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Uli Barth - One of the best experts on this subject based on the ideXlab platform.
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Suitability of Ignition Source “exploding wire” for determination of dust explosion characteristics in the 20-L-sphere
Journal of Loss Prevention in The Process Industries, 2013Co-Authors: Marc Scheid, Christian Kusche, Volkmar Schröder, Uli BarthAbstract:Abstract Several safety characteristics of dusts are determined in the 20-L-sphere (also known as SIWEK Chamber) according to international standards. Dust cloud Ignition is carried out using pyrotechnical igniters. Due to various disadvantages of such igniters the need for alternative Ignition Sources arises again and again. An alternative could be an Ignition Source which is known as “exploding wire” or “fuse wire”. The paper presents test results of a comparative study between both Ignition Sources for the determination of the safety characteristics “Maximum Explosion Pressure” and “Maximum Rate of Explosion Pressure Rise” of five selected dusts in the 20-L-sphere. In addition to that the Ignition mechanisms of both Ignition Sources were analyzed by high speed camera recordings and the Ignition energy was determined with electric and calorimetric recordings. The paper shows results of measurements of the Ignition energy of both Ignition Sources as well as sequences of the flame propagation.
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Tests on Suitability of the Ignition Source “exploding Wire” for the Determination of Explosion Characteristics of Combustible Dusts in the 20-l-sphere
Chemical engineering transactions, 2013Co-Authors: Marc Scheid, Christian Kusche, V. Schroeder, Uli BarthAbstract:Tests on Suitability of the Ignition Source “Exploding Wire” for the Determination of Explosion Characteristics of Combustible Dusts in the 20-L-Sphere Marc Scheid*, Christian Kusche, Volkmar Schroder, Uli Barth a Federal Institute for Materials Research and Testing (BAM), Department 2 “Chemical Safety Engineering”, D-12200 Berlin, Germany b Bergische Universitat Wuppertal, Chair “Methods of Safety Engineering and Incident Research”, D-42119 Wuppertal, Germany marc.scheid@bam.de
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Suitability of Ignition Source "exploding wire" for determination of dust explosion characteristics in the 20-L-sphere
Journal of Loss Prevention in the Process Industries, 2013Co-Authors: Marc Scheid, Christian Kusche, Volkmar Schröder, Uli BarthAbstract:Several safety characteristics of dusts are determined in the 20-L-sphere (also known as SIWEK Chamber) according to international standards. Dust cloud Ignition is carried out using pyrotechnical igniters. Due to various disadvantages of such igniters the need for alternative Ignition Sources arises again and again. An alternative could be an Ignition Source which is known as "exploding wire" or "fuse wire". The paper presents test results of a comparative study between both Ignition Sources for the determination of the safety characteristics "Maximum Explosion Pressure" and "Maximum Rate of Explosion Pressure Rise" of five selected dusts in the 20-L-sphere. In addition to that the Ignition mechanisms of both Ignition Sources were analyzed by high speed camera recordings and the Ignition energy was determined with electric and calorimetric recordings. The paper shows results of measurements of the Ignition energy of both Ignition Sources as well as sequences of the flame propagation. © 2013 Elsevier Ltd.
Marc Scheid - One of the best experts on this subject based on the ideXlab platform.
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Suitability of Ignition Source “exploding wire” for determination of dust explosion characteristics in the 20-L-sphere
Journal of Loss Prevention in The Process Industries, 2013Co-Authors: Marc Scheid, Christian Kusche, Volkmar Schröder, Uli BarthAbstract:Abstract Several safety characteristics of dusts are determined in the 20-L-sphere (also known as SIWEK Chamber) according to international standards. Dust cloud Ignition is carried out using pyrotechnical igniters. Due to various disadvantages of such igniters the need for alternative Ignition Sources arises again and again. An alternative could be an Ignition Source which is known as “exploding wire” or “fuse wire”. The paper presents test results of a comparative study between both Ignition Sources for the determination of the safety characteristics “Maximum Explosion Pressure” and “Maximum Rate of Explosion Pressure Rise” of five selected dusts in the 20-L-sphere. In addition to that the Ignition mechanisms of both Ignition Sources were analyzed by high speed camera recordings and the Ignition energy was determined with electric and calorimetric recordings. The paper shows results of measurements of the Ignition energy of both Ignition Sources as well as sequences of the flame propagation.
