<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="MS Exchange Server version 08.00.0681.000">
<title>RE: [Bldg-sim] Calibrated Simulations & ASHRAE G14</title>
</head>
<body>
<p dir="LTR"><span lang="en-us"><font face="Consolas">There are probably occupancy variations that took place in the house that cause variance in the energy usage for the measured case, and it may be difficult for you to capture those effects in the model.</font></span></p>
<p dir="LTR"><span lang="en-us"></span><span lang="en-us"><font face="Consolas">Other building occupancies (commercial, institutional, etc.) stick more closely to their typical usage patterns and the benchmark CV should be achievable in most cases.</font></span><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">It should be for residential also if you have enough data about the usage to tailor the operating schedules.</font></span><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">You might want to start out with a gas usage and HDD regression to identify if there are any months that jump out as atypical from your modeling, irregular usage periods, etc.</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">DHW could be significant also, maybe you can get water usage data for the house to see if there were periods when occpuants were using more showers/sinks/laundry/etc.</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">One other idea might be to see how sensitive the CV is to the measured ACH, which could vary during times of the year, not sure if your measurement covered multiple data points (summer/winter/occpupied/unoccupied).</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">Hope this helps!</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">David</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas"> </font></span></p>
<p dir="LTR"><span lang="en-us"></span><span lang="en-us"><u></u></span><u><span lang="en-us"><font color="#000000" face="Calibri"> </font><font color="#000000" face="Calibri"></font></span></u><span lang="en-us"></span><span lang="en-us"> </span></p>
<p dir="LTR"><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><font color="#000000" size="1" face="Calibri"> </font></span><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><b></b></span><b><span lang="en-us"></span></b><b><span lang="en-us"><font color="#1F497D" face="Calibri">David S. Eldridge, Jr.</font></span></b><span lang="en-us"><b></b></span><b><span lang="en-us"></span></b><b><span lang="en-us"><font color="#244061" face="Calibri">, P</font></span></b><span lang="en-us"><b></b></span><b><span lang="en-us"><font color="#1F497D" face="Calibri">.</font></span></b><span lang="en-us"><b></b></span><b><span lang="en-us"></span></b><b><span lang="en-us"><font color="#244061" face="Calibri">E</font></span></b><span lang="en-us"><b></b></span><b><span lang="en-us"><font color="#1F497D" face="Calibri">.</font></span></b><span lang="en-us"><b></b></span><b><span lang="en-us"></span></b><b><span lang="en-us"><font color="#244061" face="Calibri">, LEED AP BD+C, BEMP, BEAP, HBDP</font></span></b><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><font color="#1F497D" face="Calibri">Project Manager</font></span><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><font color="#1F497D" size="1" face="Calibri"> </font></span><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><font color="#365F91" face="Calibri">Direct: (847) 316-92</font></span><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><font color="#1F497D" face="Calibri">24</font></span><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><font color="#365F91" face="Calibri"> | Fax: (</font></span><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><font color="#1F497D" face="Calibri">847</font></span><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><font color="#365F91" face="Calibri">)</font></span><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"> <font color="#1F497D" face="Calibri">328</font></span><span lang="en-us"></span><span lang="en-us"><font color="#365F91" face="Calibri">-</font></span><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><font color="#1F497D" face="Calibri">4550</font></span><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><font color="#1F497D" face="Calibri"> </font></span><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><b></b></span><b><span lang="en-us"></span></b><b><span lang="en-us"><font color="#244061" face="Calibri">Grumman/Butkus Associates</font></span></b><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><font color="#808080" face="Calibri"></font></span><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"> <font color="#365F91" face="Calibri">| 820 Davis Street, Suite 300 | Evanston, IL 60201</font></span><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><font color="#808080" face="Calibri">Energy Efficiency Consultants and Sustainable Design Engineers</font></span><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><u></u></span><u><span lang="en-us"><font color="#000000" face="Calibri"> </font><font color="#000000" face="Calibri"></font></span></u><span lang="en-us"></span><span lang="en-us"> </span></p>
<p dir="LTR"><span lang="en-us"></span><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">-----Original Message-----<br>
From:</font></span><span lang="en-us"> </span><a href="mailto:bldg-sim-bounces@lists.onebuilding.org"><span lang="en-us"><u><font color="#0000FF" face="Consolas">bldg-sim-bounces@lists.onebuilding.org</font></u></span><span lang="en-us"></span></a><span lang="en-us"><font face="Consolas"></font></span><span lang="en-us"> </span><a href="mailto:[mailto:bldg-sim-bounces@lists.onebuilding.org]"><span lang="en-us"><u><font color="#0000FF" face="Consolas">[mailto:bldg-sim-bounces@lists.onebuilding.org]</font></u></span><span lang="en-us"></span></a><span lang="en-us"><font face="Consolas"> On Behalf Of Hayes Zirnhelt<br>
Sent: Wednesday, January 04, 2012 4:27 PM<br>
To:</font></span><span lang="en-us"> </span><a href="mailto:bldg-sim@lists.onebuilding.org"><span lang="en-us"><u><font color="#0000FF" face="Consolas">bldg-sim@lists.onebuilding.org</font></u></span><span lang="en-us"></span></a><span lang="en-us"><br>
<font face="Consolas">Subject: [Bldg-sim] Calibrated Simulations & ASHRAE G14</font></span></p>
<p dir="LTR"><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">Hi,</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">Does anyone have experience with calibrated simulations? Especially, in accordance with ASHRAE guideline 14, or other standards / guidelines.</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">I've been working on a calibrating and EnergyPlus model to measured gas HVAC data for a single family house with extensive monitoring and detailed information available and I am finding it very difficult to achieve the <= 30% CV RSME that Guideline 14 suggests.</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">I'm surprised that it is this challenging because I have far more information available than what would likely be available in typical modelling jobs. Eg. ACH rating, measured ground temperature data, full as-built plans, indoor temperature measurements....</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">So I'm curious to hear about anyone else's experiences with this. Is this guideline generally achievable for modellers? </font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">Thanks,</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">Hayes Zirnhelt</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas"><a href="http://M.A.Sc">M.A.Sc</a> Candidate, RU Building Science</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas"><a href="http://B.A.Sc">B.A.Sc</a> Integrated Engineering</font></span></p>
<p dir="LTR"><span lang="en-us"></span><a href="mailto:hayes.zirnhelt@ryerson.ca"><span lang="en-us"><u><font color="#0000FF" face="Consolas">hayes.zirnhelt@ryerson.ca</font></u></span><span lang="en-us"></span></a><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">_______________________________________________</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">Bldg-sim mailing list</font></span></p>
<p dir="LTR"><span lang="en-us"></span><a href="http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org"><span lang="en-us"><u><font color="#0000FF" face="Consolas">http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org</font></u></span><span lang="en-us"></span></a><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Consolas">To unsubscribe from this mailing list send a blank message to</font></span><span lang="en-us"> </span><a href="mailto:BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG"><span lang="en-us"><u><font color="#0000FF" face="Consolas">BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG</font></u></span><span lang="en-us"></span></a><span lang="en-us"></span></p>
</body>
</html>