Civil Engineering Reference
In-Depth Information
phase-change material was made of foamed waste glass beads and mixture of
paraffin. The PCM packed bed of 3 cm thickness was installed under the floor-
board with multiple small holes. The change in room temperature and the amount
of stored heat were measured, and results showed the possibilities of cooling load
shifting by using packed granulated PCM.
Also ceiling boards can incorporate PCM for heating and cooling of buildings.
An example is that developed by Kodo and Ibamoto
2002
, where PCM is used for
peak shaving control of air conditioning systems in an office building (Fig.
11
).
Authors
claim
that
these
systems
have
some
advantages
over
conventional
building thermal storage systems that use concrete floor slabs:
1. More efficient thermal storage is expected, since high-density cool air pools on
the PCM ceiling board that forms the floor of the ceiling space.
2. All of the ceiling board can be used for thermal storage, since the cool air can
flow through the ceiling chamber without being interrupted by beams.
3. Since the surface temperature of the ceiling board is kept at the PCM melting
point for an extended period, the indoor thermal environment, including the
radiant field, can be improved.
Acknowledgments The work is partially funded by the Spanish government (ENE2011-28269-
C03-02). The authors would like to thank the Catalan Government for the quality accreditation given
to their research group GREA (2009 SGR 534) and research group DIOPMA (2009 SGR 645).
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