Modelling and simulation of the temperature control system in the heating installations from nonresidential buildings

The article addresses specific issues of the automated heating systems for non-residential buildings, which aim to ensure thermal comfort with low energy consumption. The specialized automatic system maintains constant the indoor temperature when the heat input in building equals the heat loss through the building envelope. The specialized automatic system consists of several subsystems. The model for each subsystem is obtained considering the particularities of the heating processes from buildings and requirements for the thermal comfort. By simulating the operation of the specialized automatic system is obtained the time behavior for the main physical values that characterizes the system,_relevant to the quality of the heating temperature control in the building. The operation of the automatic controller and the control valve are analyzed by simulation, in a comparable time interval with transient regime of the automatic heating system of the real building. The validation of the model is done by comparing the results obtained by simulation with results of experimental measurements in the real automatic system, implemented in the building chosen for study.