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[EnergyPlus_Support] Re: Direct evaporative cooler and EMS

Thanks Brent. 

That would work well but I apparently misunderstood the nature of a calibrated model and its use. I now know I need to use the DirectCooler:ResearchSpecial object in conjunction with EMS. I've found an equation through regression for effectiveness of my direct cooler. I'm hoping that saturation effectiveness in this object is available as an actuator, but I haven't the slightest idea how to go about writing erl code, what objects to add, etc, despite staring at the application guide for days. 

Any guidance is greatly appreciated. Thanks!

Mat

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Griffith, Brent"  wrote:
>
> Yes, that would be relatively easy to do.  You can schedule the supply air temperature setpoint with a SetpointManager:Scheduled object that places a temperature setpoint at the cooler outlet node.    You can do the same to put a setpoint on the mixed air node.
> 
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of mskrieske
> Sent: Tuesday, January 22, 2013 12:06 PM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Re: Direct evaporative cooler and EMS
> 
> 
> 
> Thanks Brent. One more idea I had in order to avoid using EMS...
> 
> What if I use the DirectCooler:ResearchSpecial object? Which I think allows the cooler to control the amount of cooling based on node setpoints with a setpoint manager. The cooler effectiveness field assumes that the effectiveness is constant. So I assume the effectiveness (or actual cooling) varies based on the mixed air temperature (cooler input), and adjusts the cooling based on supply air temperature (cooler output) determined by another setpoint manager. Will the new setpoint manager correspond with the sensor node field? (mixed air or supply air?) According to documentation, the sensor node is updated by the setpoint manager with "system air temperature setpoint" information. I'm just not sure what temperature is being referred to here..
> 
> My goal is to use Schedule:File with yearlong supply and mixed air temps to simulate actual cooler performance.
> 
> Thanks a lot for your help!
> 
> Mat
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx , "Griffith, Brent" wrote:
> >
> > Sorry, there is no actuator available for pad thickness in the native EnergyPlus cooler models. The way to do this is to roll your own direct cooler model in EMS using a Coil:UserDefined object instead of an EvaporativeCooler:Direct object.
> >
> >
> > From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx ] On Behalf Of mskrieske
> > Sent: Friday, January 18, 2013 5:35 PM
> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx 
> > Subject: [EnergyPlus_Support] Direct evaporative cooler and EMS
> >
> >
> >
> > New to forums in general, pardon me.
> >
> > I'm simply trying to find out if direct pad thickness is available to use as an actuator.
> >
> > I'm unsure which objects to add in order to output an .edd file to check, and how to fill in the required fields.
> >
> > The end game will be to input measured data in the form of saturation effectiveness, as direct pad thickness, using the EMS feature. Thsi is possible, right? The goal is to obtain a calibrated model with actual cooler performance data for the run period, rather than a fixed thickness.
> >
> > Thanks for reading!
> >
>




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