Ensuring the comfort in the heated space by controlling the temperature in the heating installation of a non-residential building

In this article is modeled, with the help of Simulink, the automatic system that controls the thermal agent temperature in a non-residential building chosen for study. It describes how the model has been drawn for the subsystem entitled HEATED SPACE in the building. There were used mathematical relationships which show how the indoor temperature is changing, depending on the heat input in building and the heat loss through building envelope. The other subsystems have been modeled in the articles specified in the bibliography. By simulation of the model for the automatic system is determinated his behavior during two days in the winter season. The evaluation of the thermal comfort in the heated space from the building, ensured by using the automatic system, is made by analyzing the graphs of the significant temperatures from the modeled system: indoor temperature, outdoor temperature and thermal agent temperature in the heating installation. At the end of the article are shown the main causes of low thermal comfort in the building, and also the reasons why this type of automatic system is preferred in many non-residential buildings.