The Design of Experimental Production of Briquette Solid Fuel from Oil Palm Fiber and Kernel Meal Residual

The objective of this research was to study the experimental design for the production of briquette solid fuel from oil palm fiber and kernel meal residue by Factorial Design. Independent variables consisted of mixture ratio of oil palm fiber to oil palm kernel meal residue, percent of coordinate volume and the briquette forming pressure whereas the dependent variables were composed of compression resistance value, impact resistance value and combustion rate. The results of the experimental design showed that at 20 tons of forming pressure, the mixture ratio of kernel meal residue to oil palm fiber 80:20 and 20 percent of coordinate volume provided the best compression resistance value of 2,636 Newton with 85.75% impact resistance value, combustion rate of 1.71 Grams/Minute, heating value of 4386.3 Calories/Gram and the density of 700 Kilograms/Cubic Meter

The Influence of Parameters Affecting Mechanical Properties and Microstructures of Semi-Solid-Metal 7075 Aluminum Alloy by Using Friction Stir Spot Welding

This research aims to study the influence of parameters that affect the mechanical properties of semi-solid-metal 7075 aluminum alloy with friction stir spot welding process. The parameters fort this experiment such as rotation welding speed at 380, 760, 1240 and 2500 rpm and rotation welding time at 60, 90 and 120 seconds were employed respectively. The study found that the welded specimens at all the conditions can be welded very well. Moreover, friction stir spot welding process showed that the hardness in weld zone had an average value at 79.83 HV which is lower than the hardness of the base metal. The shear tensile strength of the welded specimens had the average value approximately 194.20 MPa at rotation welding speed of 1240 rpm, rotation welding time of 120 seconds and plunge of depth of 2 millimetres. The microstructure in the weld zone and thermal mechanical affected zone were deformed permanently. Therefore, friction stir spot welding process of this aluminum alloy provided good effects on mechanical properties. Statistical analysis showed that the coefficient of determination R-square was equal to 93.50 percent. This means that the variations of the experiments were controllable, such as equipment or other factors in the experiment. For the remaining, only 6.50 percent was uncontrolled factors

Design Analysis of Overhead Crane for Maintenance Workshop

This research aimed to study the design of the overhead crane of a small fishing boat maintenance factory according to the building and functional requirements of the project based on the ASME B30.2-2005 Standard. The results of the study showed that the design of the runway with steel structure BS: 5950: 2000 grade s460 provided vertical and horizontal deflection values of 4.96 and 16.62 respectively that did not exceed the allowed deflection. It is strong enough for use in construction when the stresses on the beam bridge were analysed by the finite element program compared with the strength of the reinforced steel providing a safety value of 1.83

Design Analysis of Overhead Crane for Maintenance Workshop

This research aimed to study the design of the overhead crane of a small fishing boat maintenance factory according to the building and functional requirements of the project based on the ASME B30.2-2005 Standard. The results of the study showed that the design of the runway with steel structure BS: 5950: 2000 grade s460 provided vertical and horizontal deflection values of 4.96 and 16.62 respectively that did not exceed the allowed deflection. It is strong enough for use in construction when the stresses on the beam bridge were analysed by the finite element program compared with the strength of the reinforced steel providing a safety value of 1.83

การประเมินอัตราการกัดกร่อนของผิวเชื่อมพอกไส้ฟลักซ์เกรด x111-t5-k4 และ e71t-1ch8/t/9m-d

วารสารวิชาการและวิจัย มทร.พระนคร, 11 (1) : 23-33After a propeller shaft was damaged from chloride in sea water, it has been fixed by MAG welding process with flux cored wire. Its service life after welded depends on the corrosion resistance of the weld metal. This research aimed to compare the corrosion resistance of two different weld metals between X111-T5-K4 and E71T-1CH8/T/9M-D flux core wire. The test specimens were prepared according to the ASTM G1-103 standard and tested by salt spray test, conforming to the ASTM B 117 standard. The result of the test showed that the corrosion rate of the weld metal using X111-T5-K4 flux cored wire is lower than the weld metal of E71T-1CH8/T/9M-D flux cored wire, which was 0.21 and 0.32 mm2/hr., respectively. The mass loss at 24 hours of E71T-1CH8/T/9M-D, X111-T5-K4 flux core wire were 0.32 and 0.48 grams, respectively. Therefore, enhancing the service life of propeller shaft from chloride corrosion should use X111-T5-K4 flux core as weld metalRajamangala University of Technology Phra Nakho