Question-and-Answer Resource for the Building Energy Modeling Community
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In my interpretation of the rate, if the peak demand was in June at 2pm on a Wednesday, and low-tension service is being used, then the demand charge would be (8.03 + 15.03 + 16.12) times the peak demand. If the peak demand for January was set at 2pm on a Wednesday and low-tension service is being used, then the demand charge would be (11.08 + 5.17 ) times the peak demand. It is important to understand the timing of the peak demand and if the monthly peak does not occur during 8am to 6pm, then the peak during that particular period needs to be used for computing that portion of the demand charge and the same goes for 8am to 10pm.
The Time of Use Period Schedule Name field should identify a schedule that for the summer months uses 1 for the 8am to 6pm times to represent the peak hours, 2 for the 6pm to 10pm times to represent the shoulder hours and 3 all other hours. Then use UtilityCost:Charge:Simple of 8.03 with a Source Variable of PeakDemand and another UtilityCost:Simple of 15.03 with a Source Variable of PeakAndShoulderDemand and a third UtilityCost:Charge:Simple of 16.12 with a source Variable of TotalDemand. The energy cost would be computed using a UtilityCost:Charge:Simple of 0.0080 with a source variable of TotalEnergy. A similar approach would be used for the winter demand charges.
I don't think you will need the offPeakDemand variable.
