Water Side Economizers Part 3: Cooling Tower Temperatures

Norm HallWaterside Economizer, Heat Exchangers, ASHRAE 90.1, Hydronic System Design, Cooling Towers, Codes and Standards, Energy and Water Saving, Monday Morning Minutes, Chilled Water, Waterside Economizer

Many northern state energy codes require economizers for chilled water systems. Waterside economizers per ASHRAE 90.1-2013 and 2010 shall provide up to 100% of the …

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

Parallel Pumping with Unequal Condensers (Part 4)

RL DeppmannHydronic 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)

RL DeppmannPiping and Pumps, Parallel Pumping, Parallel Pumping, Commissioning and Balance, Monday Morning Minutes, Cooling Towers, Pumps, Hydronic System Design, Selection and Specification, Cooling Towers

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)

RL DeppmannParallel Pumping, Monday Morning Minutes, Commissioning and Balance, Cooling Towers, Pumps, Hydronic System Design, Selection and Specification, Cooling Towers, Piping and Pumps, Parallel Pumping

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 …