<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=us-ascii">
<META content="MSHTML 6.00.2900.3199" name=GENERATOR></HEAD>
<BODY>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=968510720-02042008>All,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=968510720-02042008></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=968510720-02042008>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 </SPAN></FONT><FONT face=Arial
color=#0000ff size=2><SPAN class=968510720-02042008><A
href="http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/2007-August/006284.html">problematic
challenges</A> hindering simple implementation in
eQuest.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=968510720-02042008>. </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=968510720-02042008>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.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=968510720-02042008></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=968510720-02042008>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.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=968510720-02042008></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=968510720-02042008>More information forthcoming,
hopefully...</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=968510720-02042008></SPAN></FONT><FONT face=Arial color=#0000ff
size=2><SPAN class=968510720-02042008></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=968510720-02042008>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></SPAN></FONT></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <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></DIV>
<DIV></DIV>
<DIV>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. </DIV>
<DIV> </DIV>
<DIV>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.
</DIV>
<DIV> </DIV>
<DIV>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></DIV>
<DIV><BR><BR> </DIV>
<DIV class=gmail_quote>On Fri, Mar 28, 2008 at 12:08 PM, Chris Jones <<A
href="mailto:cj@cr-jay.ca" target=_blank>cj@cr-jay.ca</A>> wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">I
am presented with the task of modelling a small commercial building<BR>with
the Mitsubishi variable flow refrigerant system - heat<BR>pumps. Does
anyone have any hints for approximating this system in<BR>DOE2.1e or
equest?<BR><BR><BR><BR>Chris Jones, P.Eng.<BR>14 Oneida Avenue<BR>Toronto, ON
M5J2E3<BR>Tel. 416 203-7465<BR>Fax. 416
946-1005<BR><BR>_______________________________________________<BR>Bldg-sim
mailing list<BR><A
href="http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org"
target=_blank>http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org</A><BR>To
unsubscribe from this mailing list send a blank message to <A
href="mailto:BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG"
target=_blank>BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG</A><BR></BLOCKQUOTE></DIV><BR>.</BODY></HTML>