[Bldg-sim] Bldg-sim Digest, Vol 19, Issue 20

Shariq_Ali at URSCorp.com Shariq_Ali at URSCorp.com
Tue Jun 23 15:36:26 PDT 2009



Mike,

You would keep your CUH's for heating, and you would only zero-out your
heating coils, not cooling coils (in your design case only). You would keep
both coils operating in your baseline case. Thinking about it further I
would not create a VAV heating plant for your design (I'm not sure if Trace
automatically creates one or if your require to create it in Trace). I
would just assign the heating systems to the CUH heating plant. In Trace,
your fans will cycle when occupancy is at 5% or above, realistically, if
your occupancy is never at 5% your fans will not turn on due to occupancy.
However they will cycle with load - which is how you want the system to
operate anyway. And for a warehouse I'm guessing there isn't much going on
in most of the place anyway, so setup your thermal zones / rooms so you
have your storage area separate from the loading dock and offices and you
should set yourself up pretty well.

Be sure to use good insulation on the walls and roof, 90.1 calls out for
continuous insulation, for a warehouse I'm assuming your going to be using
steel stud construction, I'd double check the arch's U, and SC values
against what the minimum are in the arch section of 90.1. Another thing -
if your lights are all on a time clock or occupancy sensors, you can take a
10% credit in lighting power (I've found this little credit is something
that is often overlooked, it's the last table in the standard).

Good luck.
-Shariq



                                                                              
 This e-mail and any attachments contain URS Corporation confidential         
 information that may be proprietary or privileged. If you receive this       
 message in error or are not the intended recipient, you should not retain,   
 distribute, disclose or use any of this information and you should destroy   
 the e-mail and any attachments or copies.                                    
                                                                              







                                                                           
             Mike Kennedy                                                  
             <consumer at madronagrove.                                       
             com>                                                       To 
                                             Shariq_Ali at URSCorp.com,       
             06/23/2009 06:22 PM             bldg-sim at lists.onebuilding.or 
                                             g                             
                                                                        cc 
                                                                           
                                                                   Subject 
                                             Re: [Bldg-sim] Bldg-sim       
                                             Digest, Vol 19, Issue 20      
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           




Shariq Ali,

Can you really say you are modeling cooling in the base and proposed cases
if you set the cooling capacity to zero?

Mike

At 12:31 PM 6/23/2009, Shariq_Ali at URSCorp.com wrote:

      Robby - the fans must cycle with occupancy, and then when the space
      is not occupied the must cycle with load. They can not cycle with
      load only. For Mike Kennedy's system he would need to model the
      baseline with VAV heating and cooling. And also model the same system
      in the proposed, however you could set the heating coil capacities to
      zero, not create a heating plant, or not assign any systems to the
      heating plant for the VAV system. (This is if you are using Trace
      700).

      Good luck.


      -Shariq Ali
      []

      This e-mail and any attachments contain URS Corporation confidential
      information that may be proprietary or privileged. If you receive
      this message in error or are not the intended recipient, you should
      not retain, distribute, disclose or use any of this information and
      you should destroy the e-mail and any attachments or copies.




      _______________________________________________
      Bldg-sim mailing list
      http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org
      To unsubscribe from this mailing list send  a blank message to
      BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20090623/17de4c8e/attachment-0002.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: C5393595.jpg
Type: image/jpeg
Size: 59935 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20090623/17de4c8e/attachment-0004.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: graycol.gif
Type: image/gif
Size: 105 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20090623/17de4c8e/attachment-0006.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: pic23811.gif
Type: image/gif
Size: 1255 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20090623/17de4c8e/attachment-0007.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ecblank.gif
Type: image/gif
Size: 45 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20090623/17de4c8e/attachment-0008.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: C8003787.jpg
Type: image/jpeg
Size: 59935 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20090623/17de4c8e/attachment-0005.jpg>


More information about the Bldg-sim mailing list