King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology最新文献_第3页

Theoretical Analysis of Heat Recovery Performance Air to Water of a Heat Pipe Heat Exchanger (HPHE) 热管换热器空气对水热回收性能的理论分析

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2016-11-22 DOI: 10.14416/J.IJAST.2016.11.007

Y. Pakam, T. Soontornchainacksaeng

{"title":"Theoretical Analysis of Heat Recovery Performance Air to Water of a Heat Pipe Heat Exchanger (HPHE)","authors":"Y. Pakam, T. Soontornchainacksaeng","doi":"10.14416/J.IJAST.2016.11.007","DOIUrl":"https://doi.org/10.14416/J.IJAST.2016.11.007","url":null,"abstract":"The purpose of this report is to analyze the heat recovery of the Heat Pipe Heat Exchanger (HPHE) by using ethanol as the working fluid. Heat pipe heat exchanger consists of 90 tubes were placed in staggered arrangement and inside the heat pipes was contained a screen wick and a working fluid. These pipes have been divided into three zones, consisting of evaporation zone, adiabatic zone, condensation zone, in each of zone, has a length of 500 mm, 100 mm and 500 mm, respectively. The mathematical models of HPHE which were simulated in MATLAB have the hot air flowing to evaporation zone with temperature range of 423.15 to 498.15K, and the cold water flowing to the condensation zone with a constant temperature of 303.15K. The ratio of hot air heat capacity rates to water heat capacity rates (C*) are in the range of 0.50 to 1.50. The results showed that the C* is 1.50 and the hot air temperature of 498.15K to be provided the best temperature for an exit cold water flow. The heat transfer coefficient of the hot air flowing to evaporation zone is 99.66 W/m2.K as well as the heat flux of condensation zone is 23.226 W/m2. Furthermore, at C* = 0.50 and the hot air temperature inlet of 423.15K, showed the best effectiveness equal to 0.538. Therefore, the results of the HPHE simulation can be used to design for the boiler in distillery.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114605525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Forecasting the Price of Natural Rubber in Thailand Using the ARIMA Model 用ARIMA模型预测泰国天然橡胶价格

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2016-11-17 DOI: 10.14416/J.IJAST.2016.11.005

Sukanya Cherdchoongam, Vichai Rungreunganun

{"title":"Forecasting the Price of Natural Rubber in Thailand Using the ARIMA Model","authors":"Sukanya Cherdchoongam, Vichai Rungreunganun","doi":"10.14416/J.IJAST.2016.11.005","DOIUrl":"https://doi.org/10.14416/J.IJAST.2016.11.005","url":null,"abstract":"Objectives of this research are to create the model that can be used to forecast natural rubber price of Thailand with independent variables such as world natural rubber price, synthetic rubber price, Advance market price of Tokyo Commodity Exchange (TOCOM), consumption of natural rubber, production of natural rubber with Autoregressive Integrated Moving Average (ARIMA) model. The study is divided as 4 procedures; first is time series analysis for forecasting natural rubber price of Thailand. It was found that the ARIMA(1,0,1) model is most suitable that can be explained for variations of natural rubber price of Thailand for 94.54% with Mean Absolute Percentage Error (MAPE) of 5.923. the second step is ARIMA analysis for forecasting natural rubber price of Thailand together with independent variables, it was found that ARIMAX(0,1,1) was most appropriate with variation explanation of Thailand’s natural rubber price of 99.89% and MAPE of 1.11. The third step is model analysis to forecast independent variables and the last step is using values from independent variable forecast in the third procedure to forecast Thailand's natural rubber price.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126465516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Hydration and Physico-mechanical Properties of Blended Calcium Sulfoaluminate-belite Cement Made of Industrial By-products 工业副产物合成硫铝酸钙-白石水泥的水化及物理力学性能

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2016-11-17 DOI: 10.14416/J.IJAST.2016.11.006

