I am having a hard time understanding how Back EMF works in induction (where the slip is very low, say 1%) and synchronous motors. My understanding of Back EMF is that back EMF is directly proportional to the motor's speed. As the motor spins faster, the back EMF increases, opposing the applied...
In a overpressure situation where design pressure is exceeded, typically stress analysis is done to confirm there was no yielding. In some situations, hydrotesting is done at yield stress.
What if yield stress was exceeded? ASME B31.3 doesn't specify when to replace piping after yield stress...
I’m working on a project where we have a large LNG Storage Tank at an LNG Facility. There are several submerged pumps, and each pump can be pulled out and replaced with a dummy. It also calls for a “dummy pump” to be installed for the LNG Cooldown/first-fill. The dummy pump
appears to be a...
We are installing a new firewater system as part of a plant expansion. The new firewater system will draw fire water into a sump fed from storm ponds, this sump will feed both main fire pumps and jockey pumps. The pumps are all vertical centrifugal pumps. Since these pumps will always be...
