Development of the automation tool for the design of fire alarm lines with optimized composition

 

Oleksiy Antoshkin

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0003-2481-2030

 

Oleh Neshpor

Institute of Public Administration and Research in Civil Protection

http://orcid.org/0000-0002-0670-5445

 

DOI: https://doi.org/10.52363/2524-0226-2023-37-15

 

Keywords: mathematical modeling, optimization, coverage, placement of fire detectors, plume tracing

 

Аnnotation

 

The work solves an important scientific and practical optimization task of building means for automating the design of fire alarm loops, optimized in terms of the number of detectors and the length of wires for rooms of arbitrary shape, taking into account regulatory and technological limitations. A complex of programs for solving the optimization problem has been developed and implemented. A mathematical model of the problem, a generalized strategy for solving the problem, means of mathematical modeling of connections between circles, which model the control zones of fire detectors forming a circular coverage of the area, as functions that do not require the introduction of auxiliary variables, have been developed. Earlier works on a similar topic did not provide an opportunity to automatically obtain the optimal composition of fire alarm loops, taking into account the requirements of a regulatory and physical nature. The computational experiments carried out in the work convincingly confirmed the constructiveness of the developed means of mathematical modeling of the connections of geometric objects in the problems of circular coverage and demonstrated the adequacy of the constructed mathematical model of the problem of covering with circles of the same radius an area of complex shape and its implementations, the effectiveness algorithms for generating the solution space and methods for finding a local extremum. It should be noted that most of the results obtained during computational experiments were obtained for the first time. The practical value of the proposed approach for problems of circular coverage of arbitrary areas, which consists in the generation of the solution space of the problem for an acceptable starting point with subsequent local optimization, is clearly demonstrated during the solution of test problems. The developed software complex can be used in the design of fire alarm systems by design engineers and during the examination of projects.

 

References

 

  1. Bennell, J., Scheithauer, G., Stoyan, Yu. (2015). Optimal clustering of a pair of irregular objects. Journal of Global Optimization, 61(3), 497–524. doi: 10.1007/s10898-014-0192-0 
  2. Birgin, E. G., Bustamante, L. H., Callisaya H. F. (2013). Packing circles within ellipses. International transactions in operational research, 20(3), 365–389. doi: 10.1111/itor.12006 
  3. Komyak, V. M., Sobol, O. M., Sobyna, V. O., Lisnyak, A. A. (2013). Optimization of coverage of given areas with geometric objects with variable metric characteristics: Monograph. Kharkiv: NUCDU, 124. Available at: http://repositsc.nuczu.ua/handle/123456789/5244
  4. Yakovlev, S., Kartashov, O., Podzeha, D. (2022). Mathematical Models and Nonlinear Optimization in Continuous Maximum Coverage Location Problem. MDPI Computation, 10(7), 119–134. doi: 10.3390/computation10070119
  5. Saipullaa, A., Westphalb, C., Liua, B., Wang J. (2013). Barrier coverage with line-based deployed mobile sensors. Ad Hoc Networks, 11, 4, 1381–1391. doi: 10.1016/j.adhoc.2010.10.002 
  6. Stoyan, Y., Pankratov, A., Romanova, T. (2016). Quasi-phi-functions and optimal packing of ellipses. Journal of Global Optimization, 65(2), 283–307. doi: 10.1007/s10898-015-0331-2 
  7. Komyak, V., Pankratov, A., Patsuk, V., Prikhodko A. (2016). The problem of covering the fields by the circles in the task of optimization of observation points for ground video monitoring systems of forest fires. ECONTECHMOD: An International Quarterly Journal on Economics of Technology and Modelling Processes, 5, 2, 133–138. Available at:http://repositsc.nuczu.edu.ua/handle/123456789/691
  8. Yakovlev, S., Kartashov, O., Mumrienko, A. (2022). Formalization and solution of the maximum area coverage problem using library. Radioelectronic and computer systems, 3, 104–120. doi: 10.32620/reks.2022.2.03
  9. Adesina, E., Odumosu, J., Morenikeji, O., Umoru, E., Ayokanmbi, O., Ogunbode, B. (2017). Optimization of Fire Stations Services in Minna Metropolis using Maximum Covering Location Model (MCLM). Journal of Applied Sciences & Environmental Sustainability, 3(7), 172–187. Available at: https://www.jases.org/current-issue/vol-3-issue-7-2017/optimization-of-fire-stations-services-in-minna-metropolis-using-maximum-covering-location-model-mclm/
  10. Yueshi, W., Cardei, M. (2018). Distributed algorithms for barrier coverage via sensor rotation in wireless sensor networks. Journal of Combinatorial Optimization, 36, 230–251. doi: 10.1007/s10878-016-0055-3

