scholarly journals Aspects of laboratory tests for the determination of the minimum ignition energy of the fuel / dust mixture

2021 ◽  
Vol 342 ◽  
pp. 04004
Author(s):  
Cătălin Mihai Popa ◽  
Silviu Marin Nan ◽  
Mihaela Părăian ◽  
Adrian Jurca ◽  
Florin Păun
Keyword(s):  
Laboratory Tests ◽  
Electrostatic Discharge ◽  
Explosive Mixture ◽  
Ignition Energy ◽  
Minimum Ignition Energy ◽  
Electrostatic Discharges ◽  
Explosive Force ◽  
And Storage ◽  
Existing Data

During the technological processes of processing, production, handling and storage of combustible dusts, complex explosive mixtures may occur, the characteristics of which, in most cases, cannot be assimilated with the existing data in the specialized literature. If these combustible dusts are mixed with air in appropriate proportions and are initiated by an efficient source of ignition, they can burn rapidly and with considerable explosive force. One of the most common sources of ignition of potentially explosive atmospheres generated by the dust / air mixture is static electricity, materialized by electrostatic discharges. In order to assess the risk of ignition of an explosive mixture of air / dust, it is necessary to know the sensitivity of the explosive atmosphere to ignition, ie the value of the minimum ignition energy of the explosive mixture, which is then compared with the energy resulting from an electrostatic discharge. The paper presents a comparative analysis regarding the methods of determining the minimum ignition energy for air / fuel dust mixtures, using different devices, on the same type of dust.

scholarly journals Sensitivity to ignition by electrostatic discharge of explosive dust / air

2019 ◽  
Vol 290 ◽  
pp. 12011 ◽  
Author(s):  
Dan Gabor ◽  
Emilian Ghicioi ◽  
Mihaela Părăian ◽  
Niculina Vătavu ◽  
Florin Adrian Păun ◽  
...  
Keyword(s):  
Electrostatic Discharge ◽  
Electrostatic Charge ◽  
Explosion Hazard ◽  
Explosive Mixture ◽  
Ignition Energy ◽  
Minimum Ignition Energy ◽  
Electrostatic Discharges ◽  
Industrial Sectors ◽  
Surrounding Atmosphere

In industrial sectors that use, process, transport or store, substances such as combustible dusts could exist some workplaces with explosion hazard due to the possibility of dust/air explosive formation and ignition, both inside the installations and in the surrounding atmosphere. Methods and means of protection aim to prevent the development of explosive atmospheres, followed by preventing the occurrence of ignition sources and then limiting the effects of explosions. To assess the risk of ignition of the explosive atmosphere, there must be known first of all, the explosive atmosphere’s sensitivity to ignition by electrostatic discharge, respectively, the minimum ignition energy of the explosive mixture, afterwards being required an analysis on the possibilities of formation and discharge of electrostatic charge. For the most common combustible dusts, the minimum ignition energy is given, but for new types of flammable substances this parameter defining the sensitivity to ignition of the mixture by electrostatic discharges must be determined. The paper presents the results of research carried out in order to develop the methods and standards for determining the minimum ignition energy of the combustible dust / air mixture and of the methods for the assessment of the risk of ignition of the dust/air explosive atmosphere by electrostatic discharge.

scholarly journals Determination Of The Minimum Ignition Energy On Different Devices

2015 ◽  
Vol 10 (1) ◽  
pp. 8-14
Author(s):  
Petr Lepik ◽  
Dieter Gabel ◽  
Wojciech Adamus ◽  
Ladislav Mokos ◽  
Miroslav Mynarz ◽  
...  
Keyword(s):  
Experimental Measurement ◽  
Coal Dust ◽  
Test Equipment ◽  
Organic Dust ◽  
Ignition Energy ◽  
Minimum Ignition Energy ◽  
Comparison Of The Results

Abstract This article focuses on determination of the minimum ignition energy of dust. For the measurement of the minimum ignition energy of dust are available device from different manufacturers. In this article, the comparison device from three manufacturers - Chilworth, Kühner and Anko are executed. For the experimental measurement of the minimum minimum ignition energy was chosen 5 dust samples so that they are represented sample of organic dust, synthetic organic dust and coal dust. The article briefly introduces each apparatus for determining the minimum ignition energy and there is a comparison of the results obtained with individual devices. Finally, it is an assessment the results obtained and used test equipment.

Determination of the minimum ignition energy on the basis of a statistical approach

2013 ◽  
Vol 26 (6) ◽  
pp. 1655-1660 ◽  
Author(s):  
Angelika Wähner ◽  
Gisbert Gramse ◽  
Tim Langer ◽  
Michael Beyer
Keyword(s):  
Statistical Approach ◽  
Ignition Energy ◽  
Minimum Ignition Energy

Practical Realization of a Reference System for Earth Dynamics by Satellite Methods

1975 ◽  
Vol 26 ◽  
pp. 341-380 ◽  
Author(s):  
R. J. Anderle ◽  
M. C. Tanenbaum
Keyword(s):  
Reference Frame ◽  
Polar Motion ◽  
Pole Position ◽  
Control Points ◽  
Significant Information ◽  
Crustal Motion ◽  
Average Reference ◽  
Future Data ◽  
Existing Data

AbstractObservations of artificial earth satellites provide a means of establishing an.origin, orientation, scale and control points for a coordinate system. Neither existing data nor future data are likely to provide significant information on the .001 angle between the axis of angular momentum and axis of rotation. Existing data have provided data to about .01 accuracy on the pole position and to possibly a meter on the origin of the system and for control points. The longitude origin is essentially arbitrary. While these accuracies permit acquisition of useful data on tides and polar motion through dynamio analyses, they are inadequate for determination of crustal motion or significant improvement in polar motion. The limitations arise from gravity, drag and radiation forces on the satellites as well as from instrument errors. Improvements in laser equipment and the launch of the dense LAGEOS satellite in an orbit high enough to suppress significant gravity and drag errors will permit determination of crustal motion and more accurate, higher frequency, polar motion. However, the reference frame for the results is likely to be an average reference frame defined by the observing stations, resulting in significant corrections to be determined for effects of changes in station configuration and data losses.

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