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Brine Cooling System in EnergyPlus

asked 2018-01-08 10:52:29 -0500

kwalkerman's avatar

I am modeling a refrigerated storage facility that uses a chiller to cool a brine loop, and then has brine hyrdronic coils in each cooler to provide cooling.

In EnergyPlus, the refrigeration systems all use refrigerant as the heat transfer fluid. I am not able to use the usual chiller and hydronic cooling coils (Chiller:Electric:EIR and Coil:Cooling:Water) as the Coil:Cooling:Water is limited to a design water inlet temperature above 0 C. There may be other limitations in Chiller:Electric:EIR that I have not yet uncovered.

Is there a way to model my system as-is, or I am stuck with using the refrigeration system components and accounting for pumping energy separately?

Thank you.

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answered 2018-01-09 15:28:20 -0500

There is no direct way to model the system as-is. The chillers and chilled water supply loop support operation below 0C for charging ice storage. But the current chilled water coil models don't know how to deal with frost on the air side. You could try making a Coil:UserDefined or ZoneHVAC:ForcedAir:UserDefined that is able to operate below 0C.

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Asked: 2018-01-08 10:52:29 -0500

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Last updated: Jan 09 '18