 

Selection of precursors of safe silica-based fireproof coatings for textile materials

 

Olga Skorodumova

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0002-8962-0155

 

Olena Chebotareva

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0002-7321-8700

 

Andrey Sharshanov

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0002-9115-3453

 

Andrey Chernukha

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0002-0365-3205

 

DOI: https://doi.org/10.52363/2524-0226-2023-37-14

 

Keywords: liquid glass, siliceous coatings, fire protection of textile materials, precursors of inorganic and organic origin

 

Аnnotation

 

The selection of the inorganic precursor SiO2 as the main component of the simplified safe technology for obtaining flame-retardant coatings on textile materials was carried out. By thermo-graphic research of organic and inorganic SiO2 precursors, performed on an OD-102 deri-vatograph under conditions of heating at a rate of 10ºС/min in an air environment, the processes of decomposition of the coating that occur during the action of fire were investigated. Gels based on inorganic precursors produced by industry (silica sol, silica gel) and silicic acid, which was obtained by the exchange reaction of an aqueous solution of sodium silicate of liquid glass and acetic acid, were studied for the comparative characteristics of thermal destruction of coatings. As organic precursors of SiO2, gels of ethyl silicate-32 and methyltriethoxysilane were studied, which were obtained by hydrolysis of organosilicon compounds in an acidic water-alcohol medi-um with subsequent polycondensation of the hydrolysis products. The effect of temperature on the nature of thermal destruction of silica gel, silica sol, silicic acid and organosilicon gels of ethyl silicate and methylotriethoxysilane was investigated. It is shown that inorganic precursors differ favorably from organosilicon precursors in terms of the overall thermal effect during their de-composition, mass loss during heat treatment, and the rate of change of this parameter. Consider-ing that, in addition to total mass loss, the increase in mass loss during heating is less than 1 % in compositions based on inorganic precursors, it is possible to use all three types of inorganic pre-cursors, but from the point of view of acidity and safety of impregnation compositions, prefer-ence is given to silicic acid obtained by the exchange reaction of silicate sodium liquid glass with acetic acid.

 

