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Communication Dans Un Congrès Année : 2022

Minimum diameters for CH4 /H2 -air mixtures: implications for natural gas cooktop burners

Résumé

The minimum detonation diameter for methane (CH4) / hydrogen (H2)-air mixtures is numerically evaluated to assess detonation risks in cooktops designed to work with natural gas. A one-dimensional mathematical model that considers heat and friction losses for detonations propagating in pipes is used for that purpose. The initial conditions are selected to emulate the operation of a commercial cooktop working with different CH4 /H2 blends. Results show that for H2 content in the blend higher than 45 %, a conventional cooktop air-fuel mixer may pose a detonation hazard since the minimum detonation diameters predicted by the model are smaller than the diameter of the mixing tube (i.e., dmin < dmixer). Additionally, the individual effect of equivalence ratio, Φ, and hydrogen content, % H2 , in the fuel blend are evaluated separately. An increased risk of detonation is present for (i) CH4 /H2-air mixtures with Φ → 1, and (ii) higher % H2 content.
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Dates et versions

hal-03828745 , version 1 (25-10-2022)

Identifiants

  • HAL Id : hal-03828745 , version 1

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Cristian Camilo Mejia-Botero, Fernando Veiga-Lopez, J. Melguizo-Gavilanes. Minimum diameters for CH4 /H2 -air mixtures: implications for natural gas cooktop burners. 14th International Symposium on Hazards, Prevention and Mitigation of Industrial Explosions (ISHPMIE 2022), Jul 2022, Braunschweig, Germany. ⟨hal-03828745⟩
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