Ignition of gas/air mixtures by discharges between electrostatically charged plastic surfaces and metallic electrodes

Glor, Martin

doi:10.1016/0304-3886(81)90064-4

Cited by 48 publications

(8 citation statements)

References 4 publications

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“…The same trends have been shown for gases (see e.g., Blanc et al . and Glor ). Because the ignition energy needed increases with a reduction in oxygen concentration, the probability for fire occurring is lowered with a reduction in oxygen concentration; it can be compared with removing some of the ignition sources.…”

Section: Resultsmentioning

confidence: 94%

Advantages and challenges with using hypoxic air venting as fire protection

Nilsson

Hees

2013

Fire and Materials

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The use of hypoxic air venting system as fire protection is increasing and is sometimes used to replace traditional extinguishing systems. An oxygen level of 15% is generally used because a lower concentration could pose serious health risks. On the request of the Swedish Radiation Safety Authority, a literature review was conducted to determine advantages and challenges with the system and further research needs. The main advantages with a reduced oxygen environment are the reduced probability of ignition and lowered heat release rate. However, at 15% oxygen level, risk for fire still exists, and the system cannot be seen as an alternative to extinguishing systems. Reduced oxygen environment also results in higher production rates of soot and smoke, and there is limited knowledge regarding the effect of fuel configuration and fire behavior of products. In addition, a first evaluation of the test method specified in the hypoxic air venting standards was carried out through testing. The testing showed that the particleboard passed the test criteria at normal atmosphere even though it is commonly known that a particleboard burns in normal air. It is concluded that the test method has deficiencies, and there is clearly a need for development of the test method to guarantee safety levels.

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Section: Resultsmentioning

confidence: 94%

Advantages and challenges with using hypoxic air venting as fire protection

Nilsson

Hees

2013

Fire and Materials

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“…This means that the estimated maximum energy of a brush discharge can be greater than 1.4 mJ, a high enough level to ignite a flammable gas or vapor. In some cases, a brush discharge may have an equivalent energy of 3e4 mJ (Glor, 1981). Therefore, this method should not be used if the powder contains a flammable liquid (solvent-wet powder) or the powder is highly sensitive to an electrostatic spark (with minimum ignition energy less than 3 mJ, for example).…”

Section: Discussionmentioning

confidence: 99%

Suppression of cone discharges in a powder silo using a grounded metal rod

Yamaguma

Choi

Mogami

2010

Journal of Loss Prevention in the Process Industries

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“…In the case of one specific powder MIKE3 tests were also carried out in a mixture of 14 vol% oxygen and 86 vol% nitrogen, and even in this case, it was found that MIE was o1 mJ. According to Glor (1981), MIE of mixtures of stoichiometric propane/oxygen/nitrogen increases by about one order of magnitude when the volumetric ratio of oxygen to nitrogen is reduced from 21/79 (air) to 14/86. Assuming a similar tendency for dusts, this would indicate that MIE in air of the specific powder studied by Ackroyd may have been even less than 0.1 mJ.…”

Section: Determination Of Mies Of a Range Of Very Ignitionsensitive Pmentioning

confidence: 92%