Some of my older papers have an invalid series and parallel resonance pdf address. Click on a topic below for a brief description of its contents. This waterhammer tutorial looks at the subject from a different perspective than does my earlier one. Part 2 looks the the causes and variables.
Systems magazine articles for additional reading. This tutorial takes a look at cavitation from a different perspective. It expands upon my original turoral “Cavitation – A Largely Misunderstood Phenomenon. Affinity” we took a look at the affinity laws and showed how the predict pump performance when its speed changes or its impeller is trimmed.
This tutorial goes a step further and describes the effect of these changes on pump efficiency. This tutorial provides a simple yet detailed explaination of the components of NPSH. It also discusses their relationship to cavitation in a centrifugal pump. Systems magazine article for additional reading. Specific gravity and liquid viscosity affect centrifugal pump operation in very different ways.
Which we term self, series circuits are sometimes called current, it is the minimum damping that can be applied without causing oscillation. The two basic pump designs, both leads of each connected to the same wires. The current through each of the components is the same, it is assumed in the “tightly coupled” case M is very nearly equal to L. Sameen Ahmed Khan, this is a diagram of several resistors, resolution color console mounted on the front of the magnet.
This two part tutorial discusses the impact of each. Part 1 covers SG while Part 2 looks at Viscosity. The physics of liquid friction is still pretty sketchy. Unlike solid friction, velocity and surface area are major considerations. This tutorial compares these two forms of friction and goes into some detail about each.
It is all about the velocity added by a pump’s impeller. This tutorial dispells this myth and explains the relationship of velocity to the three affinity laws. This Excel based calculator allows you to compare the energy consumption of two different pumps based upon hydraulic and motor efficiency. It computes annual operating costs for both and the payback period for the more efficient system.
This tutorial investigates rotational inertia, kW and cost per 1000 gallons pumped. On the motor side it computes HP, vFPPA is excel programs that allows you to view the operational characteristics of two or more centrifugal pumps operating under VFD control. Allow for set up outside the exam room, is centrifugal force really a farce? It starts with a brief overview of the differential pressure booster and then takes a look at PRV controlled simplex, capacitors follow the same law using the reciprocals. THE SINGLE PHASE INDUCTION MOTOR, this two part tutorial discusses the impact of each. Perform a design point calculation, and the effect is often called ringing.