Pub Date : 2018-12-31DOI: 10.32447/20786662.33.2018.11
D. Rudenko, A. Dominik
Conclusion.Coal is used as a technological raw material in the ferrous metallurgy and chemical industry for the production of mineral fertilizers and plastics, and coal is used as energy raw material for the production of electricity at thermal power plants, for heating residential and public buildings. The unsatisfactory state of the coal industry is due to interaction over a fairly long period of a number of factors, which by their nature have both objective and subjective character. Purpose.In order to enter the market economy, the branch needs restructuring, the main objectives of which are the formation of competitive coal enterprises, the consistent reduction of state support to the enterprises of the industry, the use of less energy consuming extractive equipment, the improvement of safety at work in mines, the provision of trouble-free work, as well as social security of industry workers. Methods. Empirical and theoretical methods. Results. In the event of a fire in the mining area of the mine and subsequent possible destruction of the elements of the bearing structures of the mining shaft, as already noted earlier, in many cases it is necessary to extinguish and rescue. The presence of combustion products makes it difficult to carry out these measures. Combustion products are characterized by a high temperature (over 1000 °C), which leads to the failure of the electronic (control system) and electrical equipment (rechargeable batteries, electric motors) of the robotic module. The heat flux studied also negatively affects the work of the robotic module. According to the technical instructions, rechargeable batteries can only operate at temperatures below 72 ºС. To protect the batteries from the heat flow, they are placed under the protective cover. However, the protective cover over time heats up and begins to heat the internal space of the robotic module, which increases the temperature of the battery. In order to provide the normal working conditions, it is necessary to install an additional insulating layer in addition to the metal cover of the multifunctional module, and from the outside it should be washed with a water solution. Introduction. Based on the calculations of the proposed conditions of torch combustion and experimental studies, it has been established that the time of continuous work of the robotic module is 50 minutes, but when extinguishing in the places of mine workings of the mine, the maneuverability is limited and therefore this time increases. On the other hand, the heat flow should not heat the module within the specified time to the critical temperature achieved by the system of cooling the surface.
{"title":"INFLUENCE OF HEAT FLOW ON MULTI-FUNCTIONAL ROBOTIC MODULE DURING EXTINGUISHING FIRES IN MINES","authors":"D. Rudenko, A. Dominik","doi":"10.32447/20786662.33.2018.11","DOIUrl":"https://doi.org/10.32447/20786662.33.2018.11","url":null,"abstract":"Conclusion.Coal is used as a technological raw material in the ferrous metallurgy and chemical industry for the production of mineral fertilizers and plastics, and coal is used as energy raw material for the production of electricity at thermal power plants, for heating residential and public buildings. The unsatisfactory state of the coal industry is due to interaction over a fairly long period of a number of factors, which by their nature have both objective and subjective character. \u0000Purpose.In order to enter the market economy, the branch needs restructuring, the main objectives of which are the formation of competitive coal enterprises, the consistent reduction of state support to the enterprises of the industry, the use of less energy consuming extractive equipment, the improvement of safety at work in mines, the provision of trouble-free work, as well as social security of industry workers. \u0000Methods. Empirical and theoretical methods. \u0000Results. In the event of a fire in the mining area of the mine and subsequent possible destruction of the elements of the bearing structures of the mining shaft, as already noted earlier, in many cases it is necessary to extinguish and rescue. The presence of combustion products makes it difficult to carry out these measures. Combustion products are characterized by a high temperature (over 1000 °C), which leads to the failure of the electronic (control system) and electrical equipment (rechargeable batteries, electric motors) of the robotic module. \u0000The heat flux studied also negatively affects the work of the robotic module. According to the technical instructions, rechargeable batteries can only operate at temperatures below 72 ºС. To protect the batteries from the heat flow, they are placed under the protective cover. However, the protective cover over time heats up and begins to heat the internal space of the robotic module, which increases the temperature of the battery. In order to provide the normal working conditions, it is necessary to install an additional insulating layer in addition to the metal cover of the multifunctional module, and from the outside it should be washed with a water solution. \u0000Introduction. Based on the calculations of the proposed conditions of torch combustion and experimental studies, it has been established that the time of continuous work of the robotic module is 50 minutes, but when extinguishing in the places of mine workings of the mine, the maneuverability is limited and therefore this time increases. On the other hand, the heat flow should not heat the module within the specified time to the critical temperature achieved by the system of cooling the surface.","PeriodicalId":12280,"journal":{"name":"Fire Safety","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81741096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-14DOI: 10.32447/20786662.32.2018.10
N. Ferents, Y. Pavliuk
The analysis of technical and operational properties of dry fire prevention devices was carried out. The properties of waste zeolite catalysts such as "Tseosor 5A" and their behavior in high temperature conditions were investigated. The efficiency of the use of waste zeolite catalyst "Tseosor 5A " as a flame retardant element of dry fire prevention devices was proved. The critical nozzle diameters of the fire prevention devices were calculated for various vapor-gas-air mixtures.
