[BLDG-SIM] Active Chilled Beam Model

[Paul Erickson]

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 at ibece.net> 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

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From: Peter Simmonds 
Sent: Monday, September 11, 2006 3:47 PM
To: 'Eric Yang'
Subject: RE: [BLDG-SIM] Active Chilled Beam Model

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.
 

From: Eric Yang [mailto:Eric.Yang at smithgroup.com] 
Sent: Monday, September 11, 2006 3:40 PM
To: Peter Simmonds
Subject: RE: [BLDG-SIM] Active Chilled Beam Model


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 at ibece.net] 
Sent: Monday, September 11, 2006 6:36 PM
To: Eric Yang; BLDG-SIM at GARD.COM
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
ShermanOaks, 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 at GARD.COM [mailto:BLDG-SIM at GARD.COM] On Behalf Of Eric
Yang
Sent: Monday, September 11, 2006 2:34 PM
To: BLDG-SIM at GARD.COM
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 at smithgroup.com 
www.smithgroup.com
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