1.3 Centrifugal pump power calculation online Efficiency and Input Power of the Pump The work performed by the pump is equal to the weight of liquid pumped in Unit time multiplied by total Head in meters. However the pump capacity in M3/hr and liquid specific gravity are used rather than weight of liquid pumped for work done by the pump. Working Principle of Centrifugal Pump The pump works on the principle of the forced vortex flow. it means when a mass of liquid is rotating by an external torque, the rise in pressure head of the rotating liquid takes places. The rises in pressure head at any point is directly proportional to the velocity of the liquid at that point. 7.1. General Pump Theory. Consider the pump shown in Figure 10.3. The work done by the pump, per unit mass of fluid, will result in increases in the pressure head, velocity head, and potential head of the fluid between points 1 and 2. Therefore: work done by pump per unit mass = W/M; increase in pressure head per unit mass High-Density fluids do not work with centrifugal pumps. The higher the density, The more work must be done by the pump to push the fluid. This creates less than ideal conditions for performance and maintenance due to the increased need for power and maintenance. 9 Different Types of Rotary Pumps + PDF July 5, 2022. The 5 Best Well Pump in Hydraulic Machines MCQs on "Work done by Centrifugal Pump". 1. The fluid gains _________ while passing through the impeller. a) Velocity. b) Pressure. c) Temperature. d) Velocity and pressure. Answer: d. Clarification: The fluid gains both velocity and pressure while passing through the impeller. VELOCITY DIAGRAM AND WORK DONE BY IMPELLER • Centrifugal pump acts as a reversed of an inward radial flow reaction turbine. • Assumptions made for analysis are:- 1. Liquid enters the impeller in radial direction 2. No energy loses in impeller due to friction and eddy formation 3. Liquid enters without shock 9. VELOCITY DIAGRAM 10. centrifugal pressure and air/vacuum pressures. In this model, the centrifugal and air/vacuum pressures are against to the capillary pressure. The magnitudes of the pressures applied on a sample (0.5 mm x 0) are in the range of the capillary pressure, the centrifugal pressure at a 1500 G-force and air pressures (100 kPa). The efficiency of a centrifugal pump can be defined as the ratio of the output power (water) to the input power (shaft). It can be demonstrated by using the following equation. Ef = PW / PS Where, Ef is efficiency Pw is the water power Ps is the shaft power Centrifugal pumps.pdf from CIVIL ENGI 407 at U.E.T Taxila. Centrifugal Pumps PUMP a device that moves fluids • A pump is (liquids or gases), or sometimes slurries, by mechanical action. • Overall Efficiency: It is the ratio of actual work done by the pump, Before we understand the overhauling procedure, let's first examine how to start the pump in the right way. Open the suction valve (suction nozzle). Ensure that the discharge valve (discharge nozzle) is kept in the closed position. Turn the pump's power off. Next, manually turn the shaft (this is the shaft between the pump and motor). Centrifugal pumps - charactersistics Page: 4 from 12 3. The UNIT 3.1. Basic description The unit FM21 that is shown on Figure 2 consists from two centrifugal pumps (1) and (2) driven by motors. Pumps are placed on the platform and connected to reservoir (3) via pipelines. The unit enables to study op