Phase Change Materials for Thermal Energy Storage
The Thüringisches Institut für Textil-und Kunststoff-Forschung e. V. (TITK) (Thuringian Institute of Textile and Plastics Research), Rudolstadt, Germany, is working on the development and production of phase change materials (PCM) for thermal energy storage. The aim is to develop energy-efficient thermal management of processes and applications. The basis for this is a PCM compound. Through the use of the PCM compound, the enthalpy of fusion and crystallization enthalpy of the material are technically exploited to achieve high energy density in a narrow temperature range. This permits, for example, peak cutting or the storage of cooling or heating energy for delayed release.
The "trick" with the developed PCM compound lies in the fact that the liquid phase is bound in a polymer network structure, so that the liquid remains "solid". The phase change temperature can be adjusted from -4 to 82°C. Through the incorporation of additives such as graphite or boron nitride, other properties can be obtained in the compound. For example, it can be processed by compression molding, extrusion or injection molding into various shaped articles such as composite panels, films, sheets or castings.
Thüringisches Inst. f. Textil- und Kunststoff-Forschung e.V. TITK
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