A. Rungchet, P. Chindaprasirt, C. Poon, K. Pimraksa

{"title":"Hydration and Physico-mechanical Properties of Blended Calcium Sulfoaluminate-belite Cement Made of Industrial By-products","authors":"A. Rungchet, P. Chindaprasirt, C. Poon, K. Pimraksa","doi":"10.14416/J.IJAST.2016.11.006","DOIUrl":"https://doi.org/10.14416/J.IJAST.2016.11.006","url":null,"abstract":"Portland cement blended Calcium Sulfoaluminate-belite (CŜAB) cements were studied in order to improve its binding properties and workability for specific applications. The binders consisted of calcium sulfoaluminatebelite, Flue Gas Desulfurization-gypsum and Ordinary Portland Cement (OPC). In this research, effects of OPC contents (25, 50, 75 wt%) as a CŜAB replacement on hydration behaviors and physico-mechanical properties of the binders were observed. Used CŜAB cement was synthesized using industrial by-products viz., fly ash, Flue Gas Desulfurization-gypsum, Al-rich sludge as starting materials via hydrothermal-calcination method. The results revealed that the replacement of CŜAB cement with OPC extended the setting times of pastes. The reduction of hydration rate with higher OPC content was due to dilution of fast setting phases such calcium sulfoaluminate and mayenite. Hydration products of calcium sulfoaluminate cement were ettringite responsible for high early strength together with Al(OH)3. From 6 h onwards, hydration of tricalcium silicate phase from the OPC generated calcium silicate hydrate. Stratlingite was also found in low OPC content mix resulting from the reaction between the Al(OH)3 and either alite phase in OPC or belite phase in CŜAB cement. Ettringite could also react with Al(OH)3 to generate monosulfate at later ages. The calcium sulfoaluminate phase was mainly responsible for the early mechanical properties, while OPC played an important role to improve strength at later ages.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126829622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Fish Protein Hydrolysate Production by Acid and Enzymatic Hydrolysis 酸和酶水解生产鱼蛋白水解产物

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2016-11-11 DOI: 10.14416/J.IJAST.2016.11.004

Nicharee Wisuthiphaet, S. Klinchan, S. Kongruang

{"title":"Fish Protein Hydrolysate Production by Acid and Enzymatic Hydrolysis","authors":"Nicharee Wisuthiphaet, S. Klinchan, S. Kongruang","doi":"10.14416/J.IJAST.2016.11.004","DOIUrl":"https://doi.org/10.14416/J.IJAST.2016.11.004","url":null,"abstract":"The objective of this study was to optimize the condition for fish protein hydrolysate production from minced by-catch fish by using hydrochloric acid and 2 protease enzymes; Papain and Alcalase. Taguchi design and Central Composite Design (CCD) were applied for experimental design to evaluate the degree of hydrolysis. Response surface methodology was performed in order to determine the optimal production conditions. The optimal condition for acid hydrolysis was 4 mol/L of hydrochloric acid at 100 o C for 90 minutes which yielded 50.70% degree of hydrolysis. For enzymatic hydrolysis, Alcalase is the most suitable protease enzyme for fish protein hydrolysate production. The optimal condition was 6 % (w/w) Alcalase concentration at the temperature of 61.23 o C and the reaction time of 27.36 minutes resulting in 88.9% of degree of hydrolysis. Amino acid profiles of fish protein hydrolysates hydrolyzed under the optimal condition were analyzed by HPLC and the results showed that fish protein hydrolyzed by Papain had highest nutritional properties. Glutamic acid had the highest percentage (16.35%) followed by Aspartic acid (10.41%) and Lysine (8.48%).","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124165886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Artificial Intelligence Based First Order Adaptive Sliding Mode Controller for Position Control of a DC Motor Actuator 基于人工智能的一阶自适应滑模控制器在直流电机执行器位置控制中的应用

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2016-11-09 DOI: 10.14416/J.IJAST.2016.11.003

Nyong-Bassey Bassey Etim

{"title":"Artificial Intelligence Based First Order Adaptive Sliding Mode Controller for Position Control of a DC Motor Actuator","authors":"Nyong-Bassey Bassey Etim","doi":"10.14416/J.IJAST.2016.11.003","DOIUrl":"https://doi.org/10.14416/J.IJAST.2016.11.003","url":null,"abstract":"This paper presents an Artificial Intelligence (AI) based approach uniquely applied to Permanent Magnet DC motor actuator for position control. The AI method employed in this work is Fuzzy logic. A first order lag Sliding mode controller is tuned and combined with an Adaptive Fuzzy- PI controller architecture which operates in parallel. The controller architecture proposed in this study is aimed at improving the disturbance rejection capability, steady state as well as transient performance of the conventional Adaptive Fuzzy-PI controller and sliding mode controller. Hence, the robust control law of the proposed controller (SM+FZ-PI) consists of a discontinuous Sliding mode output added to a continuous Adaptive Fuzzy-PI controller output. The sliding mode controller switches on only when disturbance in the system is detected. The performance of the proposed controller architecture has been compared with a conventional PID and Adaptive Fuzzy-PI controllers for performance evaluation with respect to several operating conditions such as load torque disturbance injection, noise injection in feedback loop, motor non-linearity exhibited by parameters variation, and a step change in reference input demand. The proposed controller (SM+FZ-PI), had the best disturbance rejection and steady state error elimination.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124501927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Framework for Web-based Data Visualization using Google charts based on MVC pattern 基于MVC模式的基于web的数据可视化框架

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2016-11-07 DOI: 10.14416/J.IJAST.2016.11.002

Chanchai Supaartagorn

引用次数: 4

Lignocellulosic Biomass to Biofuel Production: Integration of Chemical and Extrusion (Screw Press) Pretreatment 木质纤维素生物质到生物燃料生产:化学和挤压(螺旋压机)预处理的集成

