Thermo-fluid dynamic model for horizontal packed bed thermal energy storages

An asymmetrical thermo-fluid dynamic model for horizontal packed bed thermal energy storages is developed and implemented. The model can account for void fraction distributions and different thermal insulation materials surrounding the storage tank. A first simulation study is performed to investigate the influence of the thermal insulation properties and height to width ratio of the storage on the temperature profile progression and overall performance of the thermal storage. During the first charge and discharge cycle the non-symmetric thermal insulation has a considerable influence on the temperature profile progression. Thermal insulation properties and the height to width ratio can affect the efficiency of the thermal storage.