ABSTRACT

It is well known rain precipitation influence energy demand and room climate. To analyze dynamic behaviors of room climate under rain precipitation, they should be considered as coupling phenomena of heat and moisture transfer. In this paper, in the first place, to clarify thermal and moisture performance of buildings under rain precipitation, variations of room climate without air conditioning system, that is natural room climate, are analyzed. Effects of rain precipitation on room climate and moisture state in building elements are shown. Effects on thermal and moisture states are clear and continue several months after rain precipitation. Effects of moisture uptake by partition, wall on room climate are apparent, 'though partition wall is kept in almost hygroscopic range. The result shows the importance of moisture uptake effects of wall to damp relative humidity variations of room. Those damping effects is effective on

6ail~ aild Shorter petio(i. of effects of air change rate between outdoor air and room air, we discussed quantitatively . Furthemore,

variations of room climate, controlled room temperature and relative humidity, with intermittent air conditioning system are analyzed under rain precipitation. After rain precipitation, sensible heat load decreases and latent heat load increases, As a result, total heat load increases, compared with those before. Effects on heat load continue more than two weeks

• numerical method in heat and moisture transfer : models rain precipitation on moisture absorbing wall
• rain on walls, rain precipitation : dynamic behavior of room climate with air conditioning system
• rain on walls, rain precipitation : moiture absorbing wall with rain precipitation

1. A study of heat and moisture behavior of an underground space - effects of wall structure