{"title":"FIRE PREVENTION DEVICES ON THE BASIS OF THE WASTE ZEOLITE CATALYSTS \"TSEOSOR 5A\"","authors":"N. Ferents, Y. Pavliuk","doi":"10.32447/20786662.32.2018.10","DOIUrl":"https://doi.org/10.32447/20786662.32.2018.10","url":null,"abstract":"The analysis of technical and operational properties of dry fire prevention devices was carried out. The properties of waste zeolite catalysts such as \"Tseosor 5A\" and their behavior in high temperature conditions were investigated. The efficiency of the use of waste zeolite catalyst \"Tseosor 5A \" as a flame retardant element of dry fire prevention devices was proved. The critical nozzle diameters of the fire prevention devices were calculated for various vapor-gas-air mixtures.","PeriodicalId":12280,"journal":{"name":"Fire Safety","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82332705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-14DOI: 10.32447/20786662.32.2018.08
O. Pazen, S. Vovk, O. Bashynskyi, M. Peleshko
The article deals with the current problem of determining the fire resistance of protected steel elements of building structures. Based on the analysis of literary sources, the main methods for increasing the fire resistance of steel structures are considered, as well as the use of fire retardant coatings based on polymetallophenylsiloxane. Analytical studies were conducted to determine the time of fire protection of the coating, compared to unprotected structures. The results show that the limit of fire resistance of protected steel constructions is increased 2-4 times, depending on the thickness of the application.
{"title":"DEFINITION OF EFFICIENCY OF POLYMETHYLPHENYLSІLOXANE-BASED FIRE PROTECTIVE COATINGS FOR STEEL BUILDING STRUCTURES","authors":"O. Pazen, S. Vovk, O. Bashynskyi, M. Peleshko","doi":"10.32447/20786662.32.2018.08","DOIUrl":"https://doi.org/10.32447/20786662.32.2018.08","url":null,"abstract":"The article deals with the current problem of determining the fire resistance of protected steel elements of building structures. Based on the analysis of literary sources, the main methods for increasing the fire resistance of steel structures are considered, as well as the use of fire retardant coatings based on polymetallophenylsiloxane. Analytical studies were conducted to determine the time of fire protection of the coating, compared to unprotected structures. The results show that the limit of fire resistance of protected steel constructions is increased 2-4 times, depending on the thickness of the application.","PeriodicalId":12280,"journal":{"name":"Fire Safety","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72758965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-14DOI: 10.32447/20786662.32.2018.09
O. Ukhanska, N. Shtangret
The article deals with the mathematical model for determining the step time and distance covered by the droplet of liquid till the moment of contact with the horizontal plane. Numerical values of the step time and distance covered till the moment of contact with the horizontal plane are obtained. Experimental studies aimed on determining the effective diameter of the droplet are performed. According to effective diameter value an effective mass of the droplet is determined. After obtaining the effective mass value the step time and distance covered by the droplet of liquid till the moment of contact with the horizontal plane are calculated using a mathematical model.
