Given good thermal contact,
the PCM begins to solidify and melt at a specified temperature. In
practice, a thin container of good thermal conductivity is not always
possible. In such cases the following factors come into play:
 Thickness
of container
Thermal
conductivity of container
Movement
of medium (air, water, oil) around the container
Rate
of heat transfer between inside / outside
Temperature
differential between PCM and the environment
Amount
of heat being generated in the environment
Installation of PCM should take into account good air circulation to
allow air above the surface of the PCM container to be removed efficiently
and sufficient air conditioning/free cooling to ensure recharging of
PCM after it has changed its phase to liquid state
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