[Bldg-sim] DOE-2.2 geometry import troubles

[Brandon Nichols]

Suggest reverse engineering...define your objective in eQuest (starting with
the lower-leftmost vertex for all polygons) and compare the resulting inp
file to yours.  Also take a close look at the DOE2.2 documentation, wherein
the coordinate system is detailed.

Suspected root cause issue is the disconnect going from the eQuest
Floor/Zone editor, where all zone (space) coordinates are entered absolute,
to the .inp file where the eQuest stores coordinates of space polygons
relative to the floor polygon.

Suggest always starting all polygons with the lower-leftmost vertex, to help
make sense of the relative coordinates and azimuths.  This habit is one
you'll be glad to have acquired, should dissecting inp files become your
muse.

Regards

Brandon Nichols
BW Nichols PE
Seattle WA


On Nov 6, 2008 4:34 PM, "Josh K" <jeemang at gmail.com> wrote:

Hi all;

I'm trying to figure out how to manually enter geometry in DOE-2.2 and I'm
having a little bit of trouble. My problems are myriad, but they essentially
boil down to this: when I enter

polygon.0 = POLYGON
  V1 = (0.0,0.0)
  V2 = (200,0)
  V3 = (200,300)
  V4 = (0,300)
  ..

floor.0 = FLOOR
  AZIMUTH = 360
  POLYGON = polygon.0
  SHAPE = POLYGON
  FLOOR-HEIGHT = 3.28
  SPACE-HEIGHT = 3.28
  ..

space.0 = SPACE
  ZONE-TYPE = UNCONDITIONED
  POLYGON = polygon.0
  SHAPE = POLYGON
  ..

face.0 = EXTERIOR-WALL
  POLYGON = polygon.0
  X = 0
  Y = 0
  Z = 0.0
  AZIMUTH = 0.0
  TILT = 0.0
  CONSTRUCTION = "EWall Construction"
  ..

and import it to eQuest (the only good way I can think of to check if I've
entered my geometry correctly), the resulting EXTERIOR-WALL surface is not
where I expect it to be. I was expecting it to be in "NE" quadrant of the
the building's XY plane, but instead it's in the "SW" quadrant, as if it had
been rotated 180 degrees about the building coordinate system's z-axis.
Puzzlingly, the SPACE and FLOOR objects appear where I would expect them to
-- in the building's "NE" quadrant.

Clearly I'm misunderstanding something about how POLYGON objects are to be
positioned. If anyone could help me to understand what I've got wrong, I
would greatly appreciate it.

Many thanks,

Josh


-- 
Josh Kjenner, EIT, LEED AP
Manasc Isaac Architects Ltd.
10225 100 Avenue :: Edmonton, AB T5J 0A1
780.429.3977

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