Pub Date : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055818
Weisong Fan, Haoyu Wang, P. Zhou
To solve the difficulty of fire compartmentation in large exhibition halls with large areas, the method of setting a fire isolation belt with a certain width in the buildings was proposed. The location and width of the fire isolation belt were analyzed and calculated by the point-source model and the numerical simulation method with an engineering case as an example. Results showed that the 8.5 m-wide fire isolation belt could effectively prevent the spread of fire. Its reliability was further analyzed and demonstrated by FDS simulation. Finally, the design of a fire isolation belt was proved to be feasible.
{"title":"Application of the Fire Isolation Belt in Large Museum Exhibition Hall","authors":"Weisong Fan, Haoyu Wang, P. Zhou","doi":"10.1109/ICFSFPE48751.2019.9055818","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055818","url":null,"abstract":"To solve the difficulty of fire compartmentation in large exhibition halls with large areas, the method of setting a fire isolation belt with a certain width in the buildings was proposed. The location and width of the fire isolation belt were analyzed and calculated by the point-source model and the numerical simulation method with an engineering case as an example. Results showed that the 8.5 m-wide fire isolation belt could effectively prevent the spread of fire. Its reliability was further analyzed and demonstrated by FDS simulation. Finally, the design of a fire isolation belt was proved to be feasible.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"251 ","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91460732","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 : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055847
Songtao Zhou, Wenhao Huangfu, Fei You, Dan Li, Dan-dan Fan
Sol-gel method was used by taking tetraethyl orthosilicate (TEOS) as precursor, ethanol (C2H5OH) as solvent and hydrochloric acid (HCl) as catalyst, 1-γ-methacryloxypropyl trimethoxysilane (KH570) as a coupling agent for preparations of SiO2, KH570 and 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO, flame retardant) sols to improve flame retardancy and thermal stability of cotton fabrics. Dipping-baking process was used for finishing cotton fabrics. Surface morphology, surface functional group and element distribution, intrinsic crystal structure, pyrolysis characteristics and flame retardancy of cotton fabrics were characterized by Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), thermogravimetric analysis (TG), and limiting oxygen index (LOI). Results show that DOPO and SiO2sol have good synergistic flame retardant effect. Cotton fabric finished by hybrid sol of SiO2-KH570-DOPO has the best flame retardant effect, its LOI is 22.8 %, ΔLOI/Δm is 4.20 %/g. DOPO-contained hybrid sol can promote formation of three-dimensional microscopic gel coating and residual char in condensed phase.
{"title":"Flame Retardancy and Mechanism of Cotton Fabric Finished by Phosphorus Containing SiO2 Hybrid Sol","authors":"Songtao Zhou, Wenhao Huangfu, Fei You, Dan Li, Dan-dan Fan","doi":"10.1109/ICFSFPE48751.2019.9055847","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055847","url":null,"abstract":"Sol-gel method was used by taking tetraethyl orthosilicate (TEOS) as precursor, ethanol (C2H5OH) as solvent and hydrochloric acid (HCl) as catalyst, 1-γ-methacryloxypropyl trimethoxysilane (KH570) as a coupling agent for preparations of SiO2, KH570 and 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO, flame retardant) sols to improve flame retardancy and thermal stability of cotton fabrics. Dipping-baking process was used for finishing cotton fabrics. Surface morphology, surface functional group and element distribution, intrinsic crystal structure, pyrolysis characteristics and flame retardancy of cotton fabrics were characterized by Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), thermogravimetric analysis (TG), and limiting oxygen index (LOI). Results show that DOPO and SiO2sol have good synergistic flame retardant effect. Cotton fabric finished by hybrid sol of SiO2-KH570-DOPO has the best flame retardant effect, its LOI is 22.8 %, ΔLOI/Δm is 4.20 %/g. DOPO-contained hybrid sol can promote formation of three-dimensional microscopic gel coating and residual char in condensed phase.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"12 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85567872","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 : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055876
Yanfei Wang, Fudong Zhang, Xu Liu
Forest fires cause serious losses to people's life and property safety, and seriously damage the ecological balance. Therefore, it is necessary to study the functional system and strategies of forest firefighting. In this paper, the characteristics of forest fire fighting are analyzed. It is found that forest fire has the characteristics of many combustibles, large area of fire, fast the spread of the speed and high intensity of fire. It takes a long time to put out forest fire. In the forest fire fighting, it also has the characteristics of high risk and uncertain risk factors, which affect fire fighting safety. Aiming at these difficulties and risk factors in forest fire fighting, this paper discusses and studies the fire fighting function system, and puts forward the function system of forest fire fighting and rescue based on cognition, command, control and support function modules, referred to as CCCS function system, in order to improve the efficiency of forest fire fighting. Based on this system, some fire extinguishing strategies are put forward, hoping to provide some reference for forest fire extinguishing and rescue.
