Investigation on combustion in porous inert burners using gaseous and liquid fuels

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Several respiratory and chronic obstructive lung diseases in developing countries have been attributed to the higher levels of indoor pollution. The domestic cooking gas burner is one such device that contributes significantly to this category of emission levels. In India and many other developing countries, the household cooking gas burners use petroleum products like liquefied petroleum gas (LPG) and kerosene as common fuels because their emissions are relatively clean compared to biomass. However, the indoor air pollution has still been of great concern due to the increasing emphasis on more stringent pollution emission requirements. Moreover, considering the increase in demand of LPG and kerosene consumption, as well as depleting fossil fuel conserves, there is a need to not only improve the thermal performances of existing gaseous and liquid fuels fired cooking stoves, but at the same time extensive research is required to check the feasibility and flexibility of burning alternative energy sources in these improved cooking burners. Therefore, towards enhancing the thermal performance and fuel flexibility of existing domestic cooking stoves, the present work employs the heat recirculation mechanism of the porous medium (PM) combustion to these burners offering greater fuel compatibility for both liquefied petroleum gas (LPG) and renewable fuel dimethyl ether (DME). To establish the advantages of DME combustion than that of LPG within the stove, experimental measurements and numerical modeling are performed in a two-layer PM burner. Furthermore, towards extending the applicability of the PM burner to liquid fuel combustion, the flame behavior, soot particulates and other hazardous pollutants of the porous burner integrated kerosene pressure stove are extensively examined for various operating conditions.
Supervisors: Subhash C. Mishra and Gautam Biswas