An all mechanically controlled, non-venting pressure control system for liquid hydrogen and liquid oxygen cryogenic tanks that requires no electrical control while managing disparate, non-stoichiometric reactant boil-off rates is provided. The pressure control system allows for the passive and repeatable stoichiometric consumption of hydrogen and oxygen boil-off from cryogenic tanks to form liquid water, while preventing the liquid hydrogen and liquid oxygen cryogenic tanks from overpressurizing and venting to the external environment. More particularly, in response to an overpressure condition in a first reactant reservoir, a backpressure regulator is opened, providing the overpressure first reactant to a fuel cell or other consumer, and providing a pilot signal to open a supply line from a second reactant reservoir to the consumer. Whether the second reactant is supplied from the second reactant reservoir as gas or a liquid is determined based on the pressure within the second reactant reservoir.

An illustrative example method of controlling operation of a fuel cell power plant includes opening a pneumatic valve using pneumatic pressure of pressurized fuel cell reactant, allowing the pressurized fuel cell reactant to flow through the pneumatic valve to a cell stack assembly, determining that shutdown of the cell stack assembly is desired, and control a rate that the pneumatic valve closes by controlling a rate of release of the pneumatic pressure.

a fuel cell system without a high pressure line of a hydrogen supplying system, including a gas charging line formed between a gas charging station and a high pressure vessel charged with gas by the gas charging station, and a gas supplying line formed between the high pressure vessel and a stack, includes: a regulator provided in the gas supplying line; a solenoid valve provided in the gas supplying line between the regulator and the high pressure vessel; and a check valve provided in a bypass line connecting one point of the gas supplying line between the regulator and the solenoid valve and one point of the gas charging line.

A flow battery system includes a first tank including a hydrogen reactant, a second tank including a bromine electrolyte, and at least one cell including a first electrolyte side operably connected to the first tank and a second electrolyte side operably connected to the second tank. The battery system further includes a direct connection line directly connecting the first tank and the second tank and configured such that the hydrogen reactant passes between the first tank and the second tank.

A system for storing solid state hydrogen includes: a solid state hydrogen storage pellet including a magnetic material and storing solid state hydrogen therein; an inner container surrounding the solid state hydrogen storage pellet; and a coil surrounding the inner container, wherein when current is supplied to the coil, the current reacts with the magnetic material included in the solid state hydrogen storage pellet to form an induction magnetic field, thereby heating the solid state hydrogen storage pellet.

For the purpose of enabling high-accuracy detection as to whether a molded resin product is a non-defective product or a defective product and advance detection of a molded resin product that may suffer deformation or the like in the future, the present invention relates to an inspection method and a manufacturing method for a molded resin product as well as an inspection device and a manufacturing device for a molded resin product, wherein, in an inspection of a joint interface of a molded resin product divided into a plurality of members, the height positions of defect candidates are measured from the results of detecting X rays radiated via at least two paths when the X rays are transmitted through the molded resin product, which makes it possible to detect a defect with high accuracy.

A method for storing and delivering hydrogen gas is described. The method includes reacting a chemical hydride with water in the presence of a synergist. The synergist advances the extent of reaction of the chemical hydride with water to increase the yield of hydrogen production. The synergist reacts with byproducts formed in the reaction of the chemical hydride with water that would otherwise inhibit progress of the reaction. As a result, a greater fraction of hydrogen available from a chemical hydride is released as hydrogen gas.

a fuel cell system without a high pressure line of a hydrogen supplying system, including a gas charging line formed between a gas charging station and a high pressure vessel charged with gas by the gas charging station, and a gas supplying line formed between the high pressure vessel and a stack, includes: a regulator provided in the gas supplying line; a solenoid valve provided in the gas supplying line between the regulator and the high pressure vessel; and a check valve provided in a bypass line connecting one point of the gas supplying line between the regulator and the solenoid valve and one point of the gas charging line.

A hydrogen storage system may include a storage container storing liquid hydrogen, a supply line connected to the storage container and to a fuel cell system, the supply line supplying gaseous hydrogen to the fuel cell system from the storage container, a compressor mounted in the supply line and compressing the gaseous hydrogen, a bypass line connecting the supply line and the storage container and allowing the gaseous hydrogen to flow from the supply line to the storage container, a control valve mounted in the bypass line and selectively adjusting a bypass flow rate of the gaseous hydrogen, an orifice provided in the bypass line, and a controller configured to control the control valve, accurately adjusting a supply pressure of the storage container and a supply amount of the hydrogen to be supplied to the fuel cell system based on the operation conditions of the fuel cell system.

An exhaust moisture removal system for an electric generation system including: a sorbent wheel; an interchanger; a hydrogen evaporator including an exhaust portion; and an exhaust outflow stream passageway configured to convey an exhaust from a hydrogen fuel cell of the electric generation system through a first pass and then through a second pass, the second pass being located downstream of the first pass, wherein the first pass of the exhaust outflow stream passageway passes through the sorbent wheel, then through the interchanger, and then through the hydrogen evaporator, and wherein the second pass of the exhaust outflow stream passageway passes through the hydrogen evaporator, then through the interchanger, and then through the sorbent wheel.