U-Tapao, Chalida
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U-Tapao, Chalida
Alternative Name
U-tapao, Chalida
U-Tapao, C.
U-tapao, C.
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Email
chalida.ut@kmitl.ac.th
16 results
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Item type:Publication, A Design and Construction of a Wind Tunnel for Engineering Laboratories(2018-08-14); Moryadee, SeksunThe propose of this research is to demonstrate a design and construction of a wind tunnel for engineering laboratories in order to study the principles and control wind speeds in the wind tunnel. In an experiment in aerodynamics and engineering, we found that diffuser must have a length equal to or more than twice the length of the test in order to prevent the turbulent flow in the test area. The wind speed control system uses Inverter to control a 3-phase frequency of electricity supplied to air blower. In the experiment, the frequency was adjusted in the range from 20.00 to 50.00 Hz. Experiment results show that wind speeds during the test area are in the range of 14.50 to 38.50 meters per second, and the relationship between frequency (Y) and wind speed (X) during the test is linear as follows: Y = (0.7945 × (X-20)) + 14.629. The maximum pressure is 90.31 kilograms per square meter. This wind tunnel can be used to design buildings with a maximum height of 20 meters according to the Bangkok Metropolis Building Control (2001). - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A multi-period linear programming model for the natural gas distribution network of Thailand(2022-01-01); As a consequence of the impending gas shortages from sources in the Gulf of Thailand, the country will be obliged to switch to imports of LNG to achieve energy security. The gas system of Thailand is constructed as a mathematical model. In the simulation, the output shows that reserves gas of Thailand is insufficient to face the demand in 2015–2036, while the consumption of natural gas reserves continues at a rate that indicates that LNG imports will become the primary supply in the future to meet rising demand. The linear programming approach indicates patterns in the supply of gas which will see imports of LNG expanding at a rate lower than that predicted in the plan, thus undercutting the figures for the 2021 MMSCFD under the Gas Plan. The programming described in this study, however, may serve as the foundation for further examinations of Thailand’s situation regarding energy security. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, LNG Portfolio Diversification Optimization Model of Thailand(2023-01-01); With the increase of reliance of LNG for Thailand, tons of liquefied natural gas (LNG) are imported, however there is no report that describes the engagement by a mathematical model. This study constructed a mathematical model to analyze LNG supply of Thailand. Based on the outcome in 2022, the offered LNG supply pattern, which reduced the total LNG price, risk of politics and risk of maritime, exhibited that Malaysia, Brunei, and Australia are LNG exporter of Thailand. Additionally, when the demand of LNG in Thailand increase, the demand from Qatar does not increase due to the low competitiveness. Moreover, in the study of diversification, the details suggested the raking of suppliers that Thailand should import. The rank is as follows: Brunei, Malaysia, Australia, USA, and Trinidad & Tobacco. The study of the objective factors on the decision of Thailand shows that the risk associated with shipping is ineffective to Thailand’s LNG supply due to the geographical closeness of the supplier countries. However, the risk connected to the political of supplier nations is influenced by the decision of the supply. Furthermore, this study revealed the limitation of the research associated with the LNG supply of Thailand. Hence, the finding of this study not only presented the alternative policy of Thailand but also consolidated Thailand’s energy security. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optimization-Based Train Timetables Generation with Demand Forecasting for Thailand High Speed Rail System(2021-09-01); ; ; ; Suwannatrai, ArkomIn this paper, we propose a timetable optimizer (TO) consisting of the following parts: 1) Demand Forecasting Module 2) Train Optimization Module 3) Timetable Generator Module. TO is a specialized system for planning the train timetable which designed to help solve the problem of determining the number of trains that are suitable and scheduling the train suitably according to the number of trains designated by the system. TO integrates the passenger data from the latest round trip or historical information and forecasts a number of passengers of high-speed trains based on historical data in order to find the optimal number of trains by using a mixed integer programing model. Lastly, the TO system can applies the number of trains to calculate the appropriate train schedule so that the planning cycle is complete. A case study of high-speed railway system in Thailand with 36 trains to satisfy demand of 35,000 passengers/ each direction is conducted. The results show that the proposed system can quickly generate a timetable having an optimal number of train with suitable time interval according to a demand forecasting. