Thermal characterization of a cavity receiver for hydrogen production by thermochemical cycles operating at moderate temperatures
Thermal characterization of a cavity receiver for hydrogen production by thermochemical cycles operating at moderate temperatures
复制标题
DOI：
10.1016/j.solener.2013.03.008
复制
发表时间：
2013-06
期刊：
影响因子：
6.7
通讯作者：
M. Lanchi;F. Varsano;B. Brunetti;M. A. Murmura;M. Annesini;L. Turchetti;Roberto Grena
中科院分区：
文献类型：
--
作者：
M. Lanchi;F. Varsano;B. Brunetti;M. A. Murmura;M. Annesini;L. Turchetti;Roberto Grena
ENEA开发的用于制氢的锰-铁氧体热化学循环，其最高温度水平在750-800°C范围内，很有可能与使用传统结构材料的太阳能源耦合。作为该循环太阳上可行性验证的第一步，在没有反应的情况下，对ENEA设计的由太阳炉(1kW)供电的接收器-反应堆的热性能进行了实验调查。测量了反应堆腔体温度随太阳辐射的变化规律，并估算了系统的热惯性。实验结果证实，反应堆温度和惯性与锰铁氧体循环和其他在中温下运行的循环是相容的。为了为该样机和其他类似样机的评价奠定基础，建立了描述该反应器热流体力学行为的有限元模型。计算结果与实验数据吻合较好，因此该模型将被改进和扩展以描述锰-铁氧体循环中的放氢反应和放氧反应，以优化反应器设计。
The manganese-ferrite thermochemical cycle developed by ENEA for hydrogen production, whose maximum temperature level lays in the range 750–800°C, has a high potential for coupling with the solar source using conventional structural materials. As a first step for the on sun feasibility validation of the cycle, an experimental survey of the thermal performance of a receiver-reactor designed by ENEA, to be powered by a solar furnace (1kW), has been carried out in the absence of a reaction. 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 and other cycles operating at moderate temperatures. In order to set the basis for the evaluation of this and other similar prototypes, a finite element model (FEM) has been developed to describe the thermofluidodynamic behavior of the reactor. Good agreement between calculated and experimental data has been obtained; therefore this model will be improved and extended to describe both the hydrogen and oxygen releasing reactions of the manganese-ferrite cycle, with the aim of optimizing the reactor design.