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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Is this homework? <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Someone please correct me if I am wrong, but I believe the eQuest weather files give the same weather information for each day in a given month, i.e. every day in January will have 24 hrs of temperature data and extremes are ignored, every day in February will have a new set of 24 hrs of weather data, etc…. It is going to be tough to calibrate a model with one month of data if the data shows swings in energy use due to swings in outdoor temperature/weather. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If you had many months of data, you would need a detailed description of the building; envelope/skin, HVAC systems, domestic hot water systems, electrical systems, lighting, control sequence for all systems, building operation schedule, occupancy, trending of existing equipment would be a plus, etc… Once you have all of this information you can begin building the model to match the existing building and then once the model is finished you can run the simulation and start calibrating the model to the utility bills from there.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>As far as an acceptable limit for RMSE, it will depend on the accuracy of the information you have and the project requirements. <b><u>10%</u></b> deviation from previous bills is obtainable if you have some good experience with tweaking models and an intuition for how the results will change given a change in input. I am guessing you have to make lots of assumptions, which could be fun. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Also, you will never be able to predict future results with an acceptable level of confidence in your accuracy because of the human variable and the climate variable, we can’t predict how everyone will behave in a building and we can’t predict the weather (not even tomorrow’s weather).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Trebuchet MS","sans-serif";color:#74BD4B'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Trebuchet MS","sans-serif";color:#74BD4B'>Joe Fleming, E.I., LEED AP BD+C, BEMP<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Vipin Sharma<br><b>Sent:</b> Thursday, April 14, 2011 5:38 AM<br><b>To:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> [Equest-users] problem with calibration<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0><tr><td valign=top style='padding:0in 0in 0in 0in'><p class=MsoNormal>hi...............<br> <br> I have one month energy consumption data. How can I calibrate it with simulated <br> data by eQUEST. .I don't have hourly data . I have only daily energy consumption data.How can I calculate MBE and CVRMSE. What are the monthly<br> and hourly acceptable limits for these indices. From where I can find <br> acceptable limits for these indices.Thanks in advance .<br><br><br><br>vipin sharma<br>student<br>Energy Engg.<o:p></o:p></p></td></tr></table><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p></div></body></html>