The invention relates to a plant and a method for producing liquefied hydrogen comprising a hydrogen gas generator, a liquefier, a feed line connecting an outlet of the hydrogen gas generator to an inlet of the liquefier, the liquefier comprising a refrigerator having a cycle circuit to cool the hydrogen gas from the feed line, the plant comprising a buffer store configured to store the compressed hydrogen gas between the hydrogen gas generator and the liquefier, the liquefier being configured to supply a cooling power and/or the liquefaction capacity that can be modified between at least two levels, the plant comprising a means for determining the fill level of the buffer store, the plant being configured to modify the cooling power and/or liquefaction capacity of the liquefier as a function of the fill level of the buffer store determined by the determining means.

The disclosure provides a method and system for optimizing production of a natural gas liquefaction process, the method comprising the steps of: selecting at least one manipulated variable (MV) for controlling the liquefaction process; selecting at least one control variable (CV), the at least one control variable at least comprising liquefied natural gas (LNG) throughput; providing at least one model, each model providing a dependency of the at least one control variable (CV) on the at least one manipulated variable (MV); using the at least one model to estimate LNG throughput for at least one of the manipulated variables (MV); obtaining process data from the liquefaction process, the process data at least including observed values of LNG throughput; creating a gain matrix based on said interdependencies; and using the gain matrix to optimize a process control system of the liquefaction process.

Methods for managing natural gas liquids (NGL) recovery systems may comprise receiving a dryout gas by at least one first exchanger, the at least one first exchanger being part of a first NGL recovery train; receiving the dryout gas from the at least one first exchanger by a first dehydrator; receiving the dryout gas from the first dehydrator by at least one second exchanger, the second exchanger being part of a second NGL recovery train; receiving the dryout gas from the at least one first exchanger and the at least one second exchanger by a third exchanger; and bypassing a flare burner by directing the dryout gas from the third exchanger to a gas sales compressor through a first bypass fluid conduit.

An apparatus and process for processing of a fluid (e.g. hydrogen) for liquefaction can permit a reduction in power consumption and also an improvement in operational efficiency in flexibility. Embodiments can be configured to account for large variations in feed to be provided for liquefaction and also permit operational cost reductions associated with liquefaction processing so the overall power consumption and operational cost for liquefaction can be greatly reduced while also providing improved operational flexibility. For instance, embodiments can be configured to feed a fluid to multiple liquefiers of a train of liquefiers based on a pre-selected set of feed routing criteria for improving power consumption and providing greater operational flexibility for liquefaction operations.

A fuel cell power-supply management device and a fuel cell power-supply management method enabling efficient recovery and utilization of boil-off gas. The fuel cell power-supply management device includes: a boil-off gas accumulation amount recognition unit that recognizes an accumulation amount of the boil-off gas in a boil-off gas accumulation unit; a demand status recognition unit that recognizes a demand status for each use of the boil-off gas; a boil-off gas recovery timing determination unit that determines a recovery timing of the boil-off gas accumulated in the boil-off gas accumulation unit, based on an accumulation amount of the boil-off gas recognized by the boil-off gas accumulation amount recognition unit or a demand status of the boil-off gas recognized by the demand status recognition unit; and a boil-off gas utilization processing arrangement unit that arranges utilization processing of the boil-off gas recovered from the boil-off gas accumulation unit at the recovery timing.

A system for processing gas streams has the form of, and is disposed in, an intermodal container. The container has a processing compartment with one or more cryogenic cells disposed in it, and is maintained in at least a partially evacuated condition, below atmospheric pressure. A second compartment has support equipment that is connected to the one or more cryogenic cells in the first compartment. Methods for managing such a system include maintaining the first compartment in the partially evacuated condition. In response to an increase in pressure within the first compartment, a controller may analyze the nature of the pressure increase. In case of fire or fire hazard, the controller may discharge inert gas from cores of the one or more cryogenic cells.

In a control system for a reliquefaction system for ships, boil-off gas generated from liquefied gas in an onboard storage tank is compressed by a compressor and the compressed boil-off gas is cooled and reliquefied through a heat exchanger. The control system includes: a reliquefaction line connecting the compressor to the storage tank; a control valve disposed downstream of the heat exchanger on the reliquefaction line to adjust a flow rate of boil-off gas flowing through the reliquefaction line; a flow rate regulator configured to control a degree of opening of the control valve; and a load controller configured to send a signal for adjusting a load of the reliquefaction system to the flow rate regulator, wherein, in the event of changes in load of the reliquefaction system, the load controller sends a predetermined set point indicative of a boil-off gas flow rate at a corresponding load.

Techniques for generating a personalized reference sequence construct for an individual to align sequence reads obtained for the individual. The techniques include: obtaining a plurality of sequence reads for an individual; obtaining information identifying a plurality of locations; genotyping the plurality of sequence reads for the plurality of locations to obtain a first set of variants for the individual for at least some of the plurality of locations; identifying a second set of variants associated with the first set of variants; generating a personalized reference sequence construct using the second set of variants; and aligning the plurality of sequence reads to the personalized reference sequence construct.