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[EnergyPlus_Support] Re: How to integrate the simulation model with the real data

What JC has said is theoretically possible. In practice there are many hidden unknown.  Dr.Ooi used a 30 channel data logger to collect local outdoor temperature and building temperature values and not get much consistent result.  There were too many averaging in the simulation input data.

I suggested the weather file matching method, which was quite easy to use.

The question is how accurate do you expect the match, how much local data are available.

Dr.Li


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Jeremiah Crossett <jcrossett@...> wrote:
>
> Place a minimum of two sensors on the inside and outside of each surface
> then use the average. If possible have your sensors bin data in hourly
> increments and note if the data is binned to the beginning or end of the
> hour. For the outside surface use other side coefficients and a schedule to
> replace the outside average surface temps.
> 
> Use your measured weather data to modify your .EPW file, at a minimum your
> outdoor drybulb, but could also do humidity and direct solar.
> 
> Then, use an ideal loads HVAC system and use your hourly zone mean
> air temperature for setpoints.
> 
> The result would be the blend of measured and modeled data.
> 
> 
> *
> *
> *
> *
> *Jeremiah D. Crossett  | Senior Analyst  |  Phase Change Energy Solutions*
> *
> 120 E. Pritchard St.  | Asheboro, NC 27203  | Mobile 503-688-8951
> www.phasechange.com
> *
> 
> *
> *
> *
> *
> 
> 
> 
> On Fri, May 17, 2013 at 8:23 AM, Li,YuanLuæ Žåâ?¦Æ'Ã¥â?¦Â­ <yli006@...>wrote:
> 
> > **
> >
> >
> > There is no meaning in integrating any measured data into EPlus simulation
> > without the complete set of environment data.
> >
> > EPlus only has one value for a large wall, for example. Where do you place
> > the sensor to get the wall temperature?
> >
> > Dr. Ooi has investigate many cases in his PhD research. Local weather data
> > helped to provide some results.
> >
> > What you should do is to find a day in the weather file which has the same
> > (as near as possible for three OD temperature) condition as the day and
> > time when the measurements were make and then compare the values. This was
> > done by curve matching using the resultViewer.
> >
> > Hope this help
> > Dr.Li.
> >
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Yan, Ying" <yiy11005@>
> > wrote:
> > >
> > > Hello everyone,
> > >
> > > I built a simulation model of a building. Now we obtained several real
> > data from sensors installed in the building such as the temperature, the
> > humidity ratio, and etc. I want to replace part of the simulation model by
> > these real data which means the hybrid simulation model with real data will
> > get closer to the real building. My question is whether I can replace part
> > of the simulation model by real data. For instance, I knew the real data of
> > the mixed air temperature of the AHU and the discharge air temperature of
> > the AHU. How can I force these two variables to be the real data in my
> > simulation model? Thank you for giving me some suggestions!
> > >
> > > ----------------------------------------
> > > Best Regards
> > >
> > > Ying Yan
> > >
> > > Graduate Student
> > > Electrical & Computer Engineering
> > > School of Engineering
> > > University of Connecticut
> > >
> >
> >  
> >
>




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