The last three Monday Morning Minutes have introduced the U.S. Department of Energy 2020 pump standards. The Standard looks at efficiency of pumps equally at …
New Pump Efficiency Standards Part 3: Calculating PER Values
Under the DOE’s new efficiency standards for pumps, all Pump Efficiency Rating (PER) values use a full size or maximum impeller for a given pump …
New Pump Efficiency Standard Part 2: The Pump Energy Index (PEI)
Now that the U.S. Department of Energy (DOE) has published the first ever Energy Conservation Standards for Pumps, let’s take a look at some of …
New Pump Efficiency Standards Part 1: They’re Here, Now What?
Heat pumps have them. Air conditioners have them. Even light bulbs have them. And now, for the first time in history, clean water pumps have …
Two Secrets for Bell and Gossett GPX Plate Heat Exchangers
Our recent R. L. Deppmann Monday Morning Minutes (MMM) articles have introduced a number of velocity considerations in gasketed plate heat exchangers. This week I’ll share two …
Velocity Limits in Gasketed Plate Heat Exchangers – Part 4
Plate exchangers such as the Bell and Gossett GPX series have significantly higher velocity limits than shell and tube heat exchangers, but there are still …
Minimum Velocity for Heat Exchangers with Glycol – Part 3
In part 1 and part 2 of this series, we discussed maximum and minimum heated water velocities in Bell & Gossett SU heat exchangers with standard …
Minimum Velocity in Heat Exchangers – Part 2
Shell and Tube heat exchangers are often used in institutional steam-to-water heating applications. This week’s Monday Morning Minutes post looks at minimum velocities in Bell & Gossett …
Maximum Velocities in Heat Exchangers – Part 1
Shell and Tube heat exchangers are often used in institutional steam-to-water heating applications. We recently received a call from a consulting engineer asking what the …
Heat Exchanger Fouling Factors
One of the most misunderstood items in the heat exchanger schedule is the fouling factor. This week’s Monday Morning Minutes post explores heat exchanger fouling factors …