{"title":"Research on Functional System and Strategies of Forest Firefighting","authors":"Yanfei Wang, Fudong Zhang, Xu Liu","doi":"10.1109/ICFSFPE48751.2019.9055876","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055876","url":null,"abstract":"Forest fires cause serious losses to people's life and property safety, and seriously damage the ecological balance. Therefore, it is necessary to study the functional system and strategies of forest firefighting. In this paper, the characteristics of forest fire fighting are analyzed. It is found that forest fire has the characteristics of many combustibles, large area of fire, fast the spread of the speed and high intensity of fire. It takes a long time to put out forest fire. In the forest fire fighting, it also has the characteristics of high risk and uncertain risk factors, which affect fire fighting safety. Aiming at these difficulties and risk factors in forest fire fighting, this paper discusses and studies the fire fighting function system, and puts forward the function system of forest fire fighting and rescue based on cognition, command, control and support function modules, referred to as CCCS function system, in order to improve the efficiency of forest fire fighting. Based on this system, some fire extinguishing strategies are put forward, hoping to provide some reference for forest fire extinguishing and rescue.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"20 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91157056","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}
In recent years, the frequent fire accidents of public transport vehicles have resulted in the scrapping of vehicles, catastrophic property losses and casualties, which had drawn widespread concern of people and society for public safety. The passenger cabin space of bus is relatively small. Once a fire occurred, high temperature, thermal radiation and smoke generated by combustion will cause great difficulties for personnel evacuation. Aiming at the requirements of Chinese GA1264-2015, this paper carried out full-scale fire-extinguishing experiments in the bus cabin. The parameters of temperature distribution, smoke concentration and fire-fighting time in the passenger cabin of the bus are analyzed, so as to verify the fire-fighting performance of the self-developed water-based fire extinguishing agent and the fixed fire-extinguishing system in the passenger cabin. The system can put out fire quickly and efficiently. Moreover, it can effectively reduce temperature and concentration of toxic and harmful gases in the cabin after the fire. It could obviously improve the fire protection capacity.
{"title":"Experimental Study on Fire Extinguishing Effect of Water-based Fixed Fire Extinguishing System in full-Scale Bus Cabin","authors":"Yanying Cheng, Chunjie Mou, Ke Chen, Hui Bai, Yu Liu, Yu-chun Zhang","doi":"10.1109/ICFSFPE48751.2019.9055834","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055834","url":null,"abstract":"In recent years, the frequent fire accidents of public transport vehicles have resulted in the scrapping of vehicles, catastrophic property losses and casualties, which had drawn widespread concern of people and society for public safety. The passenger cabin space of bus is relatively small. Once a fire occurred, high temperature, thermal radiation and smoke generated by combustion will cause great difficulties for personnel evacuation. Aiming at the requirements of Chinese GA1264-2015, this paper carried out full-scale fire-extinguishing experiments in the bus cabin. The parameters of temperature distribution, smoke concentration and fire-fighting time in the passenger cabin of the bus are analyzed, so as to verify the fire-fighting performance of the self-developed water-based fire extinguishing agent and the fixed fire-extinguishing system in the passenger cabin. The system can put out fire quickly and efficiently. Moreover, it can effectively reduce temperature and concentration of toxic and harmful gases in the cabin after the fire. It could obviously improve the fire protection capacity.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"43 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91202047","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 : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055802
Peng Zhao, Zhongyuan Yuan, Nanyang Yu
In recent years, point extraction ventilation mode is considered as a competitive alternative to control the smoke in the tunnel fire. The principle of point extraction ventilation is that sufficient exhaust volumetric flow rate is supplied to confine the smoke to an acceptable zone. However, the issue of an appropriate exhaust volumetric flow rate to confine the smoke to a safe zone has not been studied sufficiently. In this study, the critical exhaust volumetric flow rate to control the smoke to the zone between two extraction vents was proposed and a series of small-scale experiments were carried out to investigate the effect of extraction vent length on the critical exhaust volumetric flow rate. The heat release rate (HRR), extraction vent length and the distance between two vents varied during the tests. Smoke temperature below the ceiling and smoke configurations were measured and analyzed. Experimental results show that it is not the case that the longer the extraction vent, the smaller the critical exhaust volumetric flow rate. There exists a critical extraction vent length that is 0.1 m in the current study. Finally, an empirical equation was developed to predict the critical exhaust volumetric flow rate based on theoretical analysis. The coefficients in the equation were determined by experimental data. Compared with experimental data, it is obvious that the derived equation can well predict the critical exhaust volumetric flow rate. Research outcomes can provide some helpful references for the design of point extraction ventilation in the tunnel fire.
