DSpace Repository :: Browsing by Author "Sungchil Lee"

Browsing by Author "Sungchil Lee"

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Analyzing the structural integrity and performance of the safety railings(guardrail) system on the Nalaikh-Ulaanbaatar road
(German Mongolian Institute for Resouce and Technology, 2024-05-10) Dashdavaa Tuvshintur; Sungchil Lee; Odbileg Norovrinchen
Road traffic accidents along the Nalaikh-Ulaanbaatar road have raised significant concerns about the safety measures in place, particularly the effectiveness of the safety railings. This thesis explores the structural integrity and performance of these railings with an aim to enhance road safety and mitigate accident severity. Through a combination of field assessments, consultations with local authorities and road safety experts, and a thorough literature review on global safety railing standards, this research evaluates the current railings' condition and their compliance with safety norms. The findings indicate that while the railings meet certain Mongolian national standards, they are inadequate in terms of reducing the impacts of road accidents due to deficiencies in design, maintenance, and material resilience. Consequently, this study proposes a set of improvements, incorporating advanced international practices in safety railing design and stricter maintenance schedules. These enhancements are intended to provide robust support in preventing vehicles from veering off the road, ultimately leading to a safer commuting experience along this vital artery. The recommendations put forth by this thesis are expected to contribute significantly to the national discourse on road safety improvements and set a precedent for future infrastructure projects in Mongolia.
Automation of coal briquette-fuel fired stove for gers
(German Mongolian Institute for Resouce and Technology, 2022-05-16) Enkhmanlai Khuyagbaatar; Odbileg Norovrenchin; Sungchil Lee
Over the past few decades, there has been a consistent growth in the use of stoves for heating in a traditional Mongolian house, so called Ger. The main objective of this research is to implement automation of the existing stove in technical and environmental perspectives and to minimize human manual activities when they use the coal briquette fuel stove.
Creating and Improving a Product Model with Simulation and Topology Optimization
(German Mongolian Institute for Resouce and Technology, 2023-05-10) B. Ariunsanaa; Sungchil Lee; N. Battulga
Computer-Aided Design (CAD) simulation and topology optimization are widely used in mechanical product design and are considered to be important tools in the development process. These technologies have advanced significantly in recent years and are now capable of simulating complex scenarios, optimizing designs, and providing valuable insights into product performance.
Damage Simulation of Wind Turbine Tower and Effects on Modal Parameters
(German Mongolian Institute for Resouce and Technology, 2022-05-16) Tuvshintugs Munkhbat; Sungchil Lee; Odbileg Norovrenchin
Renewable energy is valued worldwide, natural resources are finite and CO2 emissions are accelerating global warming. The wind energy farm is seen as a viable renewable energy source in Mongolia since the country's unique topography makes wind energy feasible. Mongolia has various wind energy farms, which follow the global trend. The wind turbine tower, which is typically slender, is regularly subjected to high wind loads and is vulnerable to a variety of hazards. Because the breakdown of a wind turbine tower causes the entire turbine to collapse, it is critical to identify any expected tower damages and their impacts on structural soundness in advance so that the structure's owner can take measurements to prevent additional damage.
Design of chassis of three wheeled robot
(German Mongolian Institute for Resouce and Technology, 2023-05-18) Munkhgerel Oyunbileg; Odbileg Norovrenchin; Sungchil Lee
This comprehensive study focuses on a three-wheel tadpole configuration consisting of two front wheels and one rear wheel. The research aims to analyze the structural stability of this vehicle design and present a reliable design methodology. To achieve this, a combination of analytical and mathematical approaches was employed throughout the design phase. Advanced software tools, such as Fusion 360, allow for seamless designing and assembly of the vehicle, and the models created were subsequently imported into SolidWorks for further analysis using Finite Element Analysis (FEA) techniques.
Design of the Electric Load Carrying Platform
(German Mongolian Institute for Resouce and Technology, 2023-05-15) Tuguldur Sumiya; Odbileg Norovrenchin; Sungchil Lee
The electric load carrying platform is an essential tool for material handling applications, designed to reduce the physical strain and risk of injury associated with moving heavy loads. This thesis focuses on the design principles and techniques for electric load carrying platforms, with the goal of improving their functionality, usability, and safety.
