Space heating and ventilation 3D-simulation for an office room

In order to study thermal conditions and air flows in a 4 m x 5 m x 3.5 m (height) size office room, 3D FEM simulation model was created. The room is enclosed by walls, floor and ceiling which thermal characteristics are specified by typical heat transfer coefficients and specific heat capacities. Space heating is generated by an electric heater which control is based on on/off-controller and a temperature sensor. Air ventilation is based on constant air flow which volumetric speed is set by the requirements of the national building code. Non-uniformity of room temperature and air conditioning cause discomfort of occupants and loose of energy efficiency. Multiphysics simulation combining thermal and CFD simulations may reveal possible thermal imbalance and undesirable air flows in the room.