References

  1. Carosio, F., Alongi, J. (2016). Influence of layer by layer coatings containing octapropylammonium polyhedral oligomericsilsesquioxane and ammonium poly-phosphate on the thermal stability and flammability of acrylic fabrics. Journal of Ana-lytical and Applied Pyrolysis, 119, 114–123. doi: 10.1016/j.jaap.2016.03.010
  2. Zelinski, B. J., Uhlmann, D. R. (1984). Gel technology in ceramics. Journal Physics and Chemistry Solids, 45(10), 1069–1090. doi: 10.1016/0022-3697(84)90049-0
  3. Alongi, J., Carosio, F., Malucelli, G. (2014). Current emerging techniques to impart flame retardancy to fabrics: An overview. Polymer Degradation and Stability, 106, 138–149. doi: 10.1016/ j.polymdegradstab.2013.07.012
  4. Panda, A., Varshney, P., Mohapatra, S., Kumar, A. (2018). Development of liq-uid repellent coating on cotton fabric by simple binary silanization with excellent self-cleaning and oil-water separation properties. Carbohydrate Polymers, 181, 1052–1060. doi: 10.1016/ j.carbpol.2017.11.044
  5. Skorodumova, O., Tarakhno, O., Chebotaryova, O., Bezuglov, O., Emen, F. (2021). The use of sol-gel method for obtaining fire-resistant elastic coatings on cot-ton fabrics. Materials Science Forum, 1038, 468–479. doi: 10.4028/www.scientific.net/MSF.1038.468
  6. Alongi, J., Ciobanu, M., Malucelli, G. (2011). Cotton fabrics treated with hy-brid organic–inorganic coatings obtained through dual–cure processes. Cellulose, 18, 1335–1348. doi: 10.1007/s10570-011-9564-5
  7. Alongi, J., Ciobanu, M., Malucelli, G. (2012). Sol–gel treatments on cotton fab-rics for improving thermal and flame stability: Effect of the structure of the alkoxysilane precursor. Carbohydrate Polymers, 87(1), 627–635. doi: 10.1016/j.carbpol.2011.08.036
  8. Raabe, J., de Souza Fonseca, A., Bufalino, L. (2014). Evaluation of reaction factors for deposition of silica (SiO2) nanoparticles on cellulose fibers. Carbohydrate Polymers, 114, 424–431. doi: 10.1016/ j.carbpol.2014.08.042
  9. Alongi, J., Ciobanu, M., Malucelli, G. (2012). Thermal stability, flame retard-ancy and mechanical properties of cotton fabrics treated with inorganic coatings syn-thesized through sol–gel processes. Carbohydrate Polymers, 87(3), 2093–2099. doi: 10.1016/j.carbpol.2011.10.032
  10. Alongi, J., Colleoni, C., Rosace, G., Malucelli, G. (2014). Sol–gel derived ar-chitectures for enhancing cotton flame retardancy: Effect of pure and phosphorus-doped silica phases. Polymer Degradation and Stability, 99, 92–98. doi: 10.1016/j.polymdegradstab.2013.11.020
  11. Skorodumova, O. B., Semchenko, G. D., Goncharenko, Y. N., Tolstoi, V. S., (2001). Crystallization of SiO2 from ethylsilicate-based gels. Glass and Ceramics, 58(1–2), 31–33. doi: 10.1023/A:1010933028152
  12. Gou, J., Zhuge, J. (2013). Nanotechnology Safety in the Marine Industry. In R. Asmatulu (Ed). Nanotechnology Safety, 161–174. doi: 10.1016/B978-0-444-59438-9.00012-6
  13. Doroudiani, S., Doroudiani, B., Doroudiani, Z. (2012). Materials that release toxic fumes during fire. Toxicity of Building Materials. Woodhead Publishing Series in Civil and Structural Engineering, 241–282. doi: 10.1533/9780857096357.241
  14. Covaci, A. (2003). Determination of brominated flame retardants, with em-phasis on polybrominated diphenyl ethers (PBDEs) in environmental and human sam-ples – a review. Environment International, 29(6), 735–756. doi: 10.1016/S0160-4120(03)00114-4
  15. Ilyas, M., Sudaryanto, I. A., Setiawan, E., Riyadi, A. S., Isobe, T., Tanabe, S. (2013). Characterization of polychlorinated biphenyls and brominated flame retard-ants in sludge, sediment and fish from municipal dumpsite at Surabaya, Indonesia. Chemosphere, 93(8), 1500–1510. doi: doi.org/10.1016/ j.chemosphere.2013.07.048
  16. Egebäck, A–L., Sellström, U., McLachlan, M. S. (2012). Decabromodiphenyl ethane and decabromodiphenyl ether in Swedish background air. Chemosphere, 86(3), 264–269. doi: 10.1016/j.chemosphere. 2011.09.041
  17. Remberger, M., Sternbeck, J., Palm, A., Kaj, L., Strömberg, K., Brorström-Lundén, E. (2004). The environmental occurrence of hexabromocyclododecane in Sweden. Chemosphere, 54(1), 9–21. doi: 10.1016/S0045-6535(03)00758-6
  18. 18. Karlsson, M., Julander, A., van Bavel, B., Hardell, L. (2007). Levels of bro-minated flame retardants in blood in relation to levels in household air and dust. Envi-ronment International, 33(1), 62–69. doi: 10.1016/ j.envint.2006.06.025

 

Calculation method of assessing the condition of steel structures of buildings in the event of fire

