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[EnergyPlus_Support] Re: Energy Tariff definitions
I use PeakDemand but that's it. I work for a University and our Demand is billed at the central plants so trying to determine how a single building is going to affect campus demand is a bit abstract. I assume that a building will affect campus demand from May through September but our summer peak is so much greater than our winter peak (where our utility dings us at 65% of peak) that we do not see peak demand savings during those months.
But from what I can tell the peak demand object works fine.
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Jim Dirkes <jim@...> wrote:
>
> Dear forum,
> I am trying to verify energy cost differences between:
>
> * a 90.1 Baseline model which has all of its energy use calculated using the UtilityCost:Tariff and UtilityCost:Charge:Simple objects
>
> * and a Proposed system that E+ cannot model directly and requires some meter data post-processing - and therefore cannot calculate energy costs directly
>
> Energy charges match nicely, but demand charges do not.
> I tried using my own perception of what the various demand types mean, but cannot reconcile the E+ calculations with my spreadsheet calculations - my calculations differ by 10-15% from those of E+. That led me to investigate more carefully the definitions for the various demand types, but I could not find any definitions.
>
> Have any of you attempted the same and succeeded in reconciling E+ and hand calculations?
> Is there a definition set somewhere that I have missed?
> Thanks in advance!
>
> I would like to have definitions of:
>
> 1. PeakDemand
>
> 2. ShoulderDemand
>
> 3. OffPeakDemand
>
> 4. MidPeakDemand
>
> 5. TotalDemand
>
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