Kasem Bundit Engineering Journal

การประยุกต์ใช้เทคโนโลยีดิจิทัลในการแปลงข้อมูลการผลิตเพื่อเพิ่มประสิทธิภาพการจัดการการผลิต

กรกนก ยิ้มพลาย, กวินธร สัยเจริญ, สิทธิชัย แซ่เหล่ม — Fri, 28 Aug 2026 00:00:00 +0700

This research aims to develop a digital system for data acquisition, monitoring, and visualization, with a focus on the packaging process in a case study industry. The primary objective is to enhance data management efficiency. By integrating Lean manufacturing principles, specifically the identification of the Seven Wastes and Why-Why Analysis, the study seeks to streamline operations and eliminate non-value-added activities. Furthermore, the system design incorporates Human-Computer Interaction (HCI) principles in accordance with ISO 9241. The research methodology encompasses an initial state assessment, an analysis of shopfloor data management processes, and the design of a data architecture to facilitate seamless data integration from digital forms into a centralized database. The empirical results demonstrate that the proposed digital system successfully reduced operational steps by 33.33% and decreased total working hours by 63.98%. Notably, manual data entry errors were eliminated (reduced to zero), and data latency dropped significantly from 24 hours to just 1 hour. Economic evaluation further indicates the project's viability, yielding a Return on Investment (ROI) of 43.73% per annum with a payback period of approximately 2 years and 3 months.

อิทธิพลของการจัดเรียงแถวของแผงโซลาร์เซลล์ที่มีต่อสัมประสิทธิ์แรงลม

จิรวัฒน์ จันทร์เรือง, วิโรจน์ บุญญภิญโญ — Fri, 28 Aug 2026 00:00:00 +0700

This study utilizes wind tunnel testing and 2D steady-state Computational Fluid Dynamics (CFD) employing the k-w SST turbulence model to evaluate the wind force coefficients acting on ground-mounted solar panels in single and row configurations situated in open terrain. Results indicate that single panels exhibit maximum normal force at a 40^o tilt, slightly to moderately exceeding JIS C 8955 standards between 15^o and 40^o. In contrast, row configurations show significantly lower coefficients due to the shielding effect, particularly on inner panels where flow separation is reduced. Additionally, the CFD analysis revealed a 5–17% discrepancy compared to the wind tunnel test results. This deviation is attributed to the inherent limitations of 2D steady-state simulations, which cannot fully replicate complex 3D flow separation behaviors. These findings provide critical insights for optimizing the structural safety and efficiency of solar array designs against wind loads.

การทำนายลักษณเฉพาะการไหลแบบปั่นป่วนของเจ็ตพุ่งชนแบบหลายช่องโดยใช้หัวฉีดกลม

เมืองแก้ว ยุตัน — Fri, 28 Aug 2026 00:00:00 +0700

This paper presents the prediction of a mathematical model for the simulations of turbulent flow in steady incompressible flow of confined multiple impinging jets. A finite volume method with standard turbulence model including a reynolds stress model (RSM) is used in predicting the impinging jet flows together with a first order upwind (FOU) Scheme. 2D axisymmetric to numerical schemes on the prediction by the computational fluid dynamics (CFD) program ansys fluent 2024 r1, to study the predicted results of the characteristics of axial velocity, velocity path way, vector velocity profiles and direction of rotation of the flow channel in 2 types at nozzle sizes d = 10 and 13.3 mm. are compared with hot-wire anemometer experimental data. The computations and analysis results show that at nozzle size d =10 mm, the standard model predicts an average of 89.67%, while the RSM 87.43%, and at nozzle size d =13.3 mm, the average is 93.97%, while the RSM 91.31%. When compared with the measurement results, it shows that the standard model performs close better accuracy than the RSM on axial velocity.

