Abstract
AIST and SRNL have engaged in a joint research project on a Totalized Hydrogen Energy Utilization System (THEUS) under the clean energy partnership technology program between METI and DOE. THEUS makes use of a novel unitized reversible fuel cell and metal hydride tanks. A horizontal metal hydride tank with a double coil type heat exchanger was developed and connected to the hydrogen system, which was comprised of solar panels, a water electrolyzer, and a fuel cell, etc. in SRNL. The absorption characteristic of the metal hydride tank with the intermittent hydrogen production rate from the electrolyzer, and the desorption characteristic of the tank with the fuel cell were experimentally investigated. It was confirmed that the reaction heat recovery rates of the metal hydride tank was almost 100% in case of absorption, and it was 96% in case of desorption.
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