Heat Radiation
Where possible, cargo that is sensitive to
condensation must be protected from the extremes of radiant
heat and extreme cold. Examples are:
· When the container is in the terminal
stack: shaded stow required.
· Aboard ship: underdeck stow or protected deck stow
required.
· Lengthy road/rail transit.
For example:
A non-insulated container containing bagged
coffee at the terminal in Assab is subjected to the radiant
heat of the sun. The air inside the container will become
heated and absorb moisture from the coffee, thus establishing
conditions of high humidity. Night cooling can cause the temperature
of the container skin to fall below the dew point of the humid
conditions within the container thus causing condensation.
The need to avoid radiant heat is emphasised
in this example and late packing of coffee prior to export
would also help. Also long, exposed periods at transshipment
terminals such as Djibouti during the summer months should
be avoided.
At destinations with near zero temperatures
it is important that early delivery of sensitive/hygroscopic
cargoes is effected. if this is not done the cargo can experience
what we call the "cold shock" of the first night
ashore.
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