Attaphong, Chodchanok

Preferred name

Alternative Name

Attaphong, C.

Main Affiliation

School of Engineering

chodchanok.at@kmitl.ac.th

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Analyzing technique for electrical energy monitoring system in Thailand hospital
(2017-07-12)
Sarikprueck, Piampoom
;
Attaphong, Chodchanok
;
Lumyong, Pichit
;
Ngamwatthanasilpa, Bandit
An electrical energy monitoring system helps improve the security and reliability of a hospital operating system which can also indirectly enhance energy efficiency itself. However, a large hospital has a complex electrical system which leads to the big data issue from the installed monitoring system in this size-scaled hospital. Therefore, this paper proposes K-mean clustering technique, which is one of the effective data mining techniques, to analyze the big data from the electrical energy monitoring system in hospital. The case study is a large hospital with 200 in-patient beds in Thailand. Without loss of generality, electrical load profile is used for analyzing instead of using the electrical energy. Finally, the proposed data clustering technique is able to characterize electrical load profiles effectively for each hospital floor. This technique also identify the abnormality of these characterized electrical load profiles in various scenarios which hospital system operators can use them to consider the security, reliability, and energy efficiency of their operating systems.
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Effect of additives on fuel properties and emission characteristics of micromulsion biofuels from palm oil
(2017-07-12)
Attaphong, Chodchanok
;
Lumyong, Pichit
;
Wichadee, Sasiwimon
;
Khaodhiar, Sutha
;
Sarikprueck, Piampoom
Microemulsiflcation is one of the novel techniques to reduce viscosity of vegetable oils to avoid durability problems in diesel engines. Microemulsion biofuels are transparent, thermodynamically stable, and single-phase mixtures of vegetable oils and ethanol in the presence of surfactants and co-surfactants. Additives have also been included in microemulsion biofuel formulations to improve their stability and fuel properties; however, there is limited research on the effect of additives on emission characteristics of microemulsion biofuels. In this study, microemulsion biofuels were formulated from palm oil/diesel blend (1:1 v/v), ethanol, surfactant, and co-surfactants. Five additives, ethylene glycol butyl ether (EGBE), diethylene glycol ethyl ether (DEGEE), propylene glycol ethyl ether (PGEE), dipropylene glycol methyl ether (DPGME), and ethyl acetate (EA), were used to study the effect of additives on phase behaviors, fuel properties, and emission characteristics. The results showed that studied additives could improve some fuel properties of microemulsion biofuels with negligible effect on phase stability. Additionally, it was found that carbon monoxide (CO) emissions from microemulsion biofuels with DEGEE and EA, and nitrogen oxide (NOx) emissions from microemulsion biofuels with all additives were lower than those from diesel and biodiesel. Therefore, DEGEE and EA can be considered as promising additives for microemulsion biofuel formulations, which can improve fuel properties as well as can significantly reduce CO and NO<inf>x</inf> emissions below the levels of diesel and biodiesel. These encouraging results offer options of additives for biofuel applications.
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Phase behaviors and fuel properties of palm oil-based microemulsion biofuels using sugar-based surfactants
(2017-07-12)
Attaphong, Chodchanok
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Charoensaeng, Ampira
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Sorrasuchart, Nutthaporn
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Khaodhiar, Sutha
;
Arpornpong, Noulkamol
Due to environmental concerns and current fossil-fuel situations, palm oil has been considered as a potential vegetable oil for renewable biofuel applications in South East Asia. To solve durability problems in diesel engine caused by high viscosity of palm oil, microemulsification has led to more attention as a novel viscosity-reducing technique. Microemulsion biofuels are transparent, thermodynamically stable, and singlephase microemulsions, where the polar phase is solubilized in surfactant aggregates existing in the non-polar phase. Surfactants (surface active agents) play a key role in enhancement of the interaction between polar and non-polar phases. Since sugar-based surfactants have been derived from bio-based resources, they have been introduced to formulate microemulsion biofuels in this study. Three sugar-based surfactants, sorbitan monolaurate (SM20), sorbitan monooleate (SM80), and sorbitan trioleate (ST85) and three alcohols (butanol, hexanol, and octanol) were used as surfactants and co-surfactants, respectively. The objectives of this study are to formulate microemulsion biofuels using sugar-based surfactants, to study the effects of surfactants and co-surfactants on phase behaviors and kinematic viscosities, and to investigate the effect of surfactant/co-surfactant ratio on other fuel properties (i.e. energy content, cold flow properties, density, and ash content). The results show that the microemulsion system using SM80 and octanol at the molar ratio of 1 to 8 was considered as an optimized microemulsion biofuel formulation demonstrating comparable fuel properties to biodiesel. These results provide useful guidance for future design of environmentally friendly microemulsion biofuels.
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Magnetization of NdFeB Permanent Magnet Considering Demagnetization Effect
(2018-11-27)
Sarikprueck, Piampoom
;
Lumyong, Pichit
;
Niroiana, Chamakorn Na
;
Attaphong, Chodchanok
Electrical machine efficiency improvement has been paid more attention over the past years. Using Permanent Magnets (PMs) in various modern electrical machines is one of the most favorable approaches to increase machine efficiency. However, PMs still have a significant disadvantage that is the demagnetization issue. Therefore, these demagnetized PMs need to magnetize for regaining their initial capability considering the demagnetization level. Therefore, first of all, this paper proposes the demagnetization behavior of NdFeB PMs due to thermal effect. Then, these PMs are magnetized using a proposed simple magnetizing technique considering various demagnetization conditions. Finally, the results indicate that the most complete demagnetized PMs are able to significantly recover to their initial capability.
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Environmental Impact Assessment of Lead-Acid and Lithium-ion Battery Waste Management in Thailand
(2024-01-01)
Morawan, Nattaya
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Mungkhala, Issariya
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Attaphong, Chodchanok
;
Katers, John
;
Sarikprueck, Piampoom
This study used material flow analysis and life cycle impact assessment to evaluate the management of lead-acid and lithium-ion batteries in Thailand in 2022. Four scenarios were designed, employing two methods: landfilling and material recovery. Landfilling lead-acid and lithium-ion batteries showed significant negative environmental impacts. Lead recovery for lead-acid batteries waste also had negative impacts due to slag generation. However, metal recovery of lithium-ion battery waste, which recovered lithium carbonate and cobalt carbonate, demonstrated positive environmental outcomes. When comparing the two methods, landfilling was preferable for lead-acid batteries, whereas metal recovery was better for lithium-ion batteries. These findings provide essential information for battery management guidelines in Thailand and indicate that future research should explore additional methods and their economic aspect.

Attaphong, Chodchanok

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