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<DIV dir=ltr align=left><SPAN class=663022414-21122009><FONT face=Arial
size=2>All,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=663022414-21122009><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=663022414-21122009><FONT face=Arial
size=2>The ASHRAE Journal December 2009 Issue has a fitting article "A Closer
Look at Chiller Ratings" highlighting the problems of over-reliance on
IPLV/NPLV for use with chillers, and specifically what type of impact climate
has on these ratings. Lesson: be wary of these broadly applied simplified
ratings.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=663022414-21122009><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=663022414-21122009><FONT face=Arial
size=2>eQUEST won't allow you to input IPLV to describe a system, but
you can calculate it for the part-load and off-design performance
curves that eQUEST will use as defaults, and determine if the
curves are suitable to use in your case. Just don't be surprised though if
the actual performance based on your specific building and location ends
up nowhere near the IPLV performance.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=663022414-21122009><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=663022414-21122009><FONT face=Arial
size=2>Regards,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=663022414-21122009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=663022414-21122009>
<DIV class=Section1>
<P class=MsoNormal><B><SPAN style="FONT-FAMILY: 'GillSans Light'"><SPAN
style="mso-spacerun: yes"> </SPAN></SPAN></B><B><SPAN
style="COLOR: #4d4d4d; FONT-FAMILY: 'GillSans Light'; mso-bidi-font-size: 10.0pt">Jonathan
M. Curtin, EIT, LEED</SPAN></B><SUP><SPAN
style="FONT-FAMILY: 'GillSans Light'">®</SPAN></SUP><B><SPAN
style="COLOR: #4d4d4d; FONT-FAMILY: 'GillSans Light'; mso-bidi-font-size: 10.0pt">
AP</SPAN></B><B><SPAN
style="COLOR: #4d4d4d; FONT-FAMILY: 'GillSans Light'"><BR></SPAN></B><B><SPAN
style="COLOR: #4d4d4d; FONT-FAMILY: 'GillSans Light'; mso-bidi-font-size: 10.0pt"><SPAN
style="mso-spacerun: yes"> </SPAN></SPAN></B><B><SPAN
style="COLOR: #4d4d4d; FONT-FAMILY: 'GillSans Light'">Mechanical
Engineer</SPAN></B><STRONG><SPAN
style="FONT-FAMILY: 'GillSans Light'"><?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></STRONG></P>
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<FONT face=Tahoma size=2><B>From:</B> equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Paul
Diglio<BR><B>Sent:</B> Monday, December 21, 2009 04:15 AM<BR><B>To:</B> Amandeep
Singh; equest-users@lists.onebuilding.org; John Aulbach<BR><B>Subject:</B> Re:
[Equest-users] IPLV in Heat Pumps<BR></FONT><BR></DIV>
<DIV></DIV>
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<DIV>Amandeep:</DIV>
<DIV> </DIV>
<DIV>I agree with John. Actually, I believe IPLV is a somewhat new
rating that applies to larger systems. EER or COP are much more
accurate ratings.</DIV>
<DIV> </DIV>
<DIV>I am confused about the SEER and IPLV ratings. What temperature
bin do they use to calculate these numbers? It would seem to me that
an AC system in the south would operate at a higher load throughout the
cooling season than one in the northeast. Of course, it would depend
on how the system was sized. An oversized system will operate at a
much lower load ratio than a tightly sized system.</DIV>
<DIV> </DIV>
<DIV>Does anyone know the formula?</DIV>
<DIV> </DIV>
<DIV>Paul Diglio, CEM<BR><BR>--- On <B>Sun, 12/20/09, John Aulbach
<I><jra_sac@yahoo.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid"><BR>From:
John Aulbach <jra_sac@yahoo.com><BR>Subject: Re: [Equest-users]
IPLV in Heat Pumps<BR>To: "Amandeep Singh"
<amandeep.singh@energycenter.org>,
equest-users@lists.onebuilding.org<BR>Date: Sunday, December 20, 2009,
9:02 PM<BR><BR>
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<DIV>Amandeeph:</DIV>
<DIV> </DIV>
<DIV>As far as I am concerned, IPLV is a mythical number, like SEER. It
is based on assumed levels of usage for a pumed annual usage. If your
truly need part load curves, ask the manufacturer for the 75%, 50% and
25% points. You cannot evolve these four numbers out of a single mnumber
(IPLV).<BR></DIV>
<DIV
style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman, new york, times, serif"><BR>
<DIV
style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman, new york, times, serif"><FONT
face=Tahoma size=2>
<HR SIZE=1>
<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Amandeep Singh
<amandeep.singh@energycenter.org><BR><B><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></B>
equest-users@lists.onebuilding.org<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Thu, December 17, 2009
1:03:45 PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B>
[Equest-users] IPLV in Heat Pumps<BR></FONT><BR>
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<DIV class=Section1>
<P class=MsoNormal>Hello everyone,</P></DIV>
<P class=MsoNormal> </P></DIV>
<P class=MsoNormal>I was working on a school model located in
Lakeside, San Diego county. The school has Bard wall mount heat
pumps (capacity – 2 to 4 tons), really old one. I got manufacture data
of the old and new units for replacement. The new units data has EER,
IPLV and COP ratings. I would prefer to use IPLV instead of EER
rating in case of cooling to calculate savings. The eQuest
does have options for EER and SEER but not for IPLV in the schematic
design wizard. What should I do here? </P></DIV>
<P class=MsoNormal> </P></DIV>
<P class=MsoNormal>Does it make sense to use IPLV instead of EER to
calculate savings for the Lakeside? </P></DIV>
<P class=MsoNormal>
<DIV></DIV>
<P class=MsoNormal>Thanks,
<DIV></DIV>
<P class=MsoNormal>Aman
<DIV></DIV>
<P class=MsoNormal>
<DIV></DIV>
<P class=MsoNormal><SPAN lang=EN-GB
style="FONT-SIZE: 12pt; COLOR: #0070c0; FONT-FAMILY: 'Arial', 'sans-serif'"></SPAN>
<DIV></DIV>
<TABLE class=MsoNormalTable style="WIDTH: 447pt" cellPadding=0 width=596
border=0>
<TBODY>
<TR style="HEIGHT: 96pt">
<TD
style="PADDING-RIGHT: 1.5pt; PADDING-LEFT: 1.5pt; PADDING-BOTTOM: 1.5pt; WIDTH: 207.75pt; PADDING-TOP: 1.5pt; HEIGHT: 96pt"
vAlign=top width=277>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 12pt; COLOR: #1f497d; FONT-FAMILY: 'Times New Roman', 'serif'"><IMG
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<TD
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<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial', 'sans-serif'">Amandeep
Singh</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial', 'sans-serif'"><BR>Energy
Engineer</SPAN><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman', 'serif'"></SPAN>
<DIV></DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial', 'sans-serif'">8690
Balboa Ave, Suite 100<BR>San Diego, CA 92123-1502<BR>858.634.4729
<SPAN style="COLOR: #666666">phone</SPAN><BR>858.244.1178<SPAN
style="COLOR: #666666"> fax</SPAN><BR><A
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<P class=MsoNormal><SPAN lang=EN-GB
style="FONT-SIZE: 12pt; COLOR: #0070c0; FONT-FAMILY: 'Arial', 'sans-serif'">Submit
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<DIV></DIV><BR>-----Inline Attachment Follows-----<BR><BR>
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class=plainMail>_______________________________________________<BR>Equest-users
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