Indoor aerosol transport and deposition for various types of space heating

摘要

Computational modelling of aerosol transport under various heating systems in a room was conducted with the goal to understand and evaluate a regional deposition and to assess an optimum position for air cleaning device. The room is equipped with a ventilation inlet integrated into one of the windows. The computational model room simulates a real room in an experimental house. Three heating systems are taken into account, namely radiators, floor heating and ceiling radiation panels. In total four cases are modelled for each heating system. Thermal diversity is simulated by varying the ventilation air flow and outdoor temperatures. Aerosol entering the room has the size of particles 1, 2.5 and 10 μm diameters. The room is divided into several regions and sub-regions where the deposition is evaluated for individual aerosol sizes and outdoor and incoming air temperatures. Also the air velocity and temperature fields in the room are depicted to support the analysis of deposition patterns. The void fraction of the aerosol phase also shows the space distribution inside the room and provides us with an overall view of the aerosol transport. Based on the results of aerosol transport and deposition, an optimal location of an air cleaner can be selected.