| 摘要 |
This invention has its aim in providing a hydrogen heat exchanger for a hydrogen filling system which is of a small size and has high heat transfer performance. The hydrogen filling system, in which a hydrogen tank (8) in a hydrogen fuel-cell automobile (7) is filled with pressurized hydrogen from a hydraulic accumulator (5), has a precooling apparatus (11) equipped with a heat exchanger (12) for cooling hydrogen to be filled. In the heat exchanger (12), the supply pressure in the hydrogen supplying channel (13) is substantially as high as the pressure in the coolant supplying channel (14). This allows the pipe wall of the intermediate pipe between both supplying channels to be thinner than in prior arts. Owing to this, heat transfer resistance and hydrogen pressure loss decrease, improving heat transfer performance and allowing the apparatus to be constituted in a small scale.
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