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<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2>Bill,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2>thank you for your advice.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2>I followed your instructions to change the
model.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2>So I resolved the indicated
reviewer comments.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2>Now there is no difference between secondary and primary
chilled water loop.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2>But now I have the dilemma that chillers and boilers of
Baseline are heavily oversized and are not sized to 115% and 125%
respectively according to demands of ASHRAE-90.1 App. G.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2>For checkup you can look at the Screenshots of the
PS-C report, PV-A report and the SS-D report that I have
attached.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2>The part load of the chillers is about 40%-50% meaning a
size 200%-250% (see pump secondary CHW in PS-C report).
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2>The part load of the boilers is about 50%-60% meaning a
size of 167%-200% (see pump HW in PS-C
report).</FONT></SPAN></DIV></FONT></SPAN></DIV></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2>So I still have a serious problem. Any help would heavily
appreciated.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2>Can we solve this problem in eQUEST?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=203334109-25012011><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: t; mso-bidi-font-family: Arial"><SPAN
class=203334109-25012011><FONT face=Arial
color=#0000ff>Heinrich</FONT></SPAN></SPAN><o:p> </o:p></DIV>
<DIV> </DIV><BR>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader lang=de dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>Von:</B> Bishop, Bill
[mailto:wbishop@pathfinder-ea.com] <BR><B>Gesendet:</B> Montag, 24. Januar
2011 19:49<BR><B>An:</B> Heinrich.ib-bauklima.de;
equest-users@lists.onebuilding.org<BR><B>Betreff:</B> RE: [Equest-users]
eQUEST - serios trouble with LEED review<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Heinrich,<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>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">The chiller pumps
requirement your reviewer is referring to is in Section G3.1.3.11 (not
G3.1.11). The model you sent currently has one primary CHW pump attached to
each of your two chillers, a separate primary CHW pump on the primary loop,
one secondary CHW pump and one condenser water pump. You labeled your primary
chiller pumps “Secondary Pump CHW 1” and “Secondary Pump CHW 2”, which is
probably why the reviewer thinks you only have one primary pump (the one on
the primary CHW loop labeled “Primary CHW Pump”). I suggest making the
following changes:<o:p></o:p></SPAN></FONT></P>
<UL style="MARGIN-TOP: 0in" type=disc>
<LI class=MsoNormal
style="COLOR: navy; mso-list: l0 level1 lfo1; tab-stops: list .5in"><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Delete the separate pump
attached to the primary CHW loop<o:p></o:p></SPAN></FONT>
<LI class=MsoNormal
style="COLOR: navy; mso-list: l0 level1 lfo1; tab-stops: list .5in"><SPAN
class=SpellE><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Relabel</SPAN></FONT></SPAN><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"> the
chiller pumps to indicate they are primary loop
pumps<o:p></o:p></SPAN></FONT>
<LI class=MsoNormal
style="COLOR: navy; mso-list: l0 level1 lfo1; tab-stops: list .5in"><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Add condenser water pumps for
each chiller through the “Loop Attachments” tab of the chillers; delete the
other CW pump.<o:p></o:p></SPAN></FONT>
<LI class=MsoNormal
style="COLOR: navy; mso-list: l0 level1 lfo1; tab-stops: list .5in"><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Change both the primary loop and
secondary loop sizing option to “secondary” to allow eQUEST to size based on
coil loads.<o:p></o:p></SPAN></FONT>
<LI class=MsoNormal
style="COLOR: navy; mso-list: l0 level1 lfo1; tab-stops: list .5in"><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Change the chiller capacity
ratio for each chiller to 0.50. (Or use 0.575 if you want to oversize by 15%
per G3.1.2.2 – I don’t know if this is supposed to apply to chillers.) Each
chiller will be sized for half the total load.<o:p></o:p></SPAN></FONT>
<LI class=MsoNormal
style="COLOR: navy; mso-list: l0 level1 lfo1; tab-stops: list .5in"><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Allow the chiller capacity to
default (remove the 0.9 <SPAN
class=SpellE>MBtu</SPAN>/h).<o:p></o:p></SPAN></FONT>
<LI class=MsoNormal
style="COLOR: navy; mso-list: l0 level1 lfo1; tab-stops: list .5in"><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Make sure you include both/all
pages of the PS-C report – your reviewer will then see that the secondary
CHW pump is variable flow. (Your zones have two-way valves
already.)<o:p></o:p></SPAN></FONT>
<LI class=MsoNormal
style="COLOR: navy; mso-list: l0 level1 lfo1; tab-stops: list .5in"><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">The PV-A report will show that
the total primary CHW pump flow will nearly match the secondary CHW pump
flow.<o:p></o:p></SPAN></FONT> </LI></UL>
<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>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Regards,<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">Bill<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><st1:place w:st="on"><st1:City w:st="on"><B
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<st1:State w:st="on">Bishop</st1:State>, <st1:State
w:st="on">PE</st1:State></SPAN></FONT></B></st1:place><B
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BEMP, LEED<SUP>®</SUP> AP </SPAN></FONT></B><B
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Engineers & Architects LLP</SPAN></FONT></B><B><FONT
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v:shapes="_x0000_s1026"></SPAN><![endif]><st1:Street w:st="on"><FONT
face=Arial color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy; FONT-FAMILY: Arial; mso-no-proof: yes">134
South Fitzhugh Street</SPAN></FONT></st1:Street><FONT color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy; mso-no-proof: yes"><SPAN
style="mso-tab-count: 2">
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<st1:State w:st="on">NY</st1:State> <st1:PostalCode
w:st="on">14608</st1:PostalCode></SPAN></FONT><FONT color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy; mso-no-proof: yes"><BR></SPAN></FONT><FONT
face=Arial color=navy size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: navy; FONT-FAMILY: Arial; mso-no-proof: yes">T:
(585) 325-6004 </SPAN></FONT><FONT face=Arial color=black size=1><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial; mso-no-proof: yes">Ext.