Developing sensor-based solution for indoor air quality enhancement
(German Mongolian Institute for Resouce and Technology, 2024-05-27) Enkhsanaa Bayarsaikhan; Sungchil Lee; Odbileg Norovrinchen
These days, natural variables such as temperature, air quality, and parts per million (PPM) are crucial to the standard of living. Individuals spend roughly 90% of their time inside, whether in homes, workplaces, or other sorts of buildings, concurring with the discoveries of numerous studies. The indoor air quality (IAQ) in these spaces affects our efficiency, health, and wellbeing. However, IAQ regularly does not get the consideration, driving to situations that can altogether affect human wellbeing.
Development of road dust filter to be attached on a public bus in Ulaanbaatar
(German Mongolian Institute for Resouce and Technology, 2019-05-01) Baljinnyam Guntevsuren; Sungchil Lee; Odbileg Norovryenchin
This thesis work focused on road dust reduction in Ulaanbaatar by filtering. It searched for ways to reduce the airborne with the filter attached on public bus operated in Ulaanbaatar city. The road dust contains the PM10 and PM2.5 which are one of the dangerous materials in air pollution and can affect human health. The airflow around a public bus was simulated by ANSYS CFD software. ANSYS Workbench 19.2 can simulate the with the pressure distribution around the bus, velocity streamlines and drag force. ANSYS has some fluid flow solvers which are fluent and CFX. In this study, CFX solver used to get an accurate result. The airflow around the public bus of the wind could predicted by ANSYS computer fluid dynamics. Thesis main purpose of this study was collecting road dust from several locations within the filter. There are two methods used for collecting the dust sample. First ones were dust collected from the specific locations without the filtering and another one was road dust collected with the filter to be attached on public bus. Filter (activated carbon air filter) was attached back of public bus with the additional motor, because this location is more efficient way to collecting dust from the air. The motor principle was just sucking the air into the air filter. This motor was working two weeks (186 hours). Each weeks had different way to sucking the air (inlet of the motor). First week 30g and next week 125g of PM2.5 was collected.
Enhancing Agricultural Efficiency and Sustainability through Robotic Arm Automation
(German Mongolian Institute for Resouce and Technology, 2024-05-10) Batsukh Tsogt; Sungchil Lee; Odbileg Norovrinchen
With the growth of population, the needs of humanity are constantly on the rise, and agriculture in the twenty-first century is facing numerous unprecedented challenges. These include shortages in human labour, a reduction in land fertility due to climate change, and decrement in fertile land caused by urbanization. Due to its seasonal nature, it is not uncommon in the agriculture industry to have fluxations in the workforce. There is typically a specific window of time for harvesting most crops, and some delicate crops, like asparagus, strawberries, or cherries have a very short window where they’re at their peak quality for harvest. When there are not enough workers to pick up, it causes shortages in food demand, food waste, and many more. The USDA estimates post-harvest food loss, including fruits and vegetables, in the US to be around 30-40%. Labour shortages are believed to be a major contributor to this waste.[4] Addressing these challenges will necessitate a shift away from reliance on human labour. Instead, it calls for innovative methods to deliver consistent, efficient output. Automating repetitive harvesting tasks frees up human labour for higher values, such as reduced waste and labour costs and improved efficiency and product quality. Robotic arms with inbuilt cameras can detect ripeness, allowing for careful selection and minimizing damage to the fruit. They can operate 24/7, leading to faster harvests and thus reducing waste. Also, gentler handling by robots compared to manual picking can minimize bruising and blemishes, leading to higher-quality produce. The aim of this project is to design such a robotic arm, focusing on its model and structure that is best suited for agriculture.
Fatigue Strength Estimation Based on the Maximum Likelihood Method
(2023) Sungchil Lee; Odbileg Norovrinchen; Chinguunbileg Sumiyadorj
Fatigue strength is one of the core principles for designing mechanical components. It has been a constant concern for engineers, as mechanical failure occurs due to loading exceeding the fatigue strength. This concern has led to a necessity to develop new approaches to estimate the reliability of mechanical components. The conventional method that is used to test fatigue strength is the staircase method. However, the staircase method’s ability to calculate fatigue strength is potentially unreliable. The bias and scatter associated with fatigue testing shows the limitations of fatigue strength estimation when the staircase approach is used. The conventional methods of fatigue limit determination also have key flaws, in that they are subjective, time consuming, and costly. This research aims to develop a method that would reliably estimate the fatigue strength of materials, whilst using a lower amount of test results. The present study is intended to formulate and analyze a proposed method of estimating fatigue strength by utilizing a smaller number of tests. The aforementioned method that this paper aims to formulate, mainly focuses on a probabilistic estimation based on the Maximum Likelihood Procedure. The proposed method is applied to existing fatigue test data and its effectiveness is compared with other methods.
