AIVC - Air Infiltration and Ventilation Centre

Search form


You are here

Home  |  ventilation effectiveness

Numerical simulation on transient accessibility of supply air and contaminant source in ventilated room

Xiaojun Ma, Jiujiu Chen, Fenfei Zhu, Xiaoliang Shao, Xianting Li, 2009
ventilation effectiveness | Transient accessibility | computational fluid dynamics | validation
Bibliographic info: Building Simulation, 2009, Glasgow, Scotland
Languages: English

The transient accessibility of supply air (TASA) and transient accessibility of contaminant source (TACS) in ventilated rooms are important indices to evaluate the effect of ventilation and the indoor air quality (IAQ). These indices can be measured by experimental method or calculated with computational fluid dynamics (CFD) tools. Compared to the measurement method, the numerical method has a lot of advantages such as fast, flexible and with detailed data. In this paper, the calculation and validation of the TASA and TACS are introduced. A typical ventilated room, which is 4m long, 3m wide and 2.5m high, is taken as the example to be calculated. The values of TASA and TACS in the room are obtained by numerical simulation with two kinds of ventilation modes. The two ventilation modes are, upper-wall-supply and lower-wall-exhaust, and, floor-supply and ceiling-exhaust, which are the typical mixing ventilation and underfloor ventilation. By comparing the numerical results with the measurement data, the numerical method is validated. Furthermore, the two typical ventilation modes are evaluated by using the series indices of TASA and TACS obtained by the numerical method. It is shown that the indices are feasible of application.  

Related publications

This report summarizes the work of the initial working phase of IEA ECB Annex 62 Ventil
Maria Kolokotroni, Per Heiselberg, Lorenzo Pagliano, Jie Han, Regina Bokel, Peter Holzer, Annamaria Belleri, Denmark
This summary report presents insights on recommendations into how ventilative cooling i
Christoffer Plesner, Flourentzos Flourentzou, Guoqiang Zhang, Hilde Breesch, Per Heiselberg, Michal Pomianowski, Peter Holzer, Maria Kolokotroni, Annamaria Belleri, Denmark
Overheating in buildings is an emerging challenge at the design stage and during operat
Peter Holzer, Theofanis Psomas, Denmark