Articles
158 Documents
<![CDATA[Distillation of Bioethanol From Nypa Using Flat Plate Solar Collector ]]>
<![CDATA[Gerard Antonini Duma]]>;
<![CDATA[Doddy Suanggana]]>
<![CDATA[ Jurnal Teknik Mesin (JTM) Vol 8, No 1 (2018) ]]>
Publisher : <![CDATA[LP2M - Institut Teknologi Padang ]]>
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<![CDATA[The study aims to investigate the production of bio-ethanol derived from sugar palm using flat plate solar collector, the bio-ethanol level based on different sugar palm liquid treatments, heat transfer in the collector, and compare the results of the two procedures of testing. The study method used is experiment by testing the bio-ethanol produced with two different testing methods. The experiment indicates that the first procedure yields 68 cc and the average production is 17 cc, with an ethanol concentration of 62,9%. The second procedure generate 49 cc and the average production is 16,3 cc with ethanol concentartion of 60,9%]]>
<![CDATA[Toughness and Fracture Surface of Frame of Drone Based on Composite from Waste Materials ]]>
<![CDATA[Mastariyanto Perdana]]>;
<![CDATA[Rozi Saferi]]>;
<![CDATA[Putri Pratiwi]]>
<![CDATA[ Jurnal Teknik Mesin (JTM) Vol 9, No 2 (2019) ]]>
Publisher : <![CDATA[LP2M - Institut Teknologi Padang ]]>
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<![CDATA[Application of green composites material is aerial egineering. Advantages of green composites material are lightweight and relatively strong. This reason that makes green composites can be applied in Unmanned Aerial Vehicle (UAV). In this study, material of quadcopter frame was composites material that made of waste material from styrofoam, bagasse and eggshell. Styrofoam was used as binder of composite material. Bagasse and eggshell was used as reinforcement in green composite material. The investigation focused on effect of volume fraction on flying time of quadcopter that made of green composites material. This study showed that addition of eggshell powder in composites up 25% by volume fraction, result in decreasing the flying time of quadcopter. Addition of eggshell powder in composites up 25% by volume fraction, result in decreasing the porous of green composite. Porous structure affect the flying time of quadcopter based on green composite materials that made of waste material from styrofoam, bagasse and eggshell. Green composite based on styrofoam, bagasse and eggshell can be applied in Unmanned Aerial Vehicle (UAV) materials.]]>
<![CDATA[Design, Simulation and Kinematics Analysis of Robot Manipulator with PPRR Joints Configuration ]]>
<![CDATA[Asmara Yanto]]>;
<![CDATA[Ahmad Jeni]]>
<![CDATA[ Jurnal Teknik Mesin (JTM) Vol 9, No 2 (2019) ]]>
Publisher : <![CDATA[LP2M - Institut Teknologi Padang ]]>
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<![CDATA[This research aims to create an innovation in the design of Robot Manipulator with joint configuration in the form of two prismatic movements and two revolute movements (PPRR), serially. The Robot Manipulator design is validated by performing kinematics simulation and analysis of a trajectory. To simulate the movement of this Robot Manipulator, the end-effector Robot Manipulator is equipped with stationery in the form of a marker to follow the trajectory of the block letters. Robot Manipulator consists of four links. Link-1 moves prismatically on a horizontal linear sliding rail system (LSRS) with a rail length of 450 mm. The center point of Link-1 can move from a position of 75 mm to 375 mm in the X-axis direction. The Y-axis parallel links with a length of 80 mm move prismatically on a vertical linear rail system (LSRS) with a rail length of 60 mm. The conditioned link-2 can move from 140 mm to 180 mm in the direction of the Z-axis. Link-3 revolves in the X-Y plane with a range of 0o to 180o. Link-4 revolves in the X-Y plane with a range of 0o to 180o. From the simulation and kinematics analysis of Robot Manipulator with trajectory in the form of ITP block letters it can be concluded that the Robot Manipulator is indicated to be able to follow the trajectory well.]]>
<![CDATA[Effect of Fibres Length on Acoustic Properties of Betel Nut Husk (Areca Nut Husk) Fibers–Reinforced Epoxy Composites ]]>
<![CDATA[Putri Pratiwi]]>;
<![CDATA[Hendriwan Fahmi]]>;
<![CDATA[Georgery Saputra]]>
<![CDATA[ Jurnal Teknik Mesin (JTM) Vol 9, No 2 (2019) ]]>
Publisher : <![CDATA[LP2M - Institut Teknologi Padang ]]>
