[EnergyPlus_Support] Re: New Variable Speed Heat Pump Coil Coefficients

["luke_dorna" <luke.dorna@xxxxxxxxx>]

I noticed in the example file VSHeatPumpWaterToAirEquationFit.idf that the same performance functions were used at all ten speeds on the coils. Is this appropriate, or should they be varied according to the values in the cut sheets at those particular speeds? 

I also noticed that 10 was selected as the nominal speed that should correlate to the rated value of the coil. However, the rated air and water flows at speed 10 don't match the rated flows of the whole system. Am I misunderstanding that field?


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Linda Lawrie <linda@...> wrote:
>
> There are always example files for each feature.
> 
> And sometimes datasets that have additional curves, etc.
> 
> At 09:42 AM 7/19/2012, luke_dorna wrote:
> >All,
> >
> >I'm very excited about the new heat pump units that allow for 
> >variable speed operation that comes with v7.1. I have a model I'm 
> >working on that I've been kind of fudging for a year.
> >
> >There was an excel macro sheet that used to be available on the 
> >helpserve site to help derive the performance coefficients for the 
> >single speed versions. Does something like this exist for the new 
> >variable speed objects yet?
> >
> >Coil:Cooling:WaterToAirHeatPump:VariableSpeedEquationFit
> >Coil:Heating:WaterToAirHeatPump:VariableSpeedEquationFit
> >
> >If not, is there at least an example derivation of these curves from 
> >some dummy data so I can make sure I'd be doing this correctly? Is 
> >there a nominal amount of data point that should exist in each of 
> >these performance curves?
> >
> >
> >Thanks,
> >
> >
> >Luke
> >
> >
> >
> >
> >
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>



------------------------------------

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