{"title":"Effect of Extraction Vent Length on Critical Exhaust Volumetric Flow Rate in Long-distance Subway Tunnel Fires with Two-point Extraction Ventilation","authors":"Peng Zhao, Zhongyuan Yuan, Nanyang Yu","doi":"10.1109/ICFSFPE48751.2019.9055802","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055802","url":null,"abstract":"In recent years, point extraction ventilation mode is considered as a competitive alternative to control the smoke in the tunnel fire. The principle of point extraction ventilation is that sufficient exhaust volumetric flow rate is supplied to confine the smoke to an acceptable zone. However, the issue of an appropriate exhaust volumetric flow rate to confine the smoke to a safe zone has not been studied sufficiently. In this study, the critical exhaust volumetric flow rate to control the smoke to the zone between two extraction vents was proposed and a series of small-scale experiments were carried out to investigate the effect of extraction vent length on the critical exhaust volumetric flow rate. The heat release rate (HRR), extraction vent length and the distance between two vents varied during the tests. Smoke temperature below the ceiling and smoke configurations were measured and analyzed. Experimental results show that it is not the case that the longer the extraction vent, the smaller the critical exhaust volumetric flow rate. There exists a critical extraction vent length that is 0.1 m in the current study. Finally, an empirical equation was developed to predict the critical exhaust volumetric flow rate based on theoretical analysis. The coefficients in the equation were determined by experimental data. Compared with experimental data, it is obvious that the derived equation can well predict the critical exhaust volumetric flow rate. Research outcomes can provide some helpful references for the design of point extraction ventilation in the tunnel fire.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"222 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73352521","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 : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055866
Zonglin Fu, Fei You, Jun-hua Han, Songtao Zhou, Kai Shui
By using the self-designed mesoscale (0.60 m × 0.25 m × 0.25 m) smoldering experimental platform, smoldering simulation tests of melamine foam (MAF) and flexible polyurethane foam (FPUF) embedded inside the chamber at different volume ratios (0.0 %-100.0 %) were carried out. Results show that as volume of MAF increases, critical smoldering temperature (CST) first increases to a maximum value of 347.6 °C at 20.0 vol% (MAF) and then decreases, showing.an average value of around 330.0 °C. Heating rate (SHR) of raw materials and char residue keeps decreasing to below 0.2°C/s when MAF volume exceeds 60.0 vol%. Smoldering propagation rate (SPR) first increases to maximum value of 5.6×10–3 cm/s at 20.0 vol% (MAF) and then decreases. As MAF volume upgrades, high temperature maintenance time (HTMT) at different positions gradually decreases with the smoldering wave propagation (B2>C2>D2>E2).