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<![CDATA[The objective of this research is to determine the acoustic properties (sound absorption coefficient) in a various length of betelnut fibers. Betel nut fibers were obtain from local plantation in Padang as agro waste material and potentially used as sound absorber. In this study, we used betel nut fibers as a filler of composites and epoxy resin as a matrix using the ratio of volume fraction of 40% : 60%. We used three variations of fibers length such as 1 cm, 2 cm and 3 cm. The sound absorption coefficient of composites was studied using impedance tube method with 1000 Hz, 1500 Hz, 2000 Hz, and 2500 Hz frequency. The results showed that composite using 3 cm fibers length of betelnut husk would give the optimum sound absorption coefficient at 1500 Hz frequency, but composites with 1 cm fibers length showed a great performance as sound absorbing materials at various sound frequencies that have been tested. From this research shown that betelnut fiber composite give the optimum sound absorption coefficient at various fibres length and can be used as sound absorption materials, based on ISO standard 11654:1997.]]>
<![CDATA[Static Analysis of Structural Structure of Vertical Wind Tunnel (VWT) Design By Catia V5R21 ]]>
<![CDATA[Muhamad Jalu]]>
<![CDATA[ Jurnal Teknik Mesin (JTM) Vol 8, No 2 (2018) ]]>
Publisher : <![CDATA[LP2M - Institut Teknologi Padang ]]>
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<![CDATA[Vertical Wind Tunnel (VWT) is a wind tunnel application that is directed vertically upwards, so that the air impulse is applied as an alternative to people (athletes) feeling the sensation of flying, like parachuting when jumping at altitude out of an airplane. VWT will certainly reduce the potential for accidents, improve the efficiency of skydiving, and improve the quality of skydiving athletes. To ensure the design of the VWT structure is safe, it is necessary to test the strength of the structure with load = 55212.16 Newton and load thrust = 46826.3516 Newton. VWT structure uses 2 types of steel material, namely the type of Steel A36 and Steel A441 because this type has the appropriate material property other than that it is very easy to get on the market. then simulated using CATIA V5R21 software. So that the obtained value of Steel A36 Margin of Safety (MS) is 2.79 (load) and 3.48 (load thrust). For Steel A441, the MS value is 4.52 (load) and 5.51 (load thrust), from all the two materials producing an MS value 1, indicating that the design of the VWT structure is said to be safe.]]>
<![CDATA[Design and Performance Horizontal Axis Wind Turbine Taper Type ]]>
<![CDATA[Arfidian Rachman]]>;
<![CDATA[Putri Pratiwi]]>;
<![CDATA[Lucky Ashari]]>
<![CDATA[ Jurnal Teknik Mesin (JTM) Vol 9, No 2 (2019) ]]>
Publisher : <![CDATA[LP2M - Institut Teknologi Padang ]]>
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<![CDATA[The potential of wind energy in Indonesia is sufficient for the development of renewable energy based on wind turbine, because the average wind speed ranges from 3-12 m / s. The wind that blows is dominated by West, Southwest, and Northwest winds with speeds sometimes reaching 2.5 m / s to 20 m / s. The designed wind turbine is a Taper type blade where the comparison of the tip chord to the base is 1.3: 1, with a blade length of 1 m. Where the blades are designed to be able to spin in high-speed winds and to maximize the efficiency that can be obtained. The design result that the highest peak is 59% at TSR 7 and the blades start to spin in winds of 8.7 m / s and at winds of 12 m / s the power produced reaches 3255 watts.]]>
<![CDATA[Microstructures Changes in Aluminum 6061 Due To Oxidation before MMAW Welding ]]>
<![CDATA[Anrinal Anrinal]]>;
<![CDATA[Asmara Yanto]]>;
<![CDATA[Rahmad Hidayat]]>
<![CDATA[ Jurnal Teknik Mesin (JTM) Vol 10, No 1 (2020) ]]>
Publisher : <![CDATA[LP2M - Institut Teknologi Padang ]]>
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<![CDATA[This work aims to provide an overview of the changes in the microstructure of Aluminum 6061 because it was oxidized prior to MMAW welding. The research was conducted by first allowing aluminum 6061 to oxidize in the air (atmosphere) with a time variation of 0, 120, and 240 hours. The MMAW welding process uses a 1G welded seam without a 1G position, Grilumin 14 electrode, AWS A5.3-99 specifications, E4043 3.2 mm in diameter, with a DC current of 90 Amperes. The welding results show that the weld surface appears sooty and rough spots where the longer the oxidation occurs produces more soot and spots, while the results of the microstructure examination on the weld area and the HAZ area show that the micro structure of the weld area and the HAZ area experiences increased grain size.]]>
<![CDATA[Effect of Special Tool Completeness during Regular Service at Two Official Honda Workshops (HCM & CPM) In Padang on Customer Satisfaction ]]>
<![CDATA[Wahyu, Dian]]>
<![CDATA[ Jurnal Teknik Mesin (JTM) Vol 8, No 2 (2018) ]]>
Publisher : <![CDATA[LP2M - Institut Teknologi Padang ]]>
