Hi everyone,

Has any else run into an issue where the entering condenser water temperature of a chiller is dramatically different than the CW supply temperature leaving the towers? I'm modeling a variable speed pump retrofit for CW pumps where I'm seeing reasonable savings on the pumping and heat rejection end uses, but negative chiller savings that appear to be a result of increased ECT between base and proposed cases. I'm using a standard water-cooled electric hermetic centrifugal chiller with eQUEST default performance curves. See example below and hourly report files attached. Let me know if any other inputs from the model would be useful.

Thanks in advance for your time.
Joe

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Joe Bliss

Designer

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