[BLDG-SIM] DOE-2 Modelling Capabilities

[James J. Hirsch]

If you do not want to bother looking at the source, manuals,
and papers, Fred Winkelmann is the definitive source for this
kind of information on the DOE-2 LOADS calculation
(FCWinkelmann at lbl.gov), but here is my quick summary
(see comments embedded below ...)

Steve Moller wrote:

> Hi All,
> I'm interested in DOE-2's modelling capabilities.  Can the 2.1E engine
> handle
>     a. Walls that lean in or out (non-vertical)?

Yes.  Form factors are calculated by default for sky/ground "seen" and
the tilt is also used in solar and outside film coefficient calculations hourly.

Inside film coefficient is set, based upon tilt for exterior walls and a
constant
of .68 for windows -interior and exterior- and interior walls, and does not vary

hourly unless you explicitly specify and hourly variation (easily - but
cumbersome
- to do with a schedule for windows, and much more difficult - using functions,
and thus really impractical for most all users to consider trying - for walls.)

For 2.1E the tilt range is 0-180; for 2.2 it is -180 to 180.

>
>     b. Curved walls?

No.  You need to break them into planar sufraces.  In 2.1e these are
rectangular; in 2.2 these can be up to 30 sided polygons and can be
automatically generated once you "draw" the space outline on which
you want the walls placed.

>
>     c. Windows that lean in or out (non-vertical) with fixed shading
> devices?
>

Same as comment above for wall tilt.

>
> Thanks in advance
>
> Steve Moller                                 EMail:
> Steven.Moller at dbce.csiro.au
> CSIRO B C & E                                FAX:   +61 3 9252 6251
> PO Box 56, Highett, Vic. 3190                Voice: +61 3 9252 6000
> Australia                                    Web:
> http://www.dbce.csiro.au/res-cap/attl/
>
> Mr. Steven Moller
> Building Thermal Analyst
> CSIRO Building Construction & Engineering
>
> Interests:
> Developing building thermal simulation tools
> Reading/Writing IFC files
>
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--
Jeff Hirsch
James J. Hirsch & Associates
Building Performance Analysis Software & Consulting
12185 Presilla Road
Camarillo, CA 93012-9243 USA
phone: (805) 532-1045
fax: (805) 532-2401
email: Jeff.Hirsch at DOE2.com OR JJHirsch at ez2.net
web: http://DOE2.com


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