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<div class=Section1>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
agree with Larry. There is no exact system specified in the ASHRAE 90.1 that matches
the VRV system. We used to model the VRV system using the efficiencies in Table
6.8.1B, however note that these efficiencies are typically for full load
operations, hence it will not capture the advantage of the part load capability
of the VRV systems. I.e. to say, the savings calculated as such will be typically
conservative.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Also
note that VRV systems are generally waived from the DOE test procedure
applicable to commercial package air-cooled central air conditioners and heat
pumps (2 systems that I know of are the Mitsubishi City-Multi and Sanyo VRV-III
systems) although they have to comply with the alternate testing procedure. So
just take note of the system efficiencies used for the modeling.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>-------------------------------------------------<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Gavin
Gui<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Project
Engineer<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>ERS,
Inc.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>120
Water Street, Ste. 350<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>North
Andover, MA 01845<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Ph:
978-521-2550, x 236<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Fax:
978-521-4588<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><a
href="mailto:jrogers@ers-inc.com">ggui@ers-inc.com</a> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><a
href="http://www.ers-inc.com/">www.ers-inc.com</a> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>-------------------------------------------------</span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Larry
Degelman<br>
<b>Sent:</b> Monday, March 15, 2010 9:24 AM<br>
<b>To:</b> Shubhra Kothari; reniel barroso<br>
<b>Cc:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] VRV System Equipment Efficiency<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Here's
another opinion (non-authoritative): I believe the VRV efficiency
requirements would match best with the "air cooled, cooling and heating
modes" requirements in Table 6.8.1B (for heat pumps). In the ECB
method, this would most likely be system 8, Packaged terminal heat
pumps. I agree that the ventilation should be modeled separately as a
DOAS.</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>LOD</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>===========================<br>
Larry O. Degelman, P.E.<br>
Professor Emeritus of Architecture<br>
Texas A&M University<br>
===========================</span><o:p></o:p></p>
</div>
<div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p> </o:p></span></p>
</div>
<div>
<div>
<p class=MsoNormal style='background:whitesmoke'><b><span style='font-size:
10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a
href="mailto:shubhrakothari@gmail.com"
title="mailto:shubhrakothari@gmail.com CTRL + Click to follow link">Shubhra
Kothari</a> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='background:whitesmoke'><b><span style='font-size:
10.0pt;font-family:"Tahoma","sans-serif"'>Sent:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Monday, March 15,
2010 12:32 AM<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='background:whitesmoke'><b><span style='font-size:
10.0pt;font-family:"Tahoma","sans-serif"'>To:</span></b><span style='font-size:
10.0pt;font-family:"Tahoma","sans-serif"'> <a
href="mailto:renielbarroso@yahoo.com"
title="mailto:renielbarroso@yahoo.com CTRL + Click to follow link">reniel
barroso</a> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='background:whitesmoke'><b><span style='font-size:
10.0pt;font-family:"Tahoma","sans-serif"'>Cc:</span></b><span style='font-size:
10.0pt;font-family:"Tahoma","sans-serif"'> <a
href="mailto:bldg-sim@lists.onebuilding.org"
title="mailto:bldg-sim@lists.onebuilding.org CTRL + Click to follow link">bldg-sim@lists.onebuilding.org</a>
<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='background:whitesmoke'><b><span style='font-size:
10.0pt;font-family:"Tahoma","sans-serif"'>Subject:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Re: [Bldg-sim] VRV
System Equipment Efficiency<o:p></o:p></span></p>
</div>
</div>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>Well, there seems to be no ARI standard for testing VRV yet.
So, you won't find it in 90.1. <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>The closest you can get is packaged single zone (match
cooling capacity) i believe but you'll have to figure out a way of
modelling the fresh air side- as DOAS or others. <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Thanks<br>
Shubhra Kothari<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>On Mon, Mar 15, 2010 at 12:26 AM, reniel barroso <<a
href="mailto:renielbarroso@yahoo.com"
title="mailto:renielbarroso@yahoo.com CTRL + Click to follow link">renielbarroso@yahoo.com</a>>
wrote:<o:p></o:p></p>
<div>
<div>
<div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi
to all!<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Where
can we find the Minimum Requirement System Efficiency of a VRV System in
ASHRAE 90.1?<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Which
of those systems mentioned in the ASHRAE 90.1 can we use to compare such
equipment?<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Reniel<o:p></o:p></span></p>
</div>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><a
href="http://sg.rd.yahoo.com/aa/mail/domainchoice/mail/signature/*http:/mail.promotions.yahoo.com/newdomains/aa/"
target="_blank">Get your preferred Email name! </a><br>
Now you can @<a href="http://ymail.com/" target="_blank">ymail.com</a> and @<a
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