The impeller of a centrifugal pump having external and internal diameter 500mm and 250mm respectively, width at out let 50mm and running at 200rpm works against a head of 48m. The velocity of flow through the impeller is constant and equal to 3m/s the vanes are set back at an angle of 400 at outlet. Determine A.inlet vane angle B.workdone by the impeller on water per second c.manometric efficiency

The impeller of a centrifugal pump having external and internal diameter 500mm and 250mm respectively, width at out let 50mm and running at 200rpm works against a head of 48m. The velocity of flow through the impeller is constant and equal to 3m/s the vanes are set back at an angle of 400 at outlet. Determine A.inlet vane angle B.workdone by the impeller on water per second c.manometric efficiency

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter40: Typical Operating Conditions

Section: Chapter Questions

Problem 10RQ: The seasonal energy efficiency ratio (SEER) includes the energy used in the _____and _____cycles.

See similar textbooks

Similar questions

2. A centrifugal pump having extermal and intemal diamcters as 750 mm and 400 mm respectively is operating at 1000 r.p.m. The vancs are curved hack at 35° to the tangent at outlet. If the velocity of flow is constant at 6 m/s, find (a) vane angle at inlet, and (b) work done per kN of water. (Ans. 16°; 123 kJ)
A double acting cylinder is hooked up in the regenerative circuit. The relief valvesetting is 105 bars and the pump flow is 0.0016m˄3 / s. If the regenerative and retractingspeed are equal to 0.25m/ s, find the piston and rod area and also load- carrying capacityfor the:a. Extending strokeb. Retracting stroke
An axial flow pump discharges water at the rate of 78 m³/min and runs at 550 rpm. The total head is 10 m. Assume blade velocity of 22 m/s, flow velocity of 4.5 m/s, hydraulic efficiency of 0.87, and overall pump efficiency of 0.83. Calculate Cr OP 3.1. The power delivered to the water, and power input The impeller hub diameter and tip diameter 3.2. 3.3. The inlet and outlet blade angles for the rotor 30 07:30 S
The external and internal diameters of the impeller of a centrifugal pump are 0.3 m and 0.15 m respectively. The rotational speed of the pump is 1200 rpm and the vanes make an angle of 28° with the peripheral velocity direction at the outlet. The velocity of the flow through the impeller is constant at 1.7 m/s. Assuming the manometric efficiency of 82%, find the vane angle at the inlet (°). 18:19 /
18. A centrifugal pump has, to work against a head of 25 metres at a speed of 850 rpm.. The flow component of the velocity at outlet is 2 5 metres/second. The outlet vane angle is 40°." If the discharge of the pump is 0-25 cumec find (i) The diameter of the impeller and (ii) The width of the impeller at outlet. Neglect losses. (0:387 m; 0*082 m)
A pump has a specific speed of 45 and 600rpm when it delivers 0.01m3/s. Find the head developed by the pump in ft. Ans. 926.07
A piston positive displacement pump(PDP) has 8 in diameter and a 2.5in stroke. Its crankshaft rotates at 300rpm. Calculate its output at 94% volumetric efficiency. Answer: 20.51 cfm
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…
Seven hundred gallons per minute of water are being discharged by a centrifugal pump 5 ft above the pump inlet. The inlet pressure is 4-in Hg above the atmospheric and the discharge pressure is 29 psia. If the pump has an 8-in diameter inlet and a 4-in diameter discharge, find the new flowrate if thr pump speed is doubled. Assume the pump input is 8Hp. A. 700 gpmB. 1050 gpmC. 1400 gpmD. 1750 gpm
19. A centrifugal pump delivering 0 04 cumec of water to a height of 20 metres through a 10 cm diameter pipe 100 metres long. If the overall efficiency of the pump is 75% find the h.p. required to drive the pump. Take f 0'01. (51'83 hp)
1- A double jet of Pelton turbine driven by double nozzles to produce (4250 kw) to the shaft of an electrical generator when running at (400 rpm). The height of (180 m). wheel diameter is (1450 mm). The velocity of relative= 0.9 of jet velocity. If the angle of bucket is (165'), determine: a) Hydraulic efficiency b) Diameter of the jet
A single-stage centrifugal pump having a suction pipe 254 mm in diameter anda discharge pipe diameter of 5 inches is being tested and found out to discharge 48 lps ofwater. A pressure gage connected to the inlet pipe reads 118 mm Hg vacuum and adischarge gage reads 150 kPa at a distance 100 cm above the point where the inletpressure was measured. If the kW rating of the driving motor is 12 kW, calculate a) thepump efficiency. b) if this pump runs at 1800 rpm, what will be the new discharge rate,head, and power developed if the pump speed was increased to 3600 rpm? Assumeconstant efficiency. c) Determine the pump type.