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<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2>OK All, </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2>Has anyone looked at <A
href="http://www.eere.energy.gov/buildings/appliance_standards/residential/pdfs/cac_tp_101105.pdf">this
lovely document</A>, which is the Department of Energy's test procedure for
air conditioners and heat pumps to determine EER and SEER? To
this I turned to answer the burning question "what is the standard
external fan static pressure drop specified to calculate EER and
SEER?"</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2>Seems to me after wading through the swamp
of equations in the back of the document that fan energy in EER and SEER
calculations is specified at a 0.05 inch external static pressure
drop.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2>So then I started digging around for data to support my
intuitive feeling that fan energy is going to be something like 1/10th that
of compressor energy on small heat pumps.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2>In the process I ran across this nifty <A
href="http://www.ornl.gov/~wlj/hpdm/doehpdm.shtml">DOE/ORNL Heat Pump Design
Model</A>. Now we're cooking... see <A
href="http://elcca-exchange.blogspot.com/2007/10/heat-pump-parametrics.html">this
post</A> for a 3D plot of parametric runs (did I say 'nifty'?),
varying supply airflow and static pressure, from 600 to 4200 and 0.05 to 0.65
respectively.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2>I'm standing by my assertion that supply fan energy does
not need to be subtracted from heat pump EER as SEER and the new number
recalculated -- playing those kinds of games can lead to an exercise in
futility.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2><A
href="http://www.ornl.gov/~wlj/hpdm/doehpdm.shtml"></A></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=945231004-16102007><FONT face="Courier New"
color=#0000ff size=2>Best regards,</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV align=left>
<DIV align=left><FONT face=Arial size=2></FONT> </DIV><SPAN
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<DIV><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><SPAN
class=212011020-11052004><FONT color=#000000>Brandon Nichols,
PE, LEED<SUP><SPAN style="FONT-SIZE: 8pt">®</SPAN></SUP>
AP</FONT></SPAN></SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt"><SPAN
class=212011020-11052004><FONT
color=#000000>Mechanical</FONT></SPAN></SPAN></DIV>
<DIV><SPAN
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color=#000080><STRONG>HARGIS ENGINEERS</STRONG></FONT></DIV>
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206.448.4450</SPAN></FONT></P></SPAN></SPAN>
<DIV> </DIV></DIV>
<DIV> </DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> Fred Porter
[mailto:fporter@archenergy.com] <BR><B>Sent:</B> Friday, October 12, 2007 5:22
PM<BR><B>To:</B> BLDG-SIM; Brandon Nichols<BR><B>Subject:</B> RE: [BLDG-SIM]
Heat Pump COP<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=TT12B7o00 size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: TT12B7o00">G3.1.2.1 </SPAN></FONT><B><FONT
size=2><SPAN style="FONT-WEIGHT: bold; FONT-SIZE: 10pt">Equipment Efficiencies.
</SPAN></FONT></B><FONT size=2><SPAN style="FONT-SIZE: 10pt">All HVAC
equipment</SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">in the <I><SPAN style="FONT-STYLE: italic">baseline
building design </SPAN></I>shall be modeled at the
minimum<o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><I><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-STYLE: italic">efficiency </SPAN></FONT></I><FONT
size=2><SPAN style="FONT-SIZE: 10pt">levels, both part load and full load, in
accordance<o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">with Section 6.4. Where <I><SPAN
style="FONT-STYLE: italic">efficiency </SPAN></I>ratings, such as
EER<o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">and COP, include fan energy, the descriptor shall be
broken<o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">down into its components so that supply fan energy can
be<o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">modeled separately.<o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face=TT12B7o00 size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: TT12B7o00">G3.1.2.4 </SPAN></FONT><B><FONT
size=2><SPAN style="FONT-WEIGHT: bold; FONT-SIZE: 10pt">Fan System Operation.
