Journal of Energy and Environment Technology of Graduate School Siam Technology College

HYDROGEN: THE ALTERNATIVE ENERGY OF THE FUTURE

Thakrit Panklib — 2023-12-30

Currently, many countries have goals to reduce the amount of greenhouse gases released into the atmosphere or to release carbon to zero (Net Zero Emission) because it is an important cause of the global warming problem that every country around the world is facing today. This can be seen from the fact that the global temperature has increased by 1.1°C compared to before the industrial revolution era. It is understood that achieving Net Zero by 2050 is an effort to keep the global temperature increase no more than 1.5°C. To achieve the set goal, many countries must work together whether it is Reducing the release of greenhouse gases into the atmosphere Changing to electric cars and the use of various types of renewable energy (Renewable Energy) and including jointly reducing the use of fossil fuels (Fossil Fuel) in each sector. The use of hydrogen energy (Hydrogen) is another interesting option because it has many advantages, such as after combustion it will release zero carbon. It is an unlimited amount of renewable energy. Can provide 2.5 times as much heat energy as natural gas when compared to the same weight. And it can be used in conjunction with fuel cell technology to produce electricity for use in various forms as well. Therefore, hydrogen Therefore, it is another alternative energy which is likely to play an important role in the future and plays an important role in reducing carbon emissions in many sectors such as the chemical industry, metallurgy, and transportation, etc. At present, many countries around the world have introduced hydrogen as energy. already part of the National Energy Strategic Plan.

PRIORITIZATION OF FACTORS AFFECTING POLICY FORMULATION FOR REDUCE BURNING IN AGRICULTURAL AREAS TO REDUCE PM2.5 USING ANALYTICAL HIERARCHY PROCESS

WORANARA CHANABAWORNSAKUL — 2023-12-31

The open burning of biomass represents a significant factor influencing the concentration of PM2.5 in the atmosphere, particularly during the burning season in agricultural regions. This research endeavors to prioritize the factors that shape policy directions aimed at reducing burning practices in agricultural areas, thereby contributing to a decrease in PM2.5 pollution. The Analytical Hierarchy Process (AHP) was employed as the analytical framework, Data collection involved eliciting pairwise judgments from a diverse sample consisting of seven government agency representatives and eight elderly agricultural practitioners in Nakhon Sawan province. The final sample size comprised 15 participants. The data analysis was performed using Microsoft Excel spreadsheet software. The study analyzed five factors deemed critical to success: environmental factors, economic factors, technological factors, political factors, and social factors. Weightings were calculated to determine the relative importance of each factor and to facilitate comparisons regarding their significance in formulating policies to reduce burning practices in agricultural areas. The research findings indicate that economic factors held the highest importance (37.1%), followed by technological factors (18.2%), social factors (17.9%), political factors (13.6%), and finally, environmental factors (13.2%).

DATA APPLICATION MANAGEMENT SYSTEM NATIONAL SKILL STANDARD TESTING CENTER IN LOGISTICS SOUTHEAST BANGKOK UNIVERSITY UNDER LEAN CONCEPTUAL

Watcharin Jattukul — 2023-12-31

The purposes of this research were 1) to study the recruitment process of the National Skill Standard Testing Center for Logistics. Southeast Bangkok University 2) to develop the admission management system of the testing center and 3) to study the satisfaction level of the admission management system of the testing center. From studying the admissions process of the testing center with process flow chart It was found that the problems arising in the admissions process of the testing center There are complex workflows. This results in wastage, error, and inefficiency with operators. It also affects the satisfaction of candidates taking the test. The researcher therefore analyzed the problems found to determine the cause by questioning techniques. Why-Why-Analysis Then, the researcher developed a system to manage the admissions data of the testing center according to the system development life cycle (SDLC) principle to reduce waste in the testing center's admissions process. And to assess the satisfaction level of the admissions management system of the testing center. The research results showed that Admission process of the testing center from the original period of 22 days, reduced to 12 days, or 45.45 percent of the reduced amount. and satisfaction results of administrators, faculty, and staff on the use of the admissions management system of the testing center the mean was 4.19 and the standard deviation was 0.52 or was in the quality level of satisfaction. Classified by aspects of 1) Functionality the mean was 3.97 and the standard deviation was 0.53 or was in the quality level of high satisfaction. 2) Management and efficiency of the system. The mean was 4.42 and the standard deviation was 0.51 or was in the quality level of satisfaction. 3) System safety. The mean was 3.92 and the standard deviation was 0.58 or was in the quality level of satisfaction. with a mean of 4.54 and a standard deviation of 0.51 or at the highest level of satisfaction quality and 5) information system services. The mean was 4.14 and the standard deviation was 0.51 or was in the quality level of satisfaction. However, the results of the satisfaction of the test applicants on the use of the admissions management system of the testing center the mean was 4.51 and the standard deviation was 0.51 or was in the highest level of satisfaction quality. Classified by aspects of 1) Functionality The mean was 4.52 and the standard deviation was 0.52 or was in the highest satisfaction quality level. 2) Management and efficiency of the system. The mean was 4.49 and the standard deviation was 0.51 or was in the quality level of high satisfaction. The mean was 4.53 and the standard deviation was 0.51 or was in the highest satisfaction quality level. with a mean of 4.50 and a standard deviation of 0.51 or at the highest level of satisfaction quality and 5) information system services. The mean was 4.51 and the standard deviation was 0.53 or was in the highest level of satisfaction quality.

