Cooling of a supply pipe in a hydrogen refueling system

A method for cooling a supply pipe in a hydrogen refueling system, where the hydrogen refueling system is arranged for filling a vessel of a vehicle with hydrogen, the hydrogen refueling system comprising a hydrogen supply, a hydrogen center enclosure, a cooling system arranged for cooling the hydrogen delivered to the vessel, a dispenser arranged for supplying the hydrogen to the vessel, and a supply pipe arranged for guiding the hydrogen from the center enclosure to the dispenser, where the method comprises

• guiding a supply pipe cooling media from the cooling system towards the dispenser through a forward path, and
• guiding at least a fraction of the supply pipe cooling media back to the cooling system through a return path, where at least one of the forward and return paths are thermally connected with the cooling system, and where at least one of the forward and return path cools the supply pipe.

A method comprising the step of using carbon dioxide as a supply pipe cooling media in a forward path and a return path for cooling a supply line between a hydrogen center enclosure and dispenser in a hydrogen refueling system.