5015 金属メッキが水素吸蔵合金の有効熱伝導率に与える影響評価(S53 水素貯蔵技術における熱工学的諸問題,S53 水素貯蔵技術における熱工学的諸問題)

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The effective thermal conductivities of TL-492 (Mm (La_<0.6-0.8>)Ni_<4.0>Mn_<0.2>Al_<0.2>) with hydrogen and helium have been examined at pressure from 0 to 2MPa, with before activation, after activation and oxidized status of metal hydrides. Experiment results show that pressure has great influence on effective thermal conductivity in low pressure range (<0.3MPa). And that influence decreases rapidly with increase of gas pressure. Metal coating method has been considered as an easy and efficient method to enhance the poor thermal conductivity of metal hydrides. At the present research, effective thermal conductivity of pure LaNi_<4.7>Al_<0.3> and its Cu metal coated alternative which have two weight percentages have been tested and compared with carbon fiber. It has shown that this method is not as effective as carbon fiber because its highest improvement is only 1.67 times comparing to pure LaNi_<4.7>Al_<0.3>, less than 1/3 of the efficiency of carbon fiber mixing method, and it takes much more additives.
2006-09-15