<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2900.3059" name=GENERATOR></HEAD>
<BODY>
<DIV><SPAN class=515210716-28032007><FONT face=Arial><FONT size=2>Bridgette<SPAN
class=700151418-28032007>:</SPAN></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial><FONT size=2><SPAN
class=700151418-28032007></SPAN></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial><FONT size=2><SPAN
class=700151418-28032007>Regarding the difference among PVVT, PVAVS, and the PSZ
systems, please refer the DOE-2.2 manual Volume 3: Topics (<A
href="http://doe2.com/download/DOE-22/DOE22Vol3-Topics.pdf">http://doe2.com/download/DOE-22/DOE22Vol3-Topics.pdf</A>).</SPAN></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial><FONT size=2><SPAN
class=700151418-28032007></SPAN></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial><FONT size=2><SPAN
class=700151418-28032007>Basically, the difference among these three systems is
the way to control supply airflow and temperature in response to varied heating
and cooling loads. Starting from <FONT face=Verdana>version 44d3 of DOE-2.2
(eQUEST version 3.6), t</FONT>hese three systems can all be used to simulate the
airside of the water-to-air heat pumps that attach to a WLHP water loop. If you
use wizard to create a GSHP system, the airside system is PVVT with a set
of defaults for WLHP application. These defaults include: <FONT
face="Times New Roman">MIN-FLOW-RATIO = 1 for fan; CONDENSER-TYPE = <FONT
size=3>WATER-COOLED, which is attached to a WLHP water loop</FONT><FONT size=2>;
HEAT-SOURCE = <FONT size=3>HEAT-PUMP</FONT>. Consequently, the default
performance curves are those for representative GSHP. With PVVT system,
eQUEST/DOE-2.2 has more flexibility to simulate WLHP system, such as the
water-to-air heat pump with staged capacity and airflow, DOAS with combination
of ERV and water-to-air heat
pump.</FONT></FONT></SPAN></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial><FONT
face="Times New Roman" size=2><SPAN
class=700151418-28032007></SPAN></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial><FONT
face="Times New Roman" size=2><SPAN class=700151418-28032007>In the detailed
mode, you can build a GSHP system with airside to be PVVT, PVAVS, or
PSZ. But, keep in mind, you need manually change the corresponding
parameters as discussed above. If you tend to use PVAVS system as the
airside of WLHP (though it is unusual), you'd be cautious about the
MIN-FLOW-RATIO. It should be lower than 1 to avoid overcooling the
space.</SPAN></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial><FONT
face="Times New Roman" size=2><SPAN
class=700151418-28032007></SPAN></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial><FONT
face="Times New Roman" size=2><SPAN class=700151418-28032007>Hope it
helps,</SPAN></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial><FONT
face="Times New Roman" size=2><SPAN
class=700151418-28032007></SPAN></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial><FONT
face="Times New Roman" size=2><SPAN
class=700151418-28032007>Xiaobing</SPAN></FONT></FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> BLDG-SIM@gard.com
[mailto:BLDG-SIM@gard.com]<B>On Behalf Of </B>Baugher,
Bridgette<BR><B>Sent:</B> Wednesday, March 28, 2007 11:13 AM<BR><B>To:</B>
BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM] Gshp in detailed edit
mode<BR><BR></FONT></DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial size=2>Hello -
</FONT></SPAN></DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial size=2>in eQUEST, I
understand that using a gshp is easy with the wizard, but I am now using the
detailed edit mode and it is not as simple. I have created the water
loop and the hvac system that goes along with it, but what "system type" is
appropriate to simulate a gshp? The default option is a packaged var vol
var temp unit - but the users manuals specify that PVVT, PVAVS, and PSZ
systems can be used. What is the difference between these three types,
and could the "water loop" heat pump work?</FONT></SPAN></DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial
size=2>Thanks!</FONT></SPAN></DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=515210716-28032007><FONT face=Arial
size=2>Bridgette</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV align=left><FONT face=Arial
size=2>--------------------------------------------</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Bridgette Baugher</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>2rw Consultants Inc.</FONT></DIV>
<DIV align=left><FONT size=2><FONT face=Arial><SPAN lang=en-us>100 Tenth St.
NE</SPAN><BR><SPAN lang=en-us>Suite 202</SPAN><BR><SPAN
lang=en-us>Charlottesville, VA 22902</SPAN><BR><SPAN lang=en-us>T: (434) 296 -
2116</SPAN><BR><SPAN lang=en-us>F: (434) 977 - 1862</SPAN><BR><SPAN
lang=en-us></SPAN></FONT></FONT><A title=mailto:danielc@2rw.com
href="mailto:bridgetteb@2rw.com"><SPAN lang=en-us
title=mailto:danielc@2rw.com><U title=mailto:danielc@2rw.com><FONT
title=mailto:danielc@2rw.com face=Arial color=#000000
size=2>bridgetteb@2rw.com</FONT></U></SPAN></A><BR><SPAN lang=en-us></SPAN><A
title=http://www.2rw.com/ href="http://www.2rw.com/"><SPAN lang=en-us
title=http://www.2rw.com/><U title=http://www.2rw.com/><FONT
title=http://www.2rw.com/ face=Arial color=#000000
size=2>www.2rw.com</FONT></U></SPAN></A></DIV>
<DIV> </DIV><PRE>
==================
You received this e-mail because you are subscribed
to the BLDG-SIM@GARD.COM mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@GARD.COM
</PRE></BLOCKQUOTE><PRE>
===========================
You received this e-mail because you are subscribed
to the BLDG-SIM@GARD.COM mailing list. To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE@GARD.COM
</PRE></BODY></HTML>