The ENEA manganese-ferrite cycle, whose maximum temperature level lays in the range 750-800°C, has a high potential for a viable coupling with the solar source using conventional structural materials. As a first step of the on sun feasibility validation, an experimental survey of the thermal performance of a reactor powered by a solar furnace (1 kW) has been carried out. The temperature distribution over the reactor chamber as a function of solar irradiation has been measured and the thermal inertia of the system has been evaluated. The experimental results confirm that the reactor temperature and inertia are compatible with the manganese-ferrite cycle. A Finite Element Model (FEM) has been developed for the description of the thermofluidodynamic behavior of the reactor, achieving a good agreement with the experimental data. Therefore this model will be improved and extended for describing both the hydrogen and oxygen releasing reactions, with the aim of analyzing the experimental results and optimizing the reactor design.
On sun demonstration of hydrogen releasing step of the mixed ferrites thermochemical cycle: thermal characterization of the reactor / M., Lanchi; F., Varsano; B., Brunetti; Murmura, MARIA ANNA; Annesini, Maria Cristina; L., Turchetti; R., Grena. - STAMPA. - (2011), pp. 357-359. (Intervento presentato al convegno Solar Paces tenutosi a Granada, Spagna nel 20-23 Settembre 2011).
On sun demonstration of hydrogen releasing step of the mixed ferrites thermochemical cycle: thermal characterization of the reactor
MURMURA, MARIA ANNA;ANNESINI, Maria Cristina;
2011
Abstract
The ENEA manganese-ferrite cycle, whose maximum temperature level lays in the range 750-800°C, has a high potential for a viable coupling with the solar source using conventional structural materials. As a first step of the on sun feasibility validation, an experimental survey of the thermal performance of a reactor powered by a solar furnace (1 kW) has been carried out. The temperature distribution over the reactor chamber as a function of solar irradiation has been measured and the thermal inertia of the system has been evaluated. The experimental results confirm that the reactor temperature and inertia are compatible with the manganese-ferrite cycle. A Finite Element Model (FEM) has been developed for the description of the thermofluidodynamic behavior of the reactor, achieving a good agreement with the experimental data. Therefore this model will be improved and extended for describing both the hydrogen and oxygen releasing reactions, with the aim of analyzing the experimental results and optimizing the reactor design.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
