화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.11, No.7, 800-806, November, 2000
Export Citation
가압 염소포화액체 저장탱크의 2상흐름 누출에 따른 유해 위험거리 및 누출 시간과 흡입용량 예측을 위한 모델링 방법론
Modeling Methodology for Prediction of Hazard Distance, Release Time and Dose for Two-phase Flow Release from the Pressurized Saturated Chlorine Liquid Storage Tank
김종식†, 박종규
  • 계명대학교 화학공학과, 대구 704-701
Jong Shik Kim†, and Jong Kyu Park
  • Department of Chemical Engineering, Keimyung University, Taegu 704-701, Korea
E-mail:
초록
염소가스의 풍하 거리에 따른 1h 평균 최대 지표면 농도를 산출하여 유해위험성 평가에 사용되는 미국의 법적 규제 농도인 TLV-TWA(Threshold Limit Values-Time Weighted Average), IDLH(Immediately Dangerous to Life or Health) 농도에 대한 염소가스의 풍하 거리에 따른 유해위험거리(LOC-Level of Concern), 총 누출시간(Strength), 분당 누출량 및 흡입용량(Dose)을 바람의 속도 변화와 온도 변화에 따라 모델링 실험하였다. 모델링 실험결과 유해위험거리는 바람의 속도가 2(meter/sec)일 때 6.4 km 였으나 10 (m/sec)일 때 9 km의 결과를 보여 속도 변화에 민감하게 반응하였으며, 누출시간을 결정하는 요인은 온도로 주위의 온도가 20 ℃일 때 2 min 10 s 28 ℃, 35 ℃에서 2min의 누출시간을 나타내어 주변온도가 낮을 때 누출시간이 증가되었다. 흡입용량은 바람의 속도가 2 (meter/sec)일 때 순간 흡입용량이 1000000 ppm 이상을 나타내었으며 10 (meter/sec) 에서는 2000 ppm 정도로 나타났다. 또한 주변온도가 20 ℃일 때 200000 ppm 정도이었으나 28 ℃이상의 온도에서는 600000 ppm의 결과를 나타내어 흡입용량은 낮은 온도와 바람의 속도가 클수록 인체에 흡입되는 양이 적게 나타났다.
After calculating the density per hour of average maximum surface of the earth from the distance below-wind of chlorine has, harmful danger distance (LOC) from the distance below-wind of chlorine gas about the density was examined. This modelling experiment was carried out according to TLV-TWA (Threshold Limit Values-Time Weighted Average), IDLH (Immediately Dangerous to Life or Health: american legal restriction density used for evaluation of harmful possibility of danger), total release time (Strength), the release quantity per minute and an inhalation dosage (Dose) depending on change of the wind speed and the temperature. According to the result of modeling experiment, the harmful danger distance had the following outcomes: in case of the wind speed 2 m/sec, the distance was 6.4 Km; in case of the wind speed 10 m/sec, it was 9 Km. Thus, the harmful danger distance was sensitive to the change of the wind speed. The release time of harmful poisonous material was dependent on temperature: in case of 20 ℃, the release time was 2'10" and in the case of 28 ℃ and 35 ℃, it was 2'. Thus, the release time increased when the circumference temperature was decreased. Moment inhalation dosage, in the case of 2 m/sec wind speed, was more than 1000000 ppm. In the case of 10 m/sec wind speed, it was about 2000 ppm. In addition, in the case where the circumference temperature was 20 ℃, the dosage was about 200000 ppm but in the case of 28 ℃, it was 600000 ppm. So as the temperature was lowered and the wind speed was increased, the dosage which was inhaled to the body was decreased.
Keywords:ALOHA;Dose;IDLH;LOC
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