การปรับปรุงกระบวนการผลิตอุตสาหกรรมอาหารโดยการประยุกต์ใช้ดีเอ็มเอไอซีและระบบอัตโนมัติแบบดิจิทัล: กรณีศึกษาการผลิตปูอัดในประเทศไทย

คมกริช วีรวัฒนา, ประยุทธ์ ฤทธิเดช, ศุภรัชชัย วรรัตน์ — Fri, 28 Aug 2026 00:00:00 +0700

This research aims to improve the efficiency of the production process in the food industry by applying Lean Six Sigma concepts along with digital systems and automation under the DMAIC framework. The research employed a single-case embedded action research design in the case study factory, analyzing the production process using Value Stream Mapping 4.0 to identify losses in the process and establish key performance indicators. The study found that improving the production process by incorporating automation increased productivity by 430.87%, reduced waiting time from 39.50 seconds to 10.80 seconds, decreased lead time by 56.25%, and significantly increased the production process capability (Cpk) from 0.40 to 1.55. The implementation of automation and digital data integration in operations also enhanced the continuity of the production process flow and reduced system losses. Additionally, an economic feasibility analysis of process improvement options using financial indicators such as net present value (NPV), internal rate of return (IRR), and payback period showed that the investment in process improvement was justified, yielding a worthwhile return with an NPV of 22.20 million baht, an IRR of 30.70%, and a payback period of 2.64 years. This research presents an integrated approach for developing production process efficiency, which can be applied as a model for industries with similar processes.

การคำนวณแรงลมของอาคารเตี้ยหลังคาทรงจั่วและโค้งโดยการทดสอบแบบจำลองในอุโมงค์ลม

นรวิชญ์ มั่นศิลป์, จิรวัฒน์ จันทร์เรือง, วิโรจน์ บุญญภิญโญ — Fri, 28 Aug 2026 00:00:00 +0700

This study investigates the wind pressure distribution on low-rise buildings with gable roofs at 18.4^o and 26.7^o pitches, and a curved roof with an equivalent pitch of 18^o. Experimental tests were conducted using 1:80 scale models in a boundary layer wind tunnel to evaluate three aerodynamic characteristics: (1) local wind pressure coefficients, (2) surface-averaged wind pressure coefficients over each entire building face, and (3) area-averaged wind pressure coefficients corresponding to specific tributary zones on each face. A Voronoi approach was systematically employed to calculate the tributary areas. The findings reveal distinct differences in aerodynamic behavior between the gable and curved roof configurations. For gable roofs, the surface-averaged wind pressure coefficients generally align with the provisions of DPT 1311-50 and ASCE 7-22. However, within the critical zones of the 18.4^o gable roof, the DPT 1311-50 standard underestimates the design wind pressures for components and cladding (C&C) compared to the experimental results, whereas the ASCE 7-22 standard yields better agreement with the empirical data. Furthermore, this study contributes to the fundamental understanding of wind-induced pressures on curved roofs, addressing a significant gap in the DPT 1311-50 standard where provisions for such geometries are currently lacking.

การออกแบบผลิตภัณฑ์เซรามิกโคมไฟอโรมาโดยประยุกต์ใช้เทคนิคการแปลงหน้าที่เชิงคุณภาพ: กรณีศึกษา วิสาหกิจชุมชนผู้ผลิตเซรามิก

Fri, 28 Aug 2026 00:00:00 +0700

At present, decorative ceramic products manufactured by ceramic community enterprises face problems related to limited product variety and the inability to respond effectively to consumer demands, which affect both market competitiveness and product value enhancement. Therefore, this research aimed to design and develop a ceramic aroma lamp reflecting local identity by applying the Quality Function Deployment (QFD) technique to systematically translate customer requirements into product design guidelines. Data were collected from a sample consisting of customers, ceramic product users, and ceramic manufacturers in Nakhon Si Thammarat, Songkhla, and Phatthalung provinces, totaling 105 participants. The research instruments included questionnaires and in-depth interviews. The collected data were analyzed using descriptive statistics, including mean scores and the prioritization of important product attributes through the House of Quality (HOQ) matrix. The results revealed nine important product attributes for product design, including product aesthetics, price appropriateness, crack-free characteristics, product dimensions, color tone selection, local identity, product lifespan, product patterns, and coating durability. These attributes were subsequently utilized in the design and development of the product prototype. The customer satisfaction evaluation indicated that the overall mean satisfaction score for the decorative ceramic product was 4.58, with a standard deviation (SD) of 0.19, representing the highest level of satisfaction. The findings demonstrate that the Quality Function Deployment technique can be effectively applied to the design and development of new decorative ceramic products that respond to the needs of ceramic product users.

