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Author: search.filters.author.Chaiaiad, ChatchapatSubject: search.filters.subject.finite element analysis

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    Item type:Publication,
    Development of a Small Ultrasonic Cleaning Bath based on Harmonic Response Analysis
    (2024-01-01)
    Worradechaudom, Warakorn
    ;
    Chaiaiad, Chatchapat
    ;
    Thongsri, Jatuporn
    This article reports the development of a 0.27 L small ultrasonic cleaning bath (SUCB) with a 45 kHz single transducer to enhance cleaning efficacy based on harmonic response analysis (HRA). First, the HRA results revealed the uneven acoustic pressure inside the SUCB emerged from the transducer, depending on the applied voltage. As expected, the higher the applied voltage, the greater the acoustic pressure, and away from the transducer, the acoustic pressure decreased, consistent with the foil corrosion test, confirming the research methodology's credibility. Then, the transducer has been redesigned to develop the SUCB. Last, using the HRA, the simulation results indicated that the redesigned transduce, adding front and back masses like a horn shape, enhanced the acoustic pressure and helped to increase cleaning efficacy compared to the conventional SUCB. The findings were applied to develop a new generation of the SUCB. This article presents a step-by-step HRA technique that can be practically used in manufacturing design.
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    Transient Thermal-Electric Analysis of Peltier Cooling Plate for Developing a Mini Refrigerator
    (2024-01-01)
    Chaiaiad, Chatchapat
    ;
    Thongsri, Jatuporn
    This article reports a transient thermal-electric analysis (TEA), a simulation of a Peltier cooling plate (PCP) aimed to develop into a mini refrigerator soon. This conventional PCP includes 110 Peltier cells, which are a series of connecting cells, and two sandwiched ceramic plates. First, the experiment measured the PCP's applied current (I) and temperature (T) under the desired conditions. Then, the TEA was employed to determine the I and T of the PCP, which were compared with the experimental results. As expected, the comparison shows the consistency between the simulation and experimental results, validating the credibility of the methodology and simulation results. The simulation results revealed that the temperature difference (Δ T) between the two sandwiched ceramic plates increased with the increase of I and the number of cells, as expected. Last, the proposed model of PCP, I of 500 mA, 126 Peltier cells, and reducing the gap between cells, could generate T of -2.3761C on the cool ceramic plate lower than the conventional model of -1.6495 C, about 44% reduction at the same I, suitable for developing the mini refrigerator. The novel of this article is the practical methodology of using transient TEA to help design the PCP for specific purposes.