LaNi4.7Al0.3Dx去氘化热、质传输二维模型研究

建立了LaNi4.7Al0.3Dx去氚化过程中热，质传输的二维数学模型。该模型考虑了气相和固相之间存在的温差以及氚化的密度和比热的变化。计算了金属氚化的在去氚化过程中气－固相温差，组分和密度的分布，以及热导率和加热流体温度对气－固相温差的影响，并考察了模型的适用性。计算结果表明：热导率及加热流体温度对气－固相温差影响显著，最大温差随热导率的增加而减小，随加热流体温度的升高而增大；金属氚化物中组分和密度的分布与气－固相温差有关；根据数学模型获得的反应分数与实验值具有很好的一致性。

Two-Dimensional Heat and Mass Transfer Model during Desorption in a LaNi4.7Al0.3-Deuterium Reactor

A two-dimensional model characterizing heat and mass transfer during desorption in a LaNi 4.7 Al 0.3 deuterium reactor was established by taking into account difference in temperature between the gas and the solid and variation of density and specific heat of the deuteride. Distributions of difference in temperature between the gas and the solid, composition and density of deuteride were gained. Influence of thermal conductivity of deuteride on the difference was discussed, and validity of the mathematical model experimentally tested. Calculated data show that thermal conductivity of deuteride and temperature of heating fluid sharply influence the difference whose maximum value decreases with thermal conductivity of deuteride and increases with temperature of heating fluid. Distributions of composition and density of deuteride maintain links with the difference. Experimental data show that calculated values of reacted fraction are in good agreement with experimental ones.