Hi everyone,
We are trying to model a refrigerated warehouse in OpenStudio/EnergyPlus. The building includes office spaces and walk-in coolers. The refrigeration system serves several walk-in coolers and an ice thermal storage tank for the HVAC system. Is there any way I can connect the refrigeration system and the HVAC system in EnergyPlus?
Thanks in advance for your help.
Are you using the ZoneHVAC:RefrigerationChillerSet to model this? This should be doable if that's the case.
If you're using a Refrigeration:CompressorRack to model the compressors you may be able to use the Refrigeration:TransferLoadList to connect the thermal storage to the walk-ins but I have not personally attempted this.
I would recommend using the ZoneHVAC:RefrigerationChillerSet approach because EnergyPlus doesn't really account for the part-load performance of Refrigeration:CompressorRack's to begin with :( Compressor rack performance is solely dependant on the discharge and suction temperatures.
Thanks for your answer. I am using the ZoneHVAC:RefrigerationChillerSet, but I'm still confused about how to transfer the energy.
The ZoneHVAC:RefrigerationChillerSet exchange energy directly with a zone, while an ice thermal storage is typically connected to input and output nodes (plant loop). I am new to EnergyPlus so I'm not sure how to connect the two system.
After looking into this some more it appears the Refrigeration:TransferLoadList and Refrigeration:SecondarySystem objects don't support the HeatExchanger:FluidToFluid object which is the only way I can imagine a PlantLoop can be connected to a refrigeration system. I'm pretty sure thermal storage systems have to be connected to PlantLoops. Given this, I guess EnergyPlus doesn't directy support the system setup you're looking for.
Maybe you can approximate it using a PlanLoop with a custom operating fluid and some type of terminal unit with an evaporator coil?
Asked: 2015-04-21 21:51:29 -0600
Seen: 373 times
Last updated: Apr 22 '15
