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Why not choose a heat pump with a boiler and cooling tower as the baseline?<BR><BR>
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Date: Mon, 17 Mar 2008 15:09:26 -0400<BR>From: kwalkerman@gmail.com<BR>To: kswartz@ecw.org<BR>CC: bldg-sim@lists.onebuilding.org<BR>Subject: Re: [Bldg-sim] FW: LEED system selection for GSHP<BR><BR>Thanks for all the comments. This is for LEED EA Credit 1. The system has no fossil fuel supplementation, so PSZ-HP it is. The poor baseline benefits the project in terms of LEED points, however, this leads to something I've been thinking...<BR><BR>Why not use the same baseline for all buildings? Or at least make baseline system selection appropriate for different climate zones. This baseline would make choosing electric resistance heat look somewhat reasonable in this climate. Use of electric resistance heat is actually no longer legal in the state of Vermont for commercial construction.<BR><BR>~Karen~<BR><BR>
<DIV class=EC_gmail_quote>On Mon, Mar 17, 2008 at 2:32 PM, Keith Swartz <<A href="mailto:kswartz@ecw.org">kswartz@ecw.org</A>> wrote:<BR>
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<FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Karen,</SPAN></FONT><BR>
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<FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I agree with your interpretation -- the system would be 4-PSZ-HP – assuming you are using the 2004 edition of ASHARE 90.1. The User's Manual states that if the heating energy source for the proposed building is electricity, then the heating energy source for the baseline building has to be electricity too. This system would not actually be used in Wisconsin either. Fortunately for me, the utility programs that I model for allow me to use "engineering judgment" (common sense), so I can use a realistic system for the baseline. But if you have to go by the book, then 4-PSZ-HP it is! I can see how this could overstate the savings for a ground-source heat pump system in a cold climate like ours.</SPAN></FONT><BR>
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<FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Sincerely,</SPAN></FONT><BR>
<FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Keith Swartz</SPAN></FONT><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">, PE, LEED® AP</SPAN></FONT><BR>
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<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"> Karen Walkerman [mailto:<A href="mailto:kwalkerman@gmail.com">kwalkerman@gmail.com</A>] <BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Friday, March 14, 2008 12:36 PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> <A href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</A><BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Bldg-sim] LEED system selection for GSHP</SPAN></FONT><BR></DIV>
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<FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Hello friends,<BR><BR>Anyone know what the BASELINE system should be if the design system is a ground source heat pump? I have a non-residential building, 3 floors and < 75,000 square feet. The design system type is groundsource heat pump, which leads to system 4-PSZ-HP, which nobody would ever choose for this climate (Burlington, VT).<BR><BR>Any thoughts?<BR><BR>~Karen~</SPAN></FONT><BR></DIV></DIV><BR>_______________________________________________<BR>Bldg-sim mailing list<BR><A href="http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org" target=_blank>http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org</A><BR>To unsubscribe from this mailing list send a blank message to <A href="mailto:BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG">BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG</A><BR><BR></BLOCKQUOTE></DIV><BR><BR clear=all><BR>-- <BR>Karen Walkerman<BR>Second Law Consulting<BR>802-238-0980<BR><A href="mailto:kwalkerman@gmail.com">kwalkerman@gmail.com</A> </BLOCKQUOTE><br /><hr />Shed those extra pounds with MSN and The Biggest Loser! <a href='http://biggestloser.msn.com/' target='_new'>Learn more.</a></body>
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