Centrifugal Pump Characteristics:
A sub-class of dynamic axisymmetric which work under the absorbing turbo machinery is called Centrifugal pump.In this pump, we can transfer the liquid by converting the rotational kinetic energy of the fluid flow into the hydrodynamic energy.
Usually, by the use of electric motor or engine we can generate the rotational energy. Near to the rotating axis, the fluid enters the pump impeller and also enhanced by it. After that it started to flow the radially outward into volute chamber, from where it exits.
Characteristics of Centrifugal Pumps:
The Main Characteristics of Centrifugal Pumps are as follows:Capacity:
The Capacity can be measured as the quantity of liquid that is released by the pump in a given time. The measurement of the Capacity can be done in 'gal/min', 'm3/HR', etc. it is completely based on the 'Size', the 'Speed' and the 'Head' of the pump.
Total Head:
The difference between the discharge pressures and the pump suction is known as total head. We can measure it in the terms of feet, head or meters.
- Suction Head:
The vertical distance from the pump centerline to the level of liquid in the vessel is called Suction Head. If the liquid level is below the pump centerline, the suction head is negative and if above the centerline, the suction head is positive.
- Discharge Head:
The discharge pressure of the pump which is expressed in meters or feet is called Discharge Head of liquid.Here:
Total Head: = Discharge head -Suction head
Power:
Power is the energy which is used by the pump in a given time period. The unit of power is Horsepower (HP). Where:1 Horsepower (HP) = 0.746 kilowatts. (KW)
Efficiency:
The pump's effectiveness in transferring the power, which is measured in the percentage and used in the energy that is added to the pumped liquid is called Efficiency. The common formula which is used for the calculation of efficiency is:Efficiency = (Output power)/(Input power) X 100%
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