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Recent Posts
- What is the Purpose of Minimum Flow?
- Hydrodynamics of Pumps (2011 edition) – A Book Review
- Diffuser versus volute
- Pump Handbook Fourth Edition – A Book Review
- Korea – A Year In Review
- Beyond expectation
- Downsizing the pool pump
- Horizontal or Vertical?
- My first WEFTEC
- Hypermiling
- Specific Speed – Does it Matter?
- NPSH clarification
- Multi-stage pump in-line (tandem) versus opposed impeller arrangements
- The ideal pump
- Storm drain – what happens when the power goes out
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Category Archives: Pumps
What is the Purpose of Minimum Flow?
Over the years use of the term “minimum flow” has evolved. Decades ago industrial centrifugal pump manufacturers quoted a single, relatively low value for minimum flow intended to prevent users from running their pumps to destruction. The term “minimum flow” … Continue reading
Hydrodynamics of Pumps (2011 edition) – A Book Review
Hydrodynamics of Pumps by Christopher E. Brennen was first published in 1994. Aside from my long-time professional acquaintance with the author, what caught my attention in this book are the various technical passages related to rocket propulsion turbomachines, including the Space … Continue reading
Posted in book reviews, Pumps
Tagged book review, Brennen, cavitation, Christopher E. Brennen, hydrodynamics, Hydrodynamics of Pumps, pump, unsteady flows
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Diffuser versus volute
The stator section of a centrifugal pump, after flow exits the impeller, is usually either a ‘diffuser’ or a ‘volute’. The purpose of each of these two stator types is to efficiently diffuse velocity energy into pressure. Diffusers are characterized … Continue reading
Posted in Pumps
Tagged centrifugal pump, collector, diffuser, pump, radial thrust, stator, vaned diffuser, volute
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Pump Handbook Fourth Edition – A Book Review
Years ago I owned a copy of Pump Handbook 1st Edition, by Karassik, Krutzsch, Fraser, and Messina. While it was a book to have on the shelf, it was not my primary source of pump engineering reference material. I obtained … Continue reading
Posted in book reviews, Pumps
Tagged book review, mechanical engineering books, pump, pump handbook 4th edition
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Korea – A Year In Review
This year I’ve visited South Korea (Korea) five times. The destination has always been Changwon City so most of my experience and observations of Korea relate to that locale. Any Westerner’s experience with Korea inevitably starts with the food. Yes, … Continue reading
Posted in Pumps
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Downsizing the pool pump
About four weeks ago our swimming pool pump quit. I don’t know the exact date, but our pool guy, Randy, left us a note. We didn’t see the note, so a week later on his weekly visit I was home … Continue reading
Posted in Pumps
Tagged annual energy savings, power demand, pump downsizing, pump failure, swimming pool pump, variable speed
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