Coupling of Air Multizone and Thermal Multizone Models in Modelica

Building simulations are used to investigate building performance and design the building systems optimally. In particular, the air exchange between zonesand with the environment has a pivotal role inmodernventilation system design. Nevertheless, the model of the airflow becomes difficult for the modeler, motivated by the complexity of the grid that has to be modeled. IDEAS, a Modelica library, includes components for thermal multi-zone models of buildings as well as models for heating, ventilation, air conditioning and other elements that interact in the same model.

Modeling Dynamic Behavior of Volatile Organic Compounds in a Zero Energy Building

With increasing building airtightness, the design of an adequate ventilation system gains importance. The first generation of ventilation systems, based on continuous supply of the nominal airflow rate, are now being replaced by Demand Controlled Ventilation (DCV). These systems, often H2O and/or CO2 controlled, do not take into account the emissions of Volatile Organic Compounds (VOCs) to the indoor environment.