利用自行设计的中尺度(0.60 m × 0.25 m × 0.25 m)阴燃实验平台，对三聚氰胺泡沫(MAF)和柔性聚氨酯泡沫(FPUF)在不同体积比(0.0% ~ 100.0%)下埋入腔内进行了阴燃模拟试验。结果表明:随着MAF体积的增大，临界阴燃温度(CST)在20.0 vol% (MAF)时先升高到最大值347.6℃，然后下降，如图所示。平均值约为330.0°C。当MAF体积超过60.0 vol%时，原料和炭渣的升温速率(SHR)持续降低至0.2°C/s以下。在20.0 vol% (MAF)时，阴燃传播速率(SPR)先增大到最大值5.6×10-3 cm/s，然后减小。随着MAF体积的升级，不同位置的高温维持时间(HTMT)随着阴燃波的传播逐渐减小(B2>C2>D2>E2)。
{"title":"Smoldering Initiation and Propagation Characteristics of Mixed Melamine Foam and Flexible Polyurethane Foam","authors":"Zonglin Fu, Fei You, Jun-hua Han, Songtao Zhou, Kai Shui","doi":"10.1109/ICFSFPE48751.2019.9055866","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055866","url":null,"abstract":"By using the self-designed mesoscale (0.60 m × 0.25 m × 0.25 m) smoldering experimental platform, smoldering simulation tests of melamine foam (MAF) and flexible polyurethane foam (FPUF) embedded inside the chamber at different volume ratios (0.0 %-100.0 %) were carried out. Results show that as volume of MAF increases, critical smoldering temperature (CST) first increases to a maximum value of 347.6 °C at 20.0 vol% (MAF) and then decreases, showing.an average value of around 330.0 °C. Heating rate (SHR) of raw materials and char residue keeps decreasing to below 0.2°C/s when MAF volume exceeds 60.0 vol%. Smoldering propagation rate (SPR) first increases to maximum value of 5.6×10–3 cm/s at 20.0 vol% (MAF) and then decreases. As MAF volume upgrades, high temperature maintenance time (HTMT) at different positions gradually decreases with the smoldering wave propagation (B2>C2>D2>E2).","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"138 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85891715","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 : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055765
Ziyi Jiang, Wei Li, Xiumei Liu, Beibei Li, Lili Liu
Aqueous film-forming foam is used widely as a means of fire extinguishing, especially for both chemical process industry and oil industry fires. The corresponding low-expansion foam generator always uses negative pressure generated by a high-velocity jet to draw in air to create a low-expansion foam. Considering the interactions between factors, an orthogonal test was established to characterize their performance. This conclusion was verified using the method recommended in GB15308-2006, the standard issued by the Standardization Administration of the People's Republic of China. It was found that the nozzle convergence angle and the ratio of the nozzle position to the throat pipe diameter of the generator were the predominant factors. The optimal foam generator configuration had a nozzle position of 1.2 times the diameter of the throat pipe, a nozzle convergence angle of 11º and throat pipe length of 7.5 times the diameter of the throat pipe. This study contributes to the optimization of a low-expansion foam generator.
{"title":"Experimental Study of the Effects of a Low-expansion Foam Generator Structure on the Foaming Quality","authors":"Ziyi Jiang, Wei Li, Xiumei Liu, Beibei Li, Lili Liu","doi":"10.1109/ICFSFPE48751.2019.9055765","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055765","url":null,"abstract":"Aqueous film-forming foam is used widely as a means of fire extinguishing, especially for both chemical process industry and oil industry fires. The corresponding low-expansion foam generator always uses negative pressure generated by a high-velocity jet to draw in air to create a low-expansion foam. Considering the interactions between factors, an orthogonal test was established to characterize their performance. This conclusion was verified using the method recommended in GB15308-2006, the standard issued by the Standardization Administration of the People's Republic of China. It was found that the nozzle convergence angle and the ratio of the nozzle position to the throat pipe diameter of the generator were the predominant factors. The optimal foam generator configuration had a nozzle position of 1.2 times the diameter of the throat pipe, a nozzle convergence angle of 11º and throat pipe length of 7.5 times the diameter of the throat pipe. This study contributes to the optimization of a low-expansion foam generator.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"67 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86032039","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 : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055795
Ke Chen, Yanying Cheng, Hui Bai, Chunjie Mou, Yu-chun Zhang
In order to detect and alarm early fire timely and effectively, traditional temperature and smoke fire detectors are vulnerable to environmental factors such as the height of monitoring space, air velocity, dust. An image fire detection algorithm based on support vector machine is proposed by studying the features of fire in digital image. Firstly, the motion region is extracted by the inter-frame difference method and regarded as the Suspected fire area. Then, the uniform size is sampled again. Finally, the flame color moment feature and texture feature are extracted and input into the support vector machine for classification and recognition. Data sets were formed by collecting Internet resources and fire videos taken by oneself and the trained support vector machine was tested. The test results showed that the algorithm can detect early fire more accurately.
