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Comment Heat Transfer

Phase-change slurry

By Yelena Shamis |

Researchers from the Fraunhofer Institute for Environmental, Safety and Energy Technology (Umsicht; Sulzbach-Rosenberg; www.umsicht.fraunhofer.de) and RWTH Aachen University (both Germany; www.rwth-aachen.de) have developed a new phase-change material (PCM) trade-named CryoSolPlus. The PCM is a dispersion of solid paraffin beads and water, and can be circulated as a heat-transfer fluid, as a storage medium for thermal systems, and for cooling. When the dispersion absorbs heat, the paraffin melts, thereby storing the energy without a change in temperature. The researchers have developed mats with capillary tubes that can be used in ceilings, for example, to maintain room temperatures as it gets hot outside, thereby reducing the demand for air conditioning in buildings.
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