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Author: search.filters.author.Payakkawan, Poomyos

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    Chaotic control for the reactor of a continuous microwave biomass carbonization process
    (2015-04-23)
    Payakkawan, Poomyos
    ;
    Jansri, Anurak
    ;
    Phumpho, Suwilai
    ;
    Tong-Aram, Direk
    ;
    Keattipun, Pithuk
    This paper presented a new heating technique using chaotic mode pattern generator to control a uniform- heating distribution of multi-feed microwave cavity in order to heat the reactor of a pilot-scale continuous microwave biomass carbonization process This technique not only suggest the potential of the proposed system which operates more smoothly but also reduce electric power consumptions of the continuous microwave biomass carbonization process.
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    Design, fabrication and operation of continuous microwave biomass carbonization system
    (2014-06-01)
    Payakkawan, Poomyos
    ;
    Areejit, Suwilai
    ;
    Sooraksa, Pitikhate
    This paper presents a new design and the fabrication of biomass carbonization system using microwave heating. The heating system employs multi-feed microwave generators with 8.5kW maximum power and 2.458GHz frequency for uniform heating distribution in a 0.847m<sup>3</sup> cylindrical low cement castable reactor. The experiment entails the carbonization of 58,800kg of coconut shell for 7 days. Afterward, the charcoal and wood vinegar yields are analyzed; meanwhile, uncondensed gases are treated to fuel the engine-generator system. The results show that the proposed approach greatly saves the production time of charcoal yields and allows ease of temperature control. © 2013 Elsevier Ltd.
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    Anti-copy of 2D Barcode Using Multi-encryption Technique
    (2014-01-01)
    Phumpho, Suwilai
    ;
    Payakkawan, Poomyos
    ;
    Jansri, Anurak
    ;
    Tongaram, Direk
    ;
    Promprayoon, Chirasak
    2D barcode can be found largely at product of department store. The general purpose of 2D barcode is to identify product. Process of 2D barcode is run in the assembly production line. Nowadays, the simple 2D barcode can be easily copied. Then, this paper proposes new technique to generate 2D barcode. The technique is multi encryption by chaotic equation that is very difficult to reproduce. In experimental design, 2D barcode can be used only one-time and can be recorded into decoding system to protect repeating. This paper has led to real benefit for Fresh Group company limited in Thailand.
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    Novel microwave carbonization system for coconut shells
    (2013-10-07)
    Payakkawan, Poomyos
    ;
    Areejit, Suwilai
    ;
    Sooraksa, Pitikhate
    This paper presented a novel heating technique of biomass carbonization system using microwave radiation. The heating system employs multi-feed microwave generators for uniform heating distribution without stirrer mechanism in a 0.847 m<sup>3</sup> cylindrical low cement castable reactor. The experiment entailed the carbonization of 3,500 kg of coconut shell at 450°C for 10 hr. Afterward, the charcoal and wood vinegar yields were analyzed; meanwhile, uncondensed gases were treated to fuel the engine-generator system. The results show that the proposed approach greatly saves the production time of charcoal yields and allows ease of control. © (2013) Trans Tech Publications, Switzerland.
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    Design and implementation of continuous microwave biomass carbonization system
    (2012-08-10)
    Payakkawan, Poomyos
    ;
    Areejit, Suwilai
    ;
    Jansri, Anurak
    ;
    Klomkarn, Kitdakorn
    ;
    Aoyama, Hisayuki
    This paper discusses a new design and implementation of a microwave heating for continuous biomass GHz frequency. This new technique is developed to control electromagnetic field distribution inside the microwave heating cavity reactor of biomass carbonization. A chaotic mode pattern microwave generator is used for the technique. The result shows that the technique gives the cost and time-saving, easy to control, and effective performance. © 2012 IEEE.
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    Chaotic application for Industrial Microwave Heating System without mode-stirring mechanism
    (2012-08-10)
    Areejit, Suwilai
    ;
    Payakkawan, Poomyos
    ;
    Jansri, Anurak
    ;
    Klomkarn, Kitdakorn
    ;
    Aoyama, Hisayuki
    More than two decades, chaos has been attracted many attention from scientists and engineers. Chaotic system phenomenon seems to be random for observers, but it is deterministic for a designer. System of Chaos attractors have been constructed more than a thousand of chaotic patterns. But implementation of chaos in engineering is still needed for real application. For this sake, the research objective is to search for new chaotic applications for Industrial Microwave Heating System without mode-stirring mechanism. The result shows that the performance of the proposed system is better than the conventional system in the rise of temperature. Eventually, the proposed method can be applied in the real application. © 2012 IEEE.
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    Generating hyper-chaotic attractor from Van der Pol system
    (2009-12-01)
    Klomkarn, Kitdakorn
    ;
    Payakkawan, Poomyos
    ;
    Sooraksa, Pitikhate
    This paper presents a new hyper-chaotic system derived from Van der Pol system. The system is a simple model for generating a hyper-chaotic attractor. The dynamics of the proposed system is demonstrated both in numerical simulations and electronic circuit realization. ©2009 IEEE.
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    Dual-line PID controller based on PSO for speed control of DC motors
    (2009-12-01)
    Payakkawan, Poomyos
    ;
    Klomkarn, Kitdakom
    ;
    Sooraksa, Pitikhate
    This paper proposes an AI-based heuristic optimization techniques based on particle swarm optimization (PSO) to solve two applications i.e. identification of a DC motor and tuning PID controller parameters. The identification of a DC motor application, the 2<sup>nd</sup> order transfer function with time delays is obtained by the searching poles location mechanism based on PSO. This method has following steps. First, time responses of speed are determined by multi-level step input voltages. Second, the noises of time responses are reduced by wavelet soft thresholding. Finally, the noiseless time responses are identified by PSO. The tuning PID controller parameters application, the gains of proportional, integral, and derivative are determined both off-line and on-line tuning. For off-line tuning, the PID gains are optimized by PSO. On-line application, PSO-gains scheduling, adaptively adjusts the controller gains to improve the speed response under changing the speed demand and load. The simulation results show that the PSO can be efficiently used for system identification and tuning parameters of PID controller. ©2009 IEEE.