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2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)最新文献

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A Study on the Sprinkler Installation Plan in the Air Conditioner Room through TRIZ Analysis 基于TRIZ分析的空调房间洒水装置方案研究
Hyun-Jung Lee, Jun-Seok Nam, Seung-Yun Kim
In the last five years, there have been a total of 1,168 fires in outdoor air conditioners, half of which 49.4% occurred in residential facilities. Since 2006, the “Regulations on Housing Construction Standards, etc.” have been revised, and the Air conditioner room that has entered the indoor space is operated without opening the louvers sufficiently in a small space, or dust and moisture accumulate in a poorly ventilated state due to loading a large amount of goods, and if the air conditioner is operated for a long time due to a heat waves, the outdoor unit overheats, increasing the risk of fire. The study investigated the cases of the sprinkler installation in the Air conditioner room by type, and analyzed the three causes of fire suppression failure of the sprinkler in the event of a fire: ignition source, combustible material, and head operation failure, and analyzed using TRIZ technique. In order not to fail to extinguish the fire, An additional head should be installed. Water radiated from Upper head cools the thermal part of Lower head when installed in combination with the Upper and lower head, and the Lower head does not work. When the upper head is operated, the lower head can also be operated, and the fire suppression effect was demonstrated through a fire test.
在过去的5年里,室外空调共发生了1168起火灾,其中一半(49.4%)发生在住宅设施。2006年以来,《房屋建筑标准规定》等修订,进入室内空间的空调机房间在狭小空间内没有充分打开百叶,或因装载大量货物而在通风不良的状态下积聚灰尘和水分,如果空调因热浪而长时间运行,室外机过热,增加火灾风险。本研究通过对空调房间喷头安装案例的分类调查,分析了发生火灾时喷头灭火失败的三个原因:点火源、可燃物、喷头操作故障,并运用TRIZ技术进行了分析。为了灭火不失败,应该安装一个额外的喷头。当上下水头组合安装时,由上水头辐射出的水冷却下水头的热力部分,下水头不工作。操作上头部时,也可操作下头部,并通过火灾试验验证灭火效果。
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引用次数: 0
Experimental Study on a Fire Causedby Diesel Particulate Filter Regeneration 柴油机微粒过滤器再生引发火灾的实验研究
Sun Jae Kim, Tae Hoon Kim, Young Soo Gong, Ki Tae Lee, Dong Gyu Lee, Hyun Won Lee, Woo Seung Woo, Jae Geun Oh
In this study, a vehicle fire caused by diesel particulate filter (DPF) regeneration in a truck was investigated and analyzed. A DPF is a filter that collects soot from the exhaust gas; when certain conditions are met, the soot collected in the DPF is burned by the high-temperature exhaust gas. This process is referred to as regeneration. During DPF regeneration, the high-temperature exhaust gas is ejected and combustibles around the exhaust outlet under the vehicle may ignite. Herein, we analyzed a case of fire that occurred in an underground parking lot in 2022. The vehicle was parked for loading, and the fire broke out approximately 6 min later. During the field investigation, traces of combustion were observed in the paper boxes stacked around the truck’s exhaust port. Thus, we conducted a DPF regeneration experiment using a vehicle similar to that which caught fire. The experimental results confirmed that the surrounding combustibles can be ignited by the high-temperature heat generated during DPF regeneration. Further analysis indicated the necessity of being aware of the risk of fire owing to DPF regeneration when vehicles are parked or stopped and combustible materials are present around the exhaust outlet.
