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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi All,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I can’t figure out what eQUEST is doing with some DHW
loads that I’ve assigned to several DHW loops. I’ve got 8
water heaters that are also serving as space heat, providing hot water to coils
in PTAC systems. I’ve divided a PROCESS-FLOW for DHW proportionally
to all of these via a global parameter. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>At higher flows (like 66 gpm building-wide), all of the
PROCESS-FLOW shows up as hot water gas consumption. Fine. But at
somewhat lower flows (45 gpm), the consumption gets split up about half and
half between hot water and “misc. equip.” At even lower flows
(20 gpm), the hot water consumption disappears and only the miscellaneous equip.
consumption remains. Any idea why? <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’ve tried assigning this same flow to a separate
water heater that is not serving any space heat loads, and the effect is
absent. Overall, the combined gas use for the misc. equip. and hot water
are the same for the two schemes. In addition, space heat gas consumption
is the same in all cases, telling me that the process flow has nothing to do
with the space heat. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>What is it about the PROCESS-FLOW on a combined space-heat /
hot-water heater that makes this happen? <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>***********</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Sean Maxwell</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Energy Performance Analyst</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Conservation Services Group</span></font><o:p></o:p></p>
<p class=MsoNormal><st1:address w:st="on"><st1:Street w:st="on"><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>40 Washington St.</span></font></st1:Street><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <st1:City
w:st="on">Westborough</st1:City>, <st1:State w:st="on">MA</st1:State> <st1:PostalCode
w:st="on">01581</st1:PostalCode></span></font></st1:address><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>C: 508-328-2603 ph: 508-836-9500
x13230 fx: 508-836-3181</span></font><o:p></o:p></p>
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