Large-scale experimental investigation of the effects of gas explosions in underdrains

Hou, Longfei; Li, Yuanzhi; Qian, Xinming; Shu, Chi‐Min; Yuan, Mengqi; Duanmu, Weike

doi:10.1016/j.jnlssr.2021.03.001

Cited by 8 publications

(4 citation statements)

References 20 publications

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“…Dangerous gases are sufficiently toxic or reactive substances that vigorously or violently give off heat and energy, and become poisonous in contact with air, water, or some other common material. They can be classified in various ways, including acutely toxic, corrosive, flammable, dangerously reactive, and oxidizing compounds [1][2][3][4][5][6][7]. Toxic compounds include hydrogen chloride, benzene or toluene, dioxin, and volatile organic compounds (VOCs, such as hydrocarbons, fluorocarbons, chlorofluorocarbons.…”

Section: Introductionmentioning

confidence: 99%

“…A particular quantity of hazardous/toxic gases pollutes the atmosphere and can significantly influence human health, creating severe illnesses and threatening worker safety. This expanding number of dangerous gases is sometimes the cause of catastrophic incidents, ruining assets and the causing the deaths of many people [4], [8][9][10]. Therefore, toxic gases may be acidic, explosive, and extremely dangerous, depending on the concentration and surroundings.…”

Section: Introductionmentioning

confidence: 99%

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Mobile Gas Sensing for Laboratory Infrastructure

Sarif,

Al-Okby,

Roddelkopf

et al. 2024

IIUMEJ

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Indoor air quality has become a growing concern in modern society due to prolonged indoor working hours that lead to the frequent exposure to numerous toxic gases from various sources. These pollutants, including volatile organic compounds (VOCs), pose severe health risks such as asthma and lung cancer. To address this critical issue, this project focuses on developing and evaluating an advanced gas detection system that explicitly targets VOCs by integrating two novel metal oxide semiconductor (MOX)-based gas sensors, ENS 160 and TED110. Different sensor parameters, such as the air quality index (AQI) and volatile organic compounds (VOCs), were evaluated using 12 volatile organic chemicals. The findings revealed that the ENS 160 sensor performs excellently, detecting 60 gas samples out of 72, with an average detection rate of approximately 83%. In contrast, the TED110 sensor demonstrated considerably lower performance and response in 24 out of 72 gas samples, with a detection rate of about 33%. The results contribute insights into the gas sensor's characteristics, providing essential information to enhance indoor air quality monitoring technology, particularly in laboratory environments. ABSTRAK: Setiap hari, banyak gas toksik, letupan dan beracun berlaku di dalam dan di luar rumah daripada pelbagai sumber. Dalam masyarakat moden, kebanyakan orang menghabiskan 90% masa bekerja mereka di dalam rumah; oleh itu, kualiti udara dalaman secara beransur-ansur bertambah buruk daripada suasana luar. Projek ini sedang membangunkan sistem pengesanan dan pemantauan moden yang canggih untuk mengesan pelbagai gas berbahaya, seperti sebatian organik meruap (VOC). Dua penderia gas berasaskan semikonduktor oksida logam (MOX) novel telah diperkenalkan dalam projek ini dengan mikropengawal yang dikemas kini untuk pemerolehan data dan pemprosesan data. Tambahan pula, parameter sensor yang berbeza (AQI, TVOC) telah dinilai dengan 12 bahan kimia organik yang tidak menentu. Semua ujian telah dijalankan dalam tudung kimia tradisional dengan tiga kuantiti sampel yang berbeza (5?L, 10?L, 50?L) pada jarak 40 cm dan 100 cm. Akhir sekali, volum minimum yang boleh dikesan berdasarkan jarak antara nod sensor dan sumber bocor telah dianalisis selepas eksperimen yang meluas dengan kedua-dua sensor. Sensor ENS 160 sedang mengesan 60 sampel gas daripada 72, dalam ketiga-tiga parameter seperti AQI, TVOC dan kadar pengesanan CO2 sekitar 83%. TED110 menunjukkan prestasi yang sangat rendah; ia telah bertindak balas kepada 24 daripada 72 sampel gas, dan kadar pengesanan ialah 33%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mobile Gas Sensing for Laboratory Infrastructure

Sarif,

Al-Okby,

Roddelkopf

et al. 2024

IIUMEJ

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“…The application of small-scale experiments could not fully evaluate the complex, simultaneous, and coupling effects of pressure, temperature, and seismic waves, which were not linearly related . There are fewer studies on the analysis of real explosion phenomena in large-scale gas explosion experiments. , In addition, natural wind and high-pressure gas leakage will increase the turbulence intensity of the gas cloud, which could aggravate the consequences of an explosion.…”

Section: Introductionmentioning

confidence: 99%

“…17 There are fewer studies on the analysis of real explosion phenomena in large-scale gas explosion experiments. 18 , 19 In addition, natural wind and high-pressure gas leakage will increase the turbulence intensity of the gas cloud, which could aggravate the consequences of an explosion.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on Deflagration Characteristics of Large-Scale Propane–Air Mixture

Chen

Wang

et al. 2023

ACS Omega

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Seven deflagration tests of a propane−air mixture were carried out in a 22.5 m 3 large-scale chamber. The effects of initial volume, gas concentration, and initial turbulence intensity on deflagration characteristics were analyzed. The main frequency of the explosion wave was quantitatively determined by the combination of the wavelet transform and energy spectrum analysis. The results show that the explosive overpressure is formed by the discharge of combustion products and secondary combustion, and the effects of turbulence and gas concentration on the explosive overpressure are higher than the initial volume. Under the condition of weak initial turbulence, the main frequency of gas explosion wave is between 32.13 and 48.33 Hz. Under strong initial turbulence conditions, the main frequency of the gas explosion wave increases with the increase of overpressure, and the empirical formula of the relationship between the main frequency and overpressure is summarized, which could provide theoretical support for the design of mechanical metamaterials for oil and gas explosion. Finally, the flame acceleration simulator numerical model was calibrated through tests, and the overpressure simulation values were in good agreement with the experimental data. The leakage, diffusion, and explosion of a liquefied hydrocarbon loading station in a petrochemical enterprise were simulated. The lethal distance and explosion overpressure at key buildings are predicted for different wind speed conditions. The simulation results can provide a technical basis for evaluating personnel injury and building damage.

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An overpressure-time history model of methane-air explosion in tunnel-shape space

Chen

et al. 2023

Journal of Loss Prevention in the Process Industries

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Large-scale experimental investigation of the effects of gas explosions in underdrains

Cited by 8 publications

References 20 publications

Mobile Gas Sensing for Laboratory Infrastructure

Mobile Gas Sensing for Laboratory Infrastructure

Experimental and Numerical Study on Deflagration Characteristics of Large-Scale Propane–Air Mixture

An overpressure-time history model of methane-air explosion in tunnel-shape space

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