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Title: NEW ASPECTS OF EXPLOSION CHARACTERISTICS OF SELECTED HYBRID MIXTURES
NEW ASPECTS OF EXPLOSION CHARACTERISTICS OF SELECTED HYBRID MIXTURES

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Iris Helegda; Matous Helegda; Jan Skrinsky; Katerina Kubricka; Marek Podkul
10.5593/sgem2023/4.1/s17.13
10.5593/sgem2023/4.1
1314-2704
978-619-7603-59-0
English
23
4.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Renewable Energy Sources and Clean Technologies
A small amount of flammable gas mixed with dust can cause a large explosion with serious consequences. In this study, explosion tests of hybrid mixtures were performed in an explosion chamber with a volume of 0.02 m3. Spitzer et al. (2023) presented the first ever test of hybrid mixtures with methane as the gas component and a specific cornstarch as the dust sample, investigating the practicality of the whole procedure, the dispersion of the results and the variation between the test apparatuses. The research mentioned above, was focused on the ignition source, the accuracy of the pressures, and the mixing procedure. All this was tested on a hybrid mixture under normal atmospheric conditions.
In this study, we demonstrate the effect of a higher initial initiation temperature of the hybrid mixture. The experiments were carried out in a 0.02 m3 explosion chamber. The laboratory-sized vessels used in the present study are geometrically similar to the study mentioned above. Dynamic explosion pressures were recorded by a pair of piezoelectric pressure sensors (Kistler, model 701A) and a sensor charge amplifier (Kistler, model 5041E1) combined with programmable logic controllers.
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[5] OZM Research, s.r.o. Explosion chamber CA 20-L for measuring explosion parameters of dust dispersions, gases and vapors at standard and elevated temperatures - User's manual for installation, operation, maintenance and troubleshooting. Ver. 2 (January 21, 2016), Available on request from: http://www.ozm.cz/en/
[6] HELEGDA M., SKRINSKY J., JASTRZEMBSKI T., VERES J., CESPIVA J., OCHODEK T., The role of burning velocity in the validity of hybrid mixtures, Chemical Engineering Transactions, Volume 90, pp 97-102, 2022.
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[8] AMYOTTE P. R., An Introduction to Dust Explosions: Understanding the Myths and Realities of Dust Explosions for a Safer Workplace. The Boulevard, Langford Lane, Kidlington, Oxford, OX5 1GB, UK 225 Wyman Street, Waltham, MA 02451, USA: Butterworth-Heinemann, ISBN 978-0-12-397007-7, 2013.
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[10] EN 14034-1+A1. Determination of explosion characteristics of dust clouds – Part 1: Determination of the maximum explosion pressure pmax of dust clouds. European Committee for Standardization, 2011, 24 pp. Classification code 38 9604.
[11] EN 14034-2+A1. Determination of explosion characteristics of dust clouds – Part 2: Determination of the maximum rate of explosion pressure rise (dp/dt)max of dust clouds. European Committee for Standardization, 2011, 28 pp. Sorting code 38 9604.
[12] EN 15967. Determination of the maximum explosion pressure and the maximum rate of pressure rise of gases and vapours. European Committee for Standardization, 2022, 36 pp. Sorting code 38 9662.
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This work was supported by the Student’s Grant Competition, VSB – Technical University of Ostrava, reg. no. SP2023/014, under the project “Verification of the effectiveness of overpressure ventilation of protected escape routes by the selected fire model”.
conference
https://doi.org/10.5593/sgem2023/4.1/s17.13
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Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 03 - 09 July, 2023
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
101-108
03 - 09 July, 2023
website
9182
hybrid mixture; 20 L-sphere; high temperature; explosion pressure, pressure rise