Fatigue Strength Estimation Based on the Maximum Likelihood Method
(2023) Sungchil Lee; Odbileg Norovrinchen; Chinguunbileg Sumiyadorj
Fatigue strength is one of the core principles for designing mechanical components. It has been a constant concern for engineers, as mechanical failure occurs due to loading exceeding the fatigue strength. This concern has led to a necessity to develop new approaches to estimate the reliability of mechanical components. The conventional method that is used to test fatigue strength is the staircase method. However, the staircase method’s ability to calculate fatigue strength is potentially unreliable. The bias and scatter associated with fatigue testing shows the limitations of fatigue strength estimation when the staircase approach is used. The conventional methods of fatigue limit determination also have key flaws, in that they are subjective, time consuming, and costly. This research aims to develop a method that would reliably estimate the fatigue strength of materials, whilst using a lower amount of test results. The present study is intended to formulate and analyze a proposed method of estimating fatigue strength by utilizing a smaller number of tests. The aforementioned method that this paper aims to formulate, mainly focuses on a probabilistic estimation based on the Maximum Likelihood Procedure. The proposed method is applied to existing fatigue test data and its effectiveness is compared with other methods.
Improvement of automated coal briquette-fuel fired stove
(German Mongolian Institute for Resouce and Technology, 2023-05-16) Anudari Tsogbadrakh; Odbileg Norovrenchin; Sungchil Lee
This thesis presents a study on the automation of a fuel-fired coal-briquette stove, aimed at improving the stove's performance and finding alternative solutions to its existing design. The need for improvement arises from the stove's failure to work properly, specifically in terms of its efficiency, safety, and environmental impact.
Improvement of efficiency of wool shredder
(German Mongolian Institute for Resouce and Technology, 2023-05-01) Temuulen Gurragchaa; Odbileg; Sungchil Lee
The main objective of this thesis is to examine the current performance of a wool shredding machine and to increase potential improvements that could enhance its efficiency and capacity. Despite the constraints that limitations to the existing machine for example frame of the machine, rotor diameter, bearing, and shredding chamber size, this study identifies and explores various restrictions within these parameters.
Improvement of fuel consumption flowmeter
(German Mongolian Institute for Resouce and Technology, 2023-05-10) Ariuntsetseg Uyanga; Odbileg Norovrinchen; Sungchil Lee
The fuel consumption flowmeter thesis aims to select the mass measurement method from the many instruments, equipment, and methods used to measure fuel consumption and to study its concept, techniques, and implementation. When fuel consumption is one of the most critical issues, it is essential to develop a way to measure it. GMIT also faced the same problem and raised the issue of reducing fuel consumption and saving.
Improvement of fuel consumption flowmeter
(German Mongolian Institute for Resouce and Technology, 2023-05-10) Ariuntsetseg Uyanga; Odbileg Norovrinchen; Sungchil Lee
The fuel consumption flowmeter thesis aims to select the mass measurement method from the many instruments, equipment, and methods used to measure fuel consumption and to study its concept, techniques, and implementation. When fuel consumption is one of the most critical issues, it is essential to develop a way to measure it. GMIT also faced the same problem and raised the issue of reducing fuel consumption and saving. This research paper covers the theory behind the flowmeter system, working principles, experimental results, and applications. It will also briefly present other flow measurement methods. The main goal is to design a meter that accurately measures the mass of fuel at a given time of immobility, conduct experiments, make conclusions, and make suggestions for improvements. The measuring system will use advanced techniques such as load sensors, microcontroller boards, and load cell amplifiers. Overall, this thesis focuses on the study, mass testing, and improvement of flowmeter technology. As a result, I plan to contribute to solving the problems faced by GMIT.
Preventive and Predictive Maintenance for Heavy-duty Machinery
(German Mongolian Institute for Resouce and Technology, 2022-05-16) Khatansaihan Sainbileg; Sungchil Lee; Munkh-Erdene Lkhagvasuren
Research into the maintenance management of the mining industry and equipment maintenance is scant, despite the increased mining operation and productivity in recent years. In this paper the appropriate maintenance method for the subsystems of tracked dump truck and overall equipment is accomplished, by combining several maintenance analysis tools is. The maintenance data were processed using Pareto analysis technique, which assumes that 80% of a project's benefit may be realized by completing 20% of the work—or, conversely, that 80% of issues can be traced back to 20% of the causes. Pareto analysis is a used as a useful technique for evaluating quality and making decisions in this thesis. The target truck is decomposed into subsystems and historical data is collected and analyzed using failure analysis tools to evaluate the right maintenance plan. Since the data is very broad, the more accurate results can be achieved by breaking down the subsystem into smaller components level and analyzed. The results obtained from subsystem analysis proved that the proposed method is applicable to the truck maintenance in component level.
