터널 물분무소화설비의 살수밀도분포에 대한 실험연구

소수현,박경환,So, Soo-Hyun,Park, Kyung-Hwan 한국터널지하공간학회 2011 한국터널지하공간학회논문집 Vol.13 No.1

장대 도로터널 및 위험도가 높은 도로터널에 설치되고 있는 물분무소화설비는 성능과 관계된 단위면적당 방수밀도에 대한 검증과정이 없이 사용되어 왔다. 본 연구는 도로터널에 물분무소화설비에 노즐을 설치하여 기준압력에서 방수시험을 실시하여 기준을 만족하는지 여부를 확인하였다. 결론적으로 모든 노즐이 기준을 만족하지 못하였다. 이런 결과는 도로터널용 물분무노즐을 검증하는 시험기준이 없고, 실제 시험을 통한 검증 과정이 존재하지 않았기 때문이라고 판단된다. 따라서 물분무노즐의 성능을 시험할 수 있는 기준의 마련과 설치된 시설을 검증하는 제도적인 보완이 필요하다. Spray density of the water spray system which is installed in long road tunnels and hazardous vehicle tunnels is applied without proper performance assessment process. In this study, the requirements of Spray Density Guidelines at the standard pressure is investigated through spray test set up the nozzle of a water spray system in a simulated road tunnel. The results showed that all the nozzles used in the test area did not meet the requirements of the Guidelines. The absence of performance test codes and inspection process on the nozzle at real scale in tunnels may have caused this practice. Therefore, it is suggested that the performance test regulations of the nozzle on the water spray system is established in order to properly assess the system performance.

복합 굴절차의 붐과 바스켓에 대한 구조 해석

소수현(Soo-Hyun So),강성수(Sung-Soo Kang) 한국생산제조학회 2012 한국생산제조학회지 Vol.21 No.6

In this study, some structural analysis using 3D CAD data, material properties, load conditions and boundary conditions are carried out to evaluate structural stability of the multi-aerial platform for high-rise fire fighting and rescue. We conduct structural analysis for the upper structures such as turn table, booms and basket, by using a universal structural analysis program NASTRAN. As the results, there is local stress exceeding the yield strength, but it is able to relax stress concentration in a way such as changing thickness of the structure or making larger inertia moment in cross section of booms.

가스계 소화시스템용 소화약제 저장용기 누설 검출 무선 시스템 개발

소수현(So, Soo-Hyun),오주환(Oh, Ju-Hwan),차철웅(Cha, Cheol-Woong),이대근(Lee, Dae-Kuen) 한국화재소방학회 2008 한국화재소방학회 학술대회 논문집 Vol.2008 No.추계

In our study, Monitoring RF System in real-time on leakage of gas cylinder is developed. The system is consisted of Pressure Transmitting part, Main Controller and Operating program. The pressure data of gas cylinder are transmitted to the modem of main controller part by RF module of Pressure Transmitting part and the data received through the modem are recorded in real-time and showed the situation of gas cylinder on the PC monitor. Through the test on the case of the artificial pressure-reduction, the detecting performance. of the developed system is conformed.

과하중 상태에 있는 복합 굴절차의 구조 해석

소수현(Soo-Hyun So),강성수(Sung-Soo Kang) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.6

The development of high-rise firefighting vehicles warrants thorough structural analysis for ensuring vehicle stability. A few structural analyses were carried out using CAD data, material properties, load conditions, and boundary conditions for evaluating the structural stability of an overloaded multi-aerial platform for firefighting and rescue. Structural analysis was performed with an analytical model consisting of a turntable, six booms, two jib booms, and a basket structure. This model was operated in eight modes. All simulation was performed using NASTRAN, a commercial code. As a result, we confirm that the position of local stress exceeds that of the yield strength. Therefore, stress concentration relaxation is possible by introducing reinforcing boom structures, changing the shape, or imparting a larger moment of inertia to the booms’ cross sections.

과하중을 고려한 복합 굴절차의 구조 해석

소수현(Soo-Hyun So),강성수(Sung-Soo Kang) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.4

입경과 표면 소수성이 조절된 미세분말활성탄의 수중 녹조 기인 이취미 물질 제거 특성

소수현(So, Soo Hyun),채아나(Chae, A Na),조강우(Cho, Kang Woo),송경근(Song, Kyung Guen) 대한토목학회 2017 대한토목학회 학술대회 Vol.2017 No.10

9 볼트 사각 전지의 단락사고 발생 시 화재 위험성 고찰

하헌우,소수현,이운근,공하성,Ha. Hun Woo,So. Soo Hyun,Lee. Un Kun,Kong. Ha Sung 한국방재학회 2012 한국방재학회논문집 Vol.12 No.6

