ABSTRACT
This paper presents experimental, numerical and analytical data that quantify transient moisture transfer between dry spruce plywood and humid air. The experimental data are measured in a test facility that permits the continuous measurement of relative humidity, temperature and moisture accumulation within a bed of spruce plywood following a step change in boundary conditions. In the facility, a small-scale wind tunnel creates well-controlled and transient boundary conditions above the plywood bed. The experimental data are compared to numerical data from a one-dimensional, transient heat and moisture model and the analytical solution to one-dimensional moisture transfer in an infinite porous medium. The experimental, numerical and analytical results show that moisture storage is very important for spruce plywood.
