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Distributed Temperature Sensing and Real Time Thermal Rating for Underground Power Cable Monitoring
(2025-01-01)
Tangtheerajaroonwong, Wiroj
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Tanapornchinpong, Phiphat
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Kiatjaroonlert, Boonsak
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Khan-Ngern, Werachet
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Sangracha, Chanintorn
This paper presents the distributed temperature sensing (DTS) technology and its application mainly on underground power cables. The main measuring principle is detecting the back-scattering light via Raman scattering that varies and depends on temperature at each point of optical fiber. In this paper, the authors present the monitoring results that the load current is applied for 50% of the rated current of the 69 kV and 115 kV transmission cables, and the DTS detects temperature increasing 0.5°C from the ambient temperature. This paper also shows real time thermal rating for calculations of conductor temperature.
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Proposed Model of STEM Associated with Social Issues: Case Study on Tapioca Drip Irrigation System
(2021-01-01)
Roekrai, Nidchabendha Chandanachulaka
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Khan-Ngern, Werachet
The model of STEM associated with social issues is presented. Many projects are implemented with science, technology, mathematics, and engineering (STEM) but exclude the impact of long-term sustainability in both social and economic topics. The proposed model of STEM, which includes social matters, should be applied to be S+STEM. A case study of PV water pumps in the tapioca drip irrigation system has been provided to ensure the success of S+STEM. Although the design of irrigation systems requires STEM principles, it should be considered on issues related to society and communities, particularly about the cost and pollution that occur, which is a matter that the community values.
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Energy, Economic, and Environmental (3E) Analysis of PV Water Pump: Case Study of the Tapioca Drip Irrigation System
(2021-01-01)
Roekrai, Nidchabendha Chandanachulaka
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Khan-Ngern, Werachet
This paper presents energy, economic, and environmental analysis of the PV Water Pump. A case study of the tapioca drip irrigation system in Kamphaeng Phet Province in Thailand is provided. The conditions of this tapiocafield are 1) no electricity and 2) thefield owners are not willing to pay for the electricity cost; therefore, it is crucial to decide whether PV connected with α centrifugal pump is suitable for tapioca drip irrigation system. Each parameter in this 3E analysis has been evaluated to preset the most suitable PV pumping system.
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Energy, Economic, and Environmental (3E) Analysis of Zero Energy Consumption Building: A Case Study of Thai Style Mediation House
(2020-10-14)
Roekrai, Nidchabendha Chandanachulaka
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Khan-Ngern, Werachet
This paper presents Energy, Economic, and Environmental (3E) analysis of Zero Energy Consumption Building (ZECB) concept. A case study of Thai mediation house which constructed following ZECB concept is provided. The conditions of this off-grid PV house are daily load demand is approximately 4.605 kWh and this house must be able to use the energy for 2 days without the sunlight. Each parameter in 3E analysis is used to evaluate the possibility of ZECB.
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An HSC/battery energy storage system-based regenerative braking system control mechanism for battery electric vehicles
(2019-03-01)
Kiddee, Kunagone
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Keyoonwong, Wiwat
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Khan-Ngern, Werachet
This paper proposes a novel hybrid energy storage system (HESS) for the regenerative braking system (RBS) of the front-wheel induction motor-driven battery electric vehicle. The HESS is an amalgamation of multiple hybrid supercapacitors (HSCs) and lithium-ion battery cells. An artificial neural network (ANN)-based RBS control mechanism was used to optimize the switching scheme of the RBS's three-phase inverter and the vehicular breaking force distribution. In the regenerative braking mode, the ANN-based HSC/battery RBS transferred the braking energy to be stored in the HSC and, upon reaching the HSC's maximum safety threshold, then to the battery. In addition, the RBS control mechanism could achieve uniform braking force distribution between the front and rear wheels of the vehicle. Furthermore, our findings revealed that the experimental HSC/battery RBS program enhanced the harvesting of the regenerative braking energy, as was evident from the longer driving distance vis-à-vis that of the battery-only vehicle. The HSC/battery RBS also contributed to improved vehicle acceleration and an extended battery life. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
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Performance evaluation of regenerative braking system based on a HESS in extended range BEV
(2018-09-01)
Kiddee, Kunagone
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Khan-Ngern, Werachet
This paper proposed a regenerative braking system (RBS) strategy for battery electric vehicles (BEVs) with a hybrid energy storage system (HESS) driven by a brushless DC (BLDC) motor. In the regenerative braking mode of BEV, the BLDC motor works as a generator. Consequently, the DC-link voltage is boosted and regenerative braking energy is transferred to a battery and/or ultracapacitor (UC) using a suitable switching pattern of the three-phase inverter. The energy stored in the HESS through reverse current flow can be exploited to improve acceleration and maintain the batteries from frequent deep discharging during high power mode. In addition, the artificial neural network (ANN)-based RBS control mechanism was utilized to optimize the switching scheme of the vehicular breaking force distribution. Furthermore, constant torque braking can be regulated using a PI controller. Different simulation and experiments were implemented and carried out to verify the performance of the proposed RBS strategy. The UC/battery RBS also contributed to improved vehicle acceleration and extended range BEVs.
