Some of my older papers have an invalid email address. Click on the curve of binding energy pdf 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. 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. Systems magazine article for additional information.
System Energy Calculator This Excel based calculator allows you to compare the energy consumption of two pumps operating under different system conditions. The example included is for a pump that is pumping 600 GPM through 600 feet of 6″ and 8″ steel pipe. Systems article for information on this calculator. In the mid eighties, Igor Karassik wrote a three part series that described the problems associated with off BEP operation. Part 1 explores radial thrust and temperature rise while Part 2 looks at internal recirculation and air binding. Part 3 discusses discharge recirculation and discharge bypasses.