APPARATUS FOR MEASURING REACTION SPEED OF HYDROGEN-STORING ALLOY

摘要

PROBLEM TO BE SOLVED: To reduce the influence of a pressure change consequent to a temperature change and enable highly accurate measurement by respectively providing a part of a measuring system with an accumulator of a large capacity and a buffer tank with a temperature stabilization means. SOLUTION: A testing apparatus is arranged inside a thermostat 3. A sample container 1 of high-conductivity metal having a filter 2 of small pressure loss built therein, a large-capacity accumulator 4, a highly accurate pressure gauge 5, a relief valve 6, a buffer tank 8 and a highly accurate differential pressure gauge 9 are connected via an opening valve 7 of good response and small flow resistance. The accumulator 4 and buffer tank 8 are incorporated in a heat insulation chamber 10. In this constitution, an initial pressure is measured by the pressure gauge 5, and a change of a hydrogen pressure while a reaction speed is measured is obtained by recording a differential pressure of the buffer tank 8 and accumulator 4 by the differential pressure gauge 9. At this time, in order to prevent an internal pressure of the buffer tank 8 and accumulator 4 from being changed because of a temperature change, the buffer tank 8 and accumulator 4 are thermally insulated in the heat insulation chamber 10.