Murathathunyaluk, Siripan

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Preferred name
Murathathunyaluk, Siripan
Alternative Name
Murathathunyaluk, S.
Main Affiliation
Email
siripan.mu@kmitl.ac.th

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    Item type:Publication,
    Effect of regeneration conditions on dehumidification desiccant packed bed
    (2019-01-01)
    Murathathunyaluk, Siripan
    ;
    Junjiewchai, Jarukit
    ;
    Kitchaiya, Prakob
    In the present study, dynamic performance of a dehumidification desiccant regeneration system has been investigated theoretically. The simulation of the combined heat and mass transfer that occur in a solid desiccant packed bed is carried out with MATLAB. The presented model takes into account only forced convection along the bed without heat conduction and heat loss across the wall. The simulated results are validated with the previous published studies. Using the explicit finite differential numerical method, the performances of dehumidification systems are presented by moisture removal capacity (MRC). The dynamic systems have been studied at the regeneration temperatures between 60 to 120 °C and air flow ratio between 0.2 to 2. Increasing the regeneration temperature and the regeneration air flow ratio are shown to have positive effect to MRC. However, excessively increase these values leads to the constant of MRC. Therefore, optimum values for these manipulated parameters has been examined. The result of this study help reducing heat consumption for regenerating heated air; as well as, reducing electric consumption used by the fan.
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    Item type:Publication,
    Theoretical study on a novel temperature breakpoint cyclic operation to enhance desiccant packed bed performance
    (2021-08-01)
    Murathathunyaluk, Siripan
    ;
    Kitchaiya, Prakob
    In a conventional desiccant packed bed dehumidification, the adsorption and desorption operations switched at a constant cycle. However, this Conventional Steady Cyclic (CSC) operation was not performed well under disturbances. Therefore, a Temperature Breakpoint Cyclic (TBC) operation is proposed. A numerical model of the desiccant packed bed dehumidification system has been constructed and validated. The model was then used to assess the desiccant packed bed dehumidification performances in term of moisture removal capacity (MRC) and dehumidification coefficient of performance (DCOP) under various cycle times and temperature factors. The calculation results showed that under CSC, larger amounts of energy were required in the desorption operation, while the TBC exhibited higher performances in term of both MRC and DCOP. Notably, at a high regeneration temperature, the MRC of the TBC was 10% higher than the CSC's; moreover, the DCOP of the TBC was twice higher than the CSC's. In other words, at high recovery temperature, both operations exhibited comparable capacities while the energy cost was halved under TBC operation.