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Experimental Research to Increase the Combustion Efficiency in the Top-Lit Updraft Principle Based Gasifier

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  • Ioan Pavel

    (National Institute of Research & Development for Optoelectronics/INOE 2000, Subsidiary Hydraulics and Pneumatics Research Institute/IHP, Cutitul de Argint 14, 040558 Bucharest, Romania)

  • Radu Iulian Rădoi

    (National Institute of Research & Development for Optoelectronics/INOE 2000, Subsidiary Hydraulics and Pneumatics Research Institute/IHP, Cutitul de Argint 14, 040558 Bucharest, Romania)

  • Gabriela Matache

    (National Institute of Research & Development for Optoelectronics/INOE 2000, Subsidiary Hydraulics and Pneumatics Research Institute/IHP, Cutitul de Argint 14, 040558 Bucharest, Romania)

  • Ana-Maria Carla Popescu

    (National Institute of Research & Development for Optoelectronics/INOE 2000, Subsidiary Hydraulics and Pneumatics Research Institute/IHP, Cutitul de Argint 14, 040558 Bucharest, Romania)

  • Kati Pavel

    (National Institute of Research & Development for Optoelectronics/INOE 2000, Subsidiary Hydraulics and Pneumatics Research Institute/IHP, Cutitul de Argint 14, 040558 Bucharest, Romania)

Abstract

The recovery of vegetal waste for energy purposes is one of the ways to increase the amount of energy obtained from renewable sources. The Top-Lit Updraft (TLUD) gasification and combustion process is recognized as the least polluting of all other combustion processes, resulting in a sterile charcoal called biochar, which can be used as an amendment in agricultural soils. The purpose of this research was to determine the influence of excess air in the combustion area compared to the (theoretical) calculated requirement for a TLUD energy module. Most scientific publications on this topic recommend primary/secondary air flow rate ratios of 1/3 or 1/4. In this study, the two recommended ratios were tested, and it was found that better energy results correspond to the ratio of 1/3. For this 1/3 ratio, the investigations continued in order to optimize the combustion process. The results achieved demonstrate that the excess combustion air flow of 30% improves the performance of the energy module due to the increase in oxygen supply and the increase in air speed in the combustion area of the syngas resulting from gasification. Increasing the excess combustion air flow rate by +50% had the effect of lowering the temperature in the flame due to the cooling of the combustion gases caused by a too high rate of excess cold air flow.

Suggested Citation

  • Ioan Pavel & Radu Iulian Rădoi & Gabriela Matache & Ana-Maria Carla Popescu & Kati Pavel, 2023. "Experimental Research to Increase the Combustion Efficiency in the Top-Lit Updraft Principle Based Gasifier," Energies, MDPI, vol. 16(4), pages 1-19, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:1912-:d:1068980
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    References listed on IDEAS

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    1. Toklu, E., 2017. "Biomass energy potential and utilization in Turkey," Renewable Energy, Elsevier, vol. 107(C), pages 235-244.
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