以某载货汽车为研究对象,对柴油机微粒过滤器(DPF)再生引发的车辆火灾进行了调查和分析。DPF是一个从废气中收集烟灰的过滤器;当满足一定条件时,DPF中收集的烟尘被高温废气燃烧。这个过程被称为再生。DPF再生过程中,高温废气排出,车底排气口周围的可燃物可能被点燃。在此,我们分析了2022年发生在地下停车场的火灾案例。这辆车当时正在停车装货,大约6分钟后起火。在现场调查中,在堆放在卡车排气口周围的纸盒中观察到燃烧的痕迹。因此,我们使用与着火车辆相似的车辆进行了DPF再生实验。实验结果证实,DPF再生过程中产生的高温热量可以点燃周围的可燃物。进一步的分析表明,当车辆停放或停止并且排气口周围存在可燃材料时,必须意识到由于DPF再生而发生火灾的风险。
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引用次数: 0
Fire Characteristics of Lithium-ion Battery According to the State of Charge in an Accelerating Rate Calorimeter 加速量热计中充电状态下锂离子电池的燃烧特性
Sin-Woo Kim, Eui-Ju Lee
Recently, the interest in ecofriendly energy as an alternative to fossil fuels, which cause climate change and sea level rise, has increased. To achieve the efficient utilization of ecofriendly energy, such as a renewable energy, considerable effort has been made to use energy storage systems (ESSs) and smart grid systems. However, many safety problems, such as battery fires caused by the increase in the use of secondary batteries, significantly limit their application scope. In this study, to investigate the fire characteristics of lithium ion batteries (LIBs), the characteristics of the spontaneous exothermic reaction and thermal runaway phenomenon that occur at each temperature of an LIB battery were investigated using an accelerating rate calorimeter. The batteries used in the experiments were standard 18650 cylindrical batteries with a capacity of 2600 mAh, and they were tested at three different state-of-charge (SOC) levels: 0%, 50%, and 100%. The type of heat generated by each experimental condition was classified into four stages, and the existence and temperature rise characteristics of each stage were investigated according to the SOC. Although thermal runaway occurred at both 50% and 100% SOC, the reaction at 50% SOC did not escalate into violent explosions like the reaction observed at 100% charging. Furthermore, the activation energies for the thermal runaway observed in the experiments conducted at 50% and 100% SOC are presented.
最近,人们对替代导致气候变化和海平面上升的化石燃料的环保能源越来越感兴趣。为了实现可再生能源等环保能源的高效利用,人们在使用储能系统(ess)和智能电网系统方面做出了相当大的努力。然而,二次电池使用量的增加所引发的电池火灾等诸多安全问题,极大地限制了二次电池的应用范围。为了研究锂离子电池的燃烧特性,采用加速量热计研究了锂离子电池在不同温度下的自发放热反应特性和热失控现象。实验中使用的电池为标准的18650圆柱形电池,容量为2600毫安时,并在三种不同的充电状态(SOC)水平下进行测试:0%,50%和100%。将每个实验条件下产生的热量类型划分为4个阶段,并根据SOC研究了每个阶段的存在和温升特征。尽管在50%和100%荷电状态下都发生了热失控,但50%荷电状态下的反应并没有像100%充电时那样升级为剧烈的爆炸。此外,还给出了在50%和100%荷电状态下热失控的活化能。
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引用次数: 0
Evaluating Corrosion Resistance of Metal Materials in Fire Productsvia Saltwater Spray Test Under Various Experimental Conditions 在各种试验条件下通过盐水喷雾试验评价消防产品中金属材料的耐蚀性
Jong-Sang Kim, Yong-Taek Han
The brine concentration and salt spray time of KS D 9502, a saltwater spray test commonly used in Korea, were used to experimentally confirm the corrosion in iron, copper and stainless steel, and the degree of corrosion in fire extinguishers, automatic diffusion extinguishers, and residential automatic extinguishers. The results of the KS D 9502 brine spray test confirmed that there was little difference between iron and stainless under all test conditions, and that the results of the salt water test for copper were nearly identical to those of 5 wt% and 240 h (10 cycles). Unlike the two previous sets of conditions, the test results obtained at 5 wt% and 120 h of saltwater of the raw material showed very few visual (qualitative) and weight (quantitative) changes in corrosion, rendering these conditions unsuitable for the saltwater spray test. The saltwater spray tests in the fire extinguisher, automatic diffusion fire extinguisher, and residential automatic fire extinguisher showed that the results obtained at 5 wt% salt water and 240 h (10 cycles) and those obtained at 20 wt%, 240 h were nearly identical. These experimental studies show that the saltwater spray test of KS D 9502 is a variable in the corrosion resistance test, in which the time of the saltwater spray test is more important than the saltwater concentration.