 

Dmytro Dubinin

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0001-8948-5240

 

Andrei Lisniak

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0001-5526-1513

 

Serhii Shevchenko

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0002-6740-9252

 

Ihor Gritsina

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0002-2581-1614

 

Yuri Gaponenko

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0003-0854-5710

 

DOI: https://doi.org/10.52363/2524-0226-2023-37-12

 

Keywords: fire, rate of temperature change, steel structures, fire curves, fire retardant

 

Аnnotation

 

The object of the study is the process of assessing the condition of steel structures of buildings in the event of a fire. The use of standard fire curves, such as ISO 834, ASTM E119, which determine the temperature dependence over time, is substantiated and analyzed. Based on this, a calculation method for determining the rate of temperature change for protected and unprotected steel structures using fire curves is proposed. To protect steel structures from high temperature, such fire-resistant means as heat-insulating plates, plasterboard sheets and cement-sand plaster with appropriate tactical and technical characteristics were used. Based on the results of the study, it was established that the most effective fire protection means for steel structures are heat-insulating plates, and the least effective is cement-sand plaster. This is determined due to the difference in temperature, so according to ISO 834 for a heat-insulating board at 5 hours of exposure, the temperature is 896,2 ºС, and for plasterboard – 474,8 ºС, cement-sand plaster – 316,25 ºС. Thus, according to ASTM E119, for a heat-insulating board for 5 hours of exposure, the temperature is 869,85 ºС, and for plasterboard – 463,34 ºС, cement-sand plaster – 310,70 ºС. From the results of the research, it can be noted that the standard fire curves of ISO 834  and ASTM E119 make it possible to conduct research and determine the rate of temperature change, while it should be noted that they do not significantly differ from each other. Graphical dependences are also obtained for steel structures taking into account fire protection measures and standard fire curves ISO 834 and ASTM E119. The obtained results of the study make it possible to increase the level of fire safety of buildings and structures at the stages of design and operation, as well as to determine the limit (critical) state of steel structures in time during fire extinguishing operations.

 

References

 

  1. Dubinin, D., Lisniak, А., Shevchenko, S., Krivoruchko, I., Gaponenko, Yu. (2021). Eksperymental'ne doslidzhennja rozvytku pozhezhi v budivli. Problemy nadzvychajnyh sytuacij, 34, 110–121. doi: 10.52363/2524-0226-2021-34-8
  2. Dubіnіn, D. P., Lіsnjak, A. A., Shevchenko, S. M., Krivoruchko, Є. M., Gaponenko, Ju. І. (2022). Doslіdzhennja vplivu budіvel'nogo materіalu konstrukcії budіvlі na rozvitok vnutrіshn'oї pozhezhі. Problemy nadzvychajnyh sytuacij, 34, 175–185. doi: 10.52363/2524-0226-2022-35-13
  3. Nakaz MVS № 1064. (2018). Pro zatverdzhennja Pravyl z vognezahystu. Available at: https://zakon.rada.gov.ua/laws/show/z0259-19#Text
  4. Dubinin, D. (2021). Doslidzhennja vymog do perspektyvnyh zasobiv pozhezhogasinnja tonkorozpylenoju vodoju. Problemy nadzvychajnyh sytuacij, 33, 15–29. doi: 10.52363/2524-0226-2021-33-2
  5. Yilmaz, D. G. (2022). Fire Safety of Tall Buildings: Approach in Design and Prevention. 5th International Conference of Contemporary Affairs in Architecture and Urbanism (ICCAUA-2022), 206–216. doi: 10.38027/ICCAUA2022EN0215
  6. Sadkovyi, V., Andronov, V., Semkiv, O. et al. (2021). Fire resistance of reinforced concrete and steel structures. Kharkiv: РС ТЕСHNOLOGY СЕNTЕR, 180. doi: 15587/978-617-7319-43-5
  7. Bicer, A., Kar, F. (2017). Thermal and mechanical properties of gypsum plaster mixed with expanded polystyrene and tragacanth. Thermal Science and Engineering Progress, 1, 59–65. doi: 10.1016/j.tsep.2017.02.008
  8. Wang, H., Nie, S., Li, J. (2022). Reduction model of hot- and cold-rolled high-strength steels during and after fire. Fire Safety Journal, 129, 103563. doi: 10.1016/j.firesaf.2022.103563
  9. Zhang, C., Grosshandler, W., Sauca, A. et al. (2020). Design of an ASTM E119 Fire Environment in a Large Compartment. Fire Technol. Fire Technology, 56, 1155–1177. doi: 10.1007/s10694-019-00924-7
  10. Chen, M.-T., Pandey, M., Young, B. (2021). Mechanical Properties of Cold-formed Steel Semi-oval Hollow Sections after exposure to ISO-834 fire. Thin-Walled Structures, 167, 108202. doi: 10.1016/j.tws.2021.108202
  11. Mirgorod, O. V., Pushkarenko, A. S., Vasil'chenko, O. V. (2011). Vognezahisne obrobljannja budіvel'nih materіalіv і konstrukcіj. NUCZU.
  12. BS EN 1991-1-2:2002. (2002). Eurocode 1. Actions on structures General actions. Actions on structures exposed to fire.
  13. ISO 834-11:2014. (2014). Fire resistance tests – Elements of building construction – Part 11: Specific requirements for the assessment of fire protection to structural steel elements.
  14. Dzidic, S. (2018). Fire Resistance of RC Slabs according to ACI/TMS 216.1 and EC 2 – Possibility for Comparison. Zbornik radova Građevinskog fakulteta, 34, 43–53. doi: 10.14415/konferencijaGFS2018.003
  15. ASTM E119. (2018). Standard Test Methods for Fire Tests of Building Construction and Materials.
  16. Buchanan, A. H., Abu, A. K. (2017). Structural Design for Fire Safety. University of Canterbury, 2, 440.

