[bldg-sim] Green Building Studio

Sheila Sagerer sagerer at paonline.com
Wed Dec 21 06:25:20 PST 2005


Green Building StudioGood Morning All-

I have not had the opportunity to try the GBS set yet, but I was at a
seminar for it back in September.  As I understand the process and stated
below, there is very little control from the GBS site on detailed inputs.
But, the GBS site is supposed to automatically generate an eQuest input file
(*.inp) that can be downloaded for the energy modeler's use.  This would
save us modelers A LOT of input time just in creating the building while
still allowing us to have the ability to tweak occupancy, schedules and
other pertinent details to our satisfaction and do troubleshooting.  At
least we would have a time-saving starting point??

Happy Holidays.

Sheila Sagerer
Energy Engineer, LEED AP
Energy Opportunities, Inc / a 7group company
Ph: 717-880-9069
Fax:  717-291-9497

  -----Original Message-----
  From: bldg-sim at gard.com [mailto:bldg-sim at gard.com]On Behalf Of Mohit Mehta
  Sent: Tuesday, December 20, 2005 8:47 PM
  To: bldg-sim at gard.com
  Subject: [bldg-sim] Green Building Studio


  Good dialogue!

  Out of curiosity - we actually tried this GBS website – all we did was
open the Revit file (of one of our projects), exported to GBXML and load it
into the geopraxis site. Took all of 10-15 min. The site asks some basic
information about location, project statistics, and energy statistics (you
can enter your own or go with their database of energy costs based on your
zip code) and ran their report. All pretty straightforward.  The project
architect (from the design team) input this himself and forwarded the output
to me for feedback.

  The output that we got was not up to par (aware that it depends on
what/how it was input in the first place). Some quick basic observations on
the output summary -

    a.. The annual electric/fuel breakdown was missing quite a few
categories.
    b.. I am not sure what or how the schedules are input for this building.
It never asked for that input.
    c.. The envelope/glazing interpretations were suspect
    d.. The cooling load was way off (on the high side)
  The information on the report is a starting point but I am not sure who
this report is exactly meant for. Is it for the architect to interpret and
make changes or is it for the engineer/modeler who interprets the report and
gives his feedback to the architect to make the necessary changes? There is
a lot missing from the process of defining, inputting and getting a
legitimate output that can be troubleshot if something looks amiss, to feel
very confident about it. I mean, even in the most accurate of models there
is a +-5-15% error margin, if not more. In this a lot was unclear to me. It
saved us some time but are we willing to make design/mechanical changes
based on it? Personally, I am more comfortable if the process is under my
control where I can tweak the various inputs and directly see the impacts
that they might have. And I am sure most of us in this ‘group’ feel the
same.

  We will be looking at it more in depth soon.

  My two cents – Happy Holidays

  ~m




----------------------------------------------------------------------------
--

  From: bldg-sim at gard.com [mailto:bldg-sim at gard.com] On Behalf Of Zoeteman,
Mark R.
  Sent: Monday, December 19, 2005 6:41 AM
  To: bldg-sim at gard.com
  Subject: [bldg-sim] Green Building Studio



  Have bldg-sim users seen this yet (sounds too good to be true):

  Teams use their existing computer-aided design systems to communicate a
project's building geometry to the GBS website, which conducts an energy
analysis of the building design. The program enables the design team to look
at the energy impact of early design decisions, compare alternatives, and
share information more broadly with other team members.

  http://www.bdcnetwork.com/article/CA6281244.html?text=computer



  It provides whole building energy analysis using the widely accepted
building analysis program, DOE-2, at no charge to the design team. GBS is
accessed from within the design team’s 3D-CAD software.

  http://www.greenbuildingstudio.com/About.aspx



  Mark Zoeteman
  FTC&H, Inc.
  mrzoeteman at ftch.com



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