Self-ignition and explosion during discharge of high-pressure hydrogen

Mogi, Tatsushi; Kim, Dongjoon; Shiina, Hiroumi; Horiguchi, S.

doi:10.1016/j.jlp.2007.06.008

Cited by 149 publications

(57 citation statements)

References 2 publications

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“…Some geometries appear to be less affected by that process, in which case ignition is more independent from the way the diaphragm bursts. This result differs from the literature [4][5][6], which states that in a longer tube, ignition is more probable at lower hydrogen pressure. This discrepancy will require further research, conducted with several tubes and with various types of diaphragm.…”

Section: Influence Of Extension Tube Geometry On Critical Value Of Hycontrasting

confidence: 99%

“…The difference between these two lines depends on the extension tube length, and is in the range of 1.5-11.5%. When compared with the results by Golub et al [4] and Mogi et al [6], the current experiments result in lower critical hydrogen pressure for given extension tube lengths.…”

Section: Influence Of Extension Tube Geometry On Critical Value Of Hysupporting

confidence: 71%

“…An extension tube can be attached to the container. Extension tubes of various geometries have been tested in experimental and numerical investigations [4][5][6]. The extension tube tested in the current research consists of two parts: a first one, with diameter 10 and 10 mm long, placed immediately behind the diaphragm, and a second one connected to the first one, with various diameters and lengths.…”

Section: Experimental Facilitymentioning

confidence: 99%

“…Numerous papers focusing upon hydrogen safety and concerned with high-pressure hydrogen jet ignition have been recently published, such as Golub et al and Mogi et al [4][5][6][7][8][9] who conducted experimental work, or numerical investigation [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Ignition during hydrogen release from high pressure into the atmosphere

Oleszczak

Wolański

2010

Shock Waves

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The first investigations concerned with a problem of hydrogen jet ignition, during outflow from a high-pressure vessel were carried out nearly 40 years ago by Wolanski and Wojcicki. The research resulted from a dramatic accident in the Chorzow Chemical Plant Azoty, where the explosion of a synthesis gas made up of a mixture composed of three moles of hydrogen per mole of nitrogen, at 300 • C and 30 MPa killed four people. Initial investigation had excluded potential external ignition sources and the main aim of the research was to determine the cause of ignition. Hydrogen is currently considered as a potential fuel for various vehicles such as cars, trucks, buses, etc. Crucial safety issues are of potential concern, associated with the storage of hydrogen at a very high pressure. Indeed, the evidence obtained nearly 40 years ago shows that sudden rupture of a highpressure hydrogen storage tank or other component can result in ignition and potentially explosion. The aim of the present research is identification of the conditions under which hydrogen ignition occurs as a result of compression and heating of the air by the shock wave generated by discharge of high-pressure hydrogen. Experiments have been conducted using a facility constructed in the performed to determine critical conditions for occurrence of high-pressure hydrogen ignition. The results show that a critical pressure exists, leading to ignition, which depends mainly on the geometric configuration of the outflow system, such as tube diameter, and on the presence of obstacles.

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Section: Influence Of Extension Tube Geometry On Critical Value Of Hycontrasting

confidence: 99%

Section: Influence Of Extension Tube Geometry On Critical Value Of Hysupporting

confidence: 71%

Section: Experimental Facilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ignition during hydrogen release from high pressure into the atmosphere

Oleszczak

Wolański

2010

Shock Waves

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“…When hydrogen gas is mixed with air, it may self-ignite. (2) It is difficult to see the hydrogen flame in daylight since it produces a pale blue color. (3) Considering that the hydrogen flame emits a strong ultraviolet-C (UV-C) radiation (200-280 nm), which has a solar-blind property, detecting the hydrogen flame at sea level even in daylight can be realized.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Flame Detector with Bioinspired Optoelectronic Integrated Circuit and Field-Programmable Gate Array Using Integrated Three-Dimensional System Architecture

Oktavianto¹,

Yamane²,

Sekiguchi³

et al. 2017

Sensors and Materials

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We introduce an integration concept between a bioinspired optoelectronic integrated circuit (OEIC) and a field-programmable gate array (FPGA) to realize a single-chip smart ultraviolet (UV) imaging sensor. The bioinspired OEIC stacks the Pt/n-Al 0.49 Ga 0.51 N backside-illuminated (BSI) Schottky barrier diode (SBD) photodiode array onto the complementary metal oxide semiconductor (CMOS) edge detection circuits (EDCs). The EDC mimics the outer vertebrate retina that has the purpose of reducing the digital analysis information by extracting the edge from the detected object before being processed by the FPGA, and thus decreasing the power consumption. The binary images produced by the bioinspired OEIC are analyzed in the FPGA using a histogram projection circuit to generate information about the location, size, moving speed, moving direction, and spreading status of the detected object, which is the UV radiation coming from the hydrogen flames. In this study, an EDC chip of 1 × 16 pixels was fabricated and integrated with the FPGA using wires. We evaluated the speed calculation performance of the system with a moving object in the range of 1.7-2,049 pixels/s.

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Full-scale experiments to study shock waves generated by the rupture of a high-pressure pipeline

Long

et al. 2016

Proc. Safety Prog.

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Large-scale experimental investigations were conducted on the flow structures and intensity of shock waves generated by the rupture of a high-pressure pipeline. In the experiments, the bursting of pipes was caused by an initial crack introduced on the upper center of the pipe. The crack velocity, pressure-time trace and explosion overpressure were measured. The intensity of the far-field explosion overpressure was estimated based on the extent of damage to buildings. The results demonstrated that the shock waves generated by a pipeline rupture indicate an extremely strong directional effect in the near-field, and their measured speeds were similar to the speeds calculated from theory. Not all of the gas energy participates in the explosion of a long pipeline, and an equation is established to calculate the gas energy involved in a pipeline blast. The TNT equivalency approach was used to calculate the explosion overpressure, and the impulse generated by the pipeline rupture and its applicability were discussed.

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Self-ignition and explosion during discharge of high-pressure hydrogen

Cited by 149 publications

References 2 publications

Ignition during hydrogen release from high pressure into the atmosphere

Ignition during hydrogen release from high pressure into the atmosphere

Hydrogen Flame Detector with Bioinspired Optoelectronic Integrated Circuit and Field-Programmable Gate Array Using Integrated Three-Dimensional System Architecture

Full-scale experiments to study shock waves generated by the rupture of a high-pressure pipeline

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