Thermal structure inside a statue or column under stationary lighting

  • Camuffo D
  • Vincenzi S
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Abstract

The temperature distribution and the heat flux across a cylinder and sphere are examined for steady-state conditions of energy supply. The solutions for the cylinder are very similar to those for the sphere. This mathematical approach simulates the behaviour of a statue when lighted for some hours in an exhibition room. The problem is very important since many delicate objects are exposed to intense lighting for many hours each day, and deterioration processes may all act in the same manner. The side exposed to the light experiences not only the largest energy supply, but also the greater temperature gradient. In objects with a high water vapour content, the temperature gradient causes the migration of moisture, which is eventually responsible, together with the temperature variations, for severe deterioration of works of art. As a consequence, diffuse lighting in exhibition rooms is suggested. © 1986.

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