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Non-thermal equilibrium model of the coupled heat and mass transfer in strong endothermic chemical reaction system of porous media

机译:多孔介质强吸热化学反应体系传热传质的非热平衡模型

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摘要

A two dimension mathematical model has been developed to simulate the coupled heat and mass transfer in a porous medium undergoing a strong endothermic chemical reaction. Differing from the traditional two phase equation model, just the temperature field of bulk flow is known from the solution of energy equation. The temperature distribution of the solid matrix is solved according to the reaction kinetics of the decomposition of calcium carbonate. The coupling of these two equations is given by the item of chemical reaction. The fluid flow is modeled by the Ergun-Forchheimer-Brinkman equation. This model is solved numerically by the alternate dimension implicit method, and the numerical results are validated by comparing with the experimental data in literature. The influence of the strongly endothermic chemical reaction on the heat and mass transfers in the porous medium is discussed. The reaction features of the packed bed of pellets are analyzed under different conditions by varying the key parameters.
机译:已经开发了二维数学模型来模拟在经历强吸热化学反应的多孔介质中的传热和传质耦合。与传统的两相方程模型不同,从能量方程的解中仅知道整体流动的温度场。根据碳酸钙分解的反应动力学来求解固体基质的温度分布。这两个方程的耦合由化学反应项给出。流体流动通过Ergun-Forchheimer-Brinkman方程建模。通过交替维数隐式方法对该模型进行数值求解,并与文献中的实验数据进行比较,验证了数值结果。讨论了强吸热化学反应对多孔介质中传热和传质的影响。通过改变关键参数,在不同条件下分析了颗粒填充床的反应特性。

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