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Using multiple peak demand charges

   
  Applies To 
   
  Product(s): Bentley WaterCAD, WaterGEMS
  Version(s): 08.11.04.58+
  Environment:  N/A
  Area:  Modeling
  Subarea: 
  Original Author: Jesse Dringoli, Bentley Technical Support Group
   

 

Problem

What are the assumptions behind the "Multiple Peak Demand Charge" feature? Why doesn't it appear to work in the Scenario Energy Cost tool? What do I need to enter for the peak demand charge and billing period in the Energy Pricing window if I'm using multiple peak demand charges table?

Solution

Multiple Peak Demand Charges are currently only supported with the Energy Management tool, not the Scenario Energy Cost tool. The Peak demand charge is typically only considered on a peak day and then is fixed for the rest of the period. The scenario energy cost tool is more oriented to the more typical day. The Energy Management tool also lets you specify which pumps are in a Power Meter, then the peak demand charge is applied on a per-power meter basis.

If you're using Multiple Peak Demand Charges for energy management, the "Peak Demand Charge" and "Billing Period" in the Energy pricing manager under the "Include Peak Demand Charge?" check box are ignored. If you will also use the Scenario Energy Cost, you may still want to populate these two fields, as they are still used in the Scenario Energy Cost tool.

When entering Clock Time in the multiple peak demand charge table, you can enter any contiguous time range. For example 10 PM to 2 AM or 2 AM to 1 PM, etc. Take care not enter overlapping time ranges (for example 10 PM to 2 AM and 1 AM to 6 AM).

See Also

Multiple Peak Demand Charge section of the Energy Cost Analysis Technote

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