采用韩国常用的盐水喷雾试验KS D 9502的盐水浓度和盐雾时间,实验确定了铁、铜和不锈钢的腐蚀情况,以及灭火器、自动扩散灭火器和居民用自动灭火器的腐蚀程度。KS D 9502盐水喷雾试验的结果证实,在所有测试条件下,铁和不锈钢之间的差异很小,铜的盐水试验结果与5 wt%和240 h(10个循环)的结果几乎相同。与前两组条件不同,在原料的盐水浓度为5wt %和120h时获得的测试结果显示,腐蚀的视觉(定性)和重量(定量)变化很小,因此这些条件不适合盐水喷雾试验。在灭火器、自动扩散灭火器和家用自动灭火器中进行的盐水喷雾试验表明,在5 wt%的盐水和240 h(10个循环)下得到的结果与在20 wt%的盐水和240 h下得到的结果几乎相同。这些实验研究表明,KS D 9502的盐水喷雾试验是耐蚀试验中的一个变量,其中盐水喷雾试验时间比盐水浓度更为重要。
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引用次数: 0
Correlation Between the Infection Control Organizational Culture, Infection Control Fatigue, and Burnout 感染控制组织文化、感染控制疲劳和倦怠的相关性研究
Si-Yoon Oh, In-Soo Lee
Emergency medical services (EMS) personnel play an important role in infectious disease control at the forefront of the emergency medical system. However, the increase in EMS personnel’s workload due to the prevalence of infectious diseases can negatively affect the practice of infection control. Accordingly, this study identified the infection control organizational culture, infection control fatigue, and burnout of EMS personnel and analyzed the correlation. In 2023, data on infection control organizational culture, infection control fatigue, and burnout were collected using a structured questionnaire for 104 participating EMS personnel in the Seoul metropolitan area. The findings showed that the personnel were unaware of the infection control organizational culture, and the degrees of infection control fatigue and burnout were high. The more negatively the personnel perceived the infection control organizational culture and the higher the infection control fatigue, the higher the burnout. Therefore, policies to manage EMS personnel’s infection control organizational culture, infection control fatigue, and burnout should be prepared and implemented.
紧急医疗服务(EMS)人员在传染病控制中发挥着重要作用,处于紧急医疗系统的最前沿。然而,由于传染病的流行,EMS人员的工作量增加,可能会对感染控制的实践产生负面影响。因此,本研究确定了感染控制组织文化、感染控制疲劳和EMS人员的倦怠,并分析了相关性。2023年,以首都圈104名EMS工作人员为对象,采用结构化问卷收集了感染控制组织文化、感染控制疲劳和倦怠的数据。结果表明,感染控制人员对感染控制组织文化不了解,感染控制疲劳和倦怠程度高。员工对感染控制组织文化的认知越消极,感染控制疲劳程度越高,倦怠程度越高。因此,应制定并实施EMS人员感染控制组织文化、感染控制疲劳和倦怠管理政策。
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引用次数: 0
A Study on dFMEA-based Fire Risk Assessment of Lithium-ion Secondary Battery Testing Cells 基于dfmea的锂离子二次电池测试电芯火灾风险评估研究
Jong Gu Kim, Hyeong Gi Kim
In this study, Design Failure Mode and Effects Analysis (dFMEA) was performed to evaluate the fire risk of lithium-ion secondary battery testing cells used during the research and development stage. dFMEA was used for the failure risk analysis, risk assessment, and risk priority analysis of the anode, cathode, separator, electrolyte, and cell design of the testing cell. In addition, the evaluation criteria, including severity, occurrence, and detection, was reorganized into three categories and optimized for the testing cell application. Based on the failure risk analysis, a total of 11 causes of failure were identified. In particular, explosion and thermal runaway were predicted when a nickel-cobalt-manganese (NCM)-based anode material with a high nickel content was used, the separator had a high thermal contraction rate and low tensile strength characteristics, and there were errors in the electrolyte composition optimization. This cause of failure was classified as a moderate risk with a high fire risk by the risk priority analysis. Therefore, at the research and development stage, it is critical to evaluate the mutual reactivity and preliminary physical properties of battery materials and to construct safety equipment to reduce fire damage.
