ヒートポンプに向けた水素吸蔵合金充填層内の温度上昇の実験と解析

抄録

Mass and heat transfer rates in two types beds packed with Zr-V-Fe alloy particles are investigated in experimental and analytical ways for heat pumps operated at higher temperatures. The constant pattern approximation is applied to the hydrogen concentration (or hydrogen pressure) and temperature profiles in smaller and larger beds. The partial differential equations are reduced to ordinal differential equations under proper assumptions. The mass-transfer rate in the smaller bed is correlated in terms of two mass-transfer capacity coefficients and the heat-transfer rate in the larger bed is in terms of two dimensionless parameters, a and β. A set of analytical solutions was obtained for the hydrogen concentration and temperature with the coherent profile. The experimental profiles were well flitted by those of the numerical or analytical solutions.