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Optimal Prediction of Effectiveness of Mangrove Forest Against Coastal Erosion: Case Study of Coastal Area along the Gulf of Thailand(2024-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A Multi-Objective Optimization Model for Solid Waste Disposal Under Uncertainty: A Case Study of Bangkok, Thailand(2017-03-01); This paper has applied operation research to solid waste disposal by which two objective functions are optimized to minimize the expected operational costs (maximize revenues) and the expected net carbon dioxide equivalent (CDE) emissions. Types and uncertain amounts of solid wastes as well as costs of electricity were factored into the selection decision of solid waste disposal, i.e., landfill, incineration, composting and recycling. An optimization model was applied to the solid waste disposal of Bangkok, Thailand. In addition, a multi-objective optimization technique was proposed for a trade-off decision-making between minimum operational costs and CDE emissions. Composting and landfill are effective alternatives for Bangkok’s solid waste disposal system. The operational costs and net CDE emissions are highly correlated with the quantity of solid waste. Policy makers and plant operators could adopt the proposed optimization model under uncertainty in the selection of an optimal solid waste disposal. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Swine house floor durability enhancement using Pozzolan-containing concrete mix designs(2021-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A stochastic, two-level optimization model for compressed natural gas infrastructure investments in wastewater management(2016-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A Study on High-Speed Rail Pricing Strategy for Thailand Based on Dynamic Optimal Pricing Model(2021-06-30); ; ; ; Moryadee, SeksunThe Bangkok–Nong Khai high-speed railway is the first high-speed line in Thailand and is currently under construction. The project is due to be completed by 2023, with ticket prices starting at 80 baht plus 1.8 baht per km which can be considered as a straight-line fare set with a fixed rate increase. Different from the current price policy, this paper examines the application of dynamic pricing to Thailand’s HSR. Dynamic Pricing Optimizer proposed in this paper is a unique system of dynamic pricing by considering the changes in the amount of service requirements and the time of purchasing tickets designed to solve the problem of pricing that is appropriate. First, The Dynamic Pricing Optimizer (DPO) system will integrate the user data from the latest trip or historical information. After that, there will be a forecast for users of high-speed trains based on historical data in order to create a demand function that is linear. After that, the price will be determined by the optimization method to find the most suitable price in order to maximize the revenue. Lastly, we compare both fare policies and found that The Dynamic Pricing policy can increase revenue up to 6.5%. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, An Optimization Model for Solid Waste Collection and Processing: Case Study of Bangkok, Thailand(2024-01-01); ; Chunawa, MaruesaThis paper has applied operation research to solid waste management systems. The objective is to maximize expected net carbon dioxide equivalent (CO2 e) offsets from four disposal processes (landfill, incineration, producing refuse derive fuel (RDF) and composting). Recycling or non-recycling processes is selected before disposal process. An optimization model was proposed for the optimal solution and decision-making selects the best solution for the solid waste management supply chain for Bangkok, Thailand. Maximum capacity of each disposal process must fulfill, and the recycling method will be a control method. The total amount of municipal solid waste is indicated 9,727.84 tons and maximum amount of recycling waste (827.84 tons) is allowed. The net CO2e offsets is highly correlated with the quantity of solid waste. Moreover, the disposal process that producing RDF is the recommended decision for the department of environment of Bangkok because of the maximum number of CO2e offsets. Eight scenarios were applied to find the lower amount of the net CO2e offsets. Increasing sanitary solid waste disposal capacities are the main assumption affected the amount of CO2e emissions and/or offsets. Scenario 8 increases double capacity for all disposal techniques, and the net CO2e offsets are increased from 4,472.89 tons to 8,945.78 tons. Policymakers and plant operators could adopt the proposed optimization model in the selection of high CO2e offsets system. Moreover, the total number of carbon footprint for organization (CFO) could be reduced.