Chungcharoen, Thatchapol

Preferred name

Alternative Name

Chungcharoen, T.

Main Affiliation

KMITL Prince of Chumphon Campus

thatchapol.ch@kmitl.ac.th

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Effects of inner angle of bowl, flow rate and speed on the efficiency of glycerol separation from the raw biodiesel using cylindrical bowl centrifuge
(2017-01-01)
Chungcharoen, Thatchapol
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Netjaibun, Kanokphan
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Pratabkong, Thaweesak
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Suwannasam, Puttapong
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Limmun, Warunee
The centrifugal technique has been widely used for separation of fluids with moderately high viscosities because it provides an efficient separation in short residence times. In this work, the cylindrical bowl centrifuge was selected for separation of raw biodiesel and glycerol. In addition, the inner angle of bowl, flow rate and speed were investigated on their effects on the efficiency of separation. The experimental results showed that the inner angle of bowl and the flow rate affected the efficiency of separation significantly. The increase of inner angle of bowl (from 90 to 135 degree) and flow rate (from 50 to 200 ml/min) provided the increase of separation efficiency. In term of speed, the efficiency of separation was increased when increasing the speed from 1,800 rpm to 2,100 rpm. On the other hand, the efficiency of separation was decreased when increasing the speed from 2,100 rpm to 2,400 rpm. The efficiency of cylindrical bowl centrifuge was in the ranges of 29.17-39.83%, 52.83-61.83% and 84.6-91.4% for bowl inner angles of 90, 120 and 135 degree, respectively. The bowl inner angles of 135 degree, flow rate of 200 ml/min and speed of 2,100 rpm were appropriate conditions for glycerol separation from the raw biodiesel using cylindrical bowl centrifuge.
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Prototype of portable robusta coffee harvesting machine
(2021-11-19)
Ruttanadech, Nuttapong
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Chungcharoen, Thatchapol
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Sansiribhan, Sansanee
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Munsin, Ronnachart
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Thuwapanichayanan, Ratiya
The limitations of machine size and cost are main problems for coffee harvesting using machine picking. Therefore, the prototype of Robusta coffee harvesting machine with portable and low cost was designed and created in this research. Moreover, the effects of bristle hardness, bristle size and brush rotation speed on the coffee harvesting efficiency were investigated. The experimental results showed that the prototype of portable Robusta coffee harvesting machine was effective to harvest the Robusta coffee. It provided the highest coffee harvesting efficiency of 75.24% by using the bristle hardness of 75 shore A, bristle size of 8 mm and brush rotation speed of 700 rpm. The bristle hardness, bristle size and brush rotation speed were significantly affected the coffee harvesting efficiency. The coffee harvesting efficiency was increased when increasing the bristle hardness from 60 shore A to 75 shore A and the brush rotation speed from 600 rpm to 700 rpm. On the other hand, the increase of bristle size from 8 mm to 10 mm provided the lower coffee harvesting efficiency.
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The performance of size grading machine of robusta green coffee bean using oscillating sieve with swing along width direction
(2019-09-09)
Srisang, N.
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Chanpaka, W.
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Chungcharoen, T.
Size grading is one of important processes for producing the Robusta green coffee bean because it can increase the value of green coffee bean and decrease the problem in the manufacturing process, especially roasting process. Therefore, the objective of this work was to investigate the effects of inclined angle and oscillating revolution speed on the performance of size grading machine of Robusta green coffee bean using oscillating sieve with swing along width direction. When increasing the inclined angle from 4 to 6 degree, the weight purity index and the clogging sieve percentage were decreased. For the size grading efficiency, it found that the size grading efficiency was increased when the inclined angle increased from 4 to 5 degree. However, the size grading efficiency was decreased when increasing the inclined angle from 5 to 6 degree. When considering in term of oscillating revolution speed, the increase of oscillating revolution speed provided the decrease of weight purity index, size grading efficiency and clogging sieve percentage. The appropriate condition for using the size grading machine of Robusta green coffee bean using oscillating sieve with swing along width direction is the inclined angle of 5 degree and the oscillating revolution speed of 185 rpm.
