Theoretical chiller analysis- impact of ECWT

[jkace]

Hi,

I'm looking to quantify the cost savings of a decreased ECWT in a standard compression chiller, in hopes of showing the importance of an effective chilling tower. I'd like to put together an example of the effect on efficiency of a 5 degree increase in ECWT, say 90 degrees versus 85, and translate that into cost savings. Does anyone know of a reference which relates ECWT to COP or efficiency in kW/Ton, either as a graph or table?

Thank you very much for any help.

 

[imok2]

THIS MAY HELP:

http://www.efficiencyvermont.com/pa...ller Efficiency Optimization at Part Load.pdf

 

[jkace]

That is very close to what I need. I'm actually looking for the difference when the tower is working inefficiently, so a comparison that relates to higher temperatures (<85 degrees F). Thanks for the reference, its already getting me on the right path.

 

[marcoh]

If you have access to energy simulation software and chiller data it should be relatively straight forward to compare the two scenarios.