PCM
Phase Change Materials
Phase-change materials or PCM, including inorganic salts, organic materials or paraffin embedded in different melting temperatures, are materials that allow to accumulate considerable amounts of heat while maintaining a constant temperature.
To give an idea, this behavior can be useful (and used) for example in the building sector: in the summer season, it is possible to increase thermal inertia within an environment by accumulating during the heat day (to be returned to the outside environment during the night), while in the winter phase accumulated heat can be returned in indoor environments.