Modeling of the RHC system with Bond Graphs approach
Journal of Thermal and Environmental Engineering
In this work, a simplified graphical modeling tool, which in some extent can be considered in halfway between detailed physical and Data driven dynamic models, has been developed. This model is based on Bond Graphs approach. This approach has the potential to display explicitly the nature of power in a building system, such as a phenomenon of storage, processing and dissipating energy such as Heating, Ventilation and Air-Conditioning (HVAC) systems. In this paper, thermal behavior of an elementary referential building configured with two similar adjacent spaces has been modeled in order to assess the performance of the combined Radiant Heating and Cooling (RHC) systems. The thermal simulation of the building has been performed by using the Bond Graphs modeling approach, where both temperatures and heat flux annual profiles, according to the radiative heat exchange, have been calculated. Comparison with TRNSYS software results has also been made. It was found that the RHC system is able to meet energy demand of the building insuring a good thermal comfort level.