Improving the efficiency of water fire extinguishing systems operation by using guanidine polymers

Maglyovana, Tatyana; Nyzhnyk, Taras; Stas, Serhiy; Kolesnikov, Denis; Стрикаленко, Т В

doi:10.15587/1729-4061.2020.196881

Cited by 3 publications

(2 citation statements)

References 8 publications

(9 reference statements)

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“…Doublesided polymeric PFHs with a diameter of 51 mm were almost not extended. Since fire hoses transported water, the properties of which differ significantly from some other extinguishing agents, it is advisable to conduct experiments using other liquids similar to those in [19][20][21]. In this way, it will be possible to develop new approaches to reducing dissipative losses during transportation of liquids to jet-forming devices.…”

Section: Discussion Of Results Of Determining the Elongation Of Press...mentioning

confidence: 99%

Determining the elongation of T-type pressure fire hoses based on full-scale experiments

Stas,

Bychenko,

Kolesnikov

et al. 2023

EEJET

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The phenomenon of changing the geometric parameters of pressure fire hoses is manifested when they transport extinguishing liquids. Although the extension of pressure fire hoses does not have a significant impact on the fire extinguishing process, the energy costs associated with such changes should be taken into account. In fact, part of the power of the fire pump is spent not on transporting liquids and forming extinguishing jets but on the «optional» lengthening of pressure fire hoses. Latex pressure fire hoses with diameters of 51 mm and 77 mm and fire pressure hoses with double-sided polymer coating of 51 mm (all of type T) were randomly selected for the experiments. The temperature was 263 K and 298 K, the fluid flow rate was constant, the pressure values at the inlet of the Protek 366 fire barrel had fixed values. No significant changes in the diameters (expansion or narrowing) of pressure fire hoses were recorded during water transportation. An elongation of 79 cm with a hose length of 1960 cm (73 cm with a hose length of 1790 cm) was recorded when transporting water in the case of using hoses with a diameter of 77 mm, a pressure at their inlet of 0.8 MPa, a temperature of 263 K, and a water flow rate of 0 l/s. The force that provided such a stretch was 2.04 kN. When extinguishing liquid was supplied by pressure fire hoses with a diameter of 77 mm in the temperature range of 263–298 K, the elongation decreased slightly with decreasing temperature. A slight unevenness of stretching of pressure fire hoses along the length was found when stretching increased closer to their middle. The results indicate the dependence of the amount of stretching on the materials from which pressure fire hoses are made, as well as their diameter. The values of dynamic forces that cause stretching of pressure fire hoses established in the study can be used in practice when taking into account the forced energy losses for fluid transportation

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Section: Discussion Of Results Of Determining the Elongation Of Press...mentioning

confidence: 99%

Determining the elongation of T-type pressure fire hoses based on full-scale experiments

Stas,

Bychenko,

Kolesnikov

et al. 2023

EEJET

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“…Зазначені вище результати дослідження поведінки пожежних рукавів під час подачі ними вогнегасних речовин [1] Хоч явище «розтягування» пожежних рукавів при транспортуванні ними вогнегасних рідин є відомим, врахування величини подовження для пожежних може бути корисним при створенні нових засобів пожежогасіння [3,4], у системах автоматичного водяного пожежогасіння [5,6], так і при використанні пожежних рукавів [7] або спеціальних пожежних стволів та насадок [8,9], або, наприклад, у випадках моделювання тривимірної поведінки гідравлічних рукавів під тиском при транспортуванні деяких рідин [10].…”

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Experimental Research of Geometric Parameters Change of the of Fire Hoses When Using the Protek 366 Nozzle

Stas,

Bychenko,

Pustovit

et al. 2022

HM and HU

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Main hose lines are usually laid to transport water and working solutions of foaming agents to the centre of the fire when extinguishing large fires or fires with hydrants for remote control. Their components are separate pressure fire hoses and they come in different diameters. As a result of their operation during the fire extinguishing substances transportation, fire hoses change their geometric parameters primarily their length. For different types of hoses and their different diameters, it has been established that their elongation occurs under hydrodynamic pressure. In some cases, when using a plug at the end of a fire hose, the relative elongation coefficient of fire hoses was 1,04. 3 types of hoses were used for the research: latex fire hoses with diameters of 51 mm and 77 mm type T and fire hoses with double-sided polymer coating with diameters of 51 mm type T. All hoses were previously used during the real work of fire calculations. The results presented in the paper are an averaging of each of the three hose types. The experiments were carried out under typical conditions in the open air using a Protek 366 fire barrel under constant fluid flow and different pressure values at its inlet. Fire hoses were placed on a horizontal surface. The elongation of fire hoses when they transport water depends on the physical and mechanical properties of the materials from which they are made, the pressure of the liquid at their inlet and consumption. The maximum elongation (62 cm with a hose length of 1960 cm, the relative elongation was 0,032) was recorded when transporting water with a fire hose in diameter of 77 mm at a pressure at its inlet of 1,0 MPa and a flow rate of 1,9 l/s. The questions of the change in head loss along the length were not considered. There were no significant changes in the diameters of fire hoses.

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Study of Organic Carbon-Containing Additives to Water Used in Fire Fighting, in Terms of Their Environmental Friendliness

Shcherbak,

Loboichenko,

Skorobahatko

et al. 2024

Fire Technol

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Improving the efficiency of water fire extinguishing systems operation by using guanidine polymers

Abstract: 20 lines in such systems has several features. An important task is to provide necessary conditions of movement of water extinguishing agents through pipelines to maximize the flow of fluid, a range of jets, etc. with minimal efforts [2].

Cited by 3 publications

References 8 publications

Determining the elongation of T-type pressure fire hoses based on full-scale experiments

Determining the elongation of T-type pressure fire hoses based on full-scale experiments

Experimental Research of Geometric Parameters Change of the of Fire Hoses When Using the Protek 366 Nozzle

Study of Organic Carbon-Containing Additives to Water Used in Fire Fighting, in Terms of Their Environmental Friendliness

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