<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Jeff,</DIV>
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<DIV>The system type is DX packaged single zone. From the hourly report, I found sometimes Temp correction to COOLING-EIR, Part load correction to COOLING-EIR and Operating EIR are zero when Cool on/off flag is on. Is there a specific condition that these parameters can equal zero? </DIV>
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<DIV>Thanks a lot</DIV>
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<DIV>Shaojie</DIV>
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<DIV><BR>--- On <B>Tue, 2/17/09, Jeff Hirsch <I><Jeff.Hirsch@DOE2.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid">From: Jeff Hirsch <Jeff.Hirsch@DOE2.com><BR>Subject: Re: [Bldg-sim] DX Cooling EIR Ratio Curve<BR>To: shaojieworld2006@yahoo.com<BR>Cc: glenn.haynes@rlw.com<BR>Date: Tuesday, February 17, 2009, 1:26 PM<BR><BR>
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<DIV><FONT face=Arial size=2>don't forget that the COOL-FT-MIN is used as a minimum</FONT></DIV>
<DIV><FONT face=Arial size=2>value for the curve input for the extering condenser temperture.</FONT></DIV>
<DIV><FONT face=Arial size=2>COOL-FT-MIN is also for the evap min temperature into</FONT></DIV>
<DIV><FONT face=Arial size=2>the curve. </FONT><FONT face=Arial size=2>So low OA temps and low entering wetbulb will not be</FONT></DIV>
<DIV><FONT face=Arial size=2>fully reflected into the curve values.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>COOL-FT-MIN default</FONT></DIV>
<DIV><FONT face=Arial size=2>(cond temp curve low limit)</FONT></DIV>
<DIV><FONT face=Arial size=2> water cooled 60</FONT></DIV>
<DIV><FONT face=Arial size=2> evap cooled 50</FONT></DIV>
<DIV><FONT face=Arial size=2> air or evap pre-cooled 70</FONT></DIV>
<DIV><FONT face=Arial size=2>(evap temp curve low limit)</FONT></DIV>
<DIV><FONT face=Arial size=2> evap cooled COOL-MIN-T</FONT></DIV>
<DIV><FONT face=Arial size=2> all others COOL-MIN-T - 10.0</FONT></DIV>
<DIV>--- <BR>Jeff Hirsch<BR>James J. Hirsch & Associates<BR>12185 Presilla Road<BR>Camarillo, CA 93012-9243 USA<BR>phone: (805) 553-9000<BR>fax: (805) 532-2401<BR>email: <A rel=nofollow>Jeff.Hirsch@DOE2.com</A><BR>web: <A href="http://doe2.com/" target=_blank rel=nofollow>http://DOE2.com</A><BR>skype: jeffhirschcamarillo <BR><BR><BR></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial"><B>From:</B> <A title=shaojieworld2006@yahoo.com href="mailto:shaojieworld2006@yahoo.com" target=_blank rel=nofollow>eric wang</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=glenn.haynes@rlw.com href="mailto:glenn.haynes@rlw.com" target=_blank rel=nofollow>Glenn Haynes</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A title=bldg-sim@lists.onebuilding.org href="mailto:bldg-sim@lists.onebuilding.org%20bldg-sim@lists.onebuilding.org" target=_blank rel=nofollow>bldg-sim@lists.onebuilding.org bldg-sim@lists.onebuilding.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, February 17, 2009 9:22 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Bldg-sim] DX Cooling EIR Ratio Curve</DIV>
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<DIV><SPAN style="COLOR: #4d4d4d; FONT-FAMILY: 'GillSans Light'"><STRONG>Jonathan and Glenn,</STRONG></SPAN></DIV>
<DIV><SPAN style="COLOR: #4d4d4d; FONT-FAMILY: 'GillSans Light'"><STRONG></STRONG></SPAN> </DIV>
<DIV><SPAN style="COLOR: #4d4d4d; FONT-FAMILY: 'GillSans Light'"><STRONG>Thanks a lot for your replies. However, the values I calculated by using return or mixing air wet bulb temperatures are still different to the number listed in the hourly report. </STRONG></SPAN></DIV>
<DIV><SPAN style="COLOR: #4d4d4d; FONT-FAMILY: 'GillSans Light'"><STRONG></STRONG></SPAN> </DIV>
<DIV><SPAN style="COLOR: #4d4d4d; FONT-FAMILY: 'GillSans Light'"><STRONG>Thanks</STRONG></SPAN></DIV>
<DIV><SPAN style="COLOR: #4d4d4d; FONT-FAMILY: 'GillSans Light'"><STRONG></STRONG></SPAN> </DIV>
<DIV><SPAN style="COLOR: #4d4d4d; FONT-FAMILY: 'GillSans Light'"><STRONG>Shaojie</STRONG></SPAN></DIV>
<DIV><BR><BR>--- On <B>Fri, 2/13/09, Glenn Haynes <I><<A href="mailto:glenn.haynes@rlw.com" target=_blank rel=nofollow>glenn.haynes@rlw.com</A>></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid">From: Glenn Haynes <<A href="mailto:glenn.haynes@rlw.com" target=_blank rel=nofollow>glenn.haynes@rlw.com</A>><BR>Subject: RE: [Bldg-sim] DX Cooling EIR Ratio Curve<BR>To: <A href="mailto:shaojieworld2006@yahoo.com" target=_blank rel=nofollow>shaojieworld2006@yahoo.com</A><BR>Date: Friday, February 13, 2009, 3:08 PM<BR><BR>
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<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">The wet bulb temperature refers to that entering the evaporator, which is the return air wet bulb temperature.</SPAN></FONT></DIV></DIV>
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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"> bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org] <B><SPAN style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>eric wang<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Friday, February 13, 2009 1:48 PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> bldg-sim@lists.onebuilding.org<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Bldg-sim] DX Cooling EIR Ratio Curve</SPAN></FONT></DIV></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Hi,</SPAN></FONT></DIV></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">I used the default DX Cooling EIR Ratio Curve (DX-Cool-Cap-fEWB&OAT) in eQUEST. The variables are t entering wetbulb and t enter condenser. I assume these refer to outside air wet and dry bulb temperatures. After exporting outside air wet and dry bulb temperatures in hourly report, the value of "Temp correction to COOLING-EIR" I calculated is different to the one in the hourly report by using the curve coefficients. Can anyone point out if my understanding is correct?</SPAN></FONT></DIV></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Thanks a lot for your help</SPAN></FONT></DIV></DIV>
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<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Shaojie</SPAN></FONT></DIV></DIV>
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