Kinnares V.,King Mongkut S Institute of Technology Ladkrabang |
Sawetsakulanond B.,Mahanakorn University of Technology
Energy Procedia | Year: 2013
This paper proposes characteristic requirements of a small scale squirrel cage induction generator for effective electricity generation from wind energy. These characteristics are obtained from modeling and testing results. Investigation into comparative performances between Standard and high efficiency induction generators is given in order to find out the characteristic requirements of a suitable induction generator. Performances of various features of the machine structure are given. The suitable design of the induction generator based on empirical rules is also included. The investigation of power loss of the induction machine both in theory using FEM (Finite Element Method) and tests has been made. In addition, static var (Volt-Ampere reactive power) compensator using power electronic control to keep terminal voltage of a self-excited induction generator constant is explained. These results can be guidelines for machine development and control method for effective electricity generation. © 2013 The Authors. Published by Elsevier.
Dachoupakan Sirisomboon C.,Chulalongkorn University |
Putthang R.,Chulalongkorn University |
Sirisomboon P.,King Mongkut S Institute of Technology Ladkrabang
Food Control | Year: 2013
The objective of this research was to apply the near infrared spectroscopy (NIRS), with a wavelength range between 950 and 1650 nm, to determine the percentage of fungal infection found in rice samples. The total fungal infection and yellow-green Aspergillus infection, which is often indicative of aflatoxigenic fungal infection, are the focus of this research. Spectra were obtained on 106 rice samples, by reflection mode, including 90 naturally contaminated samples, and 16 artificially contaminated samples. Calibration models for the total fungal infection were developed using the original and pretreated absorbance spectra in conjunction with partial least square regression (PLSR). The statistical model developed from the untreated spectra provided the greatest accuracy in prediction, with a correlation coefficient (. r) of 0.668, a standard error of prediction (SEP) of 28.874%, and a bias of -0.101%. For yellow-green Aspergillus infection, the most accurate predictive statistical model was developed using a pretreated (maximum normalization) NIR spectra, with the following statistical characteristics (. r = 0.437, SEP = 18.723% and bias = 4.613%). Therefore, the result showed that the NIRS could be used to detect aflatoxigenic fungal contamination in rice with caution and the technique should be improved to get better prediction model. However, there is an evident from NIR spectra that the moisture and starch content in rice affects the overall extent of fungal infection. © 2013 Elsevier Ltd.
Chaiyasoonthorn S.,Ramkhamhaeng University |
Hongyim N.,King Mongkut S Institute of Technology Ladkrabang |
Mitatha S.,King Mongkut S Institute of Technology Ladkrabang
ICCAS 2015 - 2015 15th International Conference on Control, Automation and Systems, Proceedings | Year: 2015
This paper purposed to implement long range data communication by using APRS protocol to send location with Radiation measuring of Geiger Counter system, conceptual that automatically collects data and send the entries packet to the internet stream and be able to pinpoint the location of the Autonomous Robot (while deploy around the radiation disaster area) via Online Maps, the main goal, expected to able to establish long distance data communication network between APRS Robot and Internet Gateway(I-Gate) approx radius of 10 Kilometers. © 2015 Institute of Control, Robotics and Systems - ICROS.
Khan-Ngern W.,King Mongkut S Institute of Technology Ladkrabang |
Zenkner H.,King Mongkut S Institute of Technology Ladkrabang
Advanced Science Letters | Year: 2015
This research proposes the preliminary study whether the power transmission is possible or not. The wireless power transmission using particular resonance technique with series resonance for transmission and parallel resonance for receiver has been proposed. The study is focused on the wireless power transmission on waterto- air mode on reversed osmosis water and various salt water concentrations. The transmitted power is up to 7 W at a frequency of 6.78 MHz across a distance in the range between 10 mm to 60 mm has been demonstrated. Finally, the effect of water type and the percentage of salt concentration on wireless power transmission attenuation are presented and analyzed. © 2015 American Scientific Publishers. All Rights Reserved.
Boonchom B.,King Mongkut S Institute of Technology Ladkrabang |
Baitahe R.,King Mongkut S Institute of Technology Ladkrabang |
Baitahe R.,King College |
Kongtaweelert S.,King College |
And 2 more authors.
Industrial and Engineering Chemistry Research | Year: 2010
Zinc phosphate (Zn3(PO4)2·4H 2O) was prepared by a simple route using ZnO and H3PO 4 in aqueous and acetone media at ambient temperature. Zn 3(PO4)2·4H2O decomposes to Zn3(PO4)2 by three dehydration reactions, as revealed by thermal analytical (TG/DTG/DTA) and differential scanning calorimetry (DSC) techniques. The synthesized Zn3(PO 4)2·4H2O and its dehydration product Zn3(PO4)2 were characterized by powder X-ray diffraction, Fourier transfer infrared, and scanning electron microscopy. Kinetic triplet parameters (activation energy, E; preexponential, A; Avrami exponent, n) and thermodynamic functions (ΔH*, ΔG*, and ΔS*) of three dehydration reactions are calculated by DSC experiments. Evaluation and control of the specific characteristics of three dehydration processes of Zn3(PO4)2· 4H2O are essentially important in the variously oriented studies, which were discussed from the viewpoints of thermal stability based on kinetics and thermodynamics. © 2010 American Chemical Society.