 

Idetification of hazard sources at nuclear reaction with consideration of fuel element corrosion

 

Yuliana Hapon

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0002-3304-5657

 

Maksym Kustov

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0002-6960-6399

 

Roman Ponomarenko

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0002-6300-3108

 

Yevhen Slepuzhnikov

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0002-5449-3512

 

Maryna Chyrkina

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0002-2060-9142

 

DOI: https://doi.org/10.52363/2524-0226-2023-37-13

 

Keywords: nuclear power plant, galvanic cell, electrode potential, corrosion, reactor, alloy

 

Аnnotation

 

The paper analyzes the sources of potential danger, arising at nuclear power plants as a result of the formation and accumulation of a significant amount of hazardous radioactive products during the process of release and the presence of a principal possibility of release in the event of an accident beyond the limit. The risks of radiation impact on the personnel, population and the environment as a whole are determined. It is established that one of the main factors that negatively affects and significantly limits the lifetime of a nuclear reactor is the corrosion wear of structural materials of the reactor core and fuel cladding, which is caused by the constant circulation of water coolant. A characteristic feature of water-water power reactors has been determined, which consists in continuous and local (nodular) corrosion destruction by the electrochemical mechanism of the surface of the fuel element cladding, which is made of zirconium alloy and steel parts of various grades of other structural parts. The paper shows a short-circuited galvanic element formed on the inner wall of fuel elements made of Zr + 1 % Nb alloy and pellets made of uranium oxide (UxOy), as well as the outer galvanic element of fuel elements and structural materials of the reactor made of steel of different grades. The hazards caused by corrosion destruction and release of hazardous radioactive substances from the reactor core are analyzed. Studies were conducted on the change in the thickness of oxide films depending on the operating time in solutions of different composition and acidity of the environment. The kinetics of galvanic processes accompanying internal and external corrosion was investigated, which plays an important role in improving the ways and methods aimed at preventing and preventing emergencies at nuclear power plants.

