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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Fire Science and Engineering
Journal Basic Information
Journal DOI :
Korea Institute of Fire Science and Engineering
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Volume & Issues
Volume 18, Issue 4 - Dec 2004
Volume 18, Issue 3 - Sep 2004
Volume 18, Issue 2 - Jun 2004
Volume 18, Issue 1 - Mar 2004
Selecting the target year
Evaluation of the Closed-type Sprinkler Head Activation Time
Moon-Hak, Jee ; Sung-Yull, Hong ;
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 1~8
As a predominant active fire suppression method, closed-type sprinkler systems are used for the purpose of fire control and suppression at the nuclear power plants as well as the industrial facilities. It goes without saying that the proper selection of the system guarantees the adequate actuation of the thermal device. Consequently, the appropriate evaluation should be executed for the thermal behavior with the theoretical and empirical approach. For this purpose, the comparison of activation time for the fusible-link type sprinkler head with the simplified fire case and t-square fire growth case was evaluated. At this paper, the comparison output was presented with the tendency of thermal behavior. In addition, we issued some technical comments for the most appropriate equation in case of the estimation of the sprinkler head activation time. We also raised some idea that should be incorporated for the usage of the t-square equation for the realistic application in the field of the performance-base fire protection approach.
Verification and Revision of Empirical Equation for Physical Properties of Inert Gases
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 9~17
The values of physical properties of the inert gases of Ar,
were calculated by the empirical equations. The regression coefficients were obtained by the experimental data and the resulting calculated values. For the empirical equation with a lower regression coefficient, a new correlation was suggested. At an atmosphere pressure, the empirical equation was confirmed by the experimental values for the viscosity, density, saturated pressure, and surface tension of Ar,
. The correlation coefficients of the empirical equations proposed in this work was higher than 0.99.
Development of Using Technique of Impregnating Alkalization Agent to Recover Durability of Carbonated Reinforcement Concrete Structures by Fire Damages
Moo-Han, Kim ; Yong-Ro, Kim ; Jea-Bong, Jang ;
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 18~24
Fire breaking out in carbonated reinforcement concrete structures considerably deteriorates the durability of them by propelling carbonation. However, the research and technical development to recover the durability is still in an underdeveloping stage in Korea. Therefore, this research aims to understanding the deteriorated durability of a carbonated structure, evaluating the performance of an impregnating alkalization agent to recover the durability and developing a way of using it.
A Study on the Recognition of Daegu Citizen on Fire Safety
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 25~29
The purpose of this study is to supply basis data that can improve the recognition of Daegu citizens on fire safety through the investigation of their recognition on fire safety. To achieve the purpose, 553 Daegu citizens in Daegu city were interviewed from Oct. 2 to 15, 2003. The results of this study are as follows; Citizens had thought little the recognition of our society on fire safety and Daegu subway fire accident caused very big effect in citizens' fire safety recognition. Citizens did not trust about fire fighting facilities that is established in the building. Method to elevate recognition for citizens' fire safety recognition appeared by TV, newspaper, etc public information reinforcement (30.7%), establishment and operation of the fire safety experience center (24.6%), fire safety education reinforcement in school (20.8%).
A Study on the Prediction of Flashover Time and Heat Release Rate(HRR) for Building Interior Materials
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 30~38
An important characteristics during fire growth is the phenomena of flashover, which is the transition from the local combustion to the full-room fire. The aim of this study is to predict the flashover times, the ignition times and HRR(heat release rate) of flashover for building interior materials. By using the literature data and RSM(response surface methodology), the new equations for predicting the flashover time, the ignition time and the HRR of building interior materials are proposed. The A.A.P.E.(average absolute percent error) and the A.A.D.(average absolute deviation) of the reported and the calculated flashover times were 38.74sec and 51.24sec respectively, and the correlation coefficient was 0.975. The A.A.P.E and the A.A.D of the reported and the calculated ignition times were 10.96sec and 1.97sec, and the correlation coefficient was 0.962. Also the A.A.P.E and the A.A.D. of the reported and the calculated the HRR of flashover by means of times were 29.92 and 514, and the correlation coefficient was 0.830. The values calculated by the proposed equations were in good agreement with the literature data. Therefore, it is expected that this proposed equations will support the use of the research for other building interior materials.
A Study on the Characteristics of Pool Fire
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 39~44
This study is intended to understand flame behavior of the pool fire. Liquid fuels were acetone, methanol, hexane and heptane which are used in many industries. Diameter of vessel was varied from 50 mm to 400 mm and the vessel was made by stainless steel and copper. Combustion time, temperature of vessel wall and heat flux of flame were measured, and flame behavior was visualized with video camera. Based on the experiment, it was found that the burning velocity and flame height was increased according to increase of vessel diameter, and vortex shedding frequency was inverse proportion to vessel diameter. And the characteristics of pool fire were affected by physical and chemical properties of liquid fuel and the vessel materials.
