<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>It would be easier to see you .PD2 and .INP file. How do we know your space heating is correct?</DIV>
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<DIV>John Aulbach<BR></DIV>
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<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Maudud Quazi <tauhid80@gmail.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> bldg-sim@lists.onebuilding.org<BR><B><SPAN style="FONT-WEIGHT: bold">Cc:</SPAN></B> f.rad@cleanenergy.ca<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Sun, November 21, 2010 10:51:29 AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Bldg-sim] eQuest domestic hot water energy consumption<BR></FONT><BR>
<DIV>Hello all,</DIV>
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<DIV>Hopefully most of you have experience with modelling domestic hot water system in eQuest. First of all, according to Natural Resource Canada, the annual Domestic Hot Water (DHW) heating consumption for residential apartment buildings are about 15-20% of the total heating load. </DIV>
<DIV>I have recently model a DHW, where my water heating load was 5 times the space heating load,which I found very unusual. I sized the water storage and boiler based on ASPE table, which specifies hot water flow rate in the fixtures. I also multiplied the load with a demand factor of 0.30 and storage with a factor of 1.25. I set the process flow rate by dividing the demad with 60 (hourly demand/60 = GPM). Design water temperature was set at 120 F. Recirculation rate was 8 GPM. Have I made any mistake? Should I have set the process flow rate at something else other than just dividing the GPH by 60? I would really appreciate if someone can answer it. Thanks all in advance.</DIV>
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<DIV>Regards,</DIV>
<DIV>Hassan Quazi</DIV></DIV></DIV></div><br>
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