Abstract
Two horizontal metal hydride tanks with a double coil heat exchanger that contained 50 kg of MmNi_5 metal hydride alloy with different Pressure-Composition-Temperature (PCT) isotherm properties were developed and tested in this study. One was designed for the experiments in USA and the other was designed for the experiments in Japan in which there is the high pressure gas safety act. The reaction heat recovery rates of these tanks were compared and it was confirmed that the reaction heat recovery rates were almost the same. However it could not be filled the tank up with hydrogen in the case of the Japanese specifications.