Evaluation of Thermal Aging on PVC Using Thermo Gravimetry Analysis and Accelerated Thermal Aging Test
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 45~50
Thermal degradation of PVC which used for insulator of 600V vinyl insulated wire has been studied by thermo gravimetry analysis and accelerated thermal aging test. The activation energy using thermo gravimetry analysis was determined by the kinetic methods, such as Kissinger and Flynn-Wall-Ozawa. The activation energy was determined to from 89.29 kJ/mol to 111.39 kJ/mol in 600V PVC insulated wire and from 97.80 kJ/mol to 119.25 kJ/mol in 600v heat-resistant PVC insulated wire. And also, the activation energy through a long-term thermal aging test was calculated by using Arrhenius equation In the low temperature of 8
. The results showed that 600V PVC insulated wire was 92.16 kJ/mol, and 600v heat-resistant PVC insulated wire was 97.52 kJ/mol. Consequently, the activation energy of 600V heat-resistant PVC insulated wire is larger than 600V PVC insulated wire. Therefore, it can be predicted that 600V heat-resistant PVC insulated wire has a long-term stability relatively.
An Experimental Study for Supposed Heating Temperature of Deteriorated Concrete Structure by fire Accident
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 51~56
A fire outbreak in a reinforcement concrete structure looses the organism by the different contraction and expansion of hardened cement pastes and aggregate, and causes cracks by thermal stress, leading to the deterioration of the durability. So concrete reinforcement structure is damaged partial or whole structure system. Therefore diagnosis of deterioration is needed based on mechanism of fire deterioration in general concrete structures. Fundamental information and data on the properties of concrete exposed to high temperature are necessary for accurate diagnosis of deterioration. In this study, it was presented data for the accurate diagnosis and selection of repair and reinforcement system for the deteriorated concrete heated highly, various concrete such as standard design compressive strength, fine aggregate and admixture were exposed to a high temperature environment. And fundamental data were measured engineering properties such as explosive spatting, ultrasonic pulse velocity and compressive strength.
Study on the Fire Safety Estimation for a Pilot LNG Storage Tank
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 57~73
Quantitative safety analysis through a fault tree method has been conducted for a fire broken out over the spilling LNG from a pilot LNG tank, which may have 4 types of scenarios causing potentially risky results. When we consider LNG release from venting pipelines as a first event, any specific radius of Low Flammable Limit(LFL) has not been built up. The second case of LNG outflow from the rupture of storage tank which will be the severest has been analyzed and the results revealed various diffusion areas to the leaking times even with the same amount of LNG release. As a third case LNG leakage from the inlet/outlet pipelines was taken into consider. The results showed no significant differences of LFL radii between the two spilling times of 10 and 60 minutes. Hence, we have known the most affecting factor on the third scenario is an initial amount of LNG release. Finally, the extent of LFL was calculated when LNG pipelines around the dike area were damaged. In addition, consequence analysis has been also performed to acquire the heat radiation and flame magnitude for each case.
A Study on Fire Data Analysis in Korea, Japan and USA (1) Number of Fires and Fire Trends
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 74~94
Fire trends in Korea, Japan, and the United States were analyzed in this paper. The number of fires in the U.S. tends to decrease greatly from 3,264,500 cases in 1977 to 1,687,500 in 2002. There have been an estimated 60,000 fires annually more than 20 years in Japan, at the peak of 73,072 cases in 1973. In case of Korea, 5438 fires occurred in 1980. However, fires increased rapidly up to 36,169 cases in 2001 and 31,372 cases in 2003. In addition, fire statistics processing methods and fire statistics reports were analyzed. The result was that Korea was behind most of the three countries. Therefore I confirmed that we need not only to study systematical processing methods of fire statistics in order to get confidence on those like accurate estimating fire data analysis, but also to publish variable and specific reports on fires for the purpose of analyzing fire data.
A Study on the Effect of Compressed Air Using Air-breathing Upon Human
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 95~102
This paper has analyzed compressed air-breathing that fire fighters use in Korea. And the local and the foreign standards for compressed air have been compared. Through the survey, it has been found that over 75% of all the respondents have ever had simple abnormal symptoms after wearing air respirators, and among the abnormal symptoms, nausea and headache are most frequent. Maintenance and exchange of compressor filters were poor and it can be another cause of abnormal symptom of fire fighters. Korea does'nt have any particular standards for compressed air-breathing, and the compressed air that is used by fire fighters is not different from air for industrial use. However, advanced countries like Europe, Canada and America, they have special standards for compressed air-breathing that fire fighters use. Through the analysis of components of the compressed air used in Korea, it has been found that all the samples have more water than the international standards.
A Study on Dynamic Characteristics of EFPCD for Conductor Breaks in Low Voltage Wiring
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 103~107
Recently. the spark and the overheat due to in the conductor breaks have been the major causes of electrical fire in low voltage wiring. Also, because in these cases the current is a surge one, the losses and faults of a communication, a home appliances, a computer and a measuring instrument may occur. Especially, in such cases, we are very difficult to detect the condition of the conductor breaks. In this paper, we have developed an auxiliary control device, the electrical fire prevention control device (EFPCD), of an earth leakage breaker (ELB). And we can prevent the electrical fire caused by the spark and the overheat occurring in the conductor breaks with the EFPCD.
A Study on Influential Factors of Egress Behavior in Respect of the Fire Prevention Manager in the Large-scale Shopping Mall
Fire Science and Engineering, volume 18, issue 3, 2004, Pages 108~113
Emergency response of fire prevention manager has an effect on decisive emergency exit behavior of customer who is not accustomed to emergency response in a large-scale shopping department on fire. Especially enclosed stairways in a large scale store are usually located in back space where is impossible for customer to access. Therefore, speedy emergency exit inducement by fire prevention manager is needed for the customer's safe egress. The object of study is to analyse the factors affecting egress behavior and emergency response of fire prevention manager in respect of fire prevention management.