จำนวน Repository ( 3447 )
การออกแบบและพัฒนาชุดขับเคลื่อนในการทดสอบการชนรถจักรยานยนต์
A design and development of powertrain module crash test using with the motorcycle crash test is aim to create a special tool for automotive assessment and safety engineering based on the realistic test. In order to main system of power module tester is consisting of powertrain system using electrical motor transferring system using chains and gears and control direction system using dual rails respectively. Based on powertrain module tester performance crashing speed relative angle between target and distance before crash are regarded. Nevertheless the result of testing performance was conducted to statistic hypothesis test by Mean Absolute Deviation: MAD Standard Deviation: SD Mean Square Error: MSE Mean Absolute Percent Error: MAPE and Root Mean Square Error: RMSE. The results of this approach discovered that the crashing speed was the highest error with 96% and the lowest was distance before crash. Furthermore it was corresponding to the statistic hypothesis test. However the result of the error was influence of the rails distance which limit by funding. In case of crash energy the mean of energy was appeared on 10.978 J. Whereas the tendency of variable was similar to polynomial equation.
การศึกษาตัวแปรที่มีผลต่อสมรรถนะการฉีดเชื้อเพลิงของหัวฉีดรถยนต์ที่ใช้น้ำมัน ไบโอดีเซล และ น้ำมันไพโรไลซิส
The purpose of this research is to study on variables affecting fuel injection performance of biodiesel fuel injection and pyrolysis fuel. To test for variables affecting the fuel injection performance of biodiesel fuel injectors and pyrolysis fuel. By experimenting and modeling using computer programs to compare results. Finally for to use the information in the design of the car nozzle to work well with Biodiesel and pyrolysis fuel. The tested fuels which are pyrolysis fuel Bio-diesel fuel and diesel fuel are tested by tester Anton Paar@ Stabinger Viscosmeter (model SVM 3000/G2) ASTM D341 standard. The result shown that the density of the fuel is increasing normally. However the viscosity of the diesel and biodiesel are strong increased whereas the reducing of temperature is unaffected to the pyrolysis fuel. The fuel injection performance test showed that the density and viscosity of fuel were the major variables that affected the injection performance of the fuel. In case of using pyrolysis oil Injection performance is trend to higher other fuels and cold conditions.
การเพิ่มเสถียรภาพของระบบไฟฟ้ากำลังด้วยอุปกรณ์ FACTS
At present the electrical power system has growth and more complicate. Because of the development of the economics and society. An increasing the demand of power transmission line system would be resulted in the stability and reliability. The Flexible AC Transmission System devices: (FACTS) is the equipment which can control the flow of real power. In addition it can gladly encourage the stability and reliability of the power transmission line system. This research proposed the impact of placing power electronics device to increase stability and reliability of power system in order to study the impact of Flexible AC Transmission System devices: (FACTS) devices for the resulting to stability of power system. UPFC devices model which consisted of Static Synchronous Compensator and Static Synchronous Series Compensator that worked as independent voltage source for technique to proposed control the flow of real power and reactive power as well as voltage bus in power system. Testing Simulation power flow control of 5 buses by placing unified power flow control indicated the effective compensation of real power and reactive power in power system.
การวิเคราะห์ผลทางเศรษฐศาสตร์สำหรับติดตั้งสถานีจำหน่ายไฟฟ้าย่อย
This research study is the application of Geographic Information System (GIS) for distribution substation. The main purpose is to satisfy user by planning to support the increase of load at present and in the future. Moreover increase in creditability of distribution system by increasing new substation or expand the area of exist substation. Then Geographic Information System is necessary for the mentioned reason. Geographic Information System is the process of geographical data in computer system that defined useful information and related to spatial data such as residential property house number location latitude and longitude. Geographic Information System consists of capture store manipulate analyze manage and present all types of geographical data according to user’s objective. So Geographic Information System is the utility that be useful for distribution substation project. The research is planning to use Geographic Information System for finding Break-even point between increasing new substation or expand the area of exist substation which is 2 case studies.
การพัฒนาคุณสมบัติของต้นแบบแผ่นมวลเบาจากเศษใยยางพาราและเถ้าไม้ยางพาราสำหรับประยุกต์ในระดับภาคสนาม
The development of lightweight flat sheet prototype from para rubber leaves and para para rubber wood fly ash for field work application can offer an alternative method of adding value to agricultural wastes and help to conserve the environment with green products. The natural fiber especially agricultural waste fiber is an encouraging prospect. Natural fiber composites have been used for building applications. The aim of this research was to investigate the potential use of para wood ash to producing a cement composite as an environmentally material. Material. The cement paste with 5-2 % weight of para wood ash. The specimens were cured at 25± 2 oc for 24 hours. The properties of cement composites mixed with different proportions of para wood ash were compared with Ordinary Portland Cement (OPC). In addition the morphology of para wood ash was examined by using scanning electron microscope. The density increased with the increase in the percentage of para rubber leaves from 1% 2% 4% and 6%. The finding is attributable to the enhanced packing density by the fine para wood ash particles size was found 5-10 um.Moreover para wood ash particles could arrange to fill the inter-particle voids in cement pastes which resulting to increase the compressive strength of cement paste. Consequently para wood ashes could incorporate in the construction materials to enhance the mechanical properties and durability performance of the cement composites