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 ...
There are two types of NPSH; NPSHRis the minimum pressure required to prevent cavitation, which can ruin or shorten the life your pump. This specification is provided by the manufacturer. So the type of NPSH you may be asked to calculate is NPSHA, or the absolute pressure at the pump's ...
Divide the diameter of each pipe by two to get the radius for pipe one and pipe two. Continuing the example, you have radii of 2.5 inches and 4 inches for pipe one and pipe two, respectively. Calculate the cross-sectional area for both pipe one and two by multiplying the square of the...
A result in only three steps: the consumption values of a classic constant pump and the Baumüller servo-hydraulic pump are shown clearly next to each other in the new online energy calculator Depending on the application, changing from hydraulic to servo-hydraulic technology for a hydraulic machin...
To evaluate the performance of an existing compressor, the objective is to calculate the compressor efficiency (η) and power requirement. Known and measured properties are: a.Standard condition gas volume flow rate (qS) or gas mass rate () ...
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It’s simple to calculate your gas mileage if you desire. Simply reset the odometer every time you fill up. Then, when you arrive at the gas pump, take note of how many miles you’ve driven. Divide this number by how many gallons your car took before it was full. ...
Qualcomm delivering Snapdragon X efficiency-optimized processors that can compete with Apple’s M-series Apple Silicon processors, has yet to yield convertible laptops with screens like those on my last two HPs that I can rotate all the way around to turn the computer into a somewhat hefty table...
For those always on the move, the hand pump is your little buddy. It’s small and easy to carry, perfect for emergencies. Just know that it takes a bit of muscle to get your tires fully pumped. Stand Pumps If you’re into off-road biking, the stand pump is your pal. It’s good...
These high-efficiency pumps feature rugged construction that includes the strongest neodymium magnets. With sealless design, DB Series pumps deliver reliable operations, with hours of run-dry capability.The DB Series offers a dependable mag drive centrifugal pump for diverse applications:Anodizing Aquarium...