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In the range of the modernization and restoration of the Herzog-Anton-Ulrich Museum of Brunswick, the differences between
the climate near the exterior wall and that of the average room-climate were measured.

In addition to that, the risk of damages at the building fabric caused by moisture and the conservative risk of the exhibits
fixed at the inner side of the exterior walls were evaluated.

Regarding the mathematical description of the heat-transfer circumstances and flow circumstances at the area near the exterior
walls, the determination of the convective heat-transfer coefficient at the boundary areas of wall and exhibit to the air gap
is not clearly soluble. Usually the affinity theory can be used when having free convection circumstances.

In the above-mentioned case there is a thermally affected output stream at the cold wall as well as a forced convection that
is due to the ventilation and heating system.

For this application, in particular regarding the airspeed and the gap’s geometry, there are no authentic similarity models
known. As a result, it is only possible to get an approximate appointment of the heat-transfer procedure by calculating.

Temperature and moisture measurements on the objects’ surfaces were carried out in addition to the theoretical analyses
to evaluate the conservative and physical risk of damage regarding the precise case of a picture gallery. In addition to that, the
heat and airflow in the range of the exhibits that are fixed at the inner side of the exterior wall have to be analyzed via numerical
simulation.

Citation: Thermal Performance of Exterior Envelopes of Whole Buildings IX