Heated Nozzle Boot for Cooled Hydrogen Fueling
Publication Date: 2009-Sep-10
The IP.com Prior Art Database
Cooling of hydrogen used to fuel vehicles will cause the sealing surfaces of the fueling nozzle to ice up between fills. Our idea is to provide heat and or dry air to keep the nozzle connection equipment warm and dry.
One of the issues with hydrogen fueling involves water or ice forming on the nozzle. After fueling a vehicle with cooled hydrogen, the nozzle will tend to condense water on the cool parts, and possibly ice up. Further, it is only desirable to warm the sealing surface, since warming the entire nozzle will heat the gas used to fill the next vehicle.
There are several possible solutions to this issue. Heat could be applied to heat the end of the nozzle when the fueling station is not in use. This could be done by heating the nozzle end or by providing heaters in the boot. Electrical resistance elements could be placed in the end of the nozzle to provide heat. Radiant (or inductive) heating could also be utilized to heat the nozzle. Another idea is to apply a dry purge stream of warm gas to the end of the nozzle when it is not in use. Yet another option would be to provide a self-opening cap to protect the end of the nozzle when it is not in use. A final option would be to include a locking nozzle boot in addition to having a purge stream or a heating element; this way when the nozzle is at rest, it will be locked and immovable.