The influence of mass tourism and hygroscopic inertia in relative humidity fluctuations of museums located in historical buildings

The preservation of artefacts in museum collections is profoundly affected by fluctuations in temperature and relative humidity. This work presents the results of an experimental laboratorial study, conducted in a flow chamber to demonstrate the enormous potential of hygroscopic materials in stabilizing interior relative humidity. In order to assess the risk of mass tourism and hygroscopic inertia of finishing materials, associated with the hygrothermal behavior of museums, an analysis of several numerical scenarios, with a different number of visitors per hour, and finishing materials, in order to quantify the risks associated with the fluctuations of relative humidity. The results of sensitivity studies performed are presented for the case of a museum in Porto