本研究采用设计失效模式及影响分析(dFMEA)对研发阶段使用的锂离子二次电池测试电芯进行火灾风险评估。采用dFMEA对测试电池的阳极、阴极、分离器、电解液、电池设计进行失效风险分析、风险评估和风险优先级分析。此外,评估标准(包括严重性、发生和检测)被重新组织为三类,并针对测试单元应用程序进行了优化。基于失效风险分析,共确定了11个失效原因。特别是在使用镍含量高的镍钴锰(NCM)基阳极材料、高热收缩率和低抗拉强度特性以及电解质成分优化存在误差的情况下,预测了爆炸和热失控。通过风险优先级分析,该故障原因被归类为中度风险和高度火灾风险。因此,在研发阶段,评估电池材料的相互反应性和初步物理性能,构建安全设备以减少火灾损害至关重要。
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引用次数: 0
A Full-scale Fire Test on Electric Vehiclein an Underground Car Parks 地下停车场电动汽车全尺寸火灾试验
Yeon Je Shin, Minjae Kwon, Sungwook Kang, Joung Yoon Choi
A full-scale test was conducted to evaluate the risk of a modern battery electric vehicle (BEV) fire in an underground car park. A test rig 7,800 × 7,800 × 2,300 mm in size was built to simulate the corner segment of an underground car park. The BEV was positioned in a parking bay at a corner of the structure . The lithium-ion battery pack was heated using an electric heating sheet to activate thermal runaway inside the pack. The temperature distribution in the internal space of the test rig was measured using a thermocouple. The incident heat fluxes on neighboring cars were also estimated using heat flux gauges positioned around the test vehicle. Deflagration venting was observed instantaneously after the initial ignition of the flammable gas accumulated under the ceiling of the test rig. This phenomenon accelerated the growth of the BEV fire, resulting in an average ceiling jet temperature of 1,000 ℃ and a peak heat flux of 225 kW/m2.
为评估现代纯电动汽车(BEV)在地下停车场发生火灾的危险性,进行了全尺寸试验。搭建了一个尺寸为7800 × 7800 × 2300 mm的试验台,模拟地下停车场的角落段。纯电动汽车被安置在建筑一角的停车场里。锂离子电池组使用电加热片加热,以激活电池组内部的热失控。利用热电偶测量了试验台内部空间的温度分布。邻近车辆的入射热通量也通过放置在测试车辆周围的热通量计来估计。在试验台顶棚下积聚的可燃气体初次点火后,观察到瞬间爆燃通风。这一现象加速了BEV火灾的发展,导致平均顶棚喷射温度为1000℃,峰值热流密度为225 kW/m<sup>2</sup>
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引用次数: 0
Experimental Study on the Surface Pyrolysis Properties and Modeling of Expanded Polystyrene 膨胀聚苯乙烯表面热解特性及模拟实验研究
Yejin Ha, Joonho Jeon
Insulation materials are widely used in buildings for energy conservation. However, a combustible insulation material poses a potential risk of rapid flame propagation in the event of a fire. Since ignition occurs through surface pyrolysis before combustion takes place, it is important to understand the pyrolysis process of insulation materials. In this study, thermogravimetric analysis (TGA) was conducted at different heating rates to investigate the pyrolysis of expanded polystyrene (EPS). The results indicate that the pyrolysis of EPS occurs in one stage, with weight loss occurring at temperatures in the range of 370–430 ℃. The pyrolysis kinetics were analyzed using the model-free and model-free method based on TGA results. Kinetic analysis allowed for the determination of pyrolysis parameters such as activation energy, pre-exponential factor, and reaction mechanism of EPS. Furthermore, the suitability of the pyrolysis parameters obtained in this study was examined using a pyrolysis model for fire simulation.