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<![CDATA[AHASS HCM and CPM workshops are Honda's official workshops separated by a distance of only 1.6 km located in the city of Padang. The number of customers in these two workshops is very much different, even though the HCM workshop has a better form of building and facilities compared to the CPM workshop. Research needs to be done to see the factors that influence customer interest in choosing a workshop. Performing regular service requires equipment. Tools that are often overlooked are special tools. If the workshop does not have special tools, the mechanics will have difficulty in the process of dismantling and installing or adjusting, so that the impact on the performance of the motorcycle that has been serviced. Research on the effect of the completeness of special tools during regular service at two official Honda workshops (HCM & CPM) in Padang on customer satisfaction has been successfully carried out and the results show a significant difference. The measurement of the influence of special tools on customer satisfaction is measured using the SERVQUAL method, so that service quality in both workshops can be seen. The SERVQUAL method uses several dimensions (tangible, reliability, responsiveness, assurance, empathy) which will then be translated into 16 variables as indicators to create programs that can control services oriented to customer satisfaction. The results showed that both workshops (HCM and CPM) had a gap between perception and expectations in each dimension. The average total gap for each dimension is -0.44486 for the HCM workshop and -0.2902 for the CPM workshop. This shows that the quality of service expected by customers has not yet been achieved in both workshops, but the quality of service from CPM workshops is much better compared to HCM workshops. This causes more CPM workshop customers compared to HCM repair shops.]]>
<![CDATA[Exergy Study of Steam Flash Cycle & Kalina Cycle at Waste Heat Recovery Power Generation Operation System ]]>
<![CDATA[Arfidian Rachman]]>;
<![CDATA[Benny Arianto]]>
<![CDATA[ Jurnal Teknik Mesin (JTM) Vol 10, No 1 (2020) ]]>
Publisher : <![CDATA[LP2M - Institut Teknologi Padang ]]>
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<![CDATA[Waste Heat from cement kiln factories has begun developed to power generation in the world. Waste Heat Recovery Power Generation (WHRPG) is the one of power generation with use hot gas from cement kiln to increase water temperature in After Quenching Cooler (AQC) Preheater (SP) Boiler, and change water into superheated steam stage. Superheated Steam will delivery in to turbine and drive the generator. The quality of hot gasses will affect the turbine work and power generator. The temperature of hot gasses frequently at below 340°C. It will cause turbine not work in optimally condition. This research done for study using ammonia – water on kalina cycle at WHRPG to resolve the problem in WHRPG. From this study found that value of total exergy destruction at Steam Flash Cycle is 19,97 MW with power generator 7,011 MW. While at kalina cycle, total exergy destruction the kalina cycle is 18,33 MW with power generator at 8,459 MW.]]>
<![CDATA[A Mathematical Model of Desiccant Wheel in Desiccant Cooling ]]>
<![CDATA[Arfidian Rachman]]>
<![CDATA[ Jurnal Teknik Mesin (JTM) Vol 10, No 1 (2020) ]]>
Publisher : <![CDATA[LP2M - Institut Teknologi Padang ]]>
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<![CDATA[The desiccant wheel performance of desiccant cooling system components is very important whose function is to regulate air humidity levels as well as to the capability, size and cost of the entire system. Mathematical models for predicting the performance of desiccant wheels in the development of mathematical models is one of the effective methods for analyzing the performance of wheel this moisture-reducing. This mathematical model can also be used in guiding system operation, delivering experimental results and automation in designing this cooling system. The purpose of this paper is to provide an overview of efforts to mathematically model the process of heat transfer and mass transfer that occurs in the moisture-reducing wheel. The desiccant wheel model built here is a gas and solid system including basic principles, heat and mass transfer mechanism and model building. The model is based on ideal assumptions, equations, additional conditions and the method of solution and also the main results. The gas-solid model is a more precise and more complex model than the other models. From these results the evolutionary process of the mathematical model is obtained and the aspects of calculation of pressure loss, air leakage, and optimal rotation speed of the drying wheel / dehumification.]]>
