Development of a Compartment Model for the Simulation of Thermal Processes in Production Halls

This paper discusses the development of a compartment model for the simulation of thermal processes in a building using the object-oriented programming standard Modelica. The distribution of the temperature within a room is of special interest. One of the main tasks in this work was the successful realization of convection, since the Modelica modelling approach doesn´t allow to actually model movement of air packages. Since the walls, roof and floor of the building also have to be part of the building model, this work starts with the description of a solid compartment where heat transfer takes place only via conduction. For the air compartment model, convection formulae for even surfaces and polynomial regression for temperature dependent parameters have been used to calculate the convectional heat transfer coefficient for each compartment surface. A comparison with a real experiment shows the validity of the developed model. To further demonstrate the applicability of the developed room model, an example with the inclusion of a DC motor in the room model is shown.