 

References

 

  1. Zhiming, Wu,  Qi, Yang,  Rong, Zhou. (2001). Manufacture of nuclear fuel elements for commercial PWR in China. Rare Metal Materials and Engineering, 30, 9–12. Available at: https://inis.iaea.org/search/36024618
  2. National Research Council. (2014). Lessons Learned from the Fukushima Nuclear Accident for Improving Safety of U.S. Nuclear Plants. Washington, DC: The National Academies Press. doi: 17226/18294
  3. Vambol, S., Vambol, V., Kondratenko, O., Suchikova, Y., Hurenko, O. (2017). Assessment of improvement of ecological safety of power plants by arranging the system of pollutant neutralization. Eastern-European Journal of Enterprise Technologies, 3, 63–73. doi: 10.15587/1729-4061.2017.102314
  4. Shuhailo, O. P., Hrebeniuk, Yu. P., Zelenyi, O. V., Ryzhov, D. I. (2020). Otrymanyi dosvid ta vyvcheni uroky shchodo diialnosti z perekhodu enerhoblokiv AES Ukrainy do dovhostrokovoi ekspluatatsii. Yaderna ta radiatsiina bezpeka, 1(85), 15–28. doi: 32918/nrs.2020.1(85).02
  5. Zhou, L., Dai, J., Li, Y., Dai, X., Xie, C. (2022). Research Progress of Steels for Nuclear Reactor Pressure Vessels. Materials,15, 8761. doi: 3390/ma15248761
  6. Mukhachov, A. P., Nefedov, V. G., Kharytonova, O. А. (2019). Electrode processes in electrolysis of zirconium at production of plastic zirconium for nuclear energy. Questions of atomic science and technology, 2, 111– doi: 10.46813/2019-120-111
  7. Zirui, Chen, Yongfu, Zhao, Min, Tang, Zhaohui, Yin. (2022). Influence of Ammonia on the Corrosion Behavior of a Zr–Sn–Nb Alloy in High Temperature Water. Frontiers in Materials, 9,1– doi: 10.3389/fmats.2022.910186
  8. Lai, Ping, Lu, Junqiang, Zhang,mHao, Liu, Qingdong. (2020). The corrosion behavior of M5 (Zr–1Nb-0.12O) alloy in 360 °C water with dissolved oxygen. Journal of Nuclear Materials, 532, 152079. doi: 1016/j.jnucmat.2020.152079
  9. Kuprin, A. S., Belous, V. A., Voyevodin, V. N. (2014). High-temperature air oxidation of E110 and Zr-1Nb alloys claddings with coatings. Problems of atomic science and technology, 1(89), 126– Available at: https://www.researchgate.net/publication/260134041
  10. Akhiani, H., Szpunar, JA. (2013). Effect of surface roughness on the texture and oxidation behavior of Zircaloy-4 cladding tube. Applied Surface Science, 285, 832– doi: 10.1016/j.apsusc.2013.08.137
  11. Belash,N., Petelhuzov, Y. A., Ozhyhov, L. S., Savchenko, V. Y., Kush-tym, A. V. (2011). Vlyianye vysokotemperaturnoho nahreva v vodianom pare na svoistva obolochek. Voprosy atomnoi nauky y tekhniky, 2, 88–94. Available at: http://dspace.nbuv.gov.ua/handle/123456789/111291
  12. Bobro, D. (2019). International experience of development and implementation of energy innovative technologirs in nuclear and related fields. Strategic Priorities, 51, 3–4, 31– Available at: https://niss-priority.com/index.php/journal/article/view/261
  13. Hapon, Yu. K., Kaluhin, V. D., Kustov, M. V. (2020). Mekhanizm vnutrishnoi korozii splavu tsyrkoniiu Zr1Nb V TVELakh. Promising Materials and Processes in Applied Electrochemistry : monograph, editor-in-chief V.Z. Barsukov, Kyiv, 288. Available at: http://repositsc.nuczu.edu.ua/handle/123456789/13477
  14. Renčiuková, V., Macák, J., Sajdl, P., Novotný, R., Krausová, A. (2018). Corrosion of zirconium alloys demonstrated by using impedance spectroscopy. Journal of Nuclear Materials, 510, 312– doi: 10.1016/j.jnucmat.2018.08.005
  15. Hapon, Y., Kustov, M., Kalugin, V., Savchenko, O. (2021). Studying the Effect of Fuel Elements Structural Materials Corrosion on their Operating Life. Materials Science Forum, 1038, 108– doi: 10.4028/www.scientific.net/MSF.1038.108
  16. Barberis, P., Skocic, M., Kaczorowski, D. (2019). Shadow corrosion: Experiments and modeling. Journal of Nuclear Materials, 523, 310–319. doi: 1016/j.jnucmat.2019.06.001
  17. Hapon, Yu., Kustov, M., Chyrkina, M., Romanova O. (2022). Multistage Corrosion of Fuel Element Materials in Nuclear Reactors. Solid State Phenomena, 334, 63–69. doi: 4028/p-0s9zyu
  18. Baek, Jong, Park, Ki, Jeong, Yong. (2004). Oxidation kinetics of Zircaloy-4 and Zr-1Nb-1Sn-0.1Fe at temperatures of 700-1200 °C. Journal of Nuclear Materials, 335, 443–456. doi: 10.1016/j.jnucmat.2004.08.007

