[ safety ]
Vent to Atmosphere
Inert Gas Inlet
|
Pressure Relief Valve |
|
|
Vent Control Valve |
Pressure Switch Low
Pressure Transmitter
|
Vent to Atmosphere |
Pressure Switch High |
From Entrance Arrangement |
To Burner
Pressure Control Valve |
Safety Shutoff Valves |
Flow Element and Transmitter |
Flow Control Valve |
Outlet Isolation |
Fig . 2 . Gas train components leading up to the burner , including pressure and flow control , safety shutoff valve , and vent piping
technologies , provides more detailed information about the efficacy of specific leak detection technologies for indoor and outdoor use , as well as the potential for the odorization of hydrogen .
Important to a hydrogen gas train is the use of a flame camera or sensor equipped with an audiovisual alarm that can notify personnel of a problem area and trigger emergency shutdown and / or evacuation procedures . Hydrogen flames are often invisible or difficult to see with the naked eye , especially in daylight or under artificial lighting . Flame cameras designed for hydrogen flame detection monitor the radiation emitted by the flame in the ultraviolet ( UV ) and infrared ( IR ) spectral bands . These cameras are suitable for both indoor and outdoor use , and multiple cameras can be strategically installed to ensure full visual coverage of the area where hydrogen is stored and transported . These cameras typically have a wide field of view (~ 130 °) and a range of less than 20 m ( 65 ft ). 11
Conclusion
The design of a hydrogen gas train is similar to that of any other gaseous fuel train , with the addition of online and external safety equipment and systems . Material selection should primarily be based on the operating pressure and temperature of the hydrogen system , while considering the potential for hydrogen embrittlement . The equipment and instrumentation included aim to ensure the removal of any residual liquid and particulate matter , delivery of gas to the burner at the correct pressure and flow rate , safe system shutdown and depressurization in case of over pressurization , and the ability to purge the system when necessary . Leak detectors , combined with routine inspections , can be used to identify potential leaks for safety and efficiency . A flame camera or sensor with an audiovisual alarm should notify personnel of problem areas and trigger emergency shutdown and / or evacuation procedures .
It is important to note that the standards and technologies identified in this article provide a non-exhaustive representation of the extensive information and practices available to draw upon when designing a gas train system . The strictest standards from organizations such as the National Fire Protection Association , the Compressed Gas Association , the Environmental Protection Agency , as well as local agencies or regulators should be followed . This article serves solely for informational purposes and should by no means be used as the basis for design and engineering . As safety standards evolve with a growing understanding of hydrogen systems , it is essential to routinely review and adhere to the most up-to-date standards .
28 Hydrogen Tech World | Issue 11 | August 2023