A Study on the Method for Releasing the Internal Pressure of the Propane Cylinder caused by Liquid Expansion

액팽창을 고려한 프로판용기의 내압 해소방안에 대한 연구

  • Received : 2015.08.25
  • Accepted : 2015.10.23
  • Published : 2015.10.30


Liquefied petroleum gas can be charged up to 85% of cylinder volume by enforcement regulations of safety control and business of liquefied petroleum gas act. The charged mass by enforcement regulations is considered by liquid expansion of internal liquefied petroleum gas at $65^{\circ}C$. But the temperature of liquid would not be suspended under $65^{\circ}C$ in a cylinder or portable vessel at certain situation. In the thermodynamics view point, the cylinder can be exposed to high pressure by liquid expansion. Consequently, it can be possible to potential risk such as physical explosion. Hence, this paper will offer a method of estimated internal pressure by liquid expansion at critical state in the closed system. Also, the structural factor which is given rise to volume increasement of cylinder is offered by experiment. This paper is expected as crucial reference for a cylinder design of liquefied petroleum gas.


liquid expansion;liquefied petroleum gas;cylinder


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