Abstract: A system and method for forecasting energy usage load for a facility includes a server having a load forecasting application, which includes 1) a parameter identification module for determining periodic energy load usage of the facility and 2) a load prediction module for generating energy usage load forecast profiles for the facility. The load forecasting application may include a database for storing information and a report module for generating energy usage load forecast profiles. The database may include a first set of matrices associated with the parameter identification module for storing periodic energy usage load parameter information, and a second set of matrices associated with the load prediction module for storing energy usage prediction information. The first set of matrices may include a matrix for storing coefficients for determining periodic changes in energy load usage, and a model parameter matrix for storing load parameter information.

Abstract: A method of controlling a device for producing or removing heat for the purpose of regulating the inside temperature of premises to comply with at least one reference q given in advance, in which, at each time instant that is separated from the following instant by a time interval .DELTA.t, a function J(u) is minimized over a duration T0 where J(u) characterizes the behavior of the inside temperature Ti of the premises, with:J(u)=.intg..sub.t.sup.t+T0 {qe.sup.2 +ru.sup.