</SPAN></FONT></B><FONT size=2><SPAN style="FONT-SIZE: 10pt">Supply and return
fans<o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">shall operate continuously whenever spaces are occupied
and<o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">shall be cycled to meet heating and cooling loads during
unoccupied<o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">hours. If the supply fan is modeled as cycling and
fan<o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">energy is included in the energy-efficiency rating of
the equipment,<o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">fan energy shall not be modeled
explicitly.</SPAN></FONT><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT>
</P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT>
</P>
<DIV>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">--</SPAN></FONT><FONT
color=navy><SPAN style="COLOR: navy"><o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Fred
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy"><o:p> </o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy"> </SPAN></FONT><o:p></o:p> </P></DIV>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> Brandon
Nichols [mailto:BrandonN@Hargis.biz] <BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Friday, October 12, 2007 6:14
PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> Fred Porter;
BLDG-SIM@gard.com<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> RE:
[BLDG-SIM] Heat Pump COP</SPAN></FONT><o:p></o:p> </P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">Good
point Fred, for larger unitary packages and for dialing-in energy savings
rebate studies. I did say 'arguably', and yours is an insightful
observation. Scanned all 90.1-2004 but didn't see the reference you
alluded to -- if you can be more specific please
advise.</SPAN></FONT><o:p></o:p> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">Given the small
heatpumps my firm is accustomed to installing, coupled with the fuzzy level of
design at which we're doing our preliminary energy studies, the simplification
of discounting fan operation when compressors aren't running I think is well
within the error bars of the overall study.</SPAN></FONT><o:p></o:p> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">Which doesn't
provide any comfort from the realization that this business gives one plenty of
cause to ask where picking the theoretical flyspecs out of manufacturer's
published pepper has crossed a threshold of mind-numbingly diminished
returns!</SPAN></FONT><o:p></o:p> </P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT> </P>
<P class=MsoNormal><FONT face="Courier New" color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">Regards
</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT> </P>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Brandon Nichols,
PE, LEED</SPAN></FONT><SUP><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 8pt; COLOR: black; FONT-FAMILY: Arial">®</SPAN></FONT></SUP><FONT
face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"> AP</SPAN></FONT><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Mechanical</SPAN></FONT><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT> </P></DIV>
<DIV>
<P class=MsoNormal><STRONG><B><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">HARGIS
ENGINEERS</SPAN></FONT></B></STRONG><FONT face=Arial color=gray size=2><SPAN
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<P class=MsoNormal><st1:Street w:st="on"><st1:address w:st="on"><FONT face=Arial
color=#515151 size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: #515151; FONT-FAMILY: Arial">600 Stewart
Street</SPAN></FONT></st1:address></st1:Street><FONT color=gray><SPAN
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1000</SPAN></FONT></st1:address><FONT color=gray><SPAN
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style="COLOR: gray"><o:p></o:p></SPAN></FONT> </P>
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style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT> </P></DIV>
<DIV>
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style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT> </P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT> </P>
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<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
BLDG-SIM@gard.com [mailto:BLDG-SIM@gard.com] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Fred Porter<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Friday, October 12, 2007 3:31
PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B>
BLDG-SIM@gard.com<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B>
[BLDG-SIM] Heat Pump COP</SPAN></FONT><o:p></o:p> </P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">The method cited below
only gives correct results if the heat pump fan operates intermittently on a
call for heat/cool, and if the fan as installed runs at its ARI-tested power.
Otherwise this method greatly under-estimates fan energy, at least for constant
speed fans. This is mentioned specifically for App G/ECB models either in the
Standard itself or in the UM.</SPAN></FONT> <FONT face=Arial color=navy
size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT>
</P>
<DIV>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">--</SPAN></FONT> <FONT
color=navy><SPAN style="COLOR: navy"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Fred
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=navy size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: navy"> </SPAN></FONT> <o:p></o:p></P></DIV>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> Brandon
Nichols [mailto:BrandonN@Hargis.biz] <BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Friday, October 12, 2007 3:47
PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> Fred Porter;
BLDG-SIM@gard.com<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> RE:
[BLDG-SIM] Heat Pump COP</SPAN></FONT> <o:p></o:p></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT> </P>
<H5 style="MARGIN: 0in 0in 0pt"><B><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt"> <o:p></o:p></SPAN></FONT></B></H5>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: blue">Good point, John -- but there may
be an arguably easier way to not double-count fan energy...following is a
reprint from the DOE2 documentation:</SPAN></FONT> <o:p></o:p></P></DIV>
<H5 style="MARGIN: 0in 0in 0pt"><B><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt"> <o:p></o:p></SPAN></FONT></B></H5>
<H5 style="MARGIN: 0in 0in 0pt"><B><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">COOLING-EIR <o:p></o:p></SPAN></FONT></B></H5>
<P class=MsoBodyText style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">The Electric Input Ratio (EIR), or
1/(Coefficient of Performance), for the cooling unit at ARI rated conditions.
