Abstract: A mobile liquid and gaseous hydrogen refueling apparatus including: a main storage module for receiving liquid hydrogen to produce first gaseous hydrogen; a liquid pumping and transporting module for receiving the liquid hydrogen, pumping the liquid hydrogen, and producing second gaseous hydrogen; a gas compressing and storing module for receiving at least one of the first gaseous hydrogen and the second gaseous hydrogen and compressing and storing the at least one gaseous hydrogen; and a gas converting and transporting module for receiving the pumped liquid hydrogen and the compressed gaseous hydrogen, performing heat exchange between the pumped liquid hydrogen and the compressed gaseous hydrogen, producing gaseous hydrogen for refueling, and transporting the gaseous hydrogen for refueling to a gaseous hydrogen fuel consumption structure.

Abstract: A thermoelectric cryogenic material storage container including: an inner container containing cryogenic liquid material; a supply pipe connected to the inner container to supply the cryogenic liquid material from the outside to the inner container; an outer container for accommodating the inner container to be spaced apart from each other; a discharge pipe provided to be connected to the inner container to discharge a vaporized material of the cryogenic liquid material vaporized in the inner container to the outside of the outer container; and at least one thermoelectric module provided to have one side in contact with the outer side of the supply pipe and the other side in contact with the outer side of the discharge pipe. When current is supplied to the thermoelectric module, the other side becomes a heating side, and the one side becomes a cooling side.

Abstract: Provided is a method of providing a hydrogen fuel cell vehicle charging service, performed by a hydrogen fuel cell vehicle charging service providing server connected to a user terminal and a plurality of charging-vehicle terminals, the method including (a) analyzing a fuel usage pattern of a hydrogen fuel cell vehicle related to the user terminal and predicting a fuel charging time of the hydrogen fuel cell vehicle on the basis of the fuel usage pattern; (b) determining a charging location and a charging-performing vehicle terminal at the fuel charging time on the basis of location information of the user terminal, and providing the user terminal with a charging alarm including information regarding the charging location and the charging-performing vehicle terminal; and (c) providing the charging-performing vehicle terminal with the information regarding the user terminal and the charging location when a charging request is received from the user terminal in response to the charging alarm.

Abstract: Disclosed herein are a liquid hydrogen fueling system including a liquid hydrogen storage tank and a fueling method thereof. The liquid hydrogen fueling system partitions the inner tank of the liquid hydrogen storage tank into a first inner tank and a second inner tank, which are separate from each other, and makes liquid hydrogen easily flow from the liquid hydrogen storage tank to a high-pressure pump using the difference between the pressure inside the first inner tank and the pressure inside the second inner tank, thereby enabling high-pressure charging of liquid hydrogen in spite of the low density thereof.

Abstract: Disclosed is a small-scale hydrogen liquefaction system using cryocoolers. The system includes: a gas supply line to supply a gaseous hydrogen; n cryocoolers each connected to the gas supply line to be connected in parallel and configured such that the gaseous hydrogen supplied from the gas supply line is divided into n portions, and the n portions flow through the n cryocoolers, respectively, and are cooled to a liquefaction temperature, wherein n is a natural number equal to or greater than 2; n heat exchangers each attached to a cold head of each of the n cryocoolers; and a low-temperature chamber providing an accommodation space to accommodate the n cryocoolers therein.

Abstract: Provided is a method of providing a hydrogen fuel cell vehicle charging service, performed by a hydrogen fuel cell vehicle charging service providing server connected to a user terminal and a plurality of charging-vehicle terminals, the method including (a) analyzing a fuel usage pattern of a hydrogen fuel cell vehicle related to the user terminal and predicting a fuel charging time of the hydrogen fuel cell vehicle on the basis of the fuel usage pattern; (b) determining a charging location and a charging-performing vehicle terminal at the fuel charging time on the basis of location information of the user terminal, and providing the user terminal with a charging alarm including information regarding the charging location and the charging-performing vehicle terminal; and (c) providing the charging-performing vehicle terminal with the information regarding the user terminal and the charging location when a charging request is received from the user terminal in response to the charging alarm.

Abstract: Disclosed is a small-scale hydrogen liquefaction system using cryocoolers. The system includes: a pre-cooling heat exchanger for pre-cooling gaseous hydrogen using liquid nitrogen; a first cryocooler that primarily cools the gaseous hydrogen, pre-cooled by the pre-cooling heat exchanger; a heat exchanger attached to a cold head of the first-cryocooler; an n-th cryocooler (wherein n is a natural number equal to or greater than two) that is connected in series with the first cryocooler and cools the gaseous hydrogen, primarily cooled by the first cryocooler, to a liquefaction temperature of 20.3 K; a condensation plate arranged to be in contact with the n-th cryocooler to liquefy the gaseous hydrogen, cooled to the temperature of 20.3 K by the n-th cryocooler; and a low-temperature chamber providing an accommodation space to accommodate the pre-cooling heat exchanger, the first cryocooler, and the n-th cryocooler.