Parallel Pumping Sketch
Parallel Pumping Sketch

Parallel Pumping: 2-Position Control Valves on Multiple Cooling Towers (Part 5)

Norm Hall, R.L. Deppmann and Chad Edmondson, J. M. PleasantsMonday Morning Minutes, Commissioning and Balance, Cooling Towers, Pumps, Hydronic System Design, Selection and Specification, Cooling Towers, Piping and Pumps, Parallel Pumping, Parallel Pumping

Over the last few weeks the Monday Morning Minutes posts have looked at pumping issues with multiple condensers and pumps. One of our most-received questions …

Small Drawing of Header Supply and Return
Small Drawing of Header Supply and Return

Parallel Pumping with Unequal Condensers (Part 4)

Norm Hall, R.L. Deppmann and Chad Edmondson, J. M. PleasantsHydronic System Design, Selection and Specification, Cooling Towers, Piping and Pumps, Parallel Pumping, Parallel Pumping, Monday Morning Minutes, Commissioning and Balance, Cooling Towers, Pumps

Over the last few weeks our Monday Morning Minutes posts have looked at pumping issues with parallel, equal-sized condensers and pumps. This week we will look …

Metraflex LPD Y strainer
Metraflex LPD Y strainer

Parallel Pumping in Condenser Applications: Automatic Differential Pressure Control (Part 3)

Norm Hall, R.L. Deppmann and Chad Edmondson, J. M. PleasantsSelection and Specification, Cooling Towers, Piping and Pumps, Parallel Pumping, Parallel Pumping, Commissioning and Balance, Monday Morning Minutes, Cooling Towers, Pumps, Hydronic System Design

Chilled water condensers are normally operated as constant-flow devices and the pumps serving them are constant-speed. Why would you ever use a variable-speed drive for …

Griswold Wafer
Griswold Wafer

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

Norm Hall, R.L. Deppmann and Chad Edmondson, J. M. PleasantsPiping and Pumps, Parallel Pumping, Parallel Pumping, Monday Morning Minutes, Commissioning and Balance, Cooling Towers, Pumps, Hydronic System Design, Selection and Specification, Cooling Towers

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 …

Parallel Curve - Featured
Parallel Curve - Featured

Parallel Pumping in Condenser Applications (Part 1)

Norm Hall, R.L. Deppmann and Chad Edmondson, J. M. PleasantsMonday Morning Minutes, Parallel Pumping, Pumps, Pumps, Hydronic System Design, Selection and Specification, Cooling Towers, Piping and Pumps, Cooling, Parallel Pumping

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 …