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tests on suitability of the Ignition Source â œexploding wireâ for the determination of explosion characteristics of combustible dusts in the 20 l sphere
Chemical engineering transactions, 2013Co-Authors: Marc Scheid, Christian Kusche, V. Schroeder, U BarthAbstract:Tests on Suitability of the Ignition Source “Exploding Wire” for the Determination of Explosion Characteristics of Combustible Dusts in the 20-L-Sphere Marc Scheid*, Christian Kusche, Volkmar Schroder, Uli Barth a Federal Institute for Materials Research and Testing (BAM), Department 2 “Chemical Safety Engineering”, D-12200 Berlin, Germany b Bergische Universitat Wuppertal, Chair “Methods of Safety Engineering and Incident Research”, D-42119 Wuppertal, Germany marc.scheid@bam.de
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Tests on Suitability of the Ignition Source “exploding Wire” for the Determination of Explosion Characteristics of Combustible Dusts in the 20-l-sphere
Chemical engineering transactions, 2013Co-Authors: Marc Scheid, Christian Kusche, V. Schroeder, Uli BarthAbstract:Tests on Suitability of the Ignition Source “Exploding Wire” for the Determination of Explosion Characteristics of Combustible Dusts in the 20-L-Sphere Marc Scheid*, Christian Kusche, Volkmar Schroder, Uli Barth a Federal Institute for Materials Research and Testing (BAM), Department 2 “Chemical Safety Engineering”, D-12200 Berlin, Germany b Bergische Universitat Wuppertal, Chair “Methods of Safety Engineering and Incident Research”, D-42119 Wuppertal, Germany marc.scheid@bam.de
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Suitability of Ignition Source "exploding wire" for determination of dust explosion characteristics in the 20-L-sphere
Journal of Loss Prevention in the Process Industries, 2013Co-Authors: Marc Scheid, Christian Kusche, Volkmar Schröder, Uli BarthAbstract:Several safety characteristics of dusts are determined in the 20-L-sphere (also known as SIWEK Chamber) according to international standards. Dust cloud Ignition is carried out using pyrotechnical igniters. Due to various disadvantages of such igniters the need for alternative Ignition Sources arises again and again. An alternative could be an Ignition Source which is known as "exploding wire" or "fuse wire". The paper presents test results of a comparative study between both Ignition Sources for the determination of the safety characteristics "Maximum Explosion Pressure" and "Maximum Rate of Explosion Pressure Rise" of five selected dusts in the 20-L-sphere. In addition to that the Ignition mechanisms of both Ignition Sources were analyzed by high speed camera recordings and the Ignition energy was determined with electric and calorimetric recordings. The paper shows results of measurements of the Ignition energy of both Ignition Sources as well as sequences of the flame propagation. © 2013 Elsevier Ltd.
Christian Kusche - One of the best experts on this subject based on the ideXlab platform.
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Suitability of Ignition Source “exploding wire” for determination of dust explosion characteristics in the 20-L-sphere
Journal of Loss Prevention in The Process Industries, 2013Co-Authors: Marc Scheid, Christian Kusche, Volkmar Schröder, Uli BarthAbstract:Abstract Several safety characteristics of dusts are determined in the 20-L-sphere (also known as SIWEK Chamber) according to international standards. Dust cloud Ignition is carried out using pyrotechnical igniters. Due to various disadvantages of such igniters the need for alternative Ignition Sources arises again and again. An alternative could be an Ignition Source which is known as “exploding wire” or “fuse wire”. The paper presents test results of a comparative study between both Ignition Sources for the determination of the safety characteristics “Maximum Explosion Pressure” and “Maximum Rate of Explosion Pressure Rise” of five selected dusts in the 20-L-sphere. In addition to that the Ignition mechanisms of both Ignition Sources were analyzed by high speed camera recordings and the Ignition energy was determined with electric and calorimetric recordings. The paper shows results of measurements of the Ignition energy of both Ignition Sources as well as sequences of the flame propagation.
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tests on suitability of the Ignition Source â œexploding wireâ for the determination of explosion characteristics of combustible dusts in the 20 l sphere
Chemical engineering transactions, 2013Co-Authors: Marc Scheid, Christian Kusche, V. Schroeder, U BarthAbstract:Tests on Suitability of the Ignition Source “Exploding Wire” for the Determination of Explosion Characteristics of Combustible Dusts in the 20-L-Sphere Marc Scheid*, Christian Kusche, Volkmar Schroder, Uli Barth a Federal Institute for Materials Research and Testing (BAM), Department 2 “Chemical Safety Engineering”, D-12200 Berlin, Germany b Bergische Universitat Wuppertal, Chair “Methods of Safety Engineering and Incident Research”, D-42119 Wuppertal, Germany marc.scheid@bam.de
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Tests on Suitability of the Ignition Source “exploding Wire” for the Determination of Explosion Characteristics of Combustible Dusts in the 20-l-sphere
Chemical engineering transactions, 2013Co-Authors: Marc Scheid, Christian Kusche, V. Schroeder, Uli BarthAbstract:Tests on Suitability of the Ignition Source “Exploding Wire” for the Determination of Explosion Characteristics of Combustible Dusts in the 20-L-Sphere Marc Scheid*, Christian Kusche, Volkmar Schroder, Uli Barth a Federal Institute for Materials Research and Testing (BAM), Department 2 “Chemical Safety Engineering”, D-12200 Berlin, Germany b Bergische Universitat Wuppertal, Chair “Methods of Safety Engineering and Incident Research”, D-42119 Wuppertal, Germany marc.scheid@bam.de
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Suitability of Ignition Source "exploding wire" for determination of dust explosion characteristics in the 20-L-sphere
Journal of Loss Prevention in the Process Industries, 2013Co-Authors: Marc Scheid, Christian Kusche, Volkmar Schröder, Uli BarthAbstract:Several safety characteristics of dusts are determined in the 20-L-sphere (also known as SIWEK Chamber) according to international standards. Dust cloud Ignition is carried out using pyrotechnical igniters. Due to various disadvantages of such igniters the need for alternative Ignition Sources arises again and again. An alternative could be an Ignition Source which is known as "exploding wire" or "fuse wire". The paper presents test results of a comparative study between both Ignition Sources for the determination of the safety characteristics "Maximum Explosion Pressure" and "Maximum Rate of Explosion Pressure Rise" of five selected dusts in the 20-L-sphere. In addition to that the Ignition mechanisms of both Ignition Sources were analyzed by high speed camera recordings and the Ignition energy was determined with electric and calorimetric recordings. The paper shows results of measurements of the Ignition energy of both Ignition Sources as well as sequences of the flame propagation. © 2013 Elsevier Ltd.