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The Increase of Efficiency in Robusta Green Coffee Bean Size Sorting Machine by Response Surface Methodology
(2020-04-28)
Chanpaka, Watcharapong
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Srisang, Naruebodee
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Dangwilailux, Panya
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Chungcharoen, Thatchapol
One of the essential processes for producing the green coffee bean with Robusta variety is size sorting process because it is able to add the value of green coffee bean. The excellent size sorting can be done by using the size sorting machine. In this study, the size sorting machine with revolved sieve which provided the good distribution of green coffee bean was used and the three factors such as sorting angle, revolved speed and feed rate were investigated using Response Surface Methodology (RSM) based on a Central Composite Design (CCD). The optimum conditions of size sorting efficiency were revolved speed of 8.35 rpm, sorting angle of 5.05 degree and feed rate of 26.59 kg/h. These provided the size sorting efficiency of 75.15% with high correlating coefficient (R2 = 97.65). This indicated that the data predicted with Response Surface Methodology was good agreement and adequacy of models.
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One-Step Synthesis of Magnetic Biochar from Durian Shell Via K2FeO4 Activation for Lead Removal
(2024-01-01)
Pewpa, Orrawan
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Limmun, Warunee
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Ito, Ayumi
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Chungcharoen, Thatchapol
This study explores the synthesis and application of magnetic biochar derived from durian shell (MDS) for Pb(II) removal. MDS was synthesized through a one-step method using K<inf>2</inf>FeO<inf>4</inf> activation. The synthesized MDS was characterized using various analytical techniques, showing a high specific surface area and oxygen-rich functional groups. These characteristics have made it highly effective at adsorbing Pb(II). The initial pH and MDS dosage effects on Pb(II) adsorption were examined. The highest adsorption capacity of MDS for Pb(II) was found to be 87.43 mg/g, which was observed at pH 7 and MDS dosage of 1 g/L. The pseudo-second-order (PSO) model was found to be the best fit for the kinetics of Pb(II) adsorption, suggesting chemisorption. These results are expected to contribute to the development of effective, economical, and environmentally friendly solutions for wastewater treatment, mainly targeting Pb(II) contamination.
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Comparison between Linear and Nonlinear Machine-Learning Algorithms for Predicting the Properties of Biodiesel Using Near-infrared Spectra
(2023-01-01)
Thongphut, Chitwadee
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Chungcharoen, Thatchapol
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Phetpan, Kittisak
This study points out the application of nearinfrared (NIR) spectra combined with machine-learning approaches to evaluate biodiesel properties. The performance comparison between partial least squares regression (PLSR)-based linear and support vector regression (SVR)-based nonlinear machine-learning algorithms for predicting the biodiesel properties is the main objective of this paper. The models were built for four biodiesel properties: pH, viscosity, density, and water content. As a result, the PLSR had better performance than the SVR. An effective model of each biodiesel property prediction exhibited the coefficient of determination for the prediction (r2) and root mean square of prediction (RMSEP) of 0.89 and 0.01 mg KOH.g-1, 0.75 and 0.07 cSt, 0.84 and 2.77 kg.m-3, and 0.75 and 79.33 mg.kg-1 for pH, viscosity, density, and water content, respectively.
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Parboiled germinated rice production using a new method
(2020-09-08)
Chungcharoen, Thatchapol
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Onboon, Pornpit
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Sansiribhan, Sansanee
The process complexity is the main problem for parboiled germinated rice (PGR) production. The PGR production using the new method (germinating and drying using hot air fluidized bed combined with halogen lamp) can decrease the complexity of process and also provided the good quality of PGR when comparing with PGR production using traditional method (germinating, steaming and drying using hot air fluidized bed). The new method provided the higher drying rate, leading to faster decrease of moisture content and higher increase of grain temperature. This caused the lower whiteness index. It also provided the lower degree of gelatinization. However, the percentage of head rice yield of PGR with new method was not significantly different when comparing with PGR production using traditional method. For Specific Energy Consumption (SEC), the PGR production using the new method provided the lower SEC value than PGR production using traditional method.
