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Thanks for your response. I will check with the VisualDOE folks to
find out if there that is a viable option at this point.<br><br>
At 18:37 2008-04-02, Brandon Nichols wrote:<br>
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<font size=2 color="#0000FF">All,<br>
</font> <br>
<font size=2 color="#0000FF">It is my understanding that Mitsubishi and
Daikan funded development of DOE2 VRF routines that run under EnergyPro
and VisualDOE using DOE2.1E, and there may be some
<a href="http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/2007-August/006284.html">
problematic challenges</a> hindering simple implementation in
eQuest.<br>
. <br>
Will see if I can elicit comment on this topic from eQuest's dynamic,
talented and decidedly underappreciated developers, who tirelessly toil
day and night on our behalf. Perhaps we can show our appreciation
for them by all lobbying our local Mitsubishi / Daikan reps to secure
funding for a port-to-eQuest effort. After all, updating to eQuest
it seems would be in the manufacture's best interests, with usage of
variable refrigerant flow systems gaining traction in the
marketplace.<br>
</font> <br>
<font size=2 color="#0000FF">As a short-term workaround, am following up
on a rumor that there may be a way for an eQuest parametric run to be
manually edited to reference these routines, provided they can be
obtained. Will also see what I can do about actually obtaining
them. This isn't a purely altruistic gesture, I too am working on a
VRF system.<br>
</font> <br>
<font size=2 color="#0000FF">More information forthcoming,
hopefully...<br>
</font> <br>
<font size=2 color="#0000FF">Brandon Nichols, PE, LEED AP<br>
Mechanical<br>
HARGIS ENGINEERS<br>
600 Stewart St<br>
Suite 1000<br>
Seattle, WA 98101<br>
d | 206.436.0400 c | 206.228.8707<br>
o | 206.448.3376 f | 206.448.4450<br>
<a href="http://www.hargis.biz">www.hargis.biz</a><br>
</font><br>
<hr>
<font face="Tahoma" size=2><b>From:</b>
bldg-sim-bounces@lists.onebuilding.org
[<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" eudora="autourl">
mailto:bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of
</b>Haider Khan<br>
<b>Sent:</b> Tuesday, April 01, 2008 10:09 AM<br>
<b>To:</b> Chris Jones<br>
<b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] Mitsubishi VFR systems<br>
</font><br>
As far as I know you cannot do it in DOE2 directly, but a quasi DOE2
approach would be to calculate the hourly system loads using DOE2 and
calculate VRV energy consumption using spreadsheet calculations. You will
have to create a regression based model to calculate the energy
consumption as a function of the capacity and outdoor air temperature
(The data is available on Mr. Slim website). Once you are sure the model
is working correctly (be sure to put limits on your equations for out of
range data) you can use the hourly weather boundary conditions to
calculate the annual energy consumption. <br>
<br>
If you are doing code compliance using eQUEST you can calculate the
average calibrated EER using the above methodology and use it as a DOE2
input. <br>
<br>
Best Regards,<br>
Haider M. Khan, MSME <br>
<br>
ICF International<br>
9300 Lee Highway,<br>
Fairfax, VA 22031<br>
Ph: 703 934-3868<br>
Fax: 703 934-3530<br><br>
<br>
<br>
On Fri, Mar 28, 2008 at 12:08 PM, Chris Jones
<<a href="mailto:cj@cr-jay.ca">cj@cr-jay.ca</a>> wrote:<br>
<dl>
<dd>I am presented with the task of modelling a small commercial
building<br>
<dd>with the Mitsubishi variable flow refrigerant system - heat<br>
<dd>pumps. Does anyone have any hints for approximating this system
in<br>
<dd>DOE2.1e or equest?<br><br>
<br><br>
<dd>Chris Jones, P.Eng.<br>
<dd>14 Oneida Avenue<br>
<dd>Toronto, ON M5J2E3<br>
<dd>Tel. 416 203-7465<br>
<dd>Fax. 416 946-1005<br><br>
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. <br>
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<br>
Chris Jones, P.Eng.<br>
14 Oneida Avenue<br>
Toronto, ON M5J2E3<br>
Tel. 416 203-7465<br>
Fax. 416 946-1005</body>
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