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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Fire Science and Engineering
Journal Basic Information
Journal DOI :
Korea Institute of Fire Science and Engineering
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Volume & Issues
Volume 16, Issue 4 - Dec 2002
Volume 16, Issue 3 - Sep 2002
Volume 16, Issue 2 - Jun 2002
Volume 16, Issue 1 - Mar 2002
Selecting the target year
A Study on the Extinguishing Performance of Water Mist with Additives
Fire Science and Engineering, volume 16, issue 1, 2002, Pages 1~7
Halogen-based fire suppressing agents have environmental problems because they cause the stratospheric ozone depletion and globe warming. Hence, fire suppression system using fine water mist became the center of interest as a substitution of halon. As a study about this, it is in progress to make the optimum droplet size by using water mist nozzles and to improve the extinguishing performance of water mist by using additives. Before this study, the extinguishing time of ethanol and n-heptane pool fire was measured with changing of water mist droplet size, flow density, discharge pressure, and fire size. In this study, on adding the additives to improve physical and chemical extinguishing performance of water mist, the extinguishing performance would evaluate and the optimum condition would find out. As a result, in case of ethanol pan 1 pool fire, the extinguishing time of the water mist by adding of 2.5 wt% NaCl and 0.3% AFFF got shorter 27% and 60% than the pure water mist. Adding of AFFF was to decrease the flame temperature by forming thin film on the fuel surface and to decrease the evaporation of n-heptane fuel. In case of NaCl, alkali salt crystals showed on the flame surface.
The Normative Structure of the National Disaster Management System
Fire Science and Engineering, volume 16, issue 1, 2002, Pages 8~17
This paper discusses the theoretical arguments regarding the structure of the national disaster management system. This paper is motivated by the criticisms that the Korean literature on the national disaster management system treats the issue in the limited context of the structural reform of the government and that in such process it confines itself to the production of very practical solutions based on partial observation on the national disaster management system of advanced countries without proper treatment of the peculiar political, socio-economic, cultural backgrounds of such countries. Therefore, this paper provides thorough theoretical review on the structural characteristics of the national disaster management system, which is pursued on the basis of the constructs of the systematic understanding of the characteristics of disaster itself as a policy subject. As a result this paper shows that the national disaster management system requires
A Study on the Efficiency Estimation of Halogen free Fire Resistance Cable
Fire Science and Engineering, volume 16, issue 1, 2002, Pages 18~23
Efficiency estimation of toxicity free resistance cable experiments were conducts to understand toxicity free fire ersistance polyolefin insulation material and smoke density characteristic and combustion gas corrosion analysis. A main cause of fire-growth and generating toxic gas when it burns, should be dealt with great care in life safety design. Similar patterned fire incidents such as, Inchon Live-Hof Pub Restaurant as, Sea-land Children Resort have proven that serious loss of lives were caused by hazardous gas generated fire resistance cable materials. In this paper, Referenced documents were ASTM E662 standard test method for specific Ds genalated by solid materials. The furnace control system shall maintain the required irradiance level under steady-state condition with the chamber door closed of 2.5
〕for 20 min. According to the results of the smoke density analysis of NFR-8 and FR-PVC the highest decomposition flaming smoke density range of NFR-8 and FR-PVC were 25.2 to 37.5 and 51.1 respectively. Nonflaming smoke density range of NFR-8 and FR-PVC were 100.4 to 112.2 and 126.5 to 398.8. Also, the fire gases was occurred carbon monoxide and decomposition than in polyolefin due to incomplete combustion of PVC which has high content of carbon in chemical compound.
A Development of Program on the Hydraulic Calculation in Sprinkler System Based on the Piping Network Analysis Method
Fire Science and Engineering, volume 16, issue 1, 2002, Pages 24~29
The purpose of this study is developing the computer program for hydraulic design sprinkler systems have performed the means for the general use of network analysis method. The computer program is based on the theoretical concepts of the related Hazen-Williams equations, a modified Bernoulli equations, and the Hardy Cross method of pipe network analysis. Looped piping calculations are solved by using either the Hardy Cross method or the other iteration methods. While the other methods are solved using simultaneous equations, the Hardy Cross method is concerned with one loop at a time using reiterative process. Due to its simplicity the Hardy Cross method will be the primary method described in this thesis. The purpose of this study is to develope hydraulic calculation program by using algorithm for network analysis method. The development of computer program for the hydraulic design of sprinkler systems will perform the means in the performance-based sprinkler system design.
Influence of the Combustion Flame on the Dielectric Strength of an Air Gap due to Fire Occurrence
Fire Science and Engineering, volume 16, issue 1, 2002, Pages 30~38
Occurring fire or burning bushes beneath overhead power lines have caused system disturbances in many countries. In this study, various tests in the simulated condition of power lines were conducted so as to investigate the reduction in insulation strength caused by combustion flame. Characteristics of the ac and dc flashover voltages in the vertical needle-plane, sphere-plane and rod-plane electrode system were investigated when the combustion flames were present near the high-voltage electrode. As the results of an experimental investigation, It was found that the average reduction characteristics of flashover voltages with the sphere-plane system, in comparison with the no-flames case, were about 1/3 times when the ac voltages were applied.
