The pre-cooling device is one of the core equipment of the 70 MPa hydrogen refueling station

which ensures that the hydrogen refueling temperature of the hydrogen refueling station meets the standard requirements. Therefore

the basic structure and working principle of the pre-cooling device used in hydrogen refueling stations are introduced

and the technical characteristics of the pre-cooling device at home and abroad are compared. At present

there are two common pre-cooling methods. Among them

the pre-cooling device with liquid nitrogen has a complex structure

but it is suitable for hydrogen refueling stations with abundant liquid nitrogen. The pre-cooling device which includes refrigeration unit has many applications

but the initial cost is high. However

the above two types of pre-cooling devices lack precise temperature control and need to be further improved.