Time-varying linear model approximation: application to thermal and airflow building simulation

Considering   the   natural   ventilation,   the   thermal behavior of buildings can be described by a linear time varying model. In this paper, we describe an implementation of model reduction of linear time varying systems. We show the consequences of the model reduction on computing time and accuracy. Finally, we compare experimental measures and simulation results using the initial model or the reduced model. The reduced model shows negligible difference  in  accuracy,  and  the  computing time shortens.