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All Journal Mechatronics, Electrical Power, and Vehicular Technology The Indonesian Journal of Computer Science
Latt, Aung Ko
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Computer Science & IT Electrical & Electronics Engineering Engineering

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Optimization of load frequency control using grey wolf optimizer in micro hydro power plants Novendra, Irvandy Ilza; Wirawan, I Made; Kusumawardana, Arya; Latt, Aung Ko
Journal of Mechatronics, Electrical Power, and Vehicular Technology Vol 14, No 2 (2023)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/j.mev.2023.v14.166-176

Abstract

Micro hydro power plants (MHPP) is one of the renewable energy that can be utilized as a distributed generation with controllable power output. One common issue in MHPP systems is the non-constant rotation of the generator caused by load fluctuations. This instability leads to variable frequencies, which can potentially harm electrical equipment. To address this problem, the volume of water entering through the governor can be adjusted to synchronize the turbine and generator rotation with the load. This approach helps dampen frequency oscillations and ensures that the system operates within desired limits. Therefore, there is a need for technology that can enhance the performance of micro hydro power plant units, specifically load frequency control (LFC). This research proposes the application of the grey wolf optimizer (GWO) algorithm to optimize the PID controller parameters for MHPP LFC. MHPP has been modeled in both isolated and grid-connected modes using Simulink MATLAB R2020a. The best cost function value for an isolated mode system was obtained with ISEim, yielding a value of 0.067653, while for a grid-connected mode system, it was achieved with ISEgm, with a value of 0.015861. The results of the frequency deviation response performance of the LFC using GWO indicate that the fastest settling time was achieved with the cost function ITAEim in isolated mode, and with IAEgm in grid-connected mode. The cost function that produces the smallest peak overshoot and peak undershoot parameter values varied depending on changes in the system load.
Finite Element Analysis of Spur Gear Set in Noodles-making Machine Using Different Materials and Face Widths Thin, Po Po; Win, Htay Htay; Soe, Aung Kyaw; Latt, Aung Ko
The Indonesian Journal of Computer Science Vol. 13 No. 2 (2024): The Indonesian Journal of Computer Science (IJCS)
Publisher : AI Society & STMIK Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33022/ijcs.v13i2.3929

Abstract

This paper focuses on the design and structural analysis of a spur gear set for a noodles-making machine by changing three different materials (ASTM A 536, ASTM A 220, and AISI 1020) and gear face widths. Gear corrosion occurs at contact points as a result of bending stress and contact stress. This is the major source of the gear failure of the noodles-making machine. Pitch diameters of 50mm and modules of 5mm spur gears are selected in the design of the roller gear set. In theoretical analysis, the AGMA contact stress equation was used based on the Hertzian theory. The minimum von Mises stress and effective strain are found on AISI 1020 carbon steel by using ANSYS 17.0 software. In this paper, von Mises stress and effective strain are analyzed by changing the face widths of spur gear set to 8mm, 10mm, 12mm, 14 mm, and 16mm and using finite element analysis (FEA). Although all face widths are safe for this design, 12mm is chosen in this paper due to power consumption and strength points of view.
Numerical Analysis of Flow Velocity and Performance Test of Cross-Flow Turbine (500 W) Kyaw, Sandar; Swe, War War Min; Soe, Aung Kyaw; Latt, Aung Ko
The Indonesian Journal of Computer Science Vol. 13 No. 3 (2024): The Indonesian Journal of Computer Science (IJCS)
Publisher : AI Society & STMIK Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33022/ijcs.v13i3.4175

Abstract

The purpose of this study is to analyze the flow velocity and assess the performance of a cross-flow turbine through numerical simulations and performance tests. Using computational fluid dynamics (CFD), the flow patterns and velocity distributions around the turbine blades to gain insights into the turbine's hydrodynamic behavior. In the experimental phase, constructed a prototype of the cross-flow turbine and tested it in a water flume, measuring key performance metrics such as power output and efficiency.The test were performed under design flow condition. The numerical results were validated with performance tests. The numerical analysis revealed critical areas of flow separation and turbulence, which were consistent with the observed experimental data.
Experimental Investigation of Heat Transfer in Automotive Radiator Using CuO Nanofluids Myo, Aye Aye; Latt, Aung Ko; Swe, War War Min; Soe, Aung Kyaw
The Indonesian Journal of Computer Science Vol. 13 No. 4 (2024): The Indonesian Journal of Computer Science (IJCS)
Publisher : AI Society & STMIK Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33022/ijcs.v13i4.4188

Abstract

This paper focuses on the thermal analysis of an automotive radiator within the content of an engine cooling system. The cooling system plays a crucial role in regulating the temperature of a car’s engine. One of the essential components of the car’s cooling system is the cooling fluid. An efficient cooling system is vital in preventing engine overheating and ensuring the vehicle operates at its optimal performance level. A range of different approaches can be utilized to enhance heat transfer performance. To enhance heat transfer in radiator design, increasing the number of fins is a common approach, but this method has limitations, and current technology has already maximized its effectiveness. Nanofluid has been identified as a potential candidate for the automobile sector. Compared to water and water-ethylene glycol mixtures, the heat transfer coefficient of the nanofluid is significantly higher. This thesis investigates the performance of copper oxide nanofluids when mixed with a base fluid. In this study, the outlet temperature of copper oxide nanofluid is compared with ethylene glycol coolant in an automobile radiator. The nanofluid is tested at five different volume concentrations ranging from 0.1to0.5%.
Fabrication and Performance Evaluation of Rice Polishing Machine Win, Thida; Win, Htay Htay; Latt, Aung Ko
The Indonesian Journal of Computer Science Vol. 13 No. 4 (2024): The Indonesian Journal of Computer Science (IJCS)
Publisher : AI Society & STMIK Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33022/ijcs.v13i4.4347

Abstract

This paper focuses on the fabrication and performance evaluation of rice polishing machine. The motor power of the machine is 1.5 hp and rotational speed is 1440 rpm. This motor uses v-belt transmission system to drive the main shaft and blower shaft. The number of two belts are used in this transmission system. The diameter of the main shaft is 22mm. ASME code equation is used to design the main shaft for rice polishing machine. Square key is used and shear and torsional strength of the key are 58.5404MPa. Single-row deep groove ball bearing is selected for left and right bearing of main shaft. The average milling efficiency, broken efficiency and milling capacity and moisture contents for existing and modified blade were compared. The average milling capacity is 35.23 kg/h, 38.41 kg/h and 41.76 kg/h with modified blade and 30.35 kg/h, 32.20 kg/h and 34.03 kg/h with existing blade at the moisture condition of 13%, 12% and 11%, respectively. As comparison results, the modified blade of the machine has more efficient and convenience than the existing blade of the machine.
Co-Authors I Made Wirawan Kusumawardana, Arya Kyaw, Sandar Myo, Aye Aye Novendra, Irvandy Ilza Soe, Aung Kyaw Swe, War War Min Thin, Po Po Win, Htay Htay Win, Thida