CTE analysis of saturated cement-based sensible heat storage materials

摘要

The linear coefficient of thermal expansion (CTE) of three cement based energy storage materialsrnin saturated condition is determined experimentally. The CTE is a material property that indicates the extent tornwhich a material expands or contracts upon heating or cooling respectively and plays a vital role in the thermohydro-rnmechanical analysis of sensible heat energy storage systems. Throughout their lifetime, sensible heatrnenergy storage systems are subject to frequent temperature changes due to heating and cooling effects of loadingrnand unloading of heat energy respectively. The different components of sensible heat energy storage system suchrnas heating/cooling element, energy storage material, insulators and others, are constructed of different materialsrnwhich possess un-equal CTE values, and hence produce extra stress in the system when heated or cooled. Whenrnunaccounted for, the extra stresses generated due to the heating/cooling processes may cause damage or failurernof the thermo-hydro-mechanical system.