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: The present disclosure provides systems and methods for generating and storing hydrogen and electricity. The systems generally include an electrolyzer stack, a fuel cell stack operably connected to the electrolyzer stack, and a hydrogen recirculation stack operably connected to the electrolyzer stack and to the fuel cell stack.

Abstract: A power generation system includes a power source that is configured to communicate with at least one of a downstream load or a downstream device by changing a voltage on a power bus between the power source and the at least one of the downstream load or the downstream device, while power source provides power on the power bus to the at least one of the downstream load or the downstream device.

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: 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: A fuel cell system having a power module including at least one fuel cell segment, an input output module including at least one inverter, a rectifier, and an electric distribution module having at least a first electrical connector and a second electrical connector. The at least one fuel cell segment may be electrically connected to the at least one inverter and may be electrically connected to an information technology (IT) load via a split bus. The at least one inverter may be electrically connected to an alternating current (AC) source via the first electrical connector of the electric distribution module. The rectifier may be electrically connected to the AC source via the second electrical connector of the electric distribution module and may be electrically connected to the IT load via the split bus.

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

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 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 for monitoring, assessing, and/or controlling hydrogen production are described. For instance, a system for monitoring, assessing, and/or controlling hydrogen production may include: a plurality of electrolyzers; and a controller configured to: obtain raw data indicative of respective operations of respective electrolyzers of the plurality of electrolyzers over a period of time; obtain command data indicative of one or more commands provided to the plurality of electrolyzers over the period of time; obtain event data indicative of one or more events related to the plurality electrolyzers that occurred during the period of time; generate state data based on the raw data, the command data, and the event data, the state data comprising a respective state of each electrolyzer of the plurality of electrolyzers for each of a number of discrete time periods of the period of time; and perform one or more operations responsive to the state data.

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 method includes electrolyzing water into hydrogen, combining the hydrogen with nitrogen to generate forming gas, delivering the forming gas to a reducing environment zone, and processing an intermediate material into a product material in the reducing environment zone. The step of processing the intermediate material into the product material may include processing a glass melt into a float glass ribbon on a tin melt and then cooling the float glass ribbon into sheet glass.

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 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 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: 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 power generation system includes a power source that is configured to communicate with at least one of a downstream load or a downstream device by changing a voltage on a power bus between the power source and the at least one of the downstream load or the downstream device, while power source provides power on the power bus to the at least one of the downstream load or the downstream device.

Abstract: The present disclosure relates to systems and methods for drying materials using hydrogen combustion exhaust. The system generally includes a hydrogen generator, a burner, and a drying chamber. The method generally includes burning hydrogen and directing the combustion exhaust to a drying chamber, wherein the heat from the combustion exhaust dries the material.

Abstract: The present disclosure relates to systems and methods for controlling hydrogen stack power and load. The systems include at least one hydrogen stack, a pressure sensor, and a controller, wherein the controller is operable to increase or decrease the power to the at least one hydrogen stack in response to a change in pressure. The methods include generating hydrogen using at least one hydrogen stack, measuring the pressure of the generated hydrogen, and increasing or decreasing the power supplied to the at least one hydrogen stack in response to an increase or decrease in the pressure.