描述金属氢化物反应器中反应-传热耦合现象的理论模型构建

In ordcr to improve the theoretical model of metal hydride reactors and achievc an accurate description of the reaction process of the rcactor, the classical Stefan problem is utilizcd to describe the hydrogen-thermal coupling phenomenon inside the metal hydride reactor, simplifying it into a reaction front advancc problem. By combining the thermal potential theory and the caloric theory proposed by Guo Zengyuan et al, a ncw modified method based on the "thermal potential" theory is introduced. In this method, whcn solving for the dissipation function, instead of differentiating the thermal displacement field into two parts based on its relationship with the internal heat source, the entire thermal displacement field is diffcrcntiatcd as a whole. As a rcsult, it was found that compared with the literature results, the approximate solution obtained by the modified method of thermal potential theory encompassed the existing theoretical models structurally and exhibited high accuracy* with an average error of 0. 6% compared to the simulation results. Research has shown that utilizing the reaction front advance model to describe hydrogen-heat coupling phenomena in the reactor is reasonable, and the proposed theoretical model can provide reasonable and accurate predictions for the reaction process under different operating conditions.