[EnergyPlus_Support] Re: How do I override a temperature sensor?

["hnoboam" <homero.noboa@xxxxxxxxx>]

OK, thanks.

Then how do I make E+ to use OAT_SENSOR_MOD value? I could not find any reference to "Outdoor Dry Bulb" in the IDF.

Homero

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Griffith, Brent"  wrote:
>
> Yes, it is circular.  This is a common problem with EMS.  Separation of sensor and actuator is usually needed.
> 
> IF you just want to modify the sensor then you can use:
> Set  OAT_SENSOR_MOD = OAT_SENSOR + 6,
> 
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of hnoboam
> Sent: Friday, January 18, 2013 11:53 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Re: How do I override a temperature sensor?
> 
> 
> 
> It shows the OAT going up by 6 degrees each time step:
> SETOAT,Line 1,SET OAT_ACTUATOR = OAT_SENSOR + 6,1.400000,
> SETOAT,Line 1,SET OAT_ACTUATOR = OAT_SENSOR + 6,7.400000,
> SETOAT,Line 1,SET OAT_ACTUATOR = OAT_SENSOR + 6,13.400000,
> 
> The simulation ends when the OAT reaches the toasties 421.4 deg C. :-)
> 
> Evidently when I read the OAT I'm not reading the original value from the weather file, but the already increased one.
> 
> Thanks for your help
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx , Richard Raustad wrote:
> >
> > What does the edd file show?
> >
> > Use:
> > Output:EnergyManagementSystem,
> > Verbose, !- Actuator Availability Dictionary Reporting
> > Verbose, !- Internal Variable Availability
> > Dictionary Reporting
> > Verbose; !- EMS Runtime Language Debug Output Level
> >
> >
> > On 1/18/2013 1:33 PM, hnoboam wrote:
> > > I would like to override a temperature sensor, for example I want to give the Outdoor Dry Bulb an offset of 6 C.
> > > So I created an EMS Sensor:
> > > EnergyManagementSystem:Sensor,
> > > OAT_Sensor, !- Name
> > > , !- Output:Variable or Output:Meter Index Key Name
> > > Outdoor Dry Bulb; !- Output:Variable or Output:Meter Name
> > >
> > > and an EMS actuator
> > > EnergyManagementSystem:Actuator,
> > > OAT_Actuator,
> > > Environment,
> > > Weather Data,
> > > Outdoor Dry Bulb;
> > > and this program:
> > > EnergyManagementSystem:Program,
> > > SetOAT, !- Name
> > > SET OAT_Actuator = OAT_Sensor + 4; !- Program Line 1
> > >
> > > But the simulation quickly ended when the OAT went out of bounds at 200+ deg C.
> > >
> > > Any advise? A different, simpler solution?
> > >
> > > Thanks
> > >
> > > Homero.
> > >
> > >
> > >
> > > ------------------------------------
> > >
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> > >
> >
> > --
> > Richard A. Raustad
> > Senior Research Engineer
> > Florida Solar Energy Center
> > University of Central Florida
> > 1679 Clearlake Road
> > Cocoa, FL 32922-5703
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>



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