Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (10): 189-193.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Mechanism and Consequence Assessment for BLEVE of Liquefied NaturaI Gas

Ma Xiao-qian  Wang Jing-jing   

  1. School of Electric Power , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2007-03-01 Online:2007-10-25 Published:2007-10-25
  • Contact: 马晓茜(1964-) ，男，教授，博士生导师，主要从事高效低污染燃烧及非线性安全问题研究. E-mail:epxqma@ scut. edu. cn
  • About author:马晓茜(1964-) ，男，教授，博士生导师，主要从事高效低污染燃烧及非线性安全问题研究.
  • Supported by:

    国家自然科学基金资助项目(50474034)

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Abstract:

In this paper , the van der Waals equation is used to describe the gas-liquid phase transition of superheated liquefied natural gas (LNG) , which is found to display the characteristics of cusp-type catastrophe. The results show that , when the pressure changes from O. 1 to O. 8 MPa , the corresponding unstable superheated degree is in the range of 143. 5 -150.7 K. According to the energy balance theo巧， the superheating energy increases with the temperature in the process of boiling liquid expanding vapor explosion (BLEVE) due to the failure of the tank. Moreover , the overpressure of explosion shock wave and the safety distance for people in BLEVE are estimated. The present research lays theoretical foundations for the accident prevention and consequence assessment of LNG during transportation and storage.

Key words: liquefied natural gas, boiling liquid expanding vapor explosion, cusp-type catastrophe, explosion shock wave