How to calculate motor efficiency for variable-speed centrifugal pumps: knowing the efficiencies of the pump, VSD, and motor will enable the engineer to calculate the kW input for a pump, from minimum to maximum flow and head conditions for that pump. Here, the author goes through that ...
The pump flow rate calculation is an essential aspect of many engineering projects. Accurate calculations ensure the efficiency, reliability, and effectiveness of your systems — from simple water pumps to complex industrial processes. The basic formula to calculate the pump flow rate is: Flow Rate ...
There are a lot of pump selection criteria that go into maximizing centrifugal pump efficiency and ensuring that you have the proper setup for your site. The size of the pump itself. The sort of liquid you need to move. That liquid’s viscosity, acidity, and percentage of solids. The impe...
Head is the height to which a centrifugal pump can raise water straight up. Water creates pressure or resistance, at predictable rates, so we can calculate pump head as the differential pressure that a pump has to overcome in order to raise the water. Common units are feet of head and pou...
To calculate the equivalent resistance divide the battery’s full charge voltage by the current draw you measured above the result is the number of ohms of resistance you need to simulate your motors. Make sure the resistor you use can handle the load otherwise it will overheat and burn up....
SST k-蠅 turbulence model was adopted to calculate the 3D turbulence flow in the whole flow passage of the pump.The impeller and the back-blade domain were set as rotating domains with the same rotational speed in the model test.The front and back shroud were set as rotating walls with ...
pressure and quality so that the components that use the air can be powered in the correct manner. A compressed air system that is not designed properly will increase the costs of energy, lower production efficiency and also lead to equipment failure. Most compressed air systems consist of a ...
design. The actual efficiency of any one motor must be within a tolerance band based on a +/- 20% variation in motor losses. The nominal efficiency is often used to calculate energy consumption. Nominal efficiency mist be included on polyphase induction motor name-plates when required by NEMA...
To calculate VFD energy savings(Energy required by motor at full load, synchronous speed)minus (energy required by load at a specific operating point)minus (drive losses at that same operating point)minus (harmonic losses at that same operating point)Take the result (for a given operating point...
Horsepower is a unit of measurement that calculates power. It was originally coined by a Scottish engineer to compare the power of steam engines with the power of horses. This article will show you how to calculate the horsepower of your...