Reinaldo Imbrozio Barbosa - One of the best experts on this subject based on the ideXlab platform.
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amazon soil charcoal pyrogenic carbon stock depends of Ignition Source distance and forest type in roraima brazil
Global Change Biology, 2018Co-Authors: Lidiany Camila Da Silva Carvalho, Philip M Fearnside, Marcelo Trindade Nascimento, Reinaldo Imbrozio BarbosaAbstract:: Pyrogenic carbon (PyC) derived from charcoal particles (paleo + modern) deposited in the soil column has been little studied in the Amazon, and our understanding of the factors that control the spatial and vertical distribution of these materials in the region's forest soils is still unclear. The objective of this study was to test the effect of forest type and distance from the Ignition Source on the PyC stocks contained in macroscopic particles of soil charcoal (≥2 mm; 1 m depth) dispersed in ecotone forests of the northern Brazilian Amazon. Thirty permanent plots were set up near a site that had been occupied by pre-Columbian and by modern populations until the late 1970s. The sampled plots represent seasonal and ombrophilous forests that occur under different hydro-edaphic restrictions. Our results indicate that the largest PyC stock was spatially dependent on distance to the Ignition Source ( 50 cm) in seasonal forests was limited by hydro-edaphic impediments that restricted the occurrence of charcoal. These results suggest that PyC stocks derived from macroscopic charcoal particles in the soil of this Brazilian Amazon ecotone region are controlled by the distance from the Ignition Source of the fire, and that forest types with higher hydro-edaphic restrictions can inhibit formation and accumulation of charcoal. Making use of these distinctions reduces uncertainty and improves our ability to understand the variability of PyC stocks in forests with a history of fire in the Amazon.
Kay M. Villa - One of the best experts on this subject based on the ideXlab platform.
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The influence of Ignition Source on the flaming fire hazard of upholstered furniture
Fire Safety Journal, 1994Co-Authors: Thomas G. Cleary, Thomas J. Ohlemiller, Kay M. VillaAbstract:A set of upholstered chairs constructed from five different fabric/foam combinations was subjected to a variety of Ignition Sources suggested by fire statistics. The Sources included a cigarette, a small match-like flame, an incandescent lamp, a space heater, and a large flame Source (TB 133 Ignition Source). The tests were performed in a furniture calorimeter where heat release rate and species production rates were obtained. For any chair type, the time to the peak heat release rate depended on the Ignition sequence, but the magnitude of the peak did not, within the scatter of the data for any given chair. HAZARD I, the fire hazard assessment method developed at the National Institute of Standards and Technology (NIST), was used to quantify the hazard posed by the different Ignition scenarios. Not one of the Ignition scenarios examined consistently yielded the greatest potential hazard for all chair types tested when Ignition and sustained burning were achieved. No deaths were predicted when a working smoke detector was present. When a detector was not present, the results from the limited number of scenarios considered confirm the importance of a low peak heat release rate and to some extent a slow rate of rise to lessen the hazard of upholstered furniture fires.
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Characterization of the California technical bulletin 133 Ignition Source and a comparable gas burner
Fire Safety Journal, 1992Co-Authors: Thomas J. Ohlemiller, Kay M. VillaAbstract:The California Bulletin (CB) 133 upholstery Ignition Source is based on the use of crumpled newsprint. The present work examined the reproducibility of several aspects of this Source when placed on an inert chair mock-up. The tendency of this Source to heat the side arms of a chair, the area of the seat back subjected to high heat fluxes, the peak flux there and the flux duration all showed substantial variability. For inherently lesser variability a gas burner is preferred. A gas burner, derived from that developed at the British Fire Research Station, was shaped so as to deposit a similar pattern of heat to that of the CB 133 Source. The two Sources were tested for comparability both on chair mock-ups and on full-scale chairs made from a wide variety of materials. The results indicate that the gas burner, as used here, is a somewhat less severe Ignition Source than is the CB 133 igniter.