การบูรณาการกลยุทธ์พอร์ตโฟลิโอผลิตภัณฑ์กับกรีนลีนซิกซ์ซิกมาเพื่อการผลิตที่ยั่งยืน: กรณีศึกษาอุตสาหกรรมอาหารสัตว์ในประเทศไทย

วิรัช ชัยอัศวนันต์, ศุภรัชชัย วรรัตน์, ประยุทธ์ ฤทธิเดช — Fri, 28 Aug 2026 00:00:00 +0700

The feed manufacturing industry plays a critical role in food security and economic growth in Thailand. However, production processes continue to suffer from inefficiencies, particularly overfilling losses, which result in excessive material consumption, increased operational costs, and excess carbon dioxide gas emissions. This study aims to develop an Integrated Sustainable Portfolio–Green Lean Six Sigma (ISP–GLSS) framework that strategically integrates three key dimensions: (1) product portfolio strategy using the เมทริกซ์บีซีจี, (2) process performance improvement through Lean Six Sigma tools (DMAIC, SPC, and DOE), and (3) sustainability assessment based on Green Manufacturing principles and the United Nations Sustainable Development Goals (UN SDGs). A case study methodology was employed in a terrestrial feed manufacturing company in Thailand. The product portfolio analysis identified swine feed as the most strategically significant product in terms of market share and growth, which was subsequently selected for process improvement. The results demonstrate substantial performance improvements, including the elimination of overproduction and defects, an increase in the Sigma level from 2.07 to 5.88, and an enhancement of process capability (Cpk) from 0.19 to 1.46. Overfilling losses were reduced by 7,986.69 kg per month, yielding an annual financial benefit of 1,245,923.25 Baht and a reduction of 83.65 tonCO₂e per year. The findings confirm that the ISP–GLSS framework effectively integrates operational excellence with environmental sustainability and contributes directly to SDGs 9 (Industry, Innovation and Infrastructure), 12 (Responsible Consumption and Production), and 13 (Climate Action).

การพัฒนาแบบจำลองแบบเรียลไทม์เพื่อเพิ่มประสิทธิภาพการควบคุมเรืออัตโนมัติด้วยอัลกอริทึม Twin Delayed Deep Deterministic Policy Gradient ในระบบการเรียนรู้เสริมกำลังเชิงลึก

Fri, 28 Aug 2026 00:00:00 +0700

In accordance with the International Maritime Organization (IMO) regulations concerning greenhouse gas emission reduction and the transition toward autonomous shipping, developing a ship control system that integrates energy management efficiency with safety is imperative. This research proposes a real-time framework on the MATLAB/Simulink platform for the Ro-Pax vessel M/S Nils Holgersson. A comprehensive mathematical model was developed, encompassing ship dynamics, a multi-engine propulsion system, and environmental resistance utilizing simulated sensor data. Furthermore, an Application Programming Interface (API) was integrated with a marine meteorological database to retrieve real-time weather data for model training. This study applied Deep Reinforcement Learning (DRL) via the Twin Delayed Deep Deterministic Policy Gradient (TD3) algorithm to manage the main engines' load distribution and control the rudder angle. The primary objectives were to minimize fuel consumption and enhance collision avoidance success rates. Simulation results demonstrated that the proposed framework reduced total fuel consumption by 1.592% (equivalent to 73.56 kg per voyage) along a 43-nautical-mile route from Yachthafen Hohe Düne, Rostock, to Marina Baltica 1, Lübeck, Germany. This efficiency improvement consequently mitigated CO₂ emissions by 226.71 kg per voyage. Additionally, the system increased the collision avoidance success rate by 1.75% compared to conventional control systems (improving from 93.71% to 95.46%). This was evaluated based on the vessel's ability to maintain a safe distance and allocate adequate time margins for evasive maneuvers. These outcomes clearly demonstrate the proposed framework's high potential for commercial implementation, successfully achieving both safety and energy efficiency targets simultaneously. This research provides a significant foundation for the future development and advancement of autonomous marine vehicle control systems.

