Wasinarom, Kittipass

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Preferred name
Wasinarom, Kittipass
Alternative Name
Wasinarom, K.
Main Affiliation
Email
kittipass.wa@kmitl.ac.th

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    Item type:Publication,
    Formation of multiple combustion fronts in an imbert downdraft gasification reactor
    (2021-09-10)
    Wasinarom, Kittipass
    ;
    Sungworagarn, Sarawut
    ;
    Sathitruangsak, Prasan
    ;
    Onthong, Kasemsil
    The experimental study of downdraft gasification was performed in this paper. The operation which led to the formation of the second combustion front was pointed out. In this situation, both combustion fronts will lose their intensity and finally be extinguished. The operation was unintentionally stopped. It was revealed that the combustion front propagated upward in the reactor after starting the test. While it was about to reach the air inlet nozzle, the second combustion front was detected by an abrupt temperature rise of the thermocouple above the air supply nozzle. After the formation of the second combustion front, both fronts started to lose their intensity which indicated by the decrease in temperature corresponding with their locations. It was possible that the second combustion front would dilute the oxygen concentration supplied to the first combustion front. The decreasing temperature of the first combustion front reduced the heat transfer rate to the second combustion front. Finally, both combustion fronts were extinguished. The operation was unintentionally stopped.
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    Item type:Publication,
    Thermal Behavior of Biomass under Thermochemical Treatment at Different Air Fluxes in an Updraft Reactor
    (2023-05-01)
    Wasinarom, Kittipass
    ;
    Sungworagarn, Sarawut
    ;
    Sathitruangsak, Prasan
    ;
    Singmai, Wichean
    ;
    Onthong, Kasemsil
    Thermochemical treatment was investigated experimentally at different air fluxes in an updraft reactor. The test rig was equipped with a special attached door that will open at a specific time step. This unique feature allows investigators to obtain information on the packed bed color variation along the different heights of the reactor that evolves at different points in time. The analysis focused on the temperature dynamics obtained from installed thermocouples with the packed bed color variation at each time step. The investigation was conducted for three different supply air mass fluxes, which were 670, 480, and 190 kg/m<sup>2</sup>h. The general thermal behavior is addressed in the first part of the paper because it is similar for all different input air mass fluxes. Next, the distinctive operation parameters among different air mass fluxes are discussed; these included the hot spot zone, fuel conversion characteristic, temperature distribution, heat transfer, and kinetic activities along the height of the reactor.