Abstract: The present disclosure relates to circuits for connecting components of a hydrogen plant to a power grid to power the components in an efficient manner. In one implementation, power-side alternate current (AC) to direct current (DC) converters may be connected to a source power grid without the need for an isolation transformer by providing separate buses between the power-side AC-DC converters and load-side DC-DC converters instead of a shared DC bus between the converters. Other implementations for connecting components of a hydrogen plant to a power grid may include an adjustable transformer, such as a tappable transformer or an autotransformer, to connect any number of auxiliary loads of the plant to the power grid. The adjustable transformer may provide for various types of auxiliary load devices to connect to the power provided by the transformer at the same time, including both three-phase devices and one-phase devices.

Abstract: A method of forming a fuel cell interconnect includes depositing a Cr alloy powder, sintering the Cr alloy powder, and repeating the depositing and the sintering to form the fuel cell interconnect. The Cr alloy powder may include a pre-alloyed powder containing from about 4 wt. % to about 6 wt. % Fe, and from about 94 wt. % to about 96 wt. % Cr.

Abstract: Provided herein are systems and methods for generating hydrogen and ammonia. The hydrogen is generated in an anion exchange membrane-based electrochemical stack. The hydrogen generated in the stack may be used to generate ammonia or may be used for other applications requiring hydrogen. The feedstock for the anion exchange membrane-based electrochemical stack may be saline water, such as seawater. A desalination module or a chlor-alkali stack may be used to treat the saline water prior to electrolysis in the anion exchange membrane-based electrochemical stack.

Abstract: The systems and methods described herein provide for control of hydrogen generation based on one or more characteristics of an input power signals, including a voltage of the input power signal and/or a frequency of the input power signal. The hydrogen generation system may be controlled in response to a reactive power consumption of the hydrogen generation system and/or a reactive power component of a power grid providing energy to the hydrogen generation system. In one embodiment, the hydrogen generation system may be controlled to generate reactive power in circumstances in which a voltage an input power signal is less than or more than a voltage range. In another embodiment, the hydrogen generation system may control hydrogen production based on a frequency of the input power signal.

Abstract: A system and method of power management for a power generation system is disclosed. A method of power management for a hydrogen generation system including one or more electrochemical stacks, the one or more electrochemical stacks receiving power from an electrical grid including at least one power source, includes: receiving a frequency or voltage reference value for the hydrogen generation system; continually monitoring a frequency or voltage of the electrical grid; and varying a load of the hydrogen generation system in response to the frequency or voltage of the electrical grid differing from the frequency or voltage reference value to restore the frequency or voltage of the electrical grid to the frequency or voltage reference value.

Abstract: The systems and methods described herein provide for a hydrogen generation system that includes one or more gas-detecting sensors for measuring the concentration of gases within or associated with the hydrogen generation system. The obtained measurements may be utilized for many purposes by a controller or control system of the hydrogen generator. When such concentrations are measured, one or more remedial actions may be executed on the generator to prevent the unsafe operating condition. Further, many such safety gas sensors may be associated with a corresponding redundant gas sensor such that measurements from the gas sensor and the redundant gas sensor may be compared to determine a difference between the two measurements which may indicate an operational state of the hydrogen generator. The gas measurements from the sensors may also be analyzed to obtain data and information of an operational status of the hydrogen generator.

Abstract: Systems and techniques are described herein for controlling hydrogen production. For instance, a method for controlling hydrogen production is provided. The method may include determining an amount of power for a hydrogen-production installation to consume based on one or both of an amount of power produced by a power producer or an amount of power consumed by a power consumer; and controlling hydrogen production at one or more electrolyzers of the hydrogen-production installation such that the one or more electrolyzers consume substantially the determined amount of power.

Abstract: The systems and methods described herein provide for a mission critical control of a hydrogen generation system to ensure a downstream receiver receives a critical amount of hydrogen from the system and/or a hydrogen storage tank. In one implementation, a status of a hydrogen storage tank may be compared to a mission critical threshold value and hydrogen may be supplied to the tank to ensure the hydrogen does not fall below the threshold value. Further, the hydrogen generator may utilize reliable sources of energy, such as grid power, to refill a storage tank in response to the tank being below a threshold value. At other times, however, the hydrogen generator may utilize renewable sources of energy to provide a more eco-friendly hydrogen producing system.

Abstract: Systems and techniques are described herein for producing hydrogen. For instance, a method for producing hydrogen is provided.

Abstract: A method and system for distributing power to a hydrogen generation system including a plurality of electrochemical stacks is disclosed. The method includes receiving a hydrogen generation request including an amount of hydrogen to produce during a particular time interval; receiving status data regarding the plurality of electrochemical stacks; selecting a set of electrochemical stacks of the plurality of electrochemical stacks that can fulfil the hydrogen generation request based, at least in part, on the status data; selecting a power distribution for the set of electrochemical stacks; and coupling the set of electrochemical stacks to the selected power distribution.

