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DAVID W. SPITZER'S E-ZINE

TECHNICAL AND MARKETING SERVICES
FOR INSTRUMENTATION SUPPLIERS AND END-USERS

This issue sponsored by Spitzer and Boyes, LLC

March 2019

Applying Paddlewheel Flowmeters: Insertion Flowmeters

All of the insertion-style units rely on the point-velocity theory for operation. That is, they sense velocity at a single point. Depending on the flow profile that velocity is either very close to the average velocity in the line or it isn't. If it is close, the flowmeter is relatively accurate. If it is not, the meter is relatively inaccurate, depending on how far away from the average velocity point the paddle is sitting. click for more...

Using Principles to Calculate Boiler Efficiency

Previously discussed was the use of tables to determine boiler combustion efficiency. This approach is limited to a given fuel and is based on the excess oxygen and temperature rise above ambient conditions. Many factors can reduce the accuracy of the tables and often render them useless, so first, principles may have to be applied to calculate boiler efficiency. click for more...

Boiler Measurement Problems

What is wrong (or not) with the following actual boiler measurements? click for more...

 

ABOUT SPITZER AND BOYES, LLC

In addition to over 35 years of experience as an instrument user, consultant, and expert witness, David W Spitzer has written over 10 books and 250 articles about flow measurement, level measurement, instrumentation, and process control. David (with Walt Boyes) is the author of seven Consumer Guides to various industrial flow and level technologies. David teaches his flow measurement seminars in both English and Portuguese.

Spitzer and Boyes, LLC provides engineering, technical writing, training seminars, strategic marketing consulting, distribution consulting, and expert witness services worldwide, and can be contacted at +1.845.623.1830 or www.spitzerandboyes.com.

 

ISSN 1538-5280
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