[Equest-users] QRE: Keyword Expression question - set boiler type

Jones, Christopher Christopher.r.Jones at wsp.com
Wed Apr 18 14:35:40 PDT 2018


Of course, you can take the long way around but you are limited to the command line version of DOE2.2:
##IF #[ BLR-EFF[] gt 0.89 ]
"Boiler-Offices" = BOILER
   TYPE             = HW-CONDENSING
   HEAT-INPUT-RATIO = {1 / #PA("HTG-EFF-BLR")}
   HIR-FPLR         = "CondBlr-HIR-fPLR&HWR"
   HW-LOOP          = "Baseboard-Loop"
   HW-PUMP          = "DEFAULT-HW-PUMP"
   HW-HEAD          = 0.01
   HW-STATIC-HEAD   = 0
   ..
##ELSE
"Boiler-Offices" = BOILER
   TYPE             = HW-BOILER
   HEAT-INPUT-RATIO = {1 / #PA("HTG-EFF-BLR")}
   HIR-FPLR         = "Atmospheric-Blr-HIR-fPLR"
   HW-LOOP          = "Baseboard-Loop"
   HW-PUMP          = "DEFAULT-HW-PUMP"
   HW-HEAD          = 0.01
   HW-STATIC-HEAD   = 0
   ..
##ENDIF

You have to define a macro variable:
##SET1 BLR-EFF 0.90 ..
Above somewhere.

You can do this in eQuest – by editing the .inp file then opening the eQuest project but eQuest immediately expands all macro expressions and strips them out of the .inp file.


Christopher R. Jones, P.Eng.
Technical Specialist
Sustainability & Energy

[cid:image001.png at 01D3D73B.A9A288C0]
T +1 416-644-0252

2300 Yonge Street, Suite 2300
Toronto, ON M4P 1E4 Canada

wsp.com


Please consider the environment before printing...


From: Nicholas Caton [mailto:Nicholas.Caton at schneider-electric.com]
Sent: Wednesday, April 18, 2018 5:16 PM
To: Jones, Christopher <Christopher.r.Jones at wsp.com>
Cc: equest-users at onebuilding.org
Subject: RE: Keyword Expression question - set boiler type

I think boiler / chiller TYPE, like airside system TYPE, is something you can technically “expressionize” via the eQuest interface, but you’ll find cirtical issues in simulation.

For primary equipment on hydronic loops, I much prefer to define for example

  *   +1 “dummy” primary loop, of an appropriate type (hot water in this case).  Give that a minor process load to avoid throwing errors in simulation
  *   Fully define your HW-BOILER and your “other” boiler(s) as distinct boilers in the same model, but place them on the “dummy” loop if they shouldn’t be active.
  *   With parametric run inputs, or with expressions, you can then “swap” which boiler(s) are on your actual primary loop by swapping the loop assignments.

Another working approach I’ve heard of is to define all boiler options of interest on the same (actual) loop, but use expressions to toggle capacity down to zero (or near zero) vs. actual sizing, to effectively turn ON only the boilers that should be active.  A little less work compared to a “dummy” loop approach, but doesn’t afford the same “spatial” sense of what boilers are active for a  given run.

~Nick

[cid:image002.png at 01D3D73B.A9A288C0]
Nick Caton, P.E., BEMP
  Senior Energy Engineer
  Regional Energy Engineering Manager
  Energy and Sustainability Services
  Schneider Electric

D  913.564.6361
M  785.410.3317
F  913.564.6380
E  nicholas.caton at schneider-electric.com<mailto:nicholas.caton at schneider-electric.com>

15200 Santa Fe Trail Drive
Suite 204
Lenexa, KS 66219
United States

[cid:image003.png at 01D3D73B.A9A288C0]



From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Jones, Christopher via Equest-users
Sent: Wednesday, April 18, 2018 4:27 AM
To: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: [Equest-users] Keyword Expression question - set boiler type

I am struggling to determine how to set a BOILER TYPE using a keyword expression.

If( x>Y) then
                TYPE = HW-BOILER
Endif



Christopher R. Jones, P.Eng.
Technical Specialist
Sustainability & Energy

[cid:image001.png at 01D3D73B.A9A288C0]
T +1 416-644-0252

2300 Yonge Street, Suite 2300
Toronto, ON M4P 1E4 Canada
wsp.com


Please consider the environment before printing...



________________________________


NOTICE: This communication and any attachments ("this message") may contain information which is privileged, confidential, proprietary or otherwise subject to restricted disclosure under applicable law. This message is for the sole use of the intended recipient(s). Any unauthorized use, disclosure, viewing, copying, alteration, dissemination or distribution of, or reliance on, this message is strictly prohibited. If you have received this message in error, or you are not an authorized or intended recipient, please notify the sender immediately by replying to this message, delete this message and all copies from your e-mail system and destroy any printed copies. You are receiving this communication because you are listed as a current WSP contact. Should you have any questions regarding WSP's electronic communications policy, please consult our Anti-Spam Commitment at www.wsp.com/casl<http://www.wsp.com/casl>. For any concern or if you believe you should not be receiving this message, please forward this message to caslcompliance at wsp.com<mailto:caslcompliance at wsp.com> so that we can promptly address your request. Note that not all messages sent by WSP qualify as commercial electronic messages.

AVIS : Ce message, incluant tout fichier l'accompagnant (« le message »), peut contenir des renseignements ou de l'information privilégiés, confidentiels, propriétaires ou à divulgation restreinte en vertu de la loi. Ce message est destiné à l'usage exclusif du/des destinataire(s) voulu(s). Toute utilisation non permise, divulgation, lecture, reproduction, modification, diffusion ou distribution est interdite. Si vous avez reçu ce message par erreur, ou que vous n'êtes pas un destinataire autorisé ou voulu, veuillez en aviser l'expéditeur immédiatement et détruire le message et toute copie électronique ou imprimée. Vous recevez cette communication car vous faites partie des contacts de WSP. Si vous avez des questions concernant la politique de communications électroniques de WSP, veuillez consulter notre Engagement anti-pourriel au www.wsp.com/lcap<http://www.wsp.com/lcap>. Pour toute question ou si vous croyez que vous ne devriez pas recevoir ce message, prière de le transférer au conformitelcap at wsp.com<mailto:conformitelcap at wsp.com> afin que nous puissions rapidement traiter votre demande. Notez que ce ne sont pas tous les messages transmis par WSP qui constituent des messages electroniques commerciaux.



-LAEmHhHzdJzBlTWfa4Hgs7pbKl
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
______________________________________________________________________
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20180418/fa6840ab/attachment-0002.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 25844 bytes
Desc: image001.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20180418/fa6840ab/attachment-0012.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.png
Type: image/png
Size: 255 bytes
Desc: image002.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20180418/fa6840ab/attachment-0013.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image003.png
Type: image/png
Size: 8477 bytes
Desc: image003.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20180418/fa6840ab/attachment-0014.png>


More information about the Equest-users mailing list