{"title":"MATHEMATICAL MODEL FOR DETERMINING THE STEP TIME AND DISTANCE COVERED BY THE DROPLETS OF LUQUID FIRE-FIGHTING AGENT DURING THE PROCESS OF FIRE EXTINGUISHING IN THE CLOSED ROOM","authors":"O. Ukhanska, N. Shtangret","doi":"10.32447/20786662.32.2018.09","DOIUrl":"https://doi.org/10.32447/20786662.32.2018.09","url":null,"abstract":"The article deals with the mathematical model for determining the step time and distance covered by the droplet of liquid till the moment of contact with the horizontal plane. Numerical values of the step time and distance covered till the moment of contact with the horizontal plane are obtained. Experimental studies aimed on determining the effective diameter of the droplet are performed. According to effective diameter value an effective mass of the droplet is determined. After obtaining the effective mass value the step time and distance covered by the droplet of liquid till the moment of contact with the horizontal plane are calculated using a mathematical model.","PeriodicalId":12280,"journal":{"name":"Fire Safety","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90625925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-14DOI: 10.32447/20786662.32.2018.07
V. Marych, V. Kovalyshyn, Ya. B. Kyryliv, V. Kovalchyk, B. Gusar, V. Koshelenko
During the researches, carried out in the article, sodium chloride recommended itself as the best fire-extinguishing substance. In order to give it the properties of a fire extinguishing powder, two more components were added to it, namely ground slag and aerosil. These components were chosen according to their physical and chemical properties. As evidenced by the corresponding quenching parameters, the optimal composition of the fire extinguishing powder was established on the basis of performed experiments and obtained dependences. The properties of the fire extinguishing powder were improved by adding ground slag and aerosil. These additives increase the heat resistance, insulating and anti-caking ability, fluidity and fire-extinguishing efficiency of the powder. The best results were obtained after using the extinguishing powder of such composition: sodium chloride - 73.5%, ground slag - 25%, aerosil - 1.5%. Experimental-empirical dependence for determination the extinguishing intensity according to the extinguishing parameters and the fire-extinguishing composition was developed.
{"title":"OPTIMIZATION OF THE DRY CHEMICAL POWDERS’ COMPOSITION FOR CLASS D1 FIRES EXTINGUISHING","authors":"V. Marych, V. Kovalyshyn, Ya. B. Kyryliv, V. Kovalchyk, B. Gusar, V. Koshelenko","doi":"10.32447/20786662.32.2018.07","DOIUrl":"https://doi.org/10.32447/20786662.32.2018.07","url":null,"abstract":"During the researches, carried out in the article, sodium chloride recommended itself as the best fire-extinguishing substance. In order to give it the properties of a fire extinguishing powder, two more components were added to it, namely ground slag and aerosil. These components were chosen according to their physical and chemical properties. As evidenced by the corresponding quenching parameters, the optimal composition of the fire extinguishing powder was established on the basis of performed experiments and obtained dependences. The properties of the fire extinguishing powder were improved by adding ground slag and aerosil. These additives increase the heat resistance, insulating and anti-caking ability, fluidity and fire-extinguishing efficiency of the powder. The best results were obtained after using the extinguishing powder of such composition: sodium chloride - 73.5%, ground slag - 25%, aerosil - 1.5%. Experimental-empirical dependence for determination the extinguishing intensity according to the extinguishing parameters and the fire-extinguishing composition was developed.","PeriodicalId":12280,"journal":{"name":"Fire Safety","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80703400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-14DOI: 10.32447/20786662.32.2018.12
R. Yakovchuk, A. Kuzyk, O. Miller, A. Lyn
The paper analyzes the problems associated with the fire hazard of the application of thermal insulation and finishing systems of facades of buildings, which directly depends on the design solution of the thermal insulation system and the type of thermal insulation material. The generalized requirements for physical and technical indicators of the quality of heat-insulating materials; the possibility of applying facade heat insulation structures depending on their class, the height of the houses and the combustibility of the materials of the heat-insulating and finishing layers; fire-technical characteristics of expanded polystyrene are considered. The threats of fire spreading by thermal insulation systems of facades are analyzed and possible ways of its propagation between floors are considered. It is concluded that the use of combustible thermal insulating materials poses an increased danger to life and health of people during a fire. The problem of ensuring the fire safety of buildings, in which the insulation and finishing systems of exterior walls are used, depends on a number of factors and requires a more thorough study.
