This short book provides an update on various methods for incorporating
phase changing materials (PCMs) into building structures. It discusses
previous research into optimizing the integration of PCMs into
surrounding walls (gypsum board and interior plaster products), trombe
walls, ceramic floor tiles, concrete elements (walls and pavements),
windows, concrete and brick masonry, underfloor heating, ceilings,
thermal insulation and furniture an indoor appliances.
Based on the phase change state, PCMs fall into three groups:
solid-solid PCMs, solid-liquid PCMs and liquid-gas PCMs. Of these the
solid-liquid PCMs, which include organic PCMs, inorganic PCMs and
eutectics, are suitable for thermal energy storage.
The process of selecting an appropriate PCM is extremely complex, but
crucial for thermal energy storage. The potential PCM should have a
suitable melting temperature, and the desirable heat of fusion and
thermal conductivity specified by the practical application. Thus, the
methods of measuring the thermal properties of PCMs are key.
With suitable PCMs and the correct incorporation method, latent heat
thermal energy storage (LHTES) can be economically efficient for heating
and cooling buildings. However, several problems need to be tackled
before LHTES can reliably and practically be applied.