The program defines EIR to be the ratio of the electric energy input to
the rated capacity, when both the energy input and rated capacity are expressed
in the same units. This EIR is at ARI rated conditions, i.e., without correction
for different temperature or part load. <o:p></o:p></SPAN></FONT></P>
<P class=MsoBodyText style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">Note: If you include fan electric
energy consumption in your value of COOLING-EIR, then you should <FONT
color=red><SPAN style="COLOR: red">set</SPAN></FONT> <FONT color=red><SPAN
style="COLOR: red">SUPPLY-KW/FLOW to zero (and SUPPLY-STATIC, SUPPLY-EFF and
SUPPLY-DELTA-T should be omitted). Otherwise, the supply fan electrical energy
will be double counted.</SPAN></FONT> For commercial systems the default value
of COOLING-EIR includes compressor and outdoor fan energy, but not indoor fan
energy. <o:p></o:p></SPAN></FONT></P>
<DIV>
<H5><B><FONT face="Times New Roman" size=2><SPAN
style="FONT-SIZE: 10pt">HEATING-EIR <o:p></o:p></SPAN></FONT></B></H5>
<P class=MsoBodyText><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Electric Input Ratio, or 1/(heating Coefficient of
Performance), for the heat pump. This EIR is at ARI rated conditions, i.e.,
without corrections for temperature or part load. The <STRONG><B><FONT
face="Times New Roman" color=red><SPAN
style="COLOR: red">program-calculated</SPAN></FONT></B></STRONG> HEATING-EIR
does not include fan power and heat. This keyword is appropriate only to HP,
RESYS, and PTAC systems. <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: blue">Mysteriously, the HEATING-EIR documentation
makes no mention of the fan energy double counting issue. But if you're
consistent and use 3.41 divided by the manufacturers published EER for the
cooling EIR, the inverse of the published COP for the heating EIR,
and zero-out the supply fan energy as described in the
documentaion ... then Bob's your uncle, right?
</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: blue">FWIW, that's the way we do
it...</SPAN></FONT> <o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Brandon Nichols,
PE, LEED</SPAN></FONT><SUP><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 8pt; COLOR: black; FONT-FAMILY: Arial">®</SPAN></FONT></SUP><FONT
face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial"> AP</SPAN></FONT>
<FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Mechanical</SPAN></FONT>
<FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><STRONG><B><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">HARGIS
ENGINEERS</SPAN></FONT></B></STRONG> <FONT face=Arial color=gray size=2><SPAN
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1000</SPAN></FONT></st1:address> <FONT color=gray><SPAN
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|</SPAN></FONT></B><FONT face=Arial color=gray size=2><SPAN
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<B><SPAN style="FONT-WEIGHT: bold">c | </SPAN></B>206.228.8707</SPAN></FONT>
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|</SPAN></FONT></B><FONT face=Arial color=gray size=2><SPAN
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<B><SPAN style="FONT-WEIGHT: bold">f |</SPAN></B>
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<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT> </P>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
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<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
BLDG-SIM@gard.com [mailto:BLDG-SIM@gard.com] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Fred Porter<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Friday, October 12, 2007 10:23
AM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B>
BLDG-SIM@gard.com<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B>
[BLDG-SIM] Heat Pump COP</SPAN></FONT> <o:p></o:p></P>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">Yes and no. The energy is "removed," but
the COP improves because the fan heat had a COP of 1.0, and is included in the
rated gross kW in and Btuh out. I think the T24 ACM may have a "method" or
formula.<o:p></o:p></SPAN></FONT> </P>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<HR align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><B><FONT face="Times New Roman"
size=3><SPAN style="FONT-WEIGHT: bold; FONT-SIZE: 12pt">From:
</SPAN></FONT></B>Aulbach, John<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:
</SPAN></B>Thu, 10/11/2007 3:25pm<BR><B><SPAN style="FONT-WEIGHT: bold">To:
</SPAN></B>BLDG-SIM@gard.com<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:
</SPAN></B>[BLDG-SIM] Heat Pump COP <o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Folks:</SPAN></FONT>
<o:p></o:p></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">In eQuest, the Energy
Input Ratio (EIR) can be derived from EER or COP given for a unit or from a
Standard. To correctly model such a unit, one must subtract the fan energy for
the unit to obtain the EER (EIR) of the compressor only. This improves the input
from, say, a COP of 12.3 to 15.</SPAN></FONT> <o:p></o:p></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">What about in the case
of the heat pump heating COP? Must one subtract out the fan energy here as well,
thus "worsening" the COP for the heating side?</SPAN></FONT> <o:p></o:p></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">I cannot find anything
written on this subject.</SPAN></FONT> <o:p></o:p></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Thanks.</SPAN></FONT>
<o:p></o:p></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: blue">John R. Aulbach, PE, CEM</SPAN></FONT>
<o:p></o:p></P>
<P class=MsoNormal><EM><I><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Project
Manager</SPAN></FONT></I></EM> <o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Nexant,
Inc</SPAN></FONT><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">.</SPAN></FONT> <o:p></o:p></P>
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style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">100 North Barranca, <st1:address
w:st="on"><st1:Street w:st="on">Suite</st1:Street>
820</st1:address></SPAN></FONT> <o:p></o:p></P>
<P class=MsoNormal><st1:place w:st="on"><st1:City w:st="on"><FONT face=Arial
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Covina</SPAN></FONT></st1:City><FONT face=Arial size=2><SPAN
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style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Phone: 626-430-9054</SPAN></FONT>
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title=mailto:jaulbach@nexant.com
href="mailto:jaulbach@nexant.com">jaulbach@nexant.com</A></SPAN></FONT>
<o:p></o:p></P>
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