[BLDG-SIM] hornets nest? Stay the course !!

[Paul Reeves]

"Pictures are nice, but pretty pictures of airplanes doesn't get the airplanes built or off the ground."

I believe that the 3D and 2D rendering of the building geometry is essential in producing an accurate model of a complex building.  Do you think they built better airplanes without any renderings or visual models?  Think again.  Until Joe Huang's DrawBDL came out, even models produced by the national lab responsible for DOE2 development had some incorrect geometry. Misplaced a wall or window? .... impossible to tell just by looking at BDL code.


----- Original Message ----- 
  From: John Aulbach 
  To: BLDG-SIM at gard.com 
  Sent: Thursday, January 27, 2000 3:09 PM
  Subject: [BLDG-SIM] hornets nest? Stay the course !!


  I used the Meriwether ESAS hourly analysis program from 1977 through 1984
  and the DOE-2.1 A through E since 1984 to date. The problem with all the
  DOE-2 interfaces is that the user STILL has to understand DOE-2, what it's
  keywords are, and what is actually trying to be modeled. Real engineering
  and energy dynamics insite must accompany any model effort, to truly
  represent what the building is, and what it can become (ECMs).
   
  I have been exposed to PowerDOE but don't yet have time to learn the
  geometry games it requires up front. PowerDOE will be nice to show a client
  the building geometry reproduce from the model input, but I am not in the
  pictoral rendering game. Rather, I need to demonstrate to the client the
  results of PS-E, how they change per ECM, and the correct dynamics of the
  utitliy rates as each ECM changes. Pictures are nice, but pretty pictures of
  airplanes doesn't get the airplanes built or off the ground.
   
  Another mistake production DOE-2 using companies use is trying to use DOE-2
  as a DESIGN program, rathher than an ENERGY ANALYSIS program.  A TRACE or
  Carrier E-20 is still far better at assessing exact coil sizes and airflows.
  There is not enought SYSTEMS information coming out to make me feel
  comfortable in ever using it accurately for design.
   
  It really took me 5 - 6 years to REALLY learn what DOE-2 does and doesn't do
  (and I STILL forget). And now another program is to be placed upon us
  (EnergyPlus) that we will have to learn the idiosyncrasies of.
   
  And for the retrofit industry, I STILL gotta match the utitliy meters....

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