จำนวน Repository ( 816 )
การศึกษาและพัฒนาระบบการอบแห้งข้าวเปลือกด้วยพาหะลมและเกลียวลำเลียง
Moisture content has a marked influence on all aspects of paddy and rice quality. These issues also have significantly importance for rice industry and economy of Thailand. Many drying process such as spouted bed technique and fluidized bed technique are extremely studied in terms of instrument design and energy consumption. However these drying processes were not suitable for high economic rice. Because of these processes performed highly damaged kernels during drying process. The objective of this project we proposed the alternative drying system that perform low damaged paddy kernels. We also were design and fabrication drying system for paddy in terms of conveyer pipe. This machine have the performance including feed rate approximately 22.83 kg/hr. drying temperature 30-120ºC air velocity 0-1.5 m/s drying time 14.64-16.91 min and energy consumption 6.02 baht/hr. We improved our machine by drying the RD41 paddy at moisture content 28 (%w.b.). We also setup drying temperatures 40°C 45°C 50°C 55°C and 60°C with air velocities 0.7m/s 1.0m/s and 1.5m/s. We found that all drying temperatures have the final moisture content lower than 15 (%w.b.) and percentage of complete paddy after drying (HRY-paddy) more than 96%. For the kernels quality we found that HRY-Brown rice tend to increase with drying temperature increased. We also found that HRY-Unbroken kernels for polishing tend to decrease between drying temperature 40°C - 50°C for air velocities 0.7m/s and 1.5m/s. Therefore these results obtained can be such a high potential approach that can be used for further developing into rice economy and industry of Thailand.
การศึกษาและพัฒนาวัสดุกันกระแทกจากเส้นใยพืชมะละกอในงาน บรรจุภัณฑ์สาหรับผลิตภัณฑ์แก้วและเซรามิค
The objective of the research is to study and develop a shock and impact absorber material. This material are make from papaya stem and to be used in glass and ceramic packaging. This research is also focus on recycling agriculture waste 1.to added value 2.minimized waste and trash and 3.support the idea of saving the environment and improve economic in community. The process of making this shock and impact absorbing material started with setting the papaya stem in to a frame shape and use natural bonding such as rubber to keep it in that shape. After that it become a shock and impact absorber sheet. The researcher chose six items as case study and they are; tall glass short glass glass doll small cup vase and ceramic doll. All these six items had to go through a standard packaging test and a satisfaction questionnaire. Papaya stem after it has been treaded and soaked in water it become a net like material and bond well with the natural bonding material. In this case it was rubber. After it dry it is soft enough to be used as glass and ceramic items yet strong enough to pass all the packaging test. These shock and impact absorber material performed well with the test and the satisfaction questionnaire and receive high score on the test in both the design and the function.
การแบ่งส่วนตลาดผู้บริโภคคนไทยบนพื้นฐานทัศนคติทางการเงิน
This is a survey research aimed at studying the Thai consumer financial attitude and to compare the Thai consumer financial attitude classified by personal factors. The sampling groups are 400 Thai citizens living in Bangkok. There are a few stages in selecting the sampling groups by convenient sampling method. Data is collected by questionnaires. The statistics used in analyzing data are percentile means standard deviation T-Test and one-way analysis of variance. The research results found that 1. The financial attitude of every Thai-consumer group is in the moderate level. While considering in group found that the rational consumer group the timid consume group and the scrooge consumer group are in the more level of financial attitude. The Saint consumer group the spender consumer group. The money-evil consumer group and the money-everything consumer group are in the moderated level of financial attitude. 2. The comparison of the Thai consumer financial attitude is done by sex age occupation education level and income found that there is a significant statistically difference at .05
การวิเคราะห์ค่าความเป็นฉนวนของบุชชิ่งหม้อแปลงไฟฟ้าแรงสูง
This article presents how the analysis an insulation of high voltage transformer bushing. The purpose is to analysis the moisture in the bushing to evaluate the approach for maintenance. The analysis rely on the principle of the Polarization and Depolarization Current (PDC) technique which is a technique for analyzing the insulation of high voltage equipment to test high voltage transformer bushing for a case study. This method is performed by energize 1000 Vdc into a bushing in period of time and then switch off the circuit for discharge current. Finally we calculate the moisture of main insulation of high volt bushing as well compare with standard moisture of criteria. The method is useful of preventive maintenance plane of high volt bushing and reduce the failure in the power system.
การจัดการระบบละลายน้ำแข็งในเครื่องทำความเย็นเพื่อการประหยัดพลังงาน
This paper presents about the defrosting time of evaporator in refrigerator by using the temperature different between evaporator and chilling area. This temperature different concept could control the defrosting system to operate according to the load. It also helps controlling the operation of fan motor to be able to operate in accordance with the defrosting time. In general system the timer is set at the highest humidity season which cause the unneccessary defrosting cycle even in low humidity season. This general system create the west of power usage colling system. These can cause time-consuming in defrosting process in the low humidity season and cause the unnecessary usage of power to cooling system. This research is to develop the controller for the defrosting system at evaporator from the investigation. As the results we have found that the defrosting system at evaporator according to its load made the refrigerator can decrease the power about 8% when comparing to constant time evaporator system