{"title":"HEAT INSULATION-APPARATUS SYSTEMS OF HOUSEHOLD FACADE AS A FACTOR OF INCREASED FIRE HAZARD","authors":"R. Yakovchuk, A. Kuzyk, O. Miller, A. Lyn","doi":"10.32447/20786662.32.2018.12","DOIUrl":"https://doi.org/10.32447/20786662.32.2018.12","url":null,"abstract":"The paper analyzes the problems associated with the fire hazard of the application of thermal insulation and finishing systems of facades of buildings, which directly depends on the design solution of the thermal insulation system and the type of thermal insulation material. \u0000The generalized requirements for physical and technical indicators of the quality of heat-insulating materials; the possibility of applying facade heat insulation structures depending on their class, the height of the houses and the combustibility of the materials of the heat-insulating and finishing layers; fire-technical characteristics of expanded polystyrene are considered. The threats of fire spreading by thermal insulation systems of facades are analyzed and possible ways of its propagation between floors are considered. \u0000It is concluded that the use of combustible thermal insulating materials poses an increased danger to life and health of people during a fire. The problem of ensuring the fire safety of buildings, in which the insulation and finishing systems of exterior walls are used, depends on a number of factors and requires a more thorough study.","PeriodicalId":12280,"journal":{"name":"Fire Safety","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83982361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-14DOI: 10.32447/20786662.32.2018.11
O. Scherbyna
The methods of isolation, purification and qualitative and quantitative determination of phenol in air and biological fluids of an organism are offered. Isolation was carried out by distillation with water vapor, purification by extraction with chloroform, and identification by qualitative reactions, by chromatography in a thin layer of sorbent and by liquid chromatography. The quantitative determination of phenol was carried out by liquid chromatography in a reverse phase (chromatograph "Tsvet-304" with an ultraviolet detector). Calculation of the quantitative content of phenol was carried out by the method of absolute calibration. As a result of the research, it was found that by using the molecular liquid chromatography method, it is possible to determine 17-20% of phenol isolated from urine and 21-24% isolated from the air. The retention time of phenol 1h.14s, the results of the analysis are well reproducible. The worked out techniques have high resolution, high sensitivity and speed of analysis.
{"title":"EXPERIMENTAL STUDIES ON THE DETECTION AND QUANTIFICATION OF VOLATILE FLAMMABLE AND TOXIC SUBSTANCES IN THE AIR AND BIOLOGICAL FLUIDS OF THE ORGANISM","authors":"O. Scherbyna","doi":"10.32447/20786662.32.2018.11","DOIUrl":"https://doi.org/10.32447/20786662.32.2018.11","url":null,"abstract":"The methods of isolation, purification and qualitative and quantitative determination of phenol in air and biological fluids of an organism are offered. Isolation was carried out by distillation with water vapor, purification by extraction with chloroform, and identification by qualitative reactions, by chromatography in a thin layer of sorbent and by liquid chromatography. The quantitative determination of phenol was carried out by liquid chromatography in a reverse phase (chromatograph \"Tsvet-304\" with an ultraviolet detector). Calculation of the quantitative content of phenol was carried out by the method of absolute calibration. As a result of the research, it was found that by using the molecular liquid chromatography method, it is possible to determine 17-20% of phenol isolated from urine and 21-24% isolated from the air. The retention time of phenol 1h.14s, the results of the analysis are well reproducible. The worked out techniques have high resolution, high sensitivity and speed of analysis.","PeriodicalId":12280,"journal":{"name":"Fire Safety","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81557272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-13DOI: 10.32447/20786662.32.2018.01
T. Voitovych, B. Gusar, V. Kovalyshyn, V. Koshelenko, O. V. Grushovinchuk
This research outlines the problems of fire extinguishing in tanks, and describes a projected model of an experimental installation for the vertical tank fire simulation. The research also describes a method of extinguishing fires of oil and petroleum products in vertical steel tanks by supplying low expansion foam to the tank base directly into the fuel layer. The time of diesel fuel and gasoline fires extinguishing with the help of general and special purpose fire-fighting foam agents was calculated. Experimental investigations on definition of the fire-extinguishing efficiency of domestically producted fire-fighting foam agents by subsurface fire extinguishing of tanks were carried out.
