Abstract
Porous media burner (PMB) is widely used in a variety of practical systems, including heat exchangers, gas propulsion, reactors, and radiant burner combustion. However, thorough evaluations of the performance of the PMB based on the usefulness of entropy generation, thermal and exergy efficiency aspects are still lacking. In this work, the concept of a double-layer micro PMB with a 23 mm cylindrical shape burner was experimentally demonstrated. The PMB was constructed based on the utilization of premixed butane-air combustion which consists of an alumina and porcelain foam. The tests were designed to cover lean to rich combustion with equivalence ratios ranging from ϕ = 0.6 to ϕ = 1.2. It was found that the maximum thermal and exergy efficiency was obtained at ϕ = 1.2 while the lowest thermal and exergy efficiency was found at ϕ = 0.8. Furthermore, the findings also indicated that the total entropy generation, energy loss, and exergy destroyed yield the lowest values at ϕ = 1.0 with 0.0048 W/K, 98.084 W, and 1.456 W, respectively. These values can be stated to be the suitable operating conditions of the PMB. The findings provided useful information on the design and operation in a double-layer PMB.
Highlights
Combustion technology is quickly evolving as a result of the increased demand in our daily life and posing a danger to the depletion of fossil fuels
The use of porous media in combustion burners offers the benefits to the Porous media burner (PMB) by allowing the burner to function in lean mixtures with a minimal quantity of fuel mixture to create optimal performance
The submerged flame disappeared as the equivalence ratio move from 1.1 to 1.2 and surface flame start to developed at φ = 0.9
Summary
Combustion technology is quickly evolving as a result of the increased demand in our daily life and posing a danger to the depletion of fossil fuels. One of the most common uses of fossil fuels is in home burners and industrial radiant burners. This issue has impacted the demand for fossil fuels and has markedly increased the price, which cannot be tolerated. These fuels commonly generate the emission pollutions such as carbon monoxide (CO) and nitrogen oxide (NOx ) that negatively affect the environment and create health problems [1,2]. The research concept forwarded here focuses on the investigation and analyses of a double-layer micro PMB technology that is suited for premixed butane-air combustion
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