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2016-11-04 DOI: 10.14416/J.IJAST.2016.11.001

Wawat Rodiahwati, M. Sriariyanun

引用次数: 23

Effect of Strong Metal Support Interactions of Supported Ni and Ni-Co Catalyst on Metal Dispersion and Catalytic Activity toward Dry Methane Reforming Reaction 负载型Ni和Ni- co催化剂强金属负载相互作用对干甲烷重整反应金属分散和催化活性的影响

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2016-10-25 DOI: 10.14416/J.IJAST.2016.10.001

Korakot Piyapaka, S. Tungkamani, M. Phongaksorn

{"title":"Effect of Strong Metal Support Interactions of Supported Ni and Ni-Co Catalyst on Metal Dispersion and Catalytic Activity toward Dry Methane Reforming Reaction","authors":"Korakot Piyapaka, S. Tungkamani, M. Phongaksorn","doi":"10.14416/J.IJAST.2016.10.001","DOIUrl":"https://doi.org/10.14416/J.IJAST.2016.10.001","url":null,"abstract":"This work studied the effect of interaction between active metal species (Ni and Ni-Co species) and different support (Al2 O3-MgO and SiO2) on the catalyst properties and catalytic performance in dry methane reforming reaction. Supports were synthesized by sol-gel method, then the catalyst samples were prepared by incipient wetness impregnation with a salt solution of active metal(s). The fresh catalysts were characterized via Scanning Electron Microscopy (SEM), Temperature Programmed Reduction (TPR) and Temperature Programmed Desorption (TPD) techniques. Dry Methane Reforming (DMR) activities were tested in a conventional fixed-bed reactor at 620°C. The SEM images and H2-TPR results reveal that the Strong Metal Support Interaction (SMSI) takes place in the catalysts based on Al2 O3-MgO support. The metal dispersion and average metal particle size were evaluated using TPD results. It was found that a Ni-Co bimetallic catalyst provides higher metal dispersion and smaller average metal particle size than Ni monometallic catalysts due to the effect of metal-metal interaction. The bimetallic catalyst with weaker metal-support interaction improve the metal-metal interaction resulting in increasing higher metal dispersion. DMR test presented that sites of strong metal-support interaction enhanced CH4 activity. The stronger metal-metal interaction in Ni-Co bimetallic catalyst with SiO2 support promoted CO2 activity.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116943685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

A Multi-attribute Urban Metro Construction Excavated Soil Transportation Decision Making Model Based on Integrated Fuzzy AHP and Integer Linear Programming 基于模糊层次分析法和整数线性规划的多属性城市地铁开挖土运决策模型

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2016-07-14 DOI: 10.14416/J.IJAST.2016.05.004

W. Meethom, Titiwat Triwong

引用次数: 4

A Study of Cannonball Trees in Thailand: Hood Staminodes are Larger than Ring Stamens but only Germination of Staminal Ring Pollen can be Stimulated by Exogenous Sucrose 泰国炮弹树的研究:帽状雄蕊大于环状雄蕊，但外源蔗糖只能刺激雄蕊环花粉的萌发

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2016-06-29 DOI: 10.14416/J.IJAST.2016.06.003

K. Bodhipadma, S. Noichinda, Kiatphaibool Permchalad, Saranya Changbandist, Saowaros Phanomchai, Leupol Punnakanta, D. Leung

{"title":"A Study of Cannonball Trees in Thailand: Hood Staminodes are Larger than Ring Stamens but only Germination of Staminal Ring Pollen can be Stimulated by Exogenous Sucrose","authors":"K. Bodhipadma, S. Noichinda, Kiatphaibool Permchalad, Saranya Changbandist, Saowaros Phanomchai, Leupol Punnakanta, D. Leung","doi":"10.14416/J.IJAST.2016.06.003","DOIUrl":"https://doi.org/10.14416/J.IJAST.2016.06.003","url":null,"abstract":"The size of the staminodes and ring stamen of Couroupita guianensis (cannonball tree) grown in the Nonthaburi province, Thailand as well as some characteristics of their pollen were investigated. The staminodes were clearly larger than the ring stamens. This finding is at variance with other previous studies. Viability staining showed that almost all the cannonball tree pollen from hood staminode were not viable but about 85% of the ring stamen pollen were viable. When both types of cannonball tree pollen were cultured on modified Mercado medium, hood staminode pollen did not germinate whereas the sucrose concentrations in the medium had a promotive effect on germination of ring stamen pollen. About 65% of the ring stamen pollen germinated on the medium supplemented with 20% sucrose. These pollen studies were in agreement with other similar studies on cannonball trees, suggesting that the relative sizes of the male reproductive organs of cannonball trees may not be related to fertility of their pollen.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121880085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1