 

A model of cooling the tank shell by water in the case of a fire in an adjacent tank

 

Maksym Maksymenko

National University of Civil Defenсe of Ukraine

http://orcid.org/0000-0002-1888-4815

 

DOI: https://doi.org/10.52363/2524-0226-2023-37-11

 

Keywords: tank fire, thermal influence of fire, heat transfer, water cooling

 

Аnnotation

 

Cooling the tank shell by water in the case of a fire in an adjacent tank is considered. A model of the cooling effect of the water film flowing down on the tank shell was constructed. The model is based on the heat balance equation for the tank shell and the heat balance equation for the water film. The model takes into account the radiant heat exchange of the shell and fire, environment and internal space of the tank; convection heat exchange of the shell with water and steam-air mixture in the gas space of the tank. In addition, the heat balance equation for the water film includes radiant heat transfer to the environment and convective heat transfer to the ambient air. The main assumption of the model is constant water flow rate and a constant thickness of the water film on the wall. The finite difference method was used to solve the heat balance equations of the shell and the water film. The values of convection heat transfer coefficients were found by using methods of similarity theory. The coefficient of convection heat transfer between the wall and water film has a linear dependence on the water temperature and a power dependence on the intensity of water supply. It was determined that coefficient of convection heat transfer between the tank wall and the water film is 3 orders of magnitude higher than the coefficient of convection heat transfer between the shell and ambient air. It is shown that the temperature distribution in the tank shell and the water film converges to the stationary distribution. The combination of heat balance equations for the shell and water film allows building an algorithm for detrmining the temperatures on the tank shell and water film. The algorithm is based on the sequential calculation of the steady-state value of the shell temperature and the growth the temperature of the water film at points located along the vertical line on the tank shell. The algorithm starts working from the point on the upper edge of the tank shell and ends at the point at the level of the oil product. The obtained results can be used for determining the intensity of water supply for cooling the tank shell in the case of fire in an adjacent tank.

 

References

 

