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<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=807340918-21032007>For
HIR you want the design fuel input and usable heat output, you won't want to
compare it to any measure of efficiency over time. </SPAN></FONT><FONT
face=Arial color=#0000ff size=2><SPAN class=807340918-21032007>HIR = 1.67 is
more like boiling water in a pot over an open fire. Keep trying the
manufacturer for a design fuel input rate. Energy factor is based on using
64 gallons DHW per day and includes standby losses.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=807340918-21032007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=807340918-21032007><A
href="http://www.aceee.org/consumerguide/topwater.htm">http://www.aceee.org/consumerguide/topwater.htm</A></SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=807340918-21032007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=807340918-21032007>HIR
applies to many types of equipment where a storage tank (and losses) may or may
not be part of the system. As you suggest, the tank losses can be treated
separately.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=807340918-21032007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=807340918-21032007>Also,
if you make an edit to the HIR, then it will appear in the input file.
Many items that are left to eQuest defaults will not appear in the input file
unless the default is overridden.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=807340918-21032007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=807340918-21032007>Hope
this helps!</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=807340918-21032007></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=807340918-21032007>David</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT><BR> </DIV>
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<FONT face=Tahoma size=2><B>From:</B> BLDG-SIM@gard.com
[mailto:BLDG-SIM@gard.com] <B>On Behalf Of </B>tim<BR><B>Sent:</B> Wednesday,
March 21, 2007 12:52 PM<BR><B>To:</B> BLDG-SIM@gard.com<BR><B>Subject:</B>
[BLDG-SIM] eQuest DHW Tank HIR<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>Utilizng eQuest, under the DHW Equipment tab in wizard mode, the user can
enter the usual characteristics: storage capacity, hot water usage, supply
temp, input rating, etc.</DIV>
<DIV> </DIV>
<DIV>If you click on the DHW icon under the water-side HVAC tab you will see a
default HIR number under "equipment eficiency" for the tank, it seems
always to be 1.37 (~73% efficiency). Oddly, this number does not appear
in the input file. though you can change it in Parametric Runs
to examine different DHW efficiencies. Question: </DIV>
<DIV> </DIV>
<DIV>-Gas water heaters are typically rated with an EF, and Energy Factor,
essentially an efficiency rating. However, this number is usually
between .5 and .7, with most being around .6--(This would translate
to an HIR of 1.67). </DIV>
<DIV>Does anyone know the relationship b/w eQuest's HIR and actual models
EF? In order to compare different models of water heaters, should I make
this HIR equal to the EF of the current model and then chane the number for
newer more efficent models? Or I wonder if the manufacturer-rated EF includes
standby/tank UA losses and that is why it is lower than the HIR in eQuest, wh/
is separate from the standby loss calc. </DIV>
<DIV> </DIV>
<DIV>Any thoughts/experience would be great..</DIV>
<DIV> </DIV>
<DIV>thanks</DIV>
<DIV>tim</DIV></BLOCKQUOTE><PRE>
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