A Study on the Flame Pattern and the Electrical Properties of Electric Outlet Fired at Standby Mode
Fire Science and Engineering, volume 16, issue 1, 2002, Pages 39~44
In this paper, we analysed the flame patterns and the electrical characteristics of the electric outlet which was fired at standby mode. The carbonized patterns indicated that the flame had spread about 50 cm to 70 cm. After the combustibles on wall started to burn, the temperature went up to about
in 150 sec. The flame formed ceiling jet and spread quickly. The tracking was generated at the shortest distance between two electrodes and the resistance was about 100
As the result of analysis using metallurgical microscope, the normal part of a blade holder showed amorphous structure, but the melted part of a blade holder damaged by tracking showed dendrite structure and void evenly. When the blade holder of damaged outlet was analyzed by SEM and EDX, we found that the structure and components of the normal part were different from those of melted part.
A Study of Comparative Evaluation for High-rise Building Fire Risk by the Use of FREM
Fire Science and Engineering, volume 16, issue 1, 2002, Pages 45~50
This study set its bases needed for building fire risk analysis by examining general concept and definitions of fire risk analysis, and its access methods. Upon this basis, by using a computer program FREM, we brought the type of hazards out of the fire risk assessment applied to the typical 100 high-rise buildings in and out of this country. In this process, we also sorted out the programs arising from the application of a foreign born tool to domestic conditions. the credibility of fire separations and automatic fire protection system in a building would be the two most important things in an attempt to evaluate fire risk in high-rise buildings. In addition, it is vital for the purpose of securing fire safety in high-rise buildings that the systems should be properly installed and carefully maintained. When we try hard to study the evaluation standards to the above systems and, someday in the future, to employ them in evaluating fire risks in high-rise buildings, we can measure the risks much more precisely with less expenses than that we needed today.
A Study on Fire Safety of PASCON Cable Trough
Fire Science and Engineering, volume 16, issue 1, 2002, Pages 51~59
Manifold physical properties of PASCON cable trough were evaluated, and its suitability of domestic test for flammability of plastic materials was examined. Particularly, suitability of PASCON material was investigated through study on the legal propriety of PASCON cable trough used for highspeed rail line and on a fire safety. As results, domestic test for flammability of PASCON cable trough material(KS M3015) was similar to UL 94 flammability testing and from the test outstanding capability of PASCON cable trough material was proved. Besides, possibility of fire enlargement would be very low in case of fire in PASCON cable trough installed around train express. Also, fire safety of PASCON cable trough was shown to be credible.
A Development of Software (KFSA-I) for Fire Hazard Assessments in the Buildings
Fire Science and Engineering, volume 16, issue 1, 2002, Pages 60~65
The hazard assessment in which the potential hazard factors in the buildings are investigated and the scale of the hazard is analysed should be performed first in order to prevent personal and material damages due to building fire. In this study, the building fire hazard are assessed using 822-item checklist, for the qualitative evaluation of which the main factors are classified into 10 items, yielding 100 scale points with some weighting. It is shown that present model is applicable for the assessment model by actual assessment of existing building. Also the checklist is prepared in itemized questionnaire from easy assessment of building fire hazard. Therefore, the present model will be helpful for those working in fire prevention, who are suffering from the lack of manifest evaluation model for the fire prevention assessment so far in Korea.
An Application of the Water Mist System for Underground Utility Tunnel
Fire Science and Engineering, volume 16, issue 1, 2002, Pages 66~76
This paper includes new nozzle design, basic design factors of water mist system that minimize a thermal damage of cable causing business interruption and applying underground utility tunnel. A underground concrete structure (2.5 m(H)
25 m(D)) is constructed in order to test a nozzle performance. Under the designing fire scenario, critical thermal damage of cable sheath (
) reached within a 2 minutes with unsuppressed fire, but type 1 nozzle (SMD 470
) and type 2 nozzle (SMD 650
) control cable temperature below
. A system performance and fundamental design factors; K factor, flow rate, spray angle, size distribution, nozzle pressure, spray density are analyzed and proposed for system optimization.
A Study on the Corrosion According to Post-Forming Treatment of a Horizontal Side Wall Sprinkler Head Deflector
Fire Science and Engineering, volume 16, issue 1, 2002, Pages 77~83
The objective of this study is to propose a method to prevent the possible stress corrosion cracking of a horizontal side-wall sprinkler head deflector in the same atmosphere of ammonia gas as it regulated in the UL (Underwriters Laboratory). A corrosion test is carried out for three types of specimen according to post-forming treatment, one of which is annealing, another sand blasting and the other no treatment. The observation of the test specimens with a metal micro-scope says that the tensile residual stress is a major factor causing corrosion cracking, and that a proper heat treatment can remove or reduce the residial stress and prevent a crack from occurring even in a severe corrosive atmosphers.