r22 to chilled water

[jonoetting]

something I brought up to the property manager in a 10 story building. is it possible to remove a dx system expansion valve and run chilled water through the coil? each floor has its own dx unit trane m/n scwdo724omo14007531w2102, for a total of 10 compressors would the cooling capacity be the same?

[Brimm]

I have seen sthomthing like that done before were a r-12 stetem on a theater was switched to a chill water the txv's and distribuer tubes were puled the cooling cap just about the same but this was a 120 ton system thay olny needed about 75 tons. it should be able to be done

[btuhack]

Coil manufacturers have programs to model coil performance. I think you'd learn alot by giving it a try but disappointed/surprised with the results in the end.

PLUS-There are many other elements of a project like this to consider- down time, redundancy, efficiency, tonnage, chiller, large insulated s/r lines, controls, etc.

Why do you ask the question?

[flange]

there used to be a company that offered retrofit kits just for this type of changeout. it involved cutting out the dx header coil and installing two new headers sized appropriately. havent seen them in years, wonder why?

[jonoetting]

trying to throw some energy saving ideas out there. instead of having 10, 50 ton compressors starting and stopping all day it seems more efficent to have two 250 ton chillers running. its all comfort cooling no equipment

[absrbrtek]

I tyhink you'll find you get more capacity out of the coil with cw over dx. Its going to be a matter of how it is reheadered and flows. I went over this years ago with a coil manufacturer. JMHO