Analysis of the thermal ratcheting phenomenon in packed-bed thermal energy storage using Discrete Element Method
Thomas Mitterlehner, Georg Kartnig, Markus Haider
Abstract
Packed-bed thermal energy storages (TES) play a major role in energy technology. During energy absorption, hot air flows through the content of the TES in top-down direction. During the heating process, the expansion of the heat-storing medium (bulk material) leads to a stress increase on the walls of heat-storage tanks. These occurring loads are to be considered by means of a discretized model. Furthermore, it is of interest how the loads modify during several loading and unloading processes (thermal ratcheting phenomenon). In this paper, it will be investigated how this behaviour can be modelled using the dem approach.
Topics & Concepts
Thermal energy storageThermalMechanicsMaterials scienceDiscrete element methodPacked bedDiscretizationThermal energyProcess (computing)Energy storageStress (linguistics)Mechanical engineeringStructural engineeringThermodynamicsEngineeringComputer sciencePhysicsOperating systemMathematicsChemical engineeringPhilosophyPower (physics)LinguisticsMathematical analysisPhase Change Materials ResearchAdsorption and Cooling SystemsHeat and Mass Transfer in Porous Media