114</SPAN></FONT><FONT color=navy><SPAN
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style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Arial; mso-bidi-font-size: 12.0pt; mso-no-proof: yes"><o:p></o:p></SPAN></FONT></P>
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<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">
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of
</SPAN></B>Heinrich.ib-bauklima.de<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Monday, January 24, 2011 12:28
PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B>
equest-users@lists.onebuilding.org<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Equest-users] eQUEST - serios
trouble with LEED review</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>
<DIV>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT face=Arial
size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">Hi
Everyone,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT
face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT face=Arial
size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">I got a review
comment that got me in big trouble and I can't find the solution
yet.</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT face=Arial
size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">May be there is no
solution for this in eQUEST....!</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT face=Arial
size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">I rate this forum as
the very best address for difficulties with eQUEST and LEED EAc1
simulation.</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT face=Arial
size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">So please give me
some guidance and feel free to testthe model
attached.</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT
face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT face=Arial
size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">Hereare the two
comments of the reviewer.</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><EM><I><FONT
face=Arial size=3><SPAN lang=DE
style="FONT-SIZE: 12pt; FONT-FAMILY: Arial; mso-ansi-language: DE">"It appears
as if the pumps and circulation loops were not modeled correctly for the
Baseline Case. It appears based on the PS-C reports that there is only one
primary chilled water pump and one condenser water pump for the Baseline Case.
However, ASHRAE 90.1 Section G3.1.11 requires that each chiller be modeled
with separate condenser water and chilled water pumps interlocked to operate
with each associated chiller. Please model two primary chilled water pumps and
two primary condenser water pumps in accordance with Section G3.1.11. Also
update the chilled water valves to two-way valves so that the secondary
chilled water loop operates as a variable flow loop with pumps riding the
curve. Provide updated PS-C reports confirming that the changes have been
made."</SPAN></FONT></I></EM><o:p></o:p></P>
<P><EM><I><FONT face=Arial size=3><SPAN lang=DE
style="FONT-SIZE: 12pt; FONT-FAMILY: Arial; mso-ansi-language: DE">"It is
unclear why the pump flow for the secondary chilled water loop is so much
larger than that of the primary chilled water loop when the temperature
differential for both loops is expected to be the same. It also appears based
on the outputs in PS-C that the secondary chilled water loop is operated at
the same load for every hour that it is on even though it is a variable speed
pump. Please update the secondary chilled water loop flow to be consistent
with the primary chilled water loop flow, and confirm that the secondary
chilled water loop is operating as a variable flow
loop."</SPAN></FONT></I></EM><SPAN lang=DE
style="mso-ansi-language: DE"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT
face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT face=Arial
size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">I have to
say:</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT face=Arial
size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">I didn't see any
equest-model modeled with separate condenser water and chilled water pumps
interlocked to operate with each associated chiller.
</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT face=Arial
size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">I manually resized
the boilers and chillers with reference to SS-D report, because auto sizing of
eQUEST generated capacities that were double the size of SS-D report. Resizing
of the volume flow of secondary loop of chillers according to primary loop of
chillers generated warningmessages but changed
nothing.</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT
face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><FONT face=Arial
size=3><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">Heinrich</SPAN></FONT><o:p></o:p></P></DIV>
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