Impact Analysis of Ignition Energy for Gas Explosive Limit

2013 ◽  
Vol 827 ◽  
pp. 255-258
Author(s):  
Xiang Bao Meng ◽  
Guo Liang Yu ◽  
Qing Guo Yao ◽  
Chun Yan Bao
Keyword(s):  
Impact Analysis ◽  
Ignition Energy ◽  
Gas Explosion ◽  
Explosion Limit ◽  
Explosion Accidents ◽  
Explosive Limit

Under the different experimental condition of ignition energy, the variations of gas explosive limit were obtained. The explosive limit ranges from 4.86% to 16.72%, under the condition of high ignition energy of 450 J. The result is quite different from the theoretical explosion limit range from 5% to 16%, thus providing a new basis to effectively prevent the gas explosion accidents.

scholarly journals Application Runs the Show: What Can We Learn about the Future from the Past?

Proceedings ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 53
Author(s):  
Nicolae Barsan
Keyword(s):  
Safety Issue ◽  
Gas Explosion ◽  
The Past ◽  
The Future ◽  
Explosion Accidents

SMOX-based sensors appeared as a response to a very serious safety issue in Japan, namely gas explosion accidents related to leakages of piped and bottled cooking gas. […]

Evaluation of propane explosion with applied water mist

2021 ◽  
Vol 39 (6) ◽  
pp. 443-454
Author(s):  
Ping-Jung Li ◽  
Chao-Shi Chen ◽  
Cheng-Yu Weng ◽  
Hsin-Hsiu Ho
Keyword(s):  
Water Mist ◽  
Experimental Results ◽  
Gas Explosion ◽  
Applied Water ◽  
Occurrence Time ◽  
Fuel Concentration ◽  
Explosion Suppression ◽  
Explosion Limit ◽  
Air Speed ◽  
Entrained Air

This article discusses the overpressure of a gas explosion and the performance of applying water mist for explosion suppression. According to the experimental results, the larger the opening area, the more difficult it is for pressure to accumulate, resulting in lower overpressure of a gas explosion. When the opening was opened under a high air speed environment, the amount of entrained air was greater. Consequently, the occurrence time of the explosion was shorter than at a low air speed. Despite the water mist nozzle being installed outside the enclosure, a propane gas explosion still occurred regardless of the amount of water mist used, failing to suppress the explosion. However, the water mist nozzle installed inside the enclosure supplied an adequate amount of water mist that could wash a part of the propane, resulting in the fuel concentration dropping below the lower explosion limit, hindering the occurrence of an explosion.

Practical Considerations for the Structural Analysis of Offshore Topside Structures Under Gas Explosion Accidents

2012 ◽  
Author(s):  
Dae Suk Han ◽  
Gyusung Kim ◽  
Woo Seung Sim ◽  
Young Sik Jang ◽  
Hyun Soo Shin
Keyword(s):  
Structural Analysis ◽  
Offshore Structures ◽  
Structural Members ◽  
Gas Explosion ◽  
Element Analysis ◽  
Numerical Investigations ◽  
The Finite Element Analysis ◽  
Explosion Accidents ◽  
Blast Loadings ◽  
Dynamic Structural Analysis

Gas explosion accidents have been recognized as a major hazard of offshore facilities in oil & gas industries. Due to the nature of offshore topside structures, even a single collapse of structural members or equipments may lead to enormous economic and environmental losses. Therefore, such potential hazards that cause the accidental collapse need to be evaluated closely. Gas explosion has been categorized as an important issue of the design of offshore structures regarding the severity of the accident. This paper presents practical considerations for the nonlinear dynamic structural analysis of offshore structures under blast loadings from gas explosion accidents. Numerical investigations including modeling of blast loads and idealization of structural materials and members have been conducted for the overall topside structures. As a design step for offshore structures under blast loadings, an applicable guidance on the finite element analysis (FEA) is described in this study.

A statistical analysis of coal gas explosion accidents in China

2014 ◽  
pp. 659-663
Author(s):  
Yongguo Cui ◽  
Beijing Xie ◽  
Jialin Cao ◽  
Chuan Wang
Keyword(s):  
Statistical Analysis ◽  
Gas Explosion ◽  
Coal Gas ◽  
Explosion Accidents

Research and Development of Nanometer Al2O3 Material Made for Rapid Detection of Gas Concentration Sensor

2013 ◽  
Vol 303-306 ◽  
pp. 42-44
Author(s):  
Hai Chen Li
Keyword(s):  
Research And Development ◽  
Gas Sensor ◽  
Rapid Detection ◽  
Test Results ◽  
Gas Explosion ◽  
Powder Preparation ◽  
Preparation Technology ◽  
Gas Concentration ◽  
Explosion Accidents ◽  
Sensor Detection

Coal Face Gas Concentration Overrun Is the Leading Cause of China Coal Mine Fatal Gas Explosion Accidents Reasons. Therefore, Research and Development of Rapid Detection of Gas Sensor Can Avoid Gas Explosion Accident Key. this Paper Studies the Al2o3 Nanometer Powder Preparation Technology, by Doping Rare Earth Material so that the Gas Sensor Detection Element Surface Area Was Greatly Improved; its Sensitivity and Stability Are Greatly Improved. According to the Test Results Show that, the Rapid Gas Sensor for Methane Reaction Time Is 6 Seconds, Recovery Time of 8 Seconds.

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