  1. Ni, Z., Wang, Y. (2016). Relative risk model for assessing domino effect in chemical process industry. Safety Science, 87, 156–166. doi: 10.1016/j.ssci.2016.03.026
  2. Otrosh, Yu., Semkiv, O., Rybka, E., Kovalov, A. (2019). About need of calculations for the steel framework building in temperature influences conditions. IOP Conference Series: Materials Science and Engineering, 708(1). doi: 10.1088/1757-899X/708/1/012065
  3. Yang, R., Wang, Z., Jiang, J., Shen, S, Sun, P., Lu, Y. (2020). Cause analysis and prevention measures of fire and explosion caused by sulfur corrosion. Engineering Failure Analysis, 108, 104342. doi: 10.1016/j.engfailanal.2019.104342
  4. Kustov, M. V., Kalugin, V. D., Tutunik, V. V., Tarakhno, E. V. (2019). Physicochemical principles of the technology of modified pyrotechnic compositions to reduce the chemical pollution of the atmosphere. Chemistry and Chemical Technology Issues, 1, 92–99. doi: 10.32434/0321-4095-2019-122-1-92-99
  5. Mygalenko, K., Nuyanzin, V., Zemlianskyi, A., Dominik, A., Pozdieiev, S. (2018). Development of the technique for restricting the propagation of fire in natural peat ecosystems. Eastern-European Journal of Enterprise Technologies, 1 (10), 31–37. doi: 10.15587/1729-4061.2018.121727
  6. Popov, O., Iatsyshyn, A., Kovach, V., Artemchuk, V., Kameneva, I., Taraduda, D., Sobyna, V., Sokolov, D., Dement, M., Yatsyshyn, T. (2020). Risk assessment for the population of Kyiv, Ukraine as a result of atmospheric air pollution. Journal of Health and Population, 10(25). doi: 10.5696/2156-9614-10.25.200303
  7. Mukunda, H. S., Shivakumar, A., Bhaskar Dixit, C. S. (2021). Modelling of unsteady pool fires – fuel depth and pan wall effects. Combustion Theory and Modelling. doi: 10.1080/13647830.2021.1980229
  8. Elhelw, M., El-Shobaky, A., Attia, A, El-Maghlany, W. M. (2021). Advanced dynamic modeling study of fire and smoke of crude oil storage tanks. Process Safety and Environmental Protection, 146, 670–685. doi: 10.1016/j.psep.2020.12.002
  9. Semerak, M., Pozdeev, S., Yakovchuk, R., Nekora, O., Sviatkevich, O. (2018). Mathematical modeling of thermal fire effect on tanks with oil products. MATEC Web of Conferences, 247(00040). doi: 10.1051/matecconf/201824700040
  10. Espinosa S. N., Jaca R. C., Godoy L. A. (2019). Thermal effects of fire on a nearby fuel storage tank. Journal of Loss Prevention in the Process Industries, 62(103990). doi: 1016/j.jlp.2019.103990
  11. Li, Y., Jiang, J., Zhang, Q., Yu, Y., Wang, Z., Liu, H., Shu, C.-M. (2019). Static and dynamic flame model effects on thermal buckling: Fixed-roof tanks adjacent to an ethanol pool-fire. Process Safety and Environmental Protection, 127, 23–35. doi: 10.1016/j.psep.2019.05.001
  12. Ahmadi, O., Mortazavi, S. B., Pasdarshahri, H., Mohabadi, H. A. (2019). Consequence analysis of large-scale pool fire in oil storage terminal based on computational fluid dynamic (CFD). Process Safety and Environmental Protection, 123, 379–389. doi: 10.1016/j.psep.2019.01.006
  13. Abramov, Y. A., Basmanov, O. E., Mikhayluk, A. A., Salamov, J. (2018). Model of thermal effect of fire within a dike on the oil tank. Naukovyi Visnyk NHU, 2, 95–100. doi: 10.29202/nvngu/2018-2/12
  14. Basmanov,, Maksymenko, M. (2022). Modeling the thermal effect of fire to the adjacent tank in the presence of wind. Problems of Emergency Situations, 1(35), 239–253. doi: 10.52363/2524-0226-2022-35-18
  15. Basmanov,, Kulik Y. (2017). Estimation of the convection heat exchange rate for tank shells covered with falling water film. East journal of security studies, 1, 145–154. Available at: http://repositsc.nuczu.edu.ua/handle/123456789/6121
  16. Salamov,, Abramov, Y., Basmanov, O. (2019). Algorithm of determining the cooling effect of the water film flowing along the tank shell. Problems of fire safety, 46, 174–178. Available at: http://repositsc.nuczu.edu.ua/handle/123456789/11119
  17. Abramov,, Basmanov, O., Salamov, J., Mikhayluk, A., Yashchenko, O. (2019). Developing a model of tank cooling by water jets from hydraulic monitors under conditions of fire. Eastern-European Journal of Enterprise Technologies, Ecology, 1/10(97), 14–20. doi: 10.15587/1729-4061.2019.154669
  18. Elhelw, M., El-Shobaky, A., Attia, A., El-Maghlany, W. M. (2021). Advanced dynamic modeling study of fire and smoke of crude oil storage tanks. Process Safety and Environmental Protection, 46, 670–685. doi: 10.1016/j.psep.2020.12.002