Surface effects on flammable extent of hydrogen and methane jets

Hourri, A.; Angers, B.; Bénard, Pierre

doi:10.1016/j.ijhydene.2008.11.088

Cited by 18 publications

(11 citation statements)

References 8 publications

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“…It should be noted that only free jet is considered in the simulation model of this study and the distance changes by the effect of obstacles in the environment. Especially, it was reported that the distance from a jet released in close proximity to ground is longer than that from a free jet [38][39][40]. 3.…”

Section: Resultsmentioning

confidence: 99%

Simplified approach to evaluating safety distances for hydrogen vehicle fuel dispensers

Hirayama

Ito

Kamada

et al. 2019

International Journal of Hydrogen Energy

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Section: Resultsmentioning

confidence: 99%

Simplified approach to evaluating safety distances for hydrogen vehicle fuel dispensers

Hirayama

Ito

Kamada

et al. 2019

International Journal of Hydrogen Energy

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“…In case of 10 kg release of CH 2 , Rigas and Sklavounos (2005) simulate a cloud within LFL having a diameter of about 20 m which lifts very rapidly vertically. In case of a jet exiting a 200 bar tank from a 10 m hole, Brennan et al (2011), comparing a number of experimental studies, report a length of the envelope to 4 per cent vol concentration of about 50 m. Hourri et al (2009) simulate the LFL extent of horizontal hydrogen jets from a 8.48 mm hole and a 284 bar tank with a 0.99 kg/s flow rate obtaining values ranging from 40 to 60 m. Rosyid (2006), instead, computes a 46.2 m effect distance for a leak in a 225 kg tank, 2.7 m for a relief valve discharge, 8.2 m for a rupture disk or vapour line discharge. Most of the above figures refer to the length of the major axis of the resulting hydrogen cloud, which, in case of delayed ignition and a continuous release assumes an elongated shape due to wind effects.…”

Section: Transportation Risk Estimation and Economic Modelmentioning

confidence: 99%

Impact of accidents risk on hydrogen road transportation cost

Caputo

Pelagagge²,

Salini³

2011

Int J of Energy Sector Man

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PurposeThe purpose of this paper is to estimate delivered hydrogen cost including both transport and expected accidents cost comparing compressed gas or liquid hydrogen road transport. The model allows to determine whether, in a given context, the risk of accidents is an influencing variable in the selection of the hydrogen transport mode. It also helps to select the lowest cost transport mode and route.Design/methodology/approachTransportation cost models are developed and integrated with a risk analysis model to determine expected accidents cost so that an overall delivered hydrogen cost can be computed. Alternative transport modes are compared on the basis of hydrogen demand, delivery distance and route type.FindingsWhile safety cost in many cases can be considered negligible with respect to overall hydrogen transport cost, there are cases (high flow rate, long distance) where accident cost is relevant, especially in routes through densely populated areas. In such cases, factoring in accidents cost may significantly affect the break even point between CH2 and LH2 transport alternatives.Research limitations/implicationsThe paper only deals with proven road transportation methods (CH2 and LH2). Inclusion of alternative transport modes such as pipeline or hydrides is a future research goal.Practical implicationsDecision makers can examine the costs implied by hydrogen transportation alternatives in different economic scenarios factoring in safety costs to make informed decision.Originality/valueAvailable hydrogen transportation cost models neglect any safety issue, while risk assessment models only consider accident consequences costs. This work integrates both views.

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“…Considering two different storage pressure and several distances of the source from the surface. Hourri et al (2009) investigated numerically the effect that the ground and a side wall have on methane and hydrogen unignited high-pressure jets. The aim has been to compare how gases with different behaviour, released from sources with different orientations, are affected by the solid surface.…”

Section: Introductionmentioning

confidence: 99%