Determining performance characteristics of jet water-gas ejectors for an opening in a vertical fencing structure

Authors

DOI:

https://doi.org/10.15587/1729-4061.2024.305828

Keywords:

water-gas jet ejector, combustion products, gas-air medium, flow movement

Abstract

The object of this study is jet water-gas ejectors (JWGEs) in the system for ensuring fire safety of ships. The problem that was solved: in the event of a fire, in the shortest possible time, a high temperature rises in the area of ​​the exit from the ship's emergency room and a large amount of smoke spreads throughout the ship's premises. These factors require immediate sealing of the emergency room, which limits the immediate access of emergency teams to the interior. Installation of a local air support system based on JWGE in the doorway could make it possible to shield thermal energy and localize smoke gases in the emergency room without sealing it to ensure prompt access of emergency teams. The main results that were achieved relate to the adequacy of theoretical studies on the processes of localization of flue gases in the emergency room without its sealing confirmed by the experimental method. The investigated problem was solved by optimizing processes: the intensity of smoke emission from the working characteristics of jet water-gas ejectors; the rate of change of the natural indicator of the weakening of the environment at the start of JWGE system; speed of reaching the required temperature from the time in the adjacent room. Special feature of the results was the formation of an air curtain, obtained by the selection of a part of high-temperature flue gases into the JWGE housing, their heat and mass exchange treatment and output back into the flow. This created conditions under which thermal energy shielding occurs with a fairly high efficiency of 85–88 %. And it was also established that the decrease in the intensity of gas exchange through the open hole, in which the JWGE works, occurs already at the 0.3 MPa regime in the fire pipeline. The scope and conditions of practical use of the reported results are shipbuilding and ship fire safety design

Author Biography

Serhii Hrynchak, Naval Institute of the National University "Odesa Maritime Academy"

PhD

Research Center of the Armed Forces of Ukraine "Derzhavnyi Okeanarium"

References

  1. Gatchell, W. (2003). Shipboard Firefighting: The Basics. Fire Engineering. Available at: https://www.fireengineering.com/leadership/shipboard-firefightingthe-basics/#gref
  2. Preparing for Shipboard Fires (2008). FirefighterNation. Available at: https://www.firefighternation.com/firerescue/preparing-for-shipboard-fires/#gref
  3. Rules for Classification and Construction. Available at: https://www.academia.edu/10856770/Rules_for_Classification_and_Construction_I_Ship_Technology_1_Seagoing_Ships_5_Structural_Rules_for_Container_Ships_Edition_2013
  4. PART IV: SOLAS CHAPTER II-2 Construction – Fire protection, fire detection and fire extinction. Available at: https://tc.canada.ca/en/marine-transportation/marine-safety/part-iv-solas-chapter-ii-2-construction-fire-protection-fire-detection-fire-extinction
  5. Miroshnichenko, V. N., Sokolov, V. V., Sheverev, Ye. Yu. (2002). Issledovanie dymoosazhdayushchey i okhlazhdayushchey effektivnosti ustroystv UDP GIBK. 065289.001 [Study of the smoke suppression and cooling efficiency of the devices UIB GIBC. 065289.001]. Naukoviy vіsnik UkrNDІPB - Scientific Bulletin: Civil Protection and Fire Safety, 1 (5), 76–82.
  6. Zatsarinnaya, T. G. (2004). Lokalizatsiya gazovozdushnogo potoka (dyma) vodyanoy zavesoy reguliruemoy tolshchiny orosheniya [Localization of the gas-air flow (smoke) with a water curtain of an adjustable irrigation thickness]. Zbіrnyk naukovykh prats - Collection of scientific publications, 1 (4), 238–243.
  7. Kuripko, O. V., Nikitin, Ye. V., Anokhin, G. A. (2002). Povyshenie ognestoykosti korabelnykh ograzhdayushchikh konstruktsiy: puti i metody issledovaniy [Increase of fire resistance of shipboard enclosing structures: ways and methods of research]. Zbіrnyk naukovykh prats – Collection of scientific publications, 1, 164–169.
  8. Blintsov, V., Hrynchak, S. (2017). Development of the improved methods of fight against distribution of smoke on ship with systems of jet water–gas ejectors. EUREKA: Physics and Engineering, 6, 35–41. https://doi.org/10.21303/2461-4262.2017.00498
  9. Blintsov, V. S., Hrynchak, S. O. (2017). Teoretychne obgruntuvannia metodu proektuvannia korabelnykh otvoriv iz zastosuvanniam systemy pidporu povitria na osnovi strumynnoho vodohazovoho aparatu [Theoretical substantiation of the method of designing ship openings with application of the air support system on the basis of jet water and gas apparatus]. Zbirnyk naukovykh prats NUK im. admirala Makarova, 3, 10–31.
  10. Oehlert, G. W. (2010). A first course in design and analysis of experiments. University of Minnesota, 679. Available at: http://users.stat.umn.edu/~gary/book/fcdae.pdf
  11. Antony, J. (2014). Design of Experiments for Engineers and Scientists. Elsevier. https://doi.org/10.1016/c2012-0-03558-2
  12. Design of Engineering Experiments. Available at: https://www.studysmarter.co.uk/explanations/engineering/professional-engineering/design-of-engineering-experiments/
  13. Roy, R. K. (2001). Design of experiments using the Taguchi approach: 16 Steps to product and process improvement. Wiley.
  14. Mayerhöfer, T. G., Pahlow, S., Popp, J. (2020). The Bouguer‐Beer‐Lambert Law: Shining Light on the Obscure. ChemPhysChem, 21 (18), 2029–2046. https://doi.org/10.1002/cphc.202000464
Determining performance characteristics of jet water-gas ejectors for an opening in a vertical fencing structure

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Published

2024-06-28

How to Cite

Hrynchak, S. (2024). Determining performance characteristics of jet water-gas ejectors for an opening in a vertical fencing structure. Eastern-European Journal of Enterprise Technologies, 3(10 (129), 21–32. https://doi.org/10.15587/1729-4061.2024.305828

Issue

Vol. 3 No. 10 (129) (2024): Ecology

Section

Ecology

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Copyright (c) 2024 Serhii Hrynchak

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