Explosion safety gap reduction with water curtain

Allason, Daniel; Medina, Clara Huéscar; Johnson, M. M.; Pękalski, Andrzej; Dutertre, Antoine; Mansfield, Duncan

doi:10.1016/j.jlp.2019.05.016

Cited by 6 publications

(2 citation statements)

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“…Conceptually, it is certainly possible for the combustion of a flammable cloud across a wide area with varying parameters (such as congestion, fuel composition or equivalence ratio) to result in a varying flame speed. For example, the combustion of a large stoichiometric gas cloud across congested areas separated by a safety gap, which is shown conceptually in Figure 3, is well known and has been extensively discussed in the literature (see for example, References 4 and 5).…”

Section: The General Concept Of An Episodic Deflagrationmentioning

confidence: 99%

The myth of episodic deflagration in large, unconfined vapor clouds

Abdel–jawad¹,

Gavelli²

2020

Process Safety Progress

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Reports and reviews issued by the Health and Safety Executive (HSE) have a wide‐ranging influence that extends well beyond the United Kingdom. One such recent document, RR1113 Review of Vapor Cloud Explosion Incidents, discusses explosions arising from the ignition of large vapor clouds. The report proposes a mechanism called “Episodic Deflagration” which has been proposed as an alternative to Deflagration to Detonation Transition (DDT). Here, we examine the concept and the assumptions behind this mechanism in detail. We examine fundamentals purported to characterize this mechanism such as the so‐called cumulative build‐up of pressure over time, an assumed stationary flame state and the radiant heating mechanism proposed as the basis for this postulated phenomenon. We show that the concept is fundamentally flawed and built on unrealistic assumptions, leading to the conclusion that this phenomenon should be ignored.

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Section: The General Concept Of An Episodic Deflagrationmentioning

confidence: 99%

The myth of episodic deflagration in large, unconfined vapor clouds

Abdel–jawad¹,

Gavelli²

2020

Process Safety Progress

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“…Thus, for instance, in 2012 the largest petroleum processing plant of Venezuela (Amuay Oil Refinery) shut down its operation completely for some time. Because of this tragedy, 41 persons were died and more than 80 persons were injured [6]. In the course of investigations in respect of organisation of the processes of planning at the FEC objects, it was established that planning of the FS measures is performed within the framework of the supplementary production process for the FS maintaining [7,8].…”

Section: Introductionmentioning

confidence: 99%

Substantiation of application of the strategic planning methods In order to improve efficiency of the automated systems of fire and explosion protection at the fuel and energy complex facilities In the special conditions

Samarin¹,

Grinyaev²,

Strogonov³

et al. 2021

J Appl Eng Science

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This paper presents substantiation of the obligatory application of the strategic planning methods in order to improve efficiency of the automated systems of fire and explosion protection (ASFEP) at the facilities of the fuel and energy complex (FEC) in the special conditions. To this end, the technological production process of the FEC facilities is divided into destructive and creative subprocesses. It is assumed that the events that cause the potentially dangerous situations, which are connected with fires and explosions, form the destructive subprocess. The activities, which are carried out within the framework of fire safety plans at the FEC facilities and which are controlled by the shift on duty, form the creative subprocess. Events of the first subprocess reduce efficiency of the ASFEP, while events of the second subprocess increase efficiency of this system. Authors of the article propose the continuous curve of recovery of the ASFEP efficiency in order to ensure modelling the type of influence of various rehabilitation measures. Two kinds of the exponential functions enveloping the moments of fire and rehabilitation are analysed for these subprocesses. The article describes the graph of actual rehabilitation of the ASFEP efficiency taking into account assumptions concerning nature of these functions. The total efficiency of the rehabilitation measures within the creative subprocess consists of the partial efficiencies of the measures, which are included to individual plans of various subsystems of the ASFEP (subsystems of the first and second levels). These partial shares of efficiency have been analysed from the point of view of their dependency on the period of performance of these measures, on their funding and management. It was established that management of the relevant measures, which is determined with the help of the strategic planning methods, is the most significant parameter in this model.

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