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Testing and evaluation of banana (‘Kluay Lab Mue Nang’) wholesale packaging in Chumphon province, Thailand under transport simulation
(2019-01-01)
Ruttanadech, N.
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Saewanarak, A.
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Srisang, N.
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Chungcharoen, T.
This research evaluated the effects of foam packaging on wholesale packages of banana (‘Kluay Lab Mue Nang’) in Chumphon province, Thailand. The experiment was divided into 3 experimental sets, namely, 1) foam net (FN); 2) expanded polyethylene foam (EPE); and 3) controlled sample without use packaging (NOP) and damages were categorized into three types which were bruising, abrasion and laceration. Vibration tests were performed following the standard method of ASTM D999 Method A2 using the frequency of 4 Hz for one hour. Results revealed that the total damage of EPE (bruising, abrasion, and laceration) was higher than that of FN. When considering the percentage of damage area, it was found that the damage percentages of EPE caused by bruising and abrasion were 7.41 and 3.28%, respectively, and the damage percentages of FN caused by bruising and abrasion were 5.73 and 3.82%, respectively. There was no damage from laceration detected. The results showed that FN had the greatest reduction in damage. The controlled sample (NOP) had a total damage of 20.79%.
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Effect of heat pipe characteristics in the energy recovery ventilation system for positive pressure room
(2026-05-15)
Duangwana, Supaluek
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Chaiya, Wathanyu
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Laoariyawong, Anothai
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Chaimongkol, Jadsada
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Lapaphinya, Surasak
A system's high energy consumption is a drawback when it is used to create a positive pressure environment to reduce PM2.5. Air to air energy recovery ventilation systems (ERVs) using heat pipes are a feasible technology. This study aims to investigate the effect of installation patterns of heat pipes in air-to-air heat exchangers and the operating conditions of the system for generating a positive pressure environment. Flow characteristics of inline and staggered heat pipes with fins and without fins were investigated by using computational fluid dynamics. The different operating conditions varying inlet air temperature, air flow rate and heat pipe surface temperature were also studied. The results showed that the staggered heat pipes with fins introduced promising results. Outlet temperature was dominated by inlet air temperature and heat pipe surface temperature, while the pressure drop crossed ERV were relied on air flow rate. The promising results from the simulation were a guideline for constructing a practical heat exchanger that was integrated with positive pressure-generating equipment.
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Application of Centrifuge Combined with Biodiesel Washing Machine with Biochar in Biodiesel Production
(2025-01-01)
Fonghiransiri, Surasak
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Chungcharoen, Thatchapol
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Choola-aied, Orasa
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Limmun, Warunee
This research focused on the application of a centrifuge combined with a biodiesel washing machine with biochar in biodiesel production. This method aims to reduce the amount of biochar used in the washing process to meet biodiesel standards. Therefore, the research aimed to improve the biodiesel production process by using a centrifuge machine combined with the biochar washing method (CB) and comparing it with two methods: gravitational settling combined with water washing (GW) and gravitational settling combined with biochar washing (GB). The results indicated that the CB method could reduce contaminants in biodiesel. Although the biodiesel yield did not differ from the GB method, it remained higher than the GW method, increasing the biodiesel yield by up to 1.19% (90.24%). Furthermore, the CB method was more effective in removing acidity, water content, methanol, and glycerol in biodiesel compared to the GB method, with removal percentages of 63.88%, 79.49%, 99.70%, and 85.19% respectively. Consequently, this led to a decrease in viscosity (3.998 cSt) and density (865.93 kg/m<sup>3</sup>). This method provides biodiesel properties that meet biodiesel standards.

Chungcharoen, Thatchapol

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