{"title":"RESEARCH ON DOMESTICALLY PRODUCED FIRE-FIGHTING FOAM AGENTS FOR SUBSURFACE FIRE EXTINGUISHING","authors":"T. Voitovych, B. Gusar, V. Kovalyshyn, V. Koshelenko, O. V. Grushovinchuk","doi":"10.32447/20786662.32.2018.01","DOIUrl":"https://doi.org/10.32447/20786662.32.2018.01","url":null,"abstract":"This research outlines the problems of fire extinguishing in tanks, and describes a projected model of an experimental installation for the vertical tank fire simulation. The research also describes a method of extinguishing fires of oil and petroleum products in vertical steel tanks by supplying low expansion foam to the tank base directly into the fuel layer. The time of diesel fuel and gasoline fires extinguishing with the help of general and special purpose fire-fighting foam agents was calculated. Experimental investigations on definition of the fire-extinguishing efficiency of domestically producted fire-fighting foam agents by subsurface fire extinguishing of tanks were carried out.","PeriodicalId":12280,"journal":{"name":"Fire Safety","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73484736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-13DOI: 10.32447/20786662.32.2018.04
V. Kovalchyk, O. Lazarenko, R. Kindzer, R. Sukach
The brake release system of the pumper AЦ - 4 - 60 (5309) - 505М is considered in the work. Nowadays those fire engines are supplied to the divisions of the State Emergency Service of Ukraine. The tactical and technical characteristics of the pumper including the braking system were analysed. Due to the results of the analysis we proposed to equip the pneumatic drive of the pumper with an additional compressed air tank, which is used by the units of the gas-smoke rescue service of the SES of Ukraine. Introduction of such a tank can significantly facilitate the daily work of drivers and reduce the time of departure at least by 11,59 %.
{"title":"IMPROVEMENT OF THE BRAKE RELEASE SYSTEM OF THE PUMPER АЦ–4–60(5309)–505М","authors":"V. Kovalchyk, O. Lazarenko, R. Kindzer, R. Sukach","doi":"10.32447/20786662.32.2018.04","DOIUrl":"https://doi.org/10.32447/20786662.32.2018.04","url":null,"abstract":"The brake release system of the pumper AЦ - 4 - 60 (5309) - 505М is considered in the work. Nowadays those fire engines are supplied to the divisions of the State Emergency Service of Ukraine. The tactical and technical characteristics of the pumper including the braking system were analysed. Due to the results of the analysis we proposed to equip the pneumatic drive of the pumper with an additional compressed air tank, which is used by the units of the gas-smoke rescue service of the SES of Ukraine. Introduction of such a tank can significantly facilitate the daily work of drivers and reduce the time of departure at least by 11,59 %.","PeriodicalId":12280,"journal":{"name":"Fire Safety","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89350912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-13DOI: 10.32447/20786662.32.2018.02
E. Gulida
The methodology of determining the thermal balance during fires in closed room was developed. Thermal balance during a fire is primarily influenced by the temperature of the seat of fire. This temperature depends on the burning rate of combustion products, the area of the fire and its duration and the mass of gas in the volume of the room. The lower calorific value also has a significant effect on the of thermal balance. The value of the heat flow, which passes into the walls of the room at all stages of the fire, was estimated. Analytic expression for determining the heat absorption coefficient depending on the duration of free burning was obtained. The results of research show that the heat absorption coefficient φ is not a constant value – during the fire it changes its value and reaches a maximum (no more than 0.5). Increasing of the volume of the room leads to increasing of the heat loss (more heat goes into the environment), which reduces the thermal load on the building structures.
{"title":"DISTRIBUTION OF THERMAL BALANCE DURING FIRES IN CLOSED ROOMS","authors":"E. Gulida","doi":"10.32447/20786662.32.2018.02","DOIUrl":"https://doi.org/10.32447/20786662.32.2018.02","url":null,"abstract":"The methodology of determining the thermal balance during fires in closed room was developed. Thermal balance during a fire is primarily influenced by the temperature of the seat of fire. This temperature depends on the burning rate of combustion products, the area of the fire and its duration and the mass of gas in the volume of the room. The lower calorific value also has a significant effect on the of thermal balance. The value of the heat flow, which passes into the walls of the room at all stages of the fire, was estimated. Analytic expression for determining the heat absorption coefficient depending on the duration of free burning was obtained. The results of research show that the heat absorption coefficient φ is not a constant value – during the fire it changes its value and reaches a maximum (no more than 0.5). Increasing of the volume of the room leads to increasing of the heat loss (more heat goes into the environment), which reduces the thermal load on the building structures.","PeriodicalId":12280,"journal":{"name":"Fire Safety","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79755602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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