한국가스학회지 (Journal of the Korean Institute of Gas)

  • 제28권1호
  • /
  • Pages.19-26
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  • 2024
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  • 1226-8402(pISSN)
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  • 2713-6922(eISSN)
한국가스학회 (The Korean Institute of GAS)
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수소 폭발위험범위에 대한 IEC기준과 시뮬레이션 결과의 비교분석

Comparative Analysis of IEC Standard and Simulation Results for Hydrogen Hazardous Distance

  • 안승효 (전남대학교 화학공학과) ;
  • 김은희 (전남대학교 화학공학과) ;
  • 이선희 (전남대학교 화학공학과) ;
  • 마병철 (전남대학교 화학공학과)
  • Seung-Hyo An (Dept. of Chemical Engineering, Cheonnam National University) ;
  • Eun-Hee Kim (Dept. of Chemical Engineering, Cheonnam National University) ;
  • Seon-Hee Lee (Dept. of Chemical Engineering, Cheonnam National University) ;
  • Byung-Chol Ma (Dept. of Chemical Engineering, Cheonnam National University)
  • 투고 : 2023.09.05
  • 심사 : 2024.01.18
  • 발행 : 2024.03.31
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초록

수소 등 인화성 가스를 취급하는 사업장은 KS C IEC 60079-10-1 기준에 따라 취급시설 주변을 폭발위험장소로 구분하여 관리하여야 한다. 그렇지만 동 기준은 가스의 종류, 실내·외 여부, 대기조건 등의 구분없이 누출특성값을 기준으로 폭발위험범위를 산정하므로 실효성 등에 대한 의문이 제기되고 있다. 본 연구에서는 수소를 대상으로 누출특성과 실외대기 조건에서 시뮬레이션(PHAST 및 HyRAM)을 통해 폭발위험범위를 도출하고 IEC 기준의 log-log 그래프에서 비교하였으며, 각 결과에 대한 회귀분석을 수행하였다. 그 결과, 각 조건에서 시뮬레이션 결과가 IEC 기준보다 0.6~3.8배 이상 적게 나타났으며, 동일한 누출특성값에서 풍속 및 대기안정도에 따라 폭발위험범위가 상이한 것을 확인할 수 있었다. 또한, 간편하게 사용할 수 있는 누출특성과 폭발위험범위에 대한 선형회귀식을 도출하였다. 따라서, 수소 취급 사업장 등에서 폭발위험범위 산정 시 본 연구에서 제시한 그래프와 선형회귀식을 통하여 IEC 기준과 시뮬레이션 결과를 용이하게 비교 및 활용할 수 있을 것으로 판단된다. 이를 적용할 경우 합리적인 폭발위험장소 구분이 가능하여 경제적인 부담을 최소화할 수 있을 것으로 기대되며, 수소 폭발 등의 위험성을 크게 감소시킬 수 있을 것으로 전망한다.

In workplaces handling flammable gas such as hydrogen, hazardous area is determined through KS C IEC 60079-10-1 standard. Because this standard determines the hazardous distance based on the release characteristic regardless of the type of gas, indoor/outdoor conditions, and atmospheric conditions, concerns are being raised about the effectiveness. In this study, simulations (PHAST, HyRAM) were performed to calculate the hazardous distance for hydrogen under various release characteristics and atmospheric conditions, and compared these results to IEC standard log-log graph. Also, we performed regression analysis according to each result. we found that the simulation results were 0.6 to 3.8 times less than the IEC standard, presented convenient linear regression equations. In addition, We confirmed that the results of hazardous distance varied based on wind velocity and atmospheric stability at the same release characteristic. In addition, we derived linear regression equations for release characteristics and hazardous distance that can be conveniently utilized. So, when classifying hazardous area in workplaces where they handle the hydrogen, the integrated graph and linear regression equation are helpful for confirming the hazardous area. Moreover, it is expected that the economic burden will be minimized by being able to classify reasonable hazardous area and to greatly reduce the risk of hydrogen explosion.

키워드

과제정보

이 연구는 2023년도 환경부(한국화학물질관리협회)의 재원으로 화학물질 안전관리 특성화대학원 사업의 지원을 받아 수행된 연구입니다.

참고문헌

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