Cascading type liquid hydrogen refueling station cooling capacity recovery system and method

The invention relates to a cascade type liquid hydrogen refueling station cooling capacity recovery system and method.The cascade type liquid hydrogen refueling station cooling capacity recovery system comprises a plurality of three-way structures and a plurality of heat exchangers which are all arranged in a closed cold box, and further comprises a hydrogen flow path and a plurality of working medium flow paths; nitrogen, carbon dioxide, an ethylene glycol solution, water and the like are selected as cold energy recovery and cold storage working media, cold energy recovery in the liquid hydrogen gasification process is achieved in a cascade mode according to the temperature gradient, effective cold energy reutilization can be conducted, the problems of liquid hydrogen in the air cooling and water cooling gasification process are avoided, and the economical efficiency of the liquid hydrogen refueling station is improved. 本发明涉及一种级联式液氢加氢站冷量回收系统和方法，所述级联式液氢加氢站冷量回收系统包括均布置于封闭冷箱中的多个三通结构和多个换热器，还包括氢流路和多个工质流路，本发明选用氮、二氧