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System and method for determining energy and greenhouse gas (GHG) apportionment

  • US 10,282,794 B2
  • Filed: 08/27/2014
  • Issued: 05/07/2019
  • Est. Priority Date: 08/28/2013
  • Status: Active Grant
First Claim
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1. A method, operable in a processor, for apportioning energy costs for equipment operation, said method causing said processor to execute the steps comprising:

  • receiving, from at least one sub-meter, at least one energy usage and an energy demand corresponding to each of said at least one energy usage during a known period;

    receiving, from a master-meter, a total energy usage and a corresponding total energy demand during said known period;

    determining a residual energy usage from said total energy usage and said at least one energy usage and a residual energy demand from said total energy demand and said energy demand corresponding to each of said at least one energy usage;

    determining a maximum energy demand over said known period, wherein said maximum energy demand is a maximum of an average value of said energy demand corresponding to each of said at least one energy usage determined in each of a plurality of second known periods;

    determining a maximum total energy demand over said known period wherein said maximum total energy demand is a maximum of an average value of said received total energy demand determined in each of said plurality of second known periods;

    determining a cost of said total energy usage based on at least said total energy usage and said maximum total energy demand;

    determining a cost of said residual energy usage based on at least said determined residual energy usage and said maximum residual energy demand;

    apportioning said energy costs of equipment operation based on said cost of said total energy usage and said cost of said residual energy usage; and

    determining a source of energy generation of said total energy usage and each of said at least one energy usage;

    retrieving a greenhouse gas (GHG) emission value associated with the source of generation of said total energy usage and each of said at least one energy usage;

    determining an effective emission factor based on the determined sources of energy generation; and

    determining the GHG emission based on the effective emission factor.

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