MODELING OF SOLAR THERMOCHEMICAL RECEIVER

摘要

The thermochemical storage systems are one alternative to face the randomness of solar energy, howeverthese systems are in stage of experimental yet, and development before their implementation and utilizationto big scale. The purpose to get information, for an optimal design of a thermochemical storage system. It isproposed a model to predict the behavior of a solar fluidized bed receiver finding the temperature andconcentration profiles in transient state. The mathematical model is development for a fluidized bed solarreactor shown for a flow of solar concentrated radiation. Dynamics conditions of heating and reaction wereconsidered. Is accomplished a sensibility study respect to the entry temperature of the gas and radiation flux.It is modeling a solar fluidized bed reactor that involves a chemistry reaction reversible of thermaldissociation of the Zinc sulfate (ZnSO4), proposed as thermochemical storage agent of solar energy. A twodimensionaldistribution that involves the expansion effects contraction of the bed, the heating was simulatedfor a radiation flux with a normal distribution over lateral walls and under distributed flow conditions of thefocal stain. Results present the variation between both cases, in where the temperature profiles grow withrespect to the axial flow address due to external radiatives contributions and internal convectivescontributions. Results show a strong dependency in temperature profiles with the type of radiation flow.