Modeling of sorption systems for thermal energy storage

The modeling of sorption systems for thermal energy storage can involve different levels, that is, from powdery level (modeling of material) up to system level and make use of a continuum or lumped (noncontinuum) approach. Different levels of detail and different scales of the problem require the implementation and solutions of diverse sets of equations and solution methodologies. In this chapter, the model at reactor and system level is discussed, with specific focus on the equilibrium description of working pairs and the solution of heat and mass transfer problems in continuum or lumped reactor systems, as well as the black-box models employed when the integration of a thermal energy storage in a more complex energy system is required. Finally, some examples of applications are discussed to show the potentialities of the different methodologies.