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Define common interval of peak rate or shoulder rate in applicable schedule

asked 2016-12-02 12:11:59 -0500

rkbest gravatar image

updated 2016-12-02 16:50:13 -0500

I am creating a TimeOfDaySchedule for NewYork with summer demand rates defined in three blocks

8AM to 6PM -$8/kW 8AM to 10 PM -$15/kW All other hours of all days- $16/kW Ref- ConEd NewYork, General Large Rate-II

I know that in defining the schedule we assign intervals with the 1 for peak, 3 for off-peak and I can use 2 for the mid peak. But how to take care of the time common to peak and shoulder period both (1 or 2)?

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answered 2016-12-06 08:54:11 -0500

For that you can use the native variable called PeakAndShoulderEnergy and PeakAndShoulderDemand which can be used in the UtilityCost:Charge:Simple and UtilityCost:Charge:Block field called Source Variable. To see all the variables automatically created by EnergyPlus for tariff calculations, see the Native Variables table in each Tariff Report in the HTML file.

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Thanks, @JasonGlazer, I am aware of the tariff report variables are populated based on TimeofUse period defined in TimeofDaySchedule (Using 0,1,2,3). What my question is how to define the interval common to peak and shoulder intervals, as I can not assign '1' and '2' both for 8 am - 6 pm in schedule definition. If I assign the '1' for 8 am - 6 pm and '2' for 6 pm - 10 pm, the demand will be calculated for should peak from the half hour max demand between 6pm-10 pm @15/kW while it should be calculated for half hour max demand between 8am-10pm.

rkbest gravatar image rkbest  ( 2016-12-07 16:06:02 -0500 )edit

@rkbest If you define a schedule with:

  • 8am to 6pm as 1 (peak)
  • 6pm to 10pm as 2 (shoulder)
  • 10pm to 8am as 3 (offpeak)

the variables would show the peak demand that you need are:

  • peakDemand would be the demand for 8am to 6pm
  • peakAndShouldDemand would be the demand from 8am to 10pm
  • offPeakDemand would the demand from 10pm to 8am

In this way the schedule can have a single value but the variable shows the demand across two time periods.

JasonGlazer gravatar image JasonGlazer  ( 2016-12-08 08:21:50 -0500 )edit

Thank you! It is clear to me now.

rkbest gravatar image rkbest  ( 2016-12-08 08:48:32 -0500 )edit

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Asked: 2016-12-02 12:11:59 -0500

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Last updated: Dec 06 '16