[Equest-users] Using C-ACTIVITY-DESC in keyword expressions to assign LPD, equipment loads etc.

Bishop, Bill bbishop at pathfinder-ea.com
Mon Jul 28 09:19:04 PDT 2014


The space description "C-ACTIVITY-DESC", as shown below, can be referenced by keyword expressions.

[cid:image003.png at 01CFAA5E.1E3325F0]

For example, to assign LPD by space type, follow these steps:

1.      As always, save your project and work from a new copy whenever trying something that may be hard or impossible to undo if you pull an "oops".

2.      Enter consistent space descriptions based on the first four characters of the description. ("Office - open" and "Office - Enclosed" will both be treated as "offi" because the BDL expression mechanism uses four characters.) This is the most time-consuming step.

3.      Enter the following string as a User-Defined Default Expression for LIGHTING-W/AREA:

if(#RV(#L("LIGHTING-SCHEDUL",0))!=0) then unused

else switch(#L("C-ACTIVITY-DESC"))

case "acti": 0.8

case "clas": 1.4

case "offi": 1.0

default: 1.2

endswitch

endif



(Add or replace case statements, and the default value as applicable to your project's space types. I kept the DOE-2 default expression in the example above, and then added the switch statement.)

[cid:image008.png at 01CFAA5E.1E3325F0]



This appears in the input file as the following:

SET-DEFAULT FOR SPACE

   LIGHTING-W/AREA  = (

{if(#RV(#L("LIGHTING-SCHEDUL",0))!=0) then unused

else switch(#L("C-ACTIVITY-DESC"))

case "acti": 0.8

case "clas": 1.4

case "offi": 1.0

default: 1.2

endswitch

endif

} )

   ..



4.      "Restore default" to the LIGHTING-W/AREA values of each space to apply the values from the keyword expression. You can do this manually by right-clicking in the field for each space or by deleting lines in the input file. I use the NoteTab Light text editor and the regular expression

"^   LIGHTING-W/AREA.*$" to delete all space LPD assignments (being careful not to delete the keyword expression just entered above), as follows:



[cid:image017.png at 01CFAA5E.1E3325F0]

5.      Repeat these steps as desired for other keywords, such as EQUIPMENT-W/AREA, LIGHTING-SCHEDULE, AREA/PERSON etc. Be creative!

6.      Do a happy dance.

H/T to Jeremy McClanathan for helping me with this previously.

Regards,
Bill

From: Greenberg, Ari [mailto:agreenberg at CANNONDESIGN.COM]
Sent: Monday, July 28, 2014 11:21 AM
To: Bishop, Bill; Singhal, Harshul; Jeff Haberl; wafik adbelkarim
Cc: equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] space renaming

Hi Bill,

Using a keyword expression to automatically assign LPD by space type sounds like a neat trick that would save some time.  Would you mind sharing a little more about how to set this up?

Thanks,
Ari

Ari Greenberg, LEED AP BD+C

[cid:image001.png at 01CEFD8A.E416B290]
100 Cambridge St., Suite 1400
Boston, Massachusetts 02114
T 617.517.6224 * M 857.231.1076
cannondesign.com

[http://thinkbeforeprinting.org/struct/signature-1.gif]

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Bishop, Bill
Sent: Monday, July 28, 2014 11:07 AM
To: Singhal, Harshul; Jeff Haberl; wafik adbelkarim
Cc: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: Re: [Equest-users] space renaming

You can easily justify over 100 zones on larger projects (say 50,000 ft2 or more), especially if they are not multi-story with identical floor plans. Most of the modeling I do uses Appendix G methodology, where lighting power density is assigned by space type. I use a keyword expression to assign LPD based on the space type, as assigned via the C-ACTIVITY-DESC space keyword. This makes it easy to accurately model LPD and to provide documentation for LEED submissions. However, it only works if you define zones as the smaller of the HVAC zone or the space type. (You can't combine a classroom, bathroom and storage room into one space even if they are effectively one HVAC zone.)

Regards,
Bill

William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer

[ASHRAE Certified logo - greenshot 2]  [cid:image013.jpg at 01CFAA57.6CAD5810]



134 South Fitzhugh Street                 Rochester, NY 14608

T: (585) 698-1956                        F: (585) 325-6005

bbishop at pathfinder-ea.com<mailto:wbishop at pathfinder-ea.com>             www.pathfinder-ea.com<http://www.pathfinder-ea.com/>

[earth for signature]Sustainability - the forest AND the trees.



From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Singhal, Harshul
Sent: Monday, July 28, 2014 10:50 AM
To: Jeff Haberl; wafik adbelkarim
Cc: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: Re: [Equest-users] space renaming

I also feel 476 spaces are way too much. I can understand that some projects have different floor plates & plans and it can end up resulting more number of zones. But trust me the more number of zones, more complicated it gets. I did one project with almost 150 zones (multi family high rise building) and later when I moved to detailed mode  it was a pain to make changes for spaces/zones.

I would suggest rather creating separate zones for same user type spaces facing same façade, you can combine them as one single zone each floor. For corner rooms/spaces, create separate spaces. Try to keep it under 100 atleast.

Harshul Singhal
Project Consultant
Thornton Tomasetti
386 Fore Street, Suite 401
Portland, ME  04101
T 207.245.6060  F 207.245.6061
D 207.245.6074
HSinghal at ThorntonTomasetti.com<mailto:HSinghal at ThorntonTomasetti.com>
www.ThorntonTomasetti.com<http://www.ThorntonTomasetti.com>
From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Jeff Haberl
Sent: Monday, July 28, 2014 9:09 AM
To: wafik adbelkarim
Cc: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: Re: [Equest-users] space renaming

Hello Wafik.

One question you might ask is why you have 476 spaces in EQUEST?

Normally, a space is needed only if that zone has a unique load, usage, external exposure or HVAC system. Otherwise, it is more common to use a simplified zoning. For example, 5 zones are normally used for a rectangular building of more than 50 ft in depth. At most, for a multistory building, three floors can be used, one for the top floor, one for the middle floors, and one for the ground floor.

Hence, you might consider reducing the number of zones before proceeding.

Jeff


Jeff S. Haberl, Ph.D., P.E.inactive, FASHRAE, FIBPSA
Department of Architecture
Texas A&M University
College Station, Texas 77845-3581
Office: 979-845-6507, Lab: 979-845-6065
Fax: 970-862-2457, jhaberl at tamu.edu<mailto:jhaberl at tamu.edu>, www.esl.tamu.edu<http://www.esl.tamu.edu>

On Jul 26, 2014, at 3:19 PM, "wafik adbelkarim" <abdelkarim.wafik at gmail.com<mailto:abdelkarim.wafik at gmail.com>> wrote:
good day every body,

what  is the fastest and easiest way to rename about 476 space in eQUEST model.
instead of going one by one then doing the same for the thermal zones!
whats the best way to name both  using the wizard without having any errors?
is there is any shortcuts?

regards,
Wafik
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