본 연구에서는 도체와의 접촉에 의해 단락 가능성이 높은 9 V 1차 전지와 2차 전지의 화재 발생 위험성을 실험적으로 살펴보았다. 실험을 위하여 일상생활에서 1차 및 2차 9 V 전지와 함께 방치 되었을 경우 단락 가능성이 높은 도체들을 시료로 선택하였고, 9V 전지와 시료가 단락되는 조건에서 시료에 1회용 종이 티슈를 접촉시켜 발화의 가능성을 실험하였다. 전지와 도체의 단락에 의해 화재가 발생하는 결과를 고찰하기 위해 이론적 저항 값을 도출하여 실험 결과와 이론적 저항 값의 상관관계를 분석하였다. 결과적으로 도체 시료 중 단면적이 적고 코일형으로 되어 있는 볼펜 스프링의 경우가 종이 티슈를 발화되었으며, 볼펜스프링과 같은 조건에서는 단락 시 열의 집중이 일어나기 용이하여 발화가 발생되는 것을 실험적으로 증명하였다. In this study, the riskiness of fire accidents on 9 V primary battery and secondary battery was investigated experimentally, their batteries were likely to occur the short circuit with a conductor contact. For this experiment, conductors of which short circuit are probable if they are left with 9 V batteries were selected as samples. And the possibility of a fire was experimented by bringing samples in contact with tissue paper, assuming that the 9 V battery and a sample have in short circuit. To consider a fire accident by the short circuit of a battery and a conductor, the theoretical resistance was calculated and the correlation between the experimental results and the theoretical resistance was studied. As a result, the sample(ball point pen`s spring) of which length was the longest, cross-section was small and shape had a rolled like a coil was caught a fire. It is proved experimentally so the ball point pen`s spring was likely to occur the concentration of heat that it was caught a fire.

터널화재시 물분무소화설비의 성능에 대한 실대시험

박경환,소수현,Park, Kyung-Hwan,So, Soo-Hyun 한국터널지하공간학회 2010 한국터널지하공간학회논문집 Vol.12 No.4

터널화재 시 위험을 경감시키기 위해 설치하는 물분무설비의 성능을 실대 시험을 통해 확인하였다. A급 화재, Pool 화재 및 차량화재시 물분무노즐은 뜨거운 연기의 온도를 낮추는데 효과가 큰 것으로 확인되었다. 또한 터널에 기류가 존재하는 경우에도 냉각효과가 큰 것으로 확인되었다. 이 결과를 통해 물분무설비는 터널화재 시 기류온도를 낮춤으로써 fire jump를 방지하고, 주위의 시설물을 보호할 수 있을 것으로 판단된다. The performance of water spray system installed to reduce risks of tunnel fire is investigated by a real tunnel fire test. In case of A class fire, Pool fire, and car fire, the nozzle of water spray has had a marvelous effect to reduce the temperature of hot smoke. And it is verified to have remarkable cooling effects when there is the air flow in a tunnel. Though this results, water spray system will be able to prevent a fire jump to decrease the air temperature in a tunnel and to protect tunnel facilities by the fire control.

소방공무원의 개인, 직무 및 건강관리 특성이 근골격계질환과 직무스트레스에 미치는 영향 조사

하강훈,소수현,이경선,Ha, Kang Hun,So, Soo-Hyun,Lee, Kyung-Sun 한국안전학회 2017 한국안전학회지 Vol.32 No.4

The purpose of this study is to analyze the effects of personal, job, and health care characteristics of firefighters on musculoskeletal disorders (MSDs) and job stress. This survey was participated 591 firefighters in jeonnam and Busan city. The survey consisted of 1) personal, job, and health care characteristics measurement, 2) job stress measurement (KOSS, Korean Occupational Stress Scale), 3) musculoskeletal disorders symptoms mesurement. The analysis of the data was using SAS 9.1 Ver. The statistics analysis was performed the frequency, percentage, average, and standard deviation for each survey item. The Chi square analysis was performed to analyzed the effects of personal, job, and health care characteristics on MSDs and job stress. According to the results of the study on musculoskeletal disorders symptoms, 49.6% of the subjects perceived pain related to musculoskeletal diseases. The total score for job stress was 51.6 (SD 12.9), which was the highest 50% when compared to the Korean job stress standard (male). Age, department, work experience, working type, position, and sleeping time were found to affect musculoskeletal disorders and job stress.

소방차용 포 소화설비의 성능향상을 위한 펌프 푸로포셔너의 자동 정량 혼합특성에 관한 연구

구재현,소수현,Ku,Jae-Hyun,So,Soo-Hyun 한국방재학회 2011 한국방재학회논문집 Vol.11 No.4

본 연구에서 물 유동 내 포 소화약제를 일정한 농도로 정확하게 혼합하는 소방차용 포 소화설비의 펌프 푸로포셔너 성능향상을 위하여 포소화약제의 자동 정량 혼합특성을 분석하였다. 펌프, 탱크, 제어기, 포 소화약제 제어 밸브, 압력계, 유량계, 노즐로 구성되는 성능평가 시스템을 사용하여 개발된 펌프 푸로포셔너의 성능을 실험적으로 평가하였다. 결과적으로 펌프 푸로포셔너의 포 소화약제 혼합성능은 벤츄리 효과에 의한 물 유량 증가와 입구압력 증가에 따라 증가하고 오차율 +0.15이내의 범위에서 물 유량과 포소화약제 양의 혼합농도 3%와 6%의 성능을 보였다. 따라서, 소방차용으로 개발된 포 소화설비의 펌프 푸로포셔너는 양호한 자동 정량 혼합성능을 보여 주었다. This study describes to analyze automatic foam mixing characteristics in steady state in order to enhance the performance of pump proportioners of foam system for a fire truck, which is designed to mix accurately a foam liquid concentrate into a water stream up to constant concentration. The developed pump proportioner is experimentally evaluated on performance evaluation system consisted of a pump, tanks, a controller, a foam control valve, pressure gauges, flow meters and a nozzle. As a result, the foam mixing performance of the pump proportioner is found to improve with increased the water flow rate due to the venturi effect and with increased the inlet pressure of a pump proportioner and is analysed with 3% and 6% in the error rate of <TEX>${\pm}5%$</TEX>. Therefore, the pump proportioner system developed for fire trucks showed good performance for automatic foam mixing of foam systems in steady state.