Civil Engineering Reference
In-Depth Information
Fig. 17
Some applications of PCM in building envelopes (Xin et al.
2009
)
innovative and appreciably reasonable. But, there is much more to be done for
improving the thermophysical properties and energy efficiency of PCMs through
performing the basic materials research.
7 Chilled Water-Packed Bed Latent Thermal Energy
Storage
In the modern energy-efficient building design, the concept of chilled water-based
LTES system utilizing the PCM as heat storage material is increasingly popular
among the architects and the design engineers worldwide. The full-scale schematic
representation of this system being dedicated for the cooling applications in
buildings can be referred from Parameshwaran et al. (
2010
).
Precisely, the operational strategy of this system is divided into two folds:
(a) during the charging process (part-load conditions), a portion of the chilled water
produced at a temperature of 4-5 C is pumped to the heat transfer station, and the
remaining portion of the chilled water is by-passed to the packed bed LTES system.
By this, the chilled water entering the heat transfer station transfers the cold energy
to the building-side return warm water flowing at a temperature of 11-12 C.
