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Re: [EnergyPlus_Support] Chilled Beams need a separate water control loop





I would go with the two chiller approach, but modify the performance curves so that they better reflect the actual conditions.



From: "James V Dirkes II, PE" <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Thu, September 30, 2010 1:56:43 PM
Subject: RE: [EnergyPlus_Support] Chilled Beams need a separate water control loop

 

Thanks, Brent.

 

Two chillers changes part load relationships a lot.

Lower water temp to the chilled beams probably affects their performance, too, but I suspect the bigger impact will be on the chiller performance.

 

I think Iâ??ll go with the one chiller approach.

 

This might be a nice item to add to the development list, if itâ??s not already on it!

 

The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653

 

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Griffith, Brent
Sent: Thursday, September 30, 2010 12:36 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: [EnergyPlus_Support] Chilled Beams need a separate water control loop

 

 

In E+, you either end up needing to use two separate chilled water loops (and two chillers), or ignore the higher temp water for the beams and use one supply temperature.   

 

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of jvd2pe
Sent: Thursday, September 30, 2010 7:45 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Chilled Beams need a separate water control loop

 

 

Dear Forum,

In a typical chilled water system using CHILLED BEAMS, you need:
* a chilled water loop for air handler coils at ~45F / 7C
* another chilled water loop for the chilled beams at ~60F / 15C
* both served by single chiller

Does anyone have suggestions about how to set this up in E+?

Thanks in advance!



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