I wonder if there is any significant difference between a 4 pipe fan coil (with essentially zero fan power) and an active chilled beam. As far as I can tell, E+ normally assumes uniform zone mixing and applies the cooling or heating energy to whatever loads exist in the zone. That makes either system perform the same with possible exception of part load performance. That is certainly different for a chilled beam and a fan coil, but I don’t know how much different. (My guess is that it’s not too much)
James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of jeannieboef@xxxxxxxxx
Sent: Sunday, March 24, 2013 12:45 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Cc: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Modeling Heating w/ "Chilled" Beams
Also, you could simulate more than one chilled beam (or any equipment) connecting them to different plants, although they all represent the same piece of equipment. Just make sure the one switches off when the other switches on.
Jean
Sent from my iPhone
On 22.03.2013, at 21:44, "luke_dorna" <luke.dorna@xxxxxxxxx> wrote:
All,
I am currently modeling an office space with active chilled beams. I was using the AirTerminal:SingleDuct:ConstantVolume:CooledBeam object with baseboard radiant to pick up the heating load. However, the designers have opted to remove the baseboard radiant and go with dual mode "chilled beams" that will also do the zone heating.
Does anyone know a way to model chilled beam in heating mode, or do I need to move to the four pipe induction unit as a substitute? I don't think the induction unit accounts for the convective induction portion of the active chilled beam design.
I was also thought of using a mixed water loop to attach the beams to, I'm pretty sure putting a chiller and boiler on the same loop won't end well for me.
Thoughts?
Thanks,
Luke
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