Cryogen/water heat exchanger and the application thereof to the supply of gas to an on-board power unit in a vehicle

摘要

The invention relates to an exchanger, advantageously a plate exchanger, comprising counter-current parallel exchange sections ( 8,9 ). According to the invention, the exchange section for the water ( 8 ) has an essentially constant cross-section, whereas the exchange section ( 9 ) for the cryogen has a reduced inlet region ( 9 a) enabling the possible formation of ice ( 10 ) in the water passage ( 8 ) to be concentrated on a small volume, without blocking said water passage. The invention can especially be applied to the supply of gaseous hydrogen stored in a liquid form to an on-board power generating device in a vehicle.