STUDYING THE POTENTIAL AND ENERGY ECONOMIC ASSESMENT OF USING AN AIR-COOLED WATER CHILLER COMBINED WITH AN EVAPORATIVE COOLING SYSTEM IN STRAWBERRY CULTIVATION GREENHOUSE

Tanyarat Janchoke — 2023-12-31

This research aims to study the potential and evaluate the investment economics of a cooling system that combines evaporative cooling with a chiller system in a strawberry greenhouse. The greenhouse has dimensions of 12 m in width, 40 m in length, and 6 m in height. It is covered with polyethylene plastic. The experiments are divided into the following two operating modes: Evaporative Cooling System (EV) and Evaporative Cooling System combined with Chiller System (EV+CH). From the study of the potential of the cooling system used in the prototype greenhouse. In each month studied it was found that, the daily average maximum solar radiation intensity (I_T) is between 600-700 W/m², it was found that during the month of March 2022, the highest average air temperature inside the greenhouse was observed when compared to the period from November 2021 to February 2022, with an average value of 32 °C. This value could not be reduced throughout all time periods as desired by strawberries, which require temperatures below 30 °C. Regarding the Coefficient of Performance (COP) of the cooling system, it was discovered that in the operation of the EV+CH cooling system was 17, which is higher than the operation of the EV cooling system of 14. For evaluating the investment economics of the cooling system in the greenhouse the study 4 cases with different conditions some cases are prescriptive adding the planting cycle or adding a bench, which it was found that increasing the planting cycle and adding a bench planting trough would be the most appropriate approach. This is since this case has the highest Net Present Value (NPV) and Internal Rate of Return (IRR), which are 909,854 Baht and 20.78%, respectively. Additionally, this case has a payback period (PB) are 4 years 6 months, making it the shortest period for recouping the investment compared to other cases.

STUDYING SATISFACTION WITH THE USE OF VIRTUAL CLASSROOMS IN TERMS OF COMPUTER HARDWARE

สุทธิลักษณ์ ชุนประวัติ — 2023-12-31

This experimental research aimed to create a virtual classroom environment focusing on computer hardware and assess the satisfaction of first-year undergraduate students majoring in Information Science and Computer during the first semester of 2566 academic year. The sample group comprised 30 students. The research utilized a virtual classroom and computer hardware simulation as tools. The findings revealed that students learning in the virtual classroom environment for computer hardware expressed a high level of satisfaction, with an average score of 3.85, equivalent to 77%.

COMPARISON OF THE EXPERIMENTAL RESULTS OF THERMAL PERFORMANCE BETWEEN THE USE OF SOLAR ROOF CHIMNEY ASSISTED WITH DC FAN AND ROOF TURBINE VENTILATION UNDER HOT AND HUMID CONDITIONS IN THAILAND

Preeda Chantawong — 2023-12-31

This paper aims to compare the thermal performance and heat load reduction between a solar roof chimney with DC fan (SRC with DC fan) and roof turbine ventilation (RTV) and simple roof concrete (SRC). It is installed on the roof facing the south side of the three small model houses with a volume of 1.95m³ to compare the performance of a model house equipped with a SRC with DC fan and RTV to the simple roof concrete. Tested under hot and humid conditions in Thailand. The experimental results revealed that indoor temperature of SRC with DC fan and RTV room was less than that of single roof concrete (SRC) rooms and environment of the model house is about 0.2–4.5°C. SRC with DC fan and RTV could induce ventilation about 0.022–0.67m/s and reduce heat from under roof was more than that of single roof concrete room about 2.5–96 percent. Finally, the SRC with DC fan and RTV system, to save energy and promote the development of the use of solar energy, protects the environment.

A STUDY OF LOGISTICS FACTORS AND ACTIVITY FOR SELECTION THE LOCATION OF LOGISTICS CENTER IN VIENTIANE, LAO PEOPLE'S DEMOCRATIC REPUBLIC

Phonephana Phrommala — 2023-12-31

Currently, the logistics industry has been highly competitive since before the COVID-19 crisis from large foreign businesses, which have divided the market due to their expertise in supply chain management. It has a business model driven by technology and innovation. This makes it difficult for entrepreneurs with limited capital to compete. In addition, the problem of global warming has clearly affected the world. The main cause of the greenhouse effect is the amount of carbon dioxide emitted. From various forms of burning. The purposes of this study are 1) study the basic factors in establishing a logistics center in Vientiane Capital. Lao People's Democratic Republic 2) Analyze important logistics activities in selecting a logistics center location in the capital city of Vientiane, Lao People's Democratic Republic. Use interviews to collect information from key informants who are experts. Logistics 15 people and questionnaires from the population of companies that directly operate logistics, 100 people, purposive sampling. Statistics analyze data using frequencies, percentages, means, and standard deviations.

Results of research on basic factors in establishing a logistics center in Vientiane Capital. The Lao People's Democratic Republic consists of geography. Infrastructure Logistics activities: 13 activities; Business operations and product quantity Overall, the factors that are considered in the selection of basic logistics center locations give importance to all aspects at a high level ( = 4.39), together with all 13 logistics activities, which are considered a process in Carry out work that drives products and services to ensure overall efficiency of all 13 logistics activities. The importance of every aspect is at a high level ( = 4.40). Suggestions and needs regarding factors and logistics activities used in Selection of a location for the logistics center of Vientiane, Lao People's Democratic Republic, mainly requires that operators focus on logistics management. It is 26.13 percent and the government sector must give importance to the logistics system in raising the quality of service as well as developing it into a standard model of logistics service providers under the logistics center. in Vientiane capital Lao People's Democratic Republic