Abstract: A system for generating hydrogen includes one or more processors operatively connected a hydrogen generator capable of being powered by a plurality of different power sources and a non-transitory computer-readable medium storing instructions that, when executed by the one or more processors, cause the one or more processors to: receive a first request to generate a first quantity of hydrogen; select a first one or more power sources of the plurality of different power sources to minimize a cost of generating the first quantity of hydrogen; connect the hydrogen generator to receive power from the first one or more power sources; and instruct the hydrogen generator to generate the first quantity of hydrogen using the first one or more power sources.

Abstract: The systems and methods described herein provide high-precision control of hydrogen generation and electricity use, thereby increasing the efficiency of the overall process. The system may include a power source that includes a rectifier for converting an alternating current input power signal to a direct current power signal. The direct current power signal may also be converted to a voltage level through a converter as an output to a vehicle network. A hydrogen generating system may also produce and provide hydrogen to the vehicle network. In some implementations, the vehicle network may include one or more electrical vehicles, hydrogen fuel-based vehicles, or hybrid hydrogen/electrical vehicles.

Abstract: Systems and techniques are described herein. For instance, a method for producing hydrogen is described. The method includes determining an amount of reactive power for an electrolyzer of a hydrogen-production installation connected to a power grid to generate, or to consume; and controlling operations of the electrolyzer such that electrolyzer generates, or consumes, substantially the determined amount of reactive power. Additionally, a system for producing hydrogen is described. The system includes a connection to a power grid configured to receive electrical power from the power grid; one or more electrolyzers configured to receive the electrical power and to produce hydrogen; and a controller configured to: determine an amount of reactive power for the one or more electrolyzers to generate, or to consume; and control respective operations of the one or more electrolyzers such that the one or more electrolyzers collectively generate, or consume, substantially the determined amount of reactive power.

Abstract: A fuel cell system includes at least one of plural electrochemical pump separators to separate carbon dioxide from a fuel exhaust stream or a combination of a gas separator and a fuel exhaust cooler located outside a hotbox.

Abstract: A system for hydrogen generation includes at least one cabinet defining a first volume, a second volume, and a third volume, where the first volume, the second volume and the third volume are fluidically isolated from each other, a water circuit located in the first volume, an electrochemical module including an electrolyzer electrochemical stack located in the second volume, a hydrogen circuit located in the third volume, at least one first fluid connector fluidly connecting the water circuit and the electrolyzer electrochemical stack, and at least one second fluid connector fluidly connecting the electrolyzer electrochemical stack and the hydrogen circuit.

Abstract: A modular system for hydrogen generation includes a plurality of cores and a hub. Each core includes an electrolyzer and a power supply. The power supply is operable to manage electrical power to the electrolyzer of the core and is redundant to the power supply of at least another one of the plurality of cores. The hub includes a water module, a heat exchange module, and a switchgear module. The water module includes a water source in fluid communication with the electrolyzer of each one of the plurality of cores, the heat exchange module includes a heat exchanger in thermal communication with the electrolyzer of each one of the plurality of cores, and the switchgear module includes a switch activatable to electrically isolate the power supply of each one of the plurality of cores.

Abstract: A method includes providing raw water into a first filter assembly to remove solids from the raw water to form a filtrate, providing the filtrate from the first filter assembly into a second filter assembly to electrochemically remove ionics from the filtrate to form purified water, and providing the purified water to an electrolyzer to generate hydrogen by electrolyzing the purified water.

Abstract: Described herein are membrane assemblies for use in generating hydrogen and oxygen. The membrane assemblies include a cation exchange membrane, an anion exchange membrane, and a hydrophilic layer disposed between the anion exchange membrane and the cation exchange membrane.

Abstract: A modular system for hydrogen generation includes a plurality of cores and a hub. Each core includes an electrolyzer and a power supply. The power supply is operable to manage electrical power to the electrolyzer of the core and is redundant to the power supply of at least another one of the plurality of cores. The hub includes a water module, a heat exchange module, and a switchgear module. The water module includes a water source in fluid communication with the electrolyzer of each one of the plurality of cores, the heat exchange module includes a heat exchanger in thermal communication with the electrolyzer of each one of the plurality of cores, and the switchgear module includes a switch activatable to electrically isolate the power supply of each one of the plurality of cores.

Abstract: A fuel cell stack includes stacked solid oxide fuel cells, interconnects disposed between the fuel cells, and dielectric layers disposed on the interconnects and including a first glass-containing component and a corrosion barrier material. Optionally, the dielectric layers may cover only a portion of the interconnect riser seal surfaces which are covered by riser seals. Additionally or alternatively, the fuel cell stack may include an electrolyte reinforcement layer on the electrolyte of the solid oxide fuel cells.