การวิเคราะห์การกระจายตัวและแนวโน้มดัชนีองศาวันความเย็นรายภูมิภาคของประเทศไทย

อภิวัฒน์ ชัยสุกัญญาสันต์, พงศกร คชาพงศ์กุล, สิริชัย จิรวงศ์นุสรณ์ — Fri, 28 Aug 2026 00:00:00 +0700

This study aims to develop a CDDs map covering all six regions of Thailand based on daily average temperature data from 2020-2024 for six representative provinces. The base temperature of 25 °C was applied in accordance with ASHRAE standards for hot–humid climates. The results reveal that the Central and Eastern regions exhibit the highest CDDs values of 1739 and 1732 respectively, while the Northern and Northeastern regions record the lowest values of 1206 and 1175. The national average CDDs increased by 5.9% over the five-year period, reflecting the influence of global warming and a continuing rise in cooling energy demand. Linear regression analysis indicates a negative correlation between altitude and CDDs (R² = 0.51, p = 0.11, t = –2.07), suggesting that lowland areas require greater cooling energy compared with highland areas. Regions with higher CDDs, such as the Central and Eastern regions, should adopt thicker insulation and stricter OTTV/RTTV criteria under Thailand’s Building Energy Code (BEC) than regions with lower CDDs. The outcomes of this study can be applied to energy conservation planning and the design of energy-efficient buildings in Thailand.

APPLICATION OF LAND USE AND TRANSPORTATION INTERACTION (LUTI) MODEL FOR TRANSIT-ORIENTED DEVELOPMENT (TOD): THE CASE STUDY OF CITY AND ACTIVITY CENTER DEVELOPMENT ALONG THE MRT PINK LINE CORRIDOR, BANGKOK METROPOLITAN REGION

Sikkawat Sukhumaumnuychai — Fri, 28 Aug 2026 00:00:00 +0700

Bangkok Metropolitan Region continues to face severe traffic congestion and high dependence on private vehicles, while major investment in rail transit has been promoted as a mechanism to support more sustainable urban development. This paper applies a Land Use and Transportation Interaction (LUTI) model using TRANUS to assess Transit-Oriented Development (TOD) along the MRT Pink Line corridor, focusing on two contrasting activity areas: Chaeng Watthana Government Center (CWG) and Muang Thong Thani (MTT). The study's contribution is a corridor-scale framework that translates TOD concepts into model outputs, including density, diversity, accessibility, consumer surplus, land consumption, and travel demand. The model was developed using population, employment, land use, land price, traffic network, public transport, travel behavior, and traffic count data, and was validated against survey observations in the base year. Scenario testing indicates that the MRT Pink Line, feeder services, and pedestrian improvements reduce private-car trips from 466,611 trips/day in BAU2030 to 396,799 trips/day in Scenario A and 390,175 trips/day in Scenario B, representing reductions of 15.0% and 16.4%, respectively. Walking trips increase by 43.2%-47.3%, and bus trips increase by 25.1%-59.2%, indicating improved access to public transport. However, transport infrastructure alone generates only limited land-use restructuring. When the Floor Area Ratio (FAR) policy is added in TOD target areas, residential floor area increases from 1.42 to 2.11 million square meters in MTT and from 0.19 to 0.56 million square meters in CWG. The findings show that TOD implementation requires integrated rail infrastructure, feeder systems, pedestrian facilities, mixed-use zoning, and FAR-based planning controls.

การศึกษาพฤติกรรมการเดินทางของผู้ใช้บริการทางพิเศษ กรณีการกำหนดค่าผ่านทางตามช่วงเวลา

แสงระวี ต้นงาม, เทอดศักดิ์ รองวิริยะพานิช — Fri, 28 Aug 2026 00:00:00 +0700

This research aims to investigate the travel time choice behavior of expressway users and to analyze the factors influencing changes in travel time choice behavior under a Time-of-Day Pricing scheme. The study area is the Prachachuen Toll Plaza (inbound) on the Si Rat Expressway, which is characterized by heavy traffic congestion and relatively high toll rates. Travel behavior was investigated using a Stated Preference (SP) survey based on hypothetical scenarios involving 469 four-wheel vehicle users. The collected data were analyzed using a Discrete Choice Model, specifically the Multinomial Logit Model (MNL). The results indicate that travel time, toll fare, and work time significantly influence users’ choices of travel periods. The analysis further reveals that, during the morning peak period (06:01–09:00), 42.22% of travelers were unable to adjust their travel time due to work schedule constraints, whereas 10.07% were able to shift their travel time. The latter group can be further classified into two subgroups based on their preferred alternative travel periods: shifting to the Pre-peak period (04:00–06:00) and shifting to the Post-peak period (09:01–12:00), accounting for 4.08% and 5.99%, respectively.