A case study was conducted to design construct and test a thermosiphon economizer for increasing the temperature of feed water by using waste hot water. The simulation of the thermosiphon economizer (heat exchanger) for the establishment of the optimum size was performed using the thermos-economical method. The thermosyphon was made of a total of 80 copper tubes (outside diam.19.05 mm) with evaporative adiabatic and condensation lengths of 300 10 and 300 mm respectively. The working fluid was R-134a filling ratio was 50% by evaporative volume and the thermosiphon was arranged in a staggered form. In testing performance flow rate of the inlet hot water was set at 10 L/min and the controlled inlet temperature of cold water at 25oC. The average flow rate of the cold water was set at 5 7 and 10 L/min respectively. Results showed that the maximum of rate of heat transfer from the condenser section occurred at the flow rate of the cold water of 10 L/min. When test the inlet temperature of hot water of 4555 and 65 o C were used at the inlet volume flow rate of cold water of 10 L/min maximum heat transfer rates from the condenser 4626 8260 and 8790 W were achieved. Moreover the outlet temperature of the cold water which was initially 25o C changed to 311 34 and 37o C respectively. Therefore increasing the outlet feed water temperature reduced energy consumption. The effectiveness of the thermosiphon economizer with the inlet temperatures of hot water of 45 55 and 65o C was 0.47 0.48 and 0.49 respectively.

Research to develop the studying in the form of E-Book “Subject Fundamental of Drawing the structure of Paperboard Packaging” is done to evaluate the quality of the E-Book and the reaction of the students. The subjects for this research are 100 Undergraduate students and they are studying in the Packaging Design division in the Architectuer and Design department at the Rajamangala University of Technology Phra Nakhon. The title of this research is Package of Environmental Awareness Idea which is theory on Subject Fundamental of Drawing the structure of Paperboard Packaging. Therefore the lesson plant is divided in 7 plants. The results from the quality evaluation forms are very suitable as the researcher hypothesized. The analyzing in a book form was respectful at 3.91. The analyzing in an image form was the best at 4.15 and the last one in an E-Book form was very satisfactory at 3.78 The satisfaction questionnaires are suitable as the researcher assumed as well. The analyzing in a book was at 4.30 the image form was at 4.28 and the E-Book was 4.10 In conclusion quality and the satisfaction factor in this research are very sufficient in all forms; the book the images and the E-Book

The purpose of this research is to study productivity improvement at electronic parts’s assembly line finding the work stations with work station time longer than takt time. This research applied the 5W1H technique as a tool to problem analysis fundamental of hand motions to improve productivity. The study found that the assembly line consisted 15 work stations and a cycle time of 12.0 seconds which greater than the takt time which was 10.5 seconds. The work station time no.6 took longer than the takt time. The fundamental of hand motion technique was applied. By separating or eliminating the fundamental of hand motion did not affect the performance of the work stations. By being integrated the fundamental of hand motion with previous work station or next work station. As a result of research is the new cycle time of this production line is 10.0 seconds the production line capacity increased from 300 pieces per hour to 360 pieces per hour 20 percent increase

The objective of this research is to improve for material procurement decision support making process by using Lean Concept. The research methodology studied purchasing procurement and whole of production in local country of case study by making Value Streaming Mapping (VSM) calculated of production standard time set buffer time kept inventory and suitable supplier’s capacity. Finally used all data for design and develop computer program into support analyze and follow up delivery goods system to customer. Result of research found this new development program could increase delivery goods to customer efficiency by response with material preparation can improved average On Time Delivery rate at 94.55% and increased productivity from 966 to 1125 pcs/day; therefore case study had well increased local purchasing procurement efficiency reduced purchasing cost to 2.27 million Baht/month reduce Fuel cost at 46225.08 Baht/year on average and reduce greenhouse gas at 4.117 TonCo2e per year on average. They can support highly competitive and rapidly changing of electrical and electronics industrial to sustainable in the further.

It is a must for Thai citizens in this digital era to be able to absorb internationalization skills to survive in the connected world. The study entitled The development of a 3D application for teaching English with integrated digital technology and practical training aims to develop a 3D application for integrated English teaching with digital technology and practical training. Academic literature about 3D application systems the achievability of problems and instructional system design frameworks were reviewed. Additionally in- depth interviews were conducted with 10 key informants using a snowballing technique. The informants were English-teaching experts teachers and social science students. The main findings from the in- depth interviews revealed that most participants did not use HMD VR to learn and practice English language skills while traditional styled teaching was used more often. There had not been much technology-integrated learning compared to language- related games and applications were used. Moreover VR was not applied much to English learning. Accordingly with the devices of Unity Oculus Blender and C# language the development of 3D applications for teaching English with practical training has been developed as an appropriate and optional tool for Thai students with an educational opportunity in English communicative skill practice in the virtual world and accessibility to the useful technology.