01390nas a2200121   4500008004100000245007300041210006900114260002800183300001200211520094000223100002001163856008501183       2006                        eng d00aMultizone Building Model for Thermal Building Simulation in Modelica0 aMultizone Building Model for Thermal Building Simulation in Mode  aVienna, Austriac9/2006  a517-5263 aWe present a room model for thermal building simu- lation that we implemented in Modelica. The room model can be used for controls analysis and energy analysis of one or several rooms that are connected through airflow or heat conduction. The room model can assess energy storage in the air and in the build- ing construction materials, heat transfer between the room and the outside environment and the humidity and CO2 release to the room air. The humidity storage in the building construction materials is not modeled. We also describe a novel separation of heat transfer mechanisms on which our room model is built on. The separation allowed a significant reduction in model de- velopment time, and it allows using state-of-the-art programs for computing prior to the thermal building simulation certain energy flows, such as solar heat gain of an active facade without breaking feedback loops between the HVAC system and the room.1 aWetter, Michael  uhttps://www.modelica.org/events/modelica2006/Proceedings/sessions/Session5b4.pdf