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This disclosure provides a system to monitor leak rates of direct buried gaseous hydrogen storage systems.
Method of Leak Detection for
Direct Buried Storage of Hydrogen Gas
This disclosure provides a
system to monitor leak rates of direct buried gaseous hydrogen storage
The disclosure includes a
method of collecting hydrogen gas if it has escaped from a direct buried
hydrogen storage container. A porous
fill material (1) (e.g. sand) that allows the hydrogen gas to pass through it
to a collection structure above the underground storage container. The collection structure (2) is made of a non-porous
material that covers the underground storage unit(s) and may be integrated into
the fueling pad. The collection
structure is designed to direct the escaped hydrogen to one or more vent
The disclosure includes a system to monitor the hydrogen gas
concentration (4) at the collection points in the collection structure. The monitoring system senses the
concentration of hydrogen gas and alerts the site operator when a configurable
concentration threshold has been exceeded.
The disclosure includes a system to vent (5) the
escaped hydrogen gas away from ignition sources. The vent consists conduit system with an inlet at each collection
point in the collection structure and an outlet sufficiently removed for
ignition sources. The outlet is
protected to prevent inadvertent blockage.
The disclosure includes a system
to isolate and monitor the leak rates of individual hydrogen tanks (6) within
the underground storage system. Each
tank in the sys...