Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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A Study on the Hazard of Converted Gas for Surface Heating Treatment

표면열처리용 변성가스의 위험성에 관한 연구

  • Choi Jae-Wook (Department of Safety Engineering, Pukyong National University) ;
  • Min Wong-Chul (Department of Safety Engineering, Pukyong National University) ;
  • Lim Woo-Sub (Department of Safety Engineering, Pukyong National University) ;
  • Lee Byoung-Chul (Dept. of Maintenance, Hyundai Motor Company) ;
  • Kim Dong-Kyu (Dept. of Account, Samcheok National University)
  • Published : 2005.09.01
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Abstract

To estimate the explosion characteristics of converted gas, the study was examined into effects of altering oxygen concentration and adding hydrogen. From the result of the experiment, as the concentration of converted gas and hydrogen were increased at $21\%$ oxygen concentration, the lower explosion limit was low. Minimum explosion oxygen concentration was $6\%$. Maximum explosion pressure of converted gas was $4.61 kg_f/cm^2$, now Maximum explosion pressure rising velocity was $130.75 kg_f/cm^2/s$ at converted gas concentration $40\%$. Also, minimum ignition energy was 0.13 mJ at converted gas concentration $50\%$.

변성가스의 폭발특성을 평가하기 위하여, 산소농도 변화와 수소의 첨가에 따른 변성가스 조성을 변화시켜 폭발거동에 대한 실험을 행하였다. 이러한 실험을 행한 결과 산소농도 $21\%$에서 변성가스와 수소의 농도가 증가할수록 폭발하한계는 낮아졌으며, 산소농도 $6\%$에서 폭발한계산소농도를 구하였다. 변성가스의 최대폭발압력은 $4.61 kg_f/cm^2$의 최적값을 얻었고, 이때 최대폭발압력상승속도는 변성가스 농도 $40\%$에서 $130.75 kg_f/cm^2/s$를 구하였다. 또한 폭발에 필요한 최소점화에너지는 변성가스 농도 $50\%$에서 0.13 mJ를 구하였다.

Keywords