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PDLC film's energy consumption and performance for light filtration system
(2018-08-20)
Keyoonwong, Wiwat
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Khan-Ngern, Werachet
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Ruxsri, Paritpong Tavichaiyut Viritpol
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Raksasataya, Vishnu
This paper proposes to record the result of energy consumption and light transmission rate when using PDLC film with green insulated glass, at size lxl sq.m. with 6-12-6 mm. standard thickness. The result of energy consumption and performance in protecting from the sun light are explained. The PDLC energy consumption characteristic and its principle are described. The methodology to test the performance of PDLC film with green insulated glass also incuded. The result indicated that different voltage source level will also be able to affect the light transmission rate. From experiment found that at level 0 volt had a light transmission rate at 22.3 percent, level 15 volts at 28.8 percent, level 30 volts at 32.0 percent, level 45 volts at 33.2 percent, level 55 volts at 33.4 percent and level 70 at 34.0 percent, respectively. All of these values were compared with direct light intensity from outside. In the future, it can be used in purpose for energy saving inside building.
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Embedded Electronic Differential System on Two Brushless DC Motor Drives for Electric Vehicle Steering Control
(2018-08-20)
Khan-Ngern, Werachet
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Keyoonwong, Wiwat
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Chatsiriwech, Narongrit
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Sangnopparat, Pongsakorn
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Mattayaboon, Ponghiran
The project present about Embedded Electronic Differential System(EDs) on Two Brushless DC (BLDC) Motors Drives for Electric Vehicle Steering Control. EDs using for steering control to balance speed between two BLDC motors and enhances efficiency of electric vehicle driving system. Efficiency testing on BLDC motor driving system to determine the efficiency of BLDC motor driving system including inverter and BLDC motor at various load conditions. The maximum efficiency of BLDC motor at 48 volts is 75.71% with 6.52 kg load Embedded system including speed limit to protect BLDC motor from overrated speed and feedback speed, Handwriting coding by Arduino mega 2560. The steering control using digital potentiometer, MCP41010. When the turning angle of electric vehicle is any degrees (right or left turning status), the control system will command. And when BLDC motor near overrated speed and turning status, the overall speed of electric vehicle is reduced because the both BLDC motors speed are limited at 840 rpm. The experimental results give satisfactory performance.
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High performance BLDC motor control for electric vehicle
(2018-08-13)
Khan-Ngern, Werachet
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Keyoonwong, Wiwat
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Chatsiriwech, Narongrit
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Sangnopparat, Pongsakorn
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Mattayaboon, Ponghiran
This paper presents about design of high performance brushless dc motor (BLDC) control for electric vehicle (EV) which focusing on rear differential of electric car uses electronic control system or well known as electronic differential system (EDs). The advantage of EDs is help to adjust wheel speed while cornering by driving two BLDC motor attached to two rear wheels that two wheel speed is different. This system can accurately control process by monitoring output and feeding some of it back to compare actual output with desired output so as to reduce the error. It is well known as closed loop control system. The speed of BLDC is experimentally measured by a tachometer. The steering angle and speed of EV is calculated by equations derived from Ackemuuui-Jesntsnd model using Arduino. Load simulation using MATLAB Simulink. The experimental results electronic differential using will enhances efficiency of electric vehicle driving system.
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Design of zero energy consumption system for small DC residential home based on off-grid PV system
(2018-01-01)
Chandanachulaka, Nidchabendha
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Khan-Ngern, Werachet
This research presents the design of a zero energy consumption system (ZECS) based on off-grid photovoltaic (PV) system for small DC system whose load demand is less than 1 kWh/day. This system consists of 3 parts: 300 W PV panel, energy conversion or solar charger, and 12 V 200 Ah energy storage. The used electrical utilizing system consists of 3 types: 20 W LED lighting system, 35 W fan for air cooling system, and 100 W electrical boiler or heating system, whose average load requirement is 0.795 kWh/day. This research defines 6 key sustainability parameters and key performance indicators in order to evaluate the benefits of ZECS, which are design, energy security, system availability, efficiency, environment and investment. The result has been analyzed and it was found that ZECS can achieve more than 80% of the energy conversion efficiency and it can operate for 2 days without charging the battery. The battery charging and discharging from PV are demonstrated to confirm ZECS energy security. The utilization ratio or the energy that required per one square meter is less than 50 Wh/m2. DC ZECS and DC electric appliances are available, affordable and easy to be maintained. ZECS is designed in order to provide the electricity for low-income people in remote areas, and its social benefits are more important than the return on investment. It can be concluded that DC utilizing system is reliable for ZECS which can benefit to apply this system in remote area where it cannot connect to the grid.

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