I missed it by a few weeks! 7.5 ton Aqua Products Glycol Chiller was the size of chiller I was looking for but I ended up building my own. Using two 60k btu AC compressors and passing the refrigerant through coils inside 250 gallon glycol insulated tank I am having built. We'll see how it ends up working, but I think it should work well, and the dual compressors give me redundancy. If one goes down I could stumble along on 60k BTUs while it got fixed or replaced (at about $1k a pop they are basically throw aways). Anyone every tried this successfully?
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Actual BTU/hr
Your compressors mentioned will be working at refrigeration duty rather than AC duty and as such will be derated from the original design BTU/hr. The range the evaporator coil ends up running in can be used to roughly determine what kind of real capacity to expect from MFG. data. I would ask the compresor OEM what the compressors will do at 20F evaporator which is typical design figure. We have an older type built up system that uses a plate type heat exchanger made by Alfa Laval which ports to a good sized well. The way the condensing units are sized for this setup has proven to be tricky.
I would be interested in hearing how the coils were sized, the control arrangement, and how the system performs.
SCWarren Turner
Industrial Engineering Technician
HVACR-Electrical Systems Specialist
Moab Brewery
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Originally posted by StarcatYour compressors mentioned will be working at refrigeration duty rather than AC duty and as such will be derated from the original design BTU/hr. The range the evaporator coil ends up running in can be used to roughly determine what kind of real capacity to expect from MFG. data. I would ask the compresor OEM what the compressors will do at 20F evaporator which is typical design figure. We have an older type built up system that uses a plate type heat exchanger made by Alfa Laval which ports to a good sized well. The way the condensing units are sized for this setup has proven to be tricky.
I would be interested in hearing how the coils were sized, the control arrangement, and how the system performs.
SC
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