Multi-facility energy management system

A computing device having computer executable instructions embodied in a non-transitory storage medium, the device comprising:

• computer readable program code for providing an apparatus for managing energy consumption of one or more buildings of one or more building types based on occupancy, said computer readable code comprising:
• first program code for providing an occupancy estimator, configured to receive energy consumption and outside temperature streams Ei(h,T) corresponding to a portion of the one or more buildings, and configured to receive occupancy components from occupancy stores, and configured to employ said occupancy components for each of the one or more buildings within said portion to process said streams, and configured to generate occupancy levels corresponding to the one or more buildings within said portion, wherein said occupancy components and said occupancy levels are generated by exclusively processing said streams, and configured to assign said occupancy levels to remaining ones of the one or more buildings not in said portion according to building type, said occupancy components comprising:
• a lower bound of energy consumption ζ(T) as a function of outside temperature T when a corresponding one of said one or more buildings is at minimum occupancy;
• a normalized occupancy profile component ƒ(h) as a function of a prescribed time increment h;
• a marginal energy consumption component D(T) as a function of T;
• and
• a daily occupancy level component γi for each of a first plurality of days i;
• wherein γi is determined according to the following equation:
• γ
• i
• =
• ∑
• h
• 
• Δ
• i
• 
• (
• h
• ,
• T
• )
• ∑
• h
• 
• f
• 
• (
• h
• )
• 
• 
• D
• 
• (
• T
• )
• ;
• and wherein Δi(h,T)=Ei(h,T)−ζ(T);
• and
• second program code for providing a multiple facility controller, configured to employ said occupancy components to maintain a global energy use model for the one or more buildings, and configured to transmit energy reduction control messages to selected ones of the one or more buildings to reduce energy consumption by a prescribed amount for a prescribed period of time, thereby optimizing energy consumption of all of the one or more buildings.

A method for managing energy consumption of one or more buildings of one or more building types based on occupancy, the method comprising:

• receiving energy consumption and outside temperature streams Ei(h,T) corresponding to a portion of the one or more buildings, and receiving occupancy components from occupancy stores, and employing the occupancy components for each of the one or more buildings within the portion to process the streams, and generating occupancy levels corresponding to the one or more buildings within the portion, wherein the occupancy components and the occupancy levels are generated by exclusively processing the streams, and assigning the occupancy levels to remaining ones of the one or more buildings not in the portion according to building type, the occupancy components comprising:
• a lower bound of energy consumption, ζ(T), as a function of outside temperature T when a corresponding one of said one or more buildings is at minimum occupancy;
• a normalized occupancy profile component ƒ(h) as a function of a prescribed time increment h;
• a marginal energy consumption component D(T) as a function of T;
• and
• a daily occupancy level component γi for each of a first plurality of days i;
• wherein γi is determined according to the following equation:
• γ
• i
• =
• ∑
• h
• 
• Δ
• i
• 
• (
• h
• ,
• T
• )
• ∑
• h
• 
• f
• 
• (
• h
• )
• 
• 
• D
• 
• (
• T
• )
• ;
• and wherein Δi(h,T)=Ei(h,T)−ζ(T);
• and
• optimizing time of use energy consumption by employing the occupancy components to maintain a global energy use model for the one or more buildings to achieve time of use energy consumption objectives, and transmitting energy reduction control messages to selected ones of the one or more buildings to reduce energy consumption by a prescribed amount for a prescribed period of time, thereby optimizing the time of use energy consumption of all of the one or more buildings.