|10.3.2 Storage temperatures in the container|
|10.3.2.1 Influence of solar radiation|
|10.3.2.2 Depth of penetration of temperatures|
|If the correct decision as to the suitability of a container for transporting a product without causing damage is to be made, it is essential to have sufficient information about the anticipated climatic conditions in the container. Fig. 9 shows factors which have an influence on the cryptoclimate in the container.
The four decisive influencing factors are:
Climatic conditions during the voyage are determined by the route, season and current weather events. Consequently, it is not entirely straightforwardly possible to transfer the experience gained from one voyage or one route to another as the stresses vary between the different routes and individual voyages. Solar radiation, air temperature and wind are of significance to thermal stress.
The temperatures encountered in containers are primarily determined by heat exchange across the steel boundary surfaces, with inward and outward radiant transfers predominating.
Good heat-transfer properties, especially through the metal walls, and the relatively large ratio of container surface area to container volume have a favorable impact in this respect (20' container, approx. 1.80 m²/m³).
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