Combustion stability and thermal efficiency in a porous media burner for LPG cooking in the food industry using Al 2 O 3 particles coming from grinding wastes

Herrera, Bernardo; Cacua, Karen; Villalba, Luis Carlos Olmos

doi:10.1016/j.applthermaleng.2015.08.079

Cited by 29 publications

(3 citation statements)

References 18 publications

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“…The thermal efficiency was calculated by considering the heat transferred from the system to the drying air ( _ Q air ) and the heat supplied by the burner (P). Equation (3) shows the variables considered in the thermal efficiency calculation (Herrera et al, 2015;Lapirattanakun & Charoensuk, 2017;Patangi et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…The thermal efficiency was calculated by considering the heat transferred from the system to the drying air (

{\dot{Q}}_{\mathrm{air}}

) and the heat supplied by the burner (

P

). Equation (3) shows the variables considered in the thermal efficiency calculation (Herrera et al, 2015; Lapirattanakun & Charoensuk, 2017; Patangi et al, 2007).

$$ {\eta}_{\mathrm{th}}=\frac{{\dot{Q}}_{\mathrm{a}\mathrm{ir}}}{P}=\frac{{\dot{m}}_{\mathrm{a},2}\times {c}_{p,a}\times \left({T}_{\mathrm{out}}-{T}_0\right)}{{\dot{m}}_{\mathrm{f}}\times \mathrm{LHV}}.

…”

Section: Discussionmentioning

confidence: 99%

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Experimental investigation of the use of a radiant porous burner in a novel dual hot air generator based on the food drying process

Hernández,

Arriagada,

Saavedra

et al. 2024

J Food Process Engineering

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Hot air generators are essential for food drying processes, operating in either indirect or direct modes. In this study, a high‐power radiant porous burner in a novel dual hot air generator (HAG‐D) was designed and experimentally investigated. Temperatures and emissions of the combustion process are reported for 9, 13, and 18 kW, and 20% and 40% of excess air. Indirect and direct modes were tested across airflow rates of 300–1100 m3/h to assess thermal efficiency. For indirect mode operation, 88% thermal efficiency is the highest value for 9 kW, 20% excess air, with an airflow of 890 m3/h observing air temperature difference (outlet minus inlet) of approximately 30°C. Furthermore, CO and NOx emissions were found in the range of 0–30 ppm and 20–45 ppm, respectively. For direct mode operation, results showed that for 18 kW with 20% and 40% excess air, the maximum thermal efficiency was 82% with an airflow of 670–1040 m3/h and air temperature difference in the range of 50–80°C. Results confirm that the radiant heat transfer mechanism allows for higher efficiencies and less pollution in a wide range of powers in the HAG‐D unit. The direct mode is recommended for food drying processes due to low exposure to flue gases, and the indirect mode is for other industrial applications due to its high efficiency. Future studies are suggested to assess renewable fuels, such as liquefied petroleum gas or natural gas and hydrogen mixtures, toward energy transition.Practical applicationsThe potential applications or practical benefits of the develop of this novel dual hot air generator is in the food industry, particularly in drying process of fruits and vegetables. Also, air conditioning, and space heating (household use) processes stand out among their several applications to generate hot air, such as paint, and wood.

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Section: Discussionmentioning

confidence: 99%

“…The thermal efficiency was calculated by considering the heat transferred from the system to the drying air (

{\dot{Q}}_{\mathrm{air}}

) and the heat supplied by the burner (

P

). Equation (3) shows the variables considered in the thermal efficiency calculation (Herrera et al, 2015; Lapirattanakun & Charoensuk, 2017; Patangi et al, 2007).

$$ {\eta}_{\mathrm{th}}=\frac{{\dot{Q}}_{\mathrm{a}\mathrm{ir}}}{P}=\frac{{\dot{m}}_{\mathrm{a},2}\times {c}_{p,a}\times \left({T}_{\mathrm{out}}-{T}_0\right)}{{\dot{m}}_{\mathrm{f}}\times \mathrm{LHV}}.

…”

Section: Discussionmentioning

confidence: 99%

Experimental investigation of the use of a radiant porous burner in a novel dual hot air generator based on the food drying process

Hernández,

Arriagada,

Saavedra

et al. 2024

J Food Process Engineering

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“…Cooking is one of the most heat‐consuming processes in our daily life, and the development of high heat‐efficient cooking devices that decrease the consumption of fossil fuel is essentially important. Herrera et al 78 . reported, when macroporous burners of Al 2 O 3 particle bed combined with SiSiC ceramic foams are used for cooking, the thermal efficiency in the conduction showed a significant advantage compared to free flame conventional burners, because it could improve the thermal efficiency between 7% and 14%.…”

Section: Macroporous Ceramics For Thermal Managementsmentioning

confidence: 99%

Macroporous ceramics for the sustainable development goals (SDGs): Review

Fukushima

Ohji

2022

Int J Applied Ceramic Tech

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The sustainable development goals (SDGs), including 17 goals and 169 targets, were adopted unanimously by the United Nations General Assembly in 2015.The aims are to end poverty, protect the planet, and ensure peace, health, and prosperity of all people over the world. Toward the SDGs, human beings must effectively utilize the global resources, such as (1) oceans, seas, rivers, lakes, and so forth that supply us with water and aquatic resources; (2) land, ground, and soil where we can raise agricultural crops and livestock; (3) forests and woods that provide us with lumber and paper and convert carbon dioxide to oxygen; and (4) fossil fuel and mineral resources, which are essential to our modern lives. The use of macroporous ceramics is definitely conducive to the solutions to achieve the SDGs, because it can help solve many of the related technical issues. This review addresses macroporous ceramics primarily for filtration and purification, agriculture and fisheries industry, thermal managements, sensing devices, and constructions, which contribute to achieving SDGs.

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Experimental investigation on dynamic characteristics of methane/air combustion in double‐layer pellets porous media

Wang,

Wang

et al. 2024

Asia-Pacific J Chem Eng

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The double‐layer porous media burner is considered as an effective way to realize stable lean‐burn. In order to quickly achieve a stable combustion state in a double‐layer porous media burner, this work investigated the dynamic characteristics of methane/air premixed combustion in a bench‐scale double‐layer porous media burnspanning from ignition to stable combustion and ultimately flameout. The experimental results indicate that regulating the equivalence ratio and the inlet velocity enables the establishment of a stable flame front and the φ = 0.75 and the Vin = 0.20 m/s are the appropriate start‐up conditions. The average propagation velocity of the combustion wave variation along the axial direction and ranged approximately from −0.022 to −0.078 mm/s. Moreover, the transition time to a stable combustion state is reduced by nearly 47.14% as the equivalence ratio increases from 0.60 to 0.70. During start‐up stage, there are significant fluctuations in CO and NOx concentrations, but both emissions remain low during steady combustion state, with the maximum concentrations of 37.5 and 40.2 mg/m3, respectively. Furthermore, the porous media combustion exhibits a pronounced re‐ignition capacity. At higher equivalence ratios, longer interruptions of premixed gas are allowed.

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Combustion stability and thermal efficiency in a porous media burner for LPG cooking in the food industry using Al 2 O 3 particles coming from grinding wastes

Cited by 29 publications

References 18 publications

Experimental investigation of the use of a radiant porous burner in a novel dual hot air generator based on the food drying process

Experimental investigation of the use of a radiant porous burner in a novel dual hot air generator based on the food drying process

Macroporous ceramics for the sustainable development goals (SDGs): Review

Experimental investigation on dynamic characteristics of methane/air combustion in double‐layer pellets porous media

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