A study of heat and moisture behavior of an underground space - effects of wall structure
Ogura, D., Matsushita, T. and Matsumoto, M.
1995 International Symposium On Moisture Problems In Building Walls, Porto - Portugal, 11 - 13 September, pp. 22
Ogura, D., Matsushita, T. and Matsumoto, M., (1995), "A study of heat and moisture behavior of an underground space - effects of wall structure", International Symposium On Moisture Problems In Building Walls, Porto - Portugal, 11 - 13 September, pp. 22.
Abstract:
In this study, we present a mathematical model for analysis of thermal and hygric behavior of the underground space, taking into account coupled heat and moisture transfer in/on the ground. in the model, effects of the precipitation and the location of water table which affect considerably on moisture and thermal fields in the surrounding ground are considered. Using the model, heat and moisture behavior of the underground space are discussed under natural condition without internal heat and moisture supply. Dependency on air change rate and the wall structure of room climate are discussed. Calculation results show that: 1) precipitation affects considerably on moisture and temperature of underground space and surrounding ground; 2) to predict humidity variation and moisture condensation, distribution of the moisture flow on envelope wall surface must be considered; 3) heat of vaporization apparently effects room air temperature; and 4) From view point of prevention of moisture condensation on surrounding wall, wall structure covered with moisture barrier at the surface of ground side is better than wall covered with moisture barrier at the surface of room air side, because of moisture capacity.