DEVELOPMENT OF A TEST SAMPLE OF A SYSTEM FOR GENERATING AND SUPPLYING COMPRESSED AIR FOAM

Authors

  • A. Kodryk Institute of Public Administration and Research in Civil Protection
  • O. Titenko Institute of Public Administration and Research in Civil Protection
  • S. Vynohradov National University of Civil Protection of Ukraine
  • S. Shakhov National University of Civil Protection of Ukraine
  • D. Hryshchenko National University of Civil Protection of Ukraine

DOI:

https://doi.org/10.33042/2522-1809-2024-4-185-172-177

Keywords:

compressed air foam, class A fires, compressed air foam systems, modified additives

Abstract

An effective fire extinguishing agent for class A fires is the compressed air foam formed in Compressed Air Foam Systems (СAFS). Such systems have become widespread in leading countries such as the USA, Germany, China, and others. It is worth noting that the technical parameters of CAFS (intensity and consumption of an aqueous solution of foaming agent/air), implemented in the practice of fire extinguishing in the form of industrial samples, are designed and manufactured in such a way as to ensure effective extinguishing of developed fires of a significant area. When using existing samples for obtaining compression foam, a problem arises, which lies in the limited possibilities of regulating the supply of compression foam (intensity and consumption of the aqueous solution of the foaming agent/air), under which it is possible to use it with modified additives when extinguishing laboratory fires of solid combustible materials, and the lack of a smooth regulation of its supply. As a result of the research, the authors proposed a compressed air foam system to study its properties with the content of modified additives when changing the composition of the liquid and air that make it up. The manufactured system has the following parameters: multiplicity of 4–20, working pressure of systems of 4–8 bar, smooth adjustment of the consumption of aqueous solution/foaming agent of 2–20 l/min, and smooth adjustment of gas fraction consumption of 8–450 l/min. In particular, it is possible to adjust the consumption of the aqueous solution of the foaming agent and air, to work in dependant and autonomous mode, to regulate the intensity of the foam supply using nozzles of different diameters, and to change the porosity of the porous body in the foam generator. Further, we developed a system for measuring the flow of aqueous solution and air, which is a hardware and software complex. The system allows saving the measurement results to a PC in the form of an Excel spreadsheet for further development of dependencies and simultaneously displaying the flow rate of the aqueous foaming agent solution and air on the display screen and PC in real-time.

Author Biographies

A. Kodryk, Institute of Public Administration and Research in Civil Protection

Candidate of Technical Sciences, Senior Researcher

O. Titenko, Institute of Public Administration and Research in Civil Protection

Candidate of Technical Sciences, Senior Researcher

S. Vynohradov, National University of Civil Protection of Ukraine

Candidate of Technical Sciences, Associate Professor at the Department of Engineering and Rescue Machinery

S. Shakhov, National University of Civil Protection of Ukraine

PhD, Senior Lecturer at the Department of Engineering and Rescue Machinery

D. Hryshchenko, National University of Civil Protection of Ukraine

Adjunct

References

Shakhov, S.M., Vinogradov, S.A. (2020). The efficiency of the compressed air foam, water and gel extinguishing agent on the standard model fire class A. Safety & Fire Technology, 1(56), 154–160.

Galla, S., Štefanický, B., Majlingová, A. (2017). Experimental comparison of the fire extinguishing properties of the firesorb. Gel and water. 7th International Multidisciplinary Scientific GeoConference SGEM, 17(51), 439-446.

Liang, T, Li, R, Li, J, et al. (2018). Extinguishment of hydrocarbon pool fires by ultrafine water mist with ammonium/amidogen compound in an improved cup burner. Fire and Materials. Vol. 42. Р. 889– 896. Retrieved from: https://doi.org/10.1002/fam.2644

Zhe Dong, Shao-Kun Wei, and Lin-Shuang Zhao. (2019). Experimental Study on Synergistic Fire Extinguishing between Different Potassium Additives in Water Mist. International Journal of Environmental Science and Development. Vol. 10, No. 2. P. 75-78. doi: 10.18178/ijesd.2019.10.2.1150.

Park, J., Kwark, J. (2021). Experimental Study on Fire Sources for Full-Scale Fire Testing of Simple Sprinkler Systems Installed in Multiplexes. Fire, 4(8).

Wanhai, G., Guoqing, Z, Bin, Y. (2021). Study on the fire extinguishing mechanism of small size wood crib based on small sand-throwing equipment. Case Studies in Thermal Engineering, 25, 1-11.

HNE Fightingfire [electronic resource] // HNE Fightingfire - Access mode: https://www.hne.ag/de/produkte

Rosenbauer [electronic resource] // Rosenbauer - Access mode: https://www.rosenbauer.com/de/ch/world

Oneseven [electronic resource] // Oneseven - Access mode: http://www.oneseven.com/

CAFS-Systems [electronic resource] // Waterous co. - Access mode: http://www.waterousco.com/cafs-systems.html

Shakhov, S.M., Vinogradov, S.A., Kodryk, A.I., Titenko, O.M. (2020). Increasing the efficiency of using compression foam supply systems. Problems of fire safety, 48, 127-131.

Shakhov, S.M., Kodryk, A.I., Titenko, O.M., Vinogradov, S.A. (2020). Mathematical support for the design of compression foam generation systems. Scientific Bulletin of NLTU of Ukraine, 3(30), 111-115.

Shakhov, S.M., Vinogradov, S.A., Kodrik, A.I., Titenko, O.M., Parkhomchyk, O.V. (2020). Mathematical modeling of gas-liquid flow in compressed air foam generation systems. Technology audit and production reserves, 4/3(54), 29-35.

Published

2024-09-06

How to Cite

Kodryk, A., Titenko, O., Vynohradov, S., Shakhov, S., & Hryshchenko, D. (2024). DEVELOPMENT OF A TEST SAMPLE OF A SYSTEM FOR GENERATING AND SUPPLYING COMPRESSED AIR FOAM. Municipal Economy of Cities, 4(185), 172–177. https://doi.org/10.33042/2522-1809-2024-4-185-172-177