Probabilistic Estimation of Fatigue Strength based on the Maximum Likelihood Procedure
(German Mongolian Institute for Resouce and Technology, 2021-05-07) Chinguunbileg Sumiyadorj; Sungchil Lee; Odbileg Norovrenchin
Fatigue strength is one of the core principles for designing mechanical components. It has been a constant concern for engineers, as mechanical failure occurs due to loading exceeding the fatigue strength. This concern has led to a necessity to develop new approaches to estimate the reliability of mechanical components. The conventional method that is used to test fatigue strength is the staircase method. However, the staircase method’s ability to calculate fatigue strength is potentially unreliable. The bias and scatter associated with fatigue testing shows the limitations of fatigue strength estimation when the staircase approach is used. The conventional methods of fatigue limit determination also have key flaws, in that they are subjective, time consuming, and costly. This research aims to develop a method that would reliably estimate the fatigue strength of materials, whilst using a lower amount of test results
Production Process Design of The Air-packed Insulator which is made of recycled plastic
(German Mongolian Institute for Resouce and Technology, 2023-05-16) Batbayar Altanbagana; Sungchil Lee; Norovrinchen Odbileg
This thesis explores the creation of an innovative, eco-friendly, and energy-efficient insulation approach for traditional Mongolian Gers, utilizing recycled plastic as the main component for air-packed insulators. Given the distinct insulation challenges associated with Mongol Gers, including energy use and environmental repercussions, the research seeks to address these concerns by examining the feasibility of recycled plastic materials in developing air-packed insulators that can bolster the thermal efficiency of Gers, diminish heating expenses, and support environmental sustainability.
Production Process Design of The Air-packed Insulator which is made of recycled plastic
(German Mongolian Institute for Resouce and Technology, 2023-05-16) Batbayar Altanbagana; Sungchil Lee; Norovrinchen Odbileg
This thesis explores the creation of an innovative, eco-friendly, and energy-efficient insulation approach for traditional Mongolian Gers, utilizing recycled plastic as the main component for air-packed insulators. Given the distinct insulation challenges associated with Mongol Gers, including energy use and environmental repercussions, the research seeks to address these concerns by examining the feasibility of recycled plastic materials in developing air-packed insulators that can bolster the thermal efficiency of Gers, diminish heating expenses, and support environmental sustainability. The investigation concentrated on refining design parameters, manufacturing methodologies, and conducting a theoretical evaluation of the air-packed insulator's performance. The proposed insulator demonstrated effective insulation capabilities, ease of installation, storage, and transportation, making it a pragmatic and cost-efficient solution for Gers. The insulator's compatibility with the unique curved lattice wall structure of Gers ensures proper insulation and a tailored fit for different Ger sizes. Employing recycled plastic encourages environmental sustainability by repurposing plastic waste and decreasing the need for new materials. The production process showcased a dedication to sustainable and environmentally conscious practices. The study assessed potential energy conservation, cost reduction, and environmental advantages, emphasizing the substantial potential of the air-packed insulator as a suitable insulation solution for traditional Mongol Gers. Future research avenues include further optimization of design parameters, experimental validation, life cycle analysis, and the incorporation of renewable energy sources. This thesis contributes to the advancement of a sustainable and energy-efficient insulation strategy that can enhance living conditions for Mongol Ger residents while reducing environmental consequences.
Real-time volumetric measurement of grinding media of SAG mill
(German Mongolian Institute for Resouce and Technology, 2020-06-08) Nauryzbyek Byekyetkhan; Munkhbaatar Purevdash; Ariunbolor Purvee; Sungchil Lee
This research work aimed to investigate the “Real-time volumetric measurement of grinding media of semi-autogenous (SAG) mill” by using an online-based model. Oyu Tolgoi (OT) mine copper concentrator is located in South Gobi province, south part of Mongolia. SAG mills are often taken as the object of optimization studies because they are a type of equipment that consumes large amounts of energy. Its size reduction stage includes one primary crusher which feeds two SAG mills (11.58m diameter x 7m length) with the following three ball mills (7.32m diameter x 11.32m length). After sag mill, comminuted products pass through a trommel screen in which over and undersize materials its oversize part is circulated into SAG mill and undersize part is conveyed to hydro-cyclone to further process.

Browsing by Author "Sungchil Lee"

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