Abstract
An experimental investigation aimed at improving the effective thermal conductivity of activated metal hydride is reported. Of the many material configurations which have been used to enhance heat transmission through metal hydride beds, a three-dimensional structure of a porous aluminium composite has shown the best results giving transmissions a factor of 9 or 10 greater than those of the unmodified hydride bed. The experimental results were used to derive equations for estimating the effective thermal conductivity as a function of the system pressure, the temperature, the hydride composition and the void fraction of the materials used.
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