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NUMERICAL ANALYSIS ON HUMIDITY DISTRIBUTION IN A VENTILATED ROOM

Iwamae, A., 2007
Moisture buffering effect | air movement | CFD | Heat | moisture
Bibliographic info: The 6th International Conference on Indoor Air Quality, Ventilation & Energy Conservation in Buildings IAQVEC 2007, Oct. 28 - 31 2007, Sendai, Japan
Languages: English

We already have had theoretical model to predict temperature and humidity variations in a room. Manyworks have estimated the accuracy of the numerical model, but they might be influenced by the airmovement. Thus, theoretically the temperature and humidity variations should be solved with airmovement in a room. In this paper, I calculated the minute temperature and moisture distributions in aroom which has the moisture buffering effects by the porous walls. The room space is regarded asrectangular box which has two hole, inlet and outlet for ventilation. A humidifier set on the floor and itstarts to add moisture at a point in time. First I calculated the steady air velocity distribution by CFD. Itried two turbulent models, such as standard k-e 2 equations and low-Re model. Then, I calculated theheat and vapor transport process in walls and a space. As results, it was shown that moisturedistribution is not negligible. Many works depend on instantaneous diffusion, but this hypothesis shouldbe validated. Also I got the humidity difference which depends on the turbulent model.


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