Casing system containing a heat exchanger for reheating dihydrogen

A casing system which is intended to be mounted between a supply pipe and a discharge pipe in which a heat exchange fluid circulates, the casing system comprising:

• a sealed casing which is divided by a sealed separation wall into a first volume and a second volume which is filled with a gas which is inert with respect to dihydrogen;
• a vacuum pump which is fluidically connected to the first volume and which is configured, during operation, to generate a reduced pressure in the first volume;
• an upstream pipe along which an upstream solenoid valve is mounted and which is configured to be fluidically connected to a dihydrogen tank;
• a downstream pipe along which a downstream solenoid valve is mounted and which is configured to be fluidically connected to an engine;
• a heat exchanger which is fixed inside the sealed casing through the separation wall and which has a first inlet which is fluidically connected to the upstream pipe downstream of the upstream solenoid valve and a first outlet which is fluidically connected to the downstream pipe upstream of the downstream solenoid valve and which has a second inlet which is configured to be fluidically connected to the supply pipe and a second outlet which is intended to be fluidically connected to the discharge pipe, wherein the first inlet is arranged in the first volume and the first outlet is arranged in the second volume;
• a first pressure sensor in the first volume;
• a second pressure sensor in the second volume;
• a control unit configured to
• receive pressure values measured by the first and second pressure sensors in order to detect when a deviation in absolute value between two successive values of a pressure in the first volume is less than a first first threshold or greater than a first second threshold which is greater than or equal to the first first threshold and to detect when a deviation in absolute value between two successive values of a pressure in the second volume is less than a second first threshold or greater than a second second threshold which is greater than or equal to the second first threshold, and
• close the upstream and downstream solenoid valves when the control unit detects a deviation in absolute value between two successive pressure values beyond the first second threshold in the first volume or the second second threshold in the second volume.