Numerical evaluation of high temperature thermal energy storage with thermally conductive geopolymer

The work evaluates the contribution of newly developed thermally conductive geopolymer (TCG) in high temperature energy thermal storage (HTTES). The work contains a review of energy storage principles with emphasis on storage in the form of heat. Evaluation of the benefits of the thermally conductive geopolymer was carried out by mathematical modeling. Both experiments and modeling itself progressed from simple to more complex. The progress of knowledge and instrumentation experiments and their evaluation were documented. The experiments with simple rock samples, medium-sized experiment with a block of granite with artificial fracture filled with TCG to the actual prototype of thermal energy storage were analyzed by the means of mathematical modeling. It was demonstrated positive impact of TCG on distribution of heat in the storage core. The acquired knowledge was used to extrapolate the results and to predict accumulation options of medium-sized storage