 40m in length. The friction factor of the pipe system is f=0.005. Q1. Calculate the maximum height at which the pump may be placed above the sump, so that pressure at the inlet is not less than -80 kPa (gauge) (m) Q2. Calculate the energy to be supplied by the pump per unit mass of water transferred (J/Kg) Q3. Calculate the input power required by the pump, which is 60 % efficient (kW)
Water at 10°C flows at the rate of 900 L/min from the reservoir and through the copper tube type K . Compute the pressure at point B, just considering the energy loss due to the straight pipe and neglecting the others losses(elbows and tank outlet)
A pump is required to transfer water at the rate of 350 kg/s from an open sump to an open storage tank located 30m above the pump. The suction pipe is 350mm in diameter and 12m in length, and the delivery pipe is 550mm in diameter and 40m in length. The friction factor of the pipe system is f=0.005. Q. Calculate the maximum height at which the pump may be placed above the sump, so that pressure at the inlet is not less than -80 kPa
If the flow of 0.10 m3/s of water (mu = 1.31 x 10-3 Pa.s) is to be maintained in the system shown, what power must be added to the water by the pump? The pipe is made of steel and is 15 cm in diameter. Neglect minor losses. TV