จำนวน Repository ( 558 )
ระบบตรวจสอบครุภัณฑ์ผ่านเว็บแอพพลิเคชั่นกรณีศึกษางานพัสดุ คณะวิทยาศาสตร์และเทคโนโลยี
The Online Equipment Inventory System for Subdivision of Supplies Case study at Faculty of Science and Technology is developed based on web application by using PHP and Laravel framework. The purposes of this system are firstly to systematically manage the database system of the asset equipment in the Faculty of science and technology. Secondly to increase the searching process rapidity and to create the summarize reports in PDF format. Lastly to produce the QR code for verified the asset equipment. This system is consists of the administrators and system users. In the part of satisfied evaluation the system is evaluated by the example target officers group. The overall result of satisfaction score is 4.10 which means the system can fulfill the requirement in a good level. Moreover when considering in each part of satisfaction; 1. design part 2. efficiency and functional part and 3. system satisfaction part the result scores are 3.96 4.18 and 4.06 consequently. In conclusion the Online Equipment Inventory System for Subdivision of Supplies Case study at Faculty of Science and Technology is work properly.
การศึกษาการผลิตก๊าซชีวภาพโดยการหมักร่วมระหว่างมูลไก่กับสาหร่ายหางกระรอก
This work presented the production of biogas using anaerobic co-digestion between hydrilla verticillata (HV) from Songkhla Lake Basin and chicken manure (CM). From the study of compositions of both wastes it was found that the COD of CM and HV were 11200 and 14400 mg/l and pH were 6.5 and 5.5 respectively. The biogas production using anaerobic single-digestion of untreated hydrilla verticillata (UHV) gave accumulative methane of 1251 ml-CH4/g-VS and methane production of 78.28 L-CH4/kg-substrate was obtained. For hydrilla treated with 2% w/v NaOH (THV) the accumulative methane was 1786 ml-CH4/g-VS and the obtained methane production was 91.87 L- CH4/kg-substrate which was 17.5 % increase when compared to the UHV. For the biogas production using anaerobic single-digestion of CM it was found that the accumulative methane and methane production were 978 ml-CH4/g-VS and 78.28 L- CH4/kgsubstrate respectively. These were lower than the studies using HV. The study of anaerobic co-digestion of HV and CM at three different ratios; 1:1 2:1 and 3:1 was studied. It was found that the anaerobic co-digestion using THV and CM at ratio 3:1 and 2:1 gave the highest potential for biogas production. The accumulate methane of 3202.20 and 2079.19 ml- CH4/g-VS were obtained respectively. The methane productions were 2.53 and 82.26 L-CH4/ton-substrate for ratio 3:1 and 2:1 respectively which is no significant different at 95 % confidence interval.
การศึกษาระยะเวลาอบแห้งที่เหมาะสมและลักษระทางกายภาพของหมูแผ่นอบแห้งด้วยไมโครเวฟตามด้วยอากาศร้อน
The objectives of this research were to determine the suitable times of pork slices drying using microwave followed by hot air and to find specific energy consumption during drying. The physical characteristic (color and hardness) and the sensory test of dried pork slices were also investigated. Pork slices with the sizes of 50x50x1.3 and 50x50x2.2 millimeters were dried using the microwave at the powers of 160 320 480 640 and 800 watts until the samples did not burn during drying. Then the samples were dried using hot air at a temperature of 110oC until the moistures of the samples were lower than 20% dry basis. Based on the experimental results it was found that the suitable times of the samples drying using microwave were 50-600 seconds which depended on the microwave powers and the pork thicknesses. In hot air drying period drying times of the samples with thicknesses of 1.3 and 2.2 millimeters were 30 and 45 minutes respectively. The microwave powers had no significant effect on the redness (a value) and yellowness (b value) of dried pork the hardness of dried pork and the specific energy consumption (P<0.05). The pork thicknesses had the significant effect on the lightness (L value) and yellowness (b value) of dried pork the hardness of dried pork and the specific energy consumption (P<0.05). Moreover sensory scores of the dried pork obtained from this research were close to those obtained from the local market.
การศึกษาหาเปอร์เซ็นต์การหดตัวของพลาสติก อะคริโลไตรล์บิวทาไออีนสไตรีน โดยยึดตามาตรฐาน ASTM D955 standard test method
The shrinkage of plastic was caused by the shape of the product and the type of plastic used in the injection. The plastic shrinkage difference was resulted from the temperature used in melting the injection speed mold cooling and different injection surroundings. These led to unknown exact value of plastic shrinkage and the trial and error work has been done. As a result of trial and error work the injection products were not in the determined size. This research aims to find the percentage of plastic shrinkage according to standard test ASTM D955 from (Amorphous Thermoplastic) (Acrylonitrile Butadiene Styrene ABS). The findings showed that square specimen size 60x60x2 mm measured from vertical perpendicular to flowing direction the shrinkage was at 0.86% the shrinkage was at 0.59% when measured from flowing direction and the thickness expanded at 20%. For the rectangular specimen size 12.7x127x3.2 mm measured from vertical perpendicular to flowing direction the expanding was at 0.16% the shrinkage was at 0.88% when measured from flowing direction and the thickness expanded at 14.86%. The circular specimen size 100x3.2 mm the shrinkage was at 1.26 when measured from vertical perpendicular to flowing direction the shrinkage measured from flowing direction was at 0.82% and the thickness expanded at 13.23%
ศึกษาตัวแปรที่มีผลต่อท่อความร้อนที่ติดตั้งวัสดุพรุนชนิดตาข่าย
This research aims to study the parameters have affected the pipe which was studied the heat transfer characteristics of a heat pipe with a mesh wick. The heat pipe made from copper tubes with intemal (ID) as 10 and 12 mm and length of 30 cm which was installed a copper mesh wick inside a tube. Three working fluids are distilled water ethanol and refrigerants-11 (R-11). The filling ratios is 50% with respect to evaporator volume. The operating temperature at the evaporator section is: 50 70 and 90 oC. The condenser section has cooked by water with a flow rate of 0.5 L/min. Then all of the experimental data were compared with the heat pipe without copper mesh wick. It was found that heat pipe at ID 12 mm yielded a better heat transfer rate when compared with heat pipe without a mesh wick. The heat pipe produced a heat transfer rate value of 7.3 W and heat pipe efficiency of 58.5 at evaporator section’s temperature of 90oC. In addition the mesh wicks will help transfer the working fluid in the condenser section return to the evaporator section. The condensed liquid had spread around the walls of the heat pipe. The working fluid was condensed to the evaporator section then affected to a higher heat transfer rate.