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The loops and plant in DOE 2.2 are great, the real OA HXs, and better economizer
ctrls are great, and the window module is nifty, and Equest is amazing freeware,
but .....<br>
<br>
We still use DOE 2.1 in lots of commercial work. In my experience DOE 2.2
crashes much more often. Often this seems to be associated with excessive
flow demands on a loop, but the process of debugging is much more frustrating
than errors caught by the BDL processor. Perhaps some checking is built into
Equest or PowerDOE, and so is not done in BDL. Recent versions are better,
but not immune by any means. <br>
<br>
DOE 2.2 does not implement the custom "functions" which we use to input better
space daylight level correlations derived from Radiance, etc, to the DOE2
daylighting routine. Occasionally we've used functions for other things,
but this usually did seem like an exercise better suited to academia!<br>
<br>
Only version 41j of DOE2.2 had tower free cooling, in 41i this feature was
removed. Perhaps there is a work-around I have not thought of; many of our
larger modeled buildings use flat-plate HXs for modest winter CHW loads.
(The Canadians use these extensively instead of air-side economizers, for
a variety of good reasons.)<br>
<br>
We've never found a GUI or wizard that managed multiple ECM runs as well
as some spreadsheet or database methods we use. The available front-ends
for 2.1 and 2.2 do generate initial model inputs, particularly geometry,
nicely in most cases. As far as I know, both can be used for code compliance,
as long as the code or design does not require or use waterside economizing.<br>
<br>
Anyone else care to comment?<br>
<br>
Chris Jones wrote:<br>
<blockquote type="cite" cite="mid:MDAEMON-F200302051308.AA0845187pd80000336891@gard.com">
We use DOE2.1e in our shop. Primarily because of the significant verification
against measured data that has been done on DOE2.1e over the years. The
other reason is that ASHRAE 90.1 and in particular LEED require simulation
using DOE2.1e. <br>
<br>
Here in Canada, the Model National Energy Code, Performance Option required
simulation using EE4 (a free compliance tool <a class="moz-txt-link-freetext" href="http://www.ee4.com">http://www.ee4.com</a> ) that used
the DOE2.1e engine from Hirsh and Associates. Similar to eQuest, you can
use EE4 to quickly generate an input file then edit it for you particular
situation.<br>
<br>
<br>
<blockquote type="cite" class="cite" cite=""><font face="arial" size="2" color="#000080">
We use eQuest extensively, sometimes using the wizard mode to get started,
sometimes not. We began using DOE2.1d when it was first available on PC platforms
and kept with it through PowerDOE and the `never officially released DOE2.2.
We often use eQuest to create BDL code which we then edit with a text editor.
I must admit I m sometimes surprised to hear of modelers (often in Academic
situations) still working with 2.1e when `2.2 is a significant improvement
and is absolutely free via eQuest. <br>
</font><br>
<font face="arial" size="2" color="#000080">I, like John, am holding
off on EnergyPlus until I can justify the tremendous expense of training
my people on a new product that is still not ready for prime time. Eventually,
I hope, but not yet. I m guessing five years before there is a product that
is enough better than eQuest to justify the investment. (And that s assuming
eQuest doesn t continue to improve). <br>
</font><br>
<font face="arial" size="2" color="#000080">I imagine that there are numerous
eQuest users that are not aware of the BLDG-SIM forum. Too bad it would be
nice to see more interaction around the eQuest program. Perhaps SCE/EDR
could provide an information blurb about this forum on their web site or
to everyone who down loads eQuest.<br>
</font><br>
<font face="arial" size="2" color="#000080"> <br>
</font><br>
<font face="arial" size="2" color="#000080"> <br>
</font><br>
<font face="arial" size="2" color="#000080">Mark E. Case, P.E.<br>
</font><br>
<font face="arial" size="2" color="#000080">etc Group, Inc.<br>
</font><br>
<font face="arial" size="2" color="#000080">Salt Lake City, Utah<br>
</font><br>
<font face="arial" size="2" color="#000080"> <br>
</font><br>
</blockquote>
</blockquote>
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