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Eric,
As Peter stated, an induction unit can have a dedicated system supply source (for Trace it is OA; for eQUEST/DOE-2 you specify source...OA or rom a chosen AHU). The same is true with the fan coil unit.
For DOE-2.2/eQUEST specifically, there are a few of snags that one runs into. One, the induction ratio doesn't really matter...play around and you'll see. Two, DOE-2 doesn't seem to account for the fan energy used to pull off the CFM that goes to the beams...I'd love for someone to prove I'm wrong. Three, I've had difficulties with loop temperatures and delta T for the loops...i.e. DOE-2 didn't seem to like the higher water temps going to the IU/FCU. I'd like to hear feedback if someone else got around this.
Trace had some similar drawbacks...I'll work on recalling them.
Paul
>>> "Peter Simmonds" <peter.simmonds@xxxxxxxxx> 9/12/2006 8:48 am >>>
Peter Simmonds Ph.D.
Associate
IBE Consulting Engineers
14130 Riverside Drive Suite 201
Sherman Oaks, CA 91423
p: (818) 377-8220
f: (818) 377-8230
m: (818) 219-1284
IDEAS FOR THE BUILT ENVIRONMENT
This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure, or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.
OK so you are talking about an active beam and not a static beam, right. Then you need an outside air supply to be incorprated into the conditioning system, so I guess the induction unit will suffice, just check the minmum turndown ratio and check the induction rate to match the profile of the active beam.
Peter Simmonds Ph.D.
Associate
IBE Consulting Engineers
14130 Riverside Drive Suite 201
Sherman Oaks, CA 91423
p: (818) 377-8220
f: (818) 377-8230
m: (818) 219-1284
IDEAS FOR THE BUILT ENVIRONMENT
This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure, or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.
Thanks for your inputs. How about the air which is induced into the beams? For example, I supply only 105 CFM per beam, but I will have around 300 CFM total supply air.
Eric
From: Peter Simmonds [mailto:peter.simmonds@xxxxxxxxx]
Sent: Monday, September 11, 2006 6:36 PM
To: Eric Yang; BLDG-SIM@xxxxxxxx
Subject: RE: [BLDG-SIM] Active Chilled Beam Model
Very simple. Model the chilled beam as a fan coil for cooling only and remove the associated fan power.
Peter Simmonds Ph.D.
Associate
IBE Consulting Engineers
14130 Riverside Drive Suite 201
Sherman Oaks, CA 91423
p: (818) 377-8220
f: (818) 377-8230
m: (818) 219-1284
IDEAS FOR THE BUILT ENVIRONMENT
This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure, or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.
From: BLDG-SIM@xxxxxxxx [mailto:BLDG-SIM@xxxxxxxx] On Behalf Of Eric Yang
Sent: Monday, September 11, 2006 2:34 PM
To: BLDG-SIM@xxxxxxxx
Subject: [BLDG-SIM] Active Chilled Beam Model
Greetings
I am seeking for any suggestions or input on the model of active chilled beam system. In my previous Trace model, it can not handle it very well by induction system. I am very curious to get inputs and helps from other folks. Thanks in advance.
Eric
Eric Yang
Mechanical Engineer, LEED.A.P.
SmithGroup
1850 K Street, NW, Suite 250
Washington, DC 20006
t 202.974.4555 (direct)
f. 202.974.4500
eric.yang@xxxxxxxxxxxxxx
www.smithgroup.com
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