{"title":"Research on Image Fire Detection Based on Support Vector Machine","authors":"Ke Chen, Yanying Cheng, Hui Bai, Chunjie Mou, Yu-chun Zhang","doi":"10.1109/ICFSFPE48751.2019.9055795","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055795","url":null,"abstract":"In order to detect and alarm early fire timely and effectively, traditional temperature and smoke fire detectors are vulnerable to environmental factors such as the height of monitoring space, air velocity, dust. An image fire detection algorithm based on support vector machine is proposed by studying the features of fire in digital image. Firstly, the motion region is extracted by the inter-frame difference method and regarded as the Suspected fire area. Then, the uniform size is sampled again. Finally, the flame color moment feature and texture feature are extracted and input into the support vector machine for classification and recognition. Data sets were formed by collecting Internet resources and fire videos taken by oneself and the trained support vector machine was tested. The test results showed that the algorithm can detect early fire more accurately.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"3 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82418770","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}
A unified model was developed from leaked high-pressure natural gas (up to 6.55 MPa) and a procedure outlined in IEEE Standard 738–2012 for transmission line conductor temperature. A real-scale case was presented to show the thermal effects of a large-scale jet fire on the nearby transmission line by setting their distances from 200 to 500 m. The predicted total flame height and damage radius correspond to the reported results with appropriate correction of input parameters. Transmission lines with higher load currents and shorter distances to the jet fire induce higher temperature rises in line conductors. Reducing the current load of transmission line needs to integrate both factors of thermal failure of transmission line and economy of power system.
{"title":"Temperature Evolution Properties of Overhead Line Conductor Exposed to Large-scale Jet Fires Induced by High-pressure Natural Gas Leakage","authors":"Zhenhua Wang, Fei You, Juncheng Jiang, Yun Zhang, Kai Shui, Jixiang Xu, Zonglin Fu, Wenhao Huangfu","doi":"10.1109/ICFSFPE48751.2019.9055856","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055856","url":null,"abstract":"A unified model was developed from leaked high-pressure natural gas (up to 6.55 MPa) and a procedure outlined in IEEE Standard 738–2012 for transmission line conductor temperature. A real-scale case was presented to show the thermal effects of a large-scale jet fire on the nearby transmission line by setting their distances from 200 to 500 m. The predicted total flame height and damage radius correspond to the reported results with appropriate correction of input parameters. Transmission lines with higher load currents and shorter distances to the jet fire induce higher temperature rises in line conductors. Reducing the current load of transmission line needs to integrate both factors of thermal failure of transmission line and economy of power system.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"433 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78465737","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 : 2019-10-01DOI: 10.1109/ICFSFPE48751.2019.9055788
Lei Lei, Zhiyuan Wang, Yuan Li
For analyzing the effectiveness of fire detection alarm system in the underground pipe gallery, different types of detection alarm system (space detection and object detection) is installed in the model of L type and T type cable corridor. By changing fire source position and the environment air velocity, the writer compares the fire temperature field and smoke concentretion under different working conditions to the influence of detection alarm system effectiveness. The results show that when the corridor space structure is T-shaped, the detection system is more likely to get fire signal and alarm. When the position of the fire source changes, the fire source energy at the corner of the L-shaped tunnel is first monitored by the cable-type linear temperature detector. In the L-type tunnel, when the wind speed increases, the time of point-type temperature detector and cable-type linear temperature detector increases, and the wind speed keeps increasing, the point-type temperature detector fails to alarm. In the T-type tunnel, the time of point-type smoke detector and cable-type linear temperature detector increases as the wind speed increases.
{"title":"Analysis on The Effectiveness of Detection and Alarm of Cable Corridor","authors":"Lei Lei, Zhiyuan Wang, Yuan Li","doi":"10.1109/ICFSFPE48751.2019.9055788","DOIUrl":"https://doi.org/10.1109/ICFSFPE48751.2019.9055788","url":null,"abstract":"For analyzing the effectiveness of fire detection alarm system in the underground pipe gallery, different types of detection alarm system (space detection and object detection) is installed in the model of L type and T type cable corridor. By changing fire source position and the environment air velocity, the writer compares the fire temperature field and smoke concentretion under different working conditions to the influence of detection alarm system effectiveness. The results show that when the corridor space structure is T-shaped, the detection system is more likely to get fire signal and alarm. When the position of the fire source changes, the fire source energy at the corner of the L-shaped tunnel is first monitored by the cable-type linear temperature detector. In the L-type tunnel, when the wind speed increases, the time of point-type temperature detector and cable-type linear temperature detector increases, and the wind speed keeps increasing, the point-type temperature detector fails to alarm. In the T-type tunnel, the time of point-type smoke detector and cable-type linear temperature detector increases as the wind speed increases.","PeriodicalId":6687,"journal":{"name":"2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)","volume":"5 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78485598","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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