The present report describes the method used for the computation and integration of the energy system which has been built within this semester. All the supplying energy technologies , which have been taken into account are presented. The fundamental equations used during the implementation of the utility models are showed and all the respective references are added. A description of the OSMOSE Lua platformis included focusing on the adopted solving method. The optimization of the energy supplying system is performed on an entire district, thanks to the concept of location. Information coming from different scales (building and district) will be used in order to achieve the goal.