保温材料被广泛应用于建筑中,以节约能源。然而,可燃绝缘材料在发生火灾时具有火焰快速传播的潜在危险。由于在燃烧之前,保温材料的着火是通过表面热解发生的,因此了解保温材料的热解过程非常重要。本研究采用热重分析法(TGA)研究了不同升温速率下膨胀聚苯乙烯(EPS)的热解过程。结果表明:EPS的热解过程为一个阶段,失重发生在370 ~ 430℃范围内;基于TGA结果,采用无模型法和无模型法对热解动力学进行了分析。通过动力学分析,确定了活化能、指前因子、EPS反应机理等热解参数。此外,利用热解模型进行火灾模拟,验证了研究所得热解参数的适用性。
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引用次数: 0
An Analysis of Related Laws and Literatures to Identify Fire Risk Factors for Factories in Industrial Complexes 工业园区工厂火灾危险因素识别的相关法律与文献分析
Euy-Hong Hwang, Oh-Sang Kweon
Owing to recent factory fires in industrial complexes, fire safety measures are being prepared nationally. Accordingly, this study conducted an analysis of related laws and literatures to identify fire risk factors for factories in industrial complexes as part of the development of fire prediction, control, and response technologies. Through this, the definition and classification system for industrial complexes, application of fire safety measures, fire risk factor identification methods and processes, and fire characteristics and protection measures for factories in industrial complexes were examined. The review results confirmed that the buildings corresponding to factories in industrial complexes were large, and the facilities were of Type 3. Based on this, the scale and scope of buildings located in fire risk blind spots in factories within industrial complexes were set to be less than 5,000 m2 in total floor area and no more than 10 stories (less than 33 m in height). In addition, in & exterior of protection and risk (IEPR) analysis using strengths, weaknesses, opportunities, threats (SWOT) analysis was proposed to select fire risk factors for factories in industrial complexes. In conclusion, the following four fire risk factor selection models were proposed through matrix creation: fire risk, life safety, fire spread, and fire protection.
由于最近发生了工业园区工厂火灾,全国正在准备消防安全措施。因此,本研究对相关规律和文献进行分析,以识别工业园区工厂的火灾危险因素,作为火灾预测、控制和响应技术发展的一部分。通过对工业园区的定义和分类体系、消防安全措施的应用、火灾危险因素识别方法和过程、工业园区工厂的火灾特征和防护措施进行了研究。评价结果表明,工业园区内工厂对应的建筑物规模较大,属于3类设施。据此,将工业园区内工厂火灾危险盲区建筑物的规模和范围限定在5000平方米以下。总建筑面积不超过10层(高度不超过33米)。此外,在&运用SWOT分析法,提出了工业综合体工厂火灾风险因素的外部保护与风险分析方法。综上所述,通过矩阵创建提出了火灾风险因素选择模型:火灾风险模型、生命安全模型、火灾蔓延模型和火灾防护模型。
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引用次数: 0
Evaluation of Behavioral Characteristics of the Fire Resistant Paint by Exposure Temperature 用暴露温度评价耐火涂料的性能
Hyun Kang, Heung Youl Kim, Oh Sang Kweon
In Korea, industrial complexes for manufacturing and producing various products have been established in the region. Owing to their rapid development and ease of management, most industrial complexes are composed of steel-structured buildings, and only few buildings are reinforced concrete structures. Steel-structure buildings are generally known to have relatively low fire resistance depending on their material characteristics, which necessitates additional fire resistance reinforcement procedures to ensure structural safety. In this study, we experimentally evaluated the behavioral characteristics according to the exposure temperature of intumescent paint, which is a fire-resistant reinforcement material applied in various steel structures (including industrial complexes), to use it as a database for the diagnostic evaluation of fire-damaged steel structures.
韩国在该地区建立了制造和生产各种产品的工业园区。由于工业综合体的快速发展和易于管理,大多数工业综合体由钢结构建筑组成,只有少数建筑是钢筋混凝土结构。众所周知,钢结构建筑因其材料特性而具有相对较低的耐火性能,因此需要额外的耐火加固程序以确保结构安全。膨胀涂料是一种应用于各种钢结构(包括工业综合体)的耐火加固材料,本研究通过实验对其暴露温度的行为特性进行了评价,并将其作为火灾损伤钢结构诊断评价的数据库。
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引用次数: 0
期刊
2019 9th International Conference on Fire Science and Fire Protection Engineering (ICFSFPE)
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