R. L. Deppmann News and Information

Parallel Pumps in Condenser Applications: Limiting the Flow Rate (Part 2)

In part 1 of this series we offered an example condenser water pumping system. The design of this example is 800 GPM per condenser for

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Griswold wafer

Parallel Pumping in Condenser Applications (Part 1)

Applying a single constant-speed pump for each condenser in a chilled water application is a normal design for the HVAC engineer. The chiller manufacturers suggest

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parallel curve - featured

Bell & Gossett Part Load Efficiency Value (Part 5): BTUH Load Output vs. Percent of Flow Tolerance

The last four segments of the R. L. Deppmann Monday Morning Minutes introduced the valuable PLEV tool from Bell and Gossett. The part load efficiency

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How to Use the Part Load Efficiency Value

Condensate Traps on Dri-Steem Dispersion Tubes

Some installations of Dri-Steem dispersion tubes require a condensate trap or P-trap. Condensate traps help remove as much of the condensate from the steam as possible

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condensate traps on Dri-Steem dispersion tubes

Bell & Gossett Part Load Efficiency Value Part 4: End-of-Curve Selections

When looking at Bell and Gossett pump selections, we often find higher part load efficiency (PLEV) pump choices are to the right of the BEP, or best

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control curve of 30% of design head and variable speed

Bell & Gossett Part Load Efficiency Value Part 3: HVAC Pump Selection

In the last two Monday Morning Minutes, we introduced the PLEV, or Part Load Efficiency Value, from Bell and Gossett. When we use part load

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How to Use the Part Load Efficiency Value

HVAC & R: 4 Fun Facts for 4th of July

Happy 4th of July—the celebration of the American Independence Day. Today’s Monday Morning Minutes post shares four fun facts about the HVAC and R from our early years

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Franklin Stove - early U.S. HVAC

Laars Parts ID Now has Photos

Laars Heating Systems announces the inclusion of parts photos in the Laars Parts ID portal! The Laars Parts ID portal lists all parts used at

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16-9 Parts ID with Photos

Bell and Gossett Part Load Efficiency Value Part 2: How to use PLEV

In the last Monday Morning Minutes post, we introduced the PLEV, or Part Load Efficiency Value from Bell and Gossett. This week we look at some

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How to Use the Part Load Efficiency Value

Bell and Gossett Part Load Efficiency Value

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

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pump
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