"Chilled Water Delta T Study"

Hemand Mehta, PE, WM Group Engineers.

Poor chilled water ΔT is a chronic problem in the cooling industry. Poor ΔT reduces chiller operating capacity, requires more chillers to run at part load where the efficiency is not optimum, requires the operation of additional cooling towers and condenser water pumps, and increases energy consumption for the chilled water pumps. Typically, improving the chilled water ΔT on a system requires a relatively small investment and can result in considerable energy savings.

At present, the ΔT on the campus central chilled water system is less than ideal. The purpose of this study is to determine the potential energy cost savings available of the ΔT were improved.

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