[Bldg-sim] eQuest BDL User Expression: Area of Zone

Brandon Nichols BrandonN at Hargis.biz
Thu Jan 24 22:39:26 PST 2008

Yes, my head really is hurting...!  
Just in case you're actually following this example, the keyword for
zone baseboard heating capacity is BASEBOARD-RATING
#LR("SPACE","AREA")*-30                         $ as entered into eQuest

BASEBOARD-RATING = {#LR("SPACE","AREA")*-30}    $ as stored in the .inp


From: Brandon Nichols 
Sent: Thursday, January 24, 2008 10:20 PM
To: bldg-sim at lists.onebuilding.org
Subject: eQuest BDL User Expression: Area of Zone

This started out to be a question, but in the course of making it
intelligible I discovered the answer.
My objective was to set the user default expression for fin tube
radiation to something like 30 BTUH per square foot in each zone.
However I couldn't figure out how to get the AREA defined by the SPACE
which corresponds to the ZONE into the zone's user expression... 
SPACE is not a parent, grandparent or great grandparent of a ZONE -- and
the #P (Parent) funtion was on the frontier of my BDL knowledge.  So
after a couple hours of headbanging while reading the "KEYWORD
EXPRESSIONS / BDL Functions" subsection of the "Building Description
Language" chapter of the DOE-2.2 Vol 3: 'Topics' manual, I was ready to
throw in the towel and ask the group, as nothing was coming up on an
archive search.  
But in the process of writing this e-mail, I chanced to read the #LR
(LocalRef) definition one last time and the light bulb went on.  So here
it is, a very simple user default expression for zone fin tube radiation
HEATING-CAPACITY, set to 30 BTUH per square foot (negative sign req'd by
#LR("SPACE","AREA")*-30                         $ as entered into eQuest

HEATING-CAPACITY = {#LR("SPACE","AREA")*-30}    $ as stored in the .inp
Enjoy, my head is still hurting...
Brandon Nichols, PE, LEED(r) AP

600 Stewart Street

Suite 1000

Seattle, WA 98101



d | 206.436.0400  c | 206.228.8707

o | 206.448.3376  f  | 206.448.4450

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