VAPOR BUFFERING IN A SINGLE ROOM UNDER STEADY STATE EXTERIOR CONDITIONS -COMPARISON BETWEEN SIMULATIONS AND MEASURED RESULTS

In this paper, experiments and simulations for moisture buffering of the gypsum boards is described.The small chamber (4.62 m3) installed the gypsum board on the interior surface was used for theexperiments. This chamber was located in a climate chamber. The ambient condition of the smallchamber was controlled at constant temperature and humidity. In the experiment for the relationshipbetween moisture buffering and ventilation rate, three cases of ventilation rate, i.e. no ventilation, 1.01/h and 5.0 1/h, were investigated. In the experiment for the relationship between moisture bufferingand volume rate of the materials, various area and locations of the gypsum boards on the surroundingwalls was investigated.Simulations were also carried out to compare with the measurement results. Experimental data set forboundary conditions, i.e. ventilation rate, amount of moisture production, ambient air temperature andhumidity, were provided as input data for simulations. Six simulation programs participated in thisproject. Simulation results in some of cases indicated comparatively good agreement with themeasurement results. However, deviations between experimental values and simulation results in othercases were large.