JURNAL MESIN TEKNOLOGI
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Rancang bangun sistem monitoring dan controlling penyiraman tanaman kangkung berbasis internet of things
Full text linkThe high market demand for water spinach can be a great opportunity to improve the local community's economy. The distribution of water to the kale plants must be done regularly and evenly, while the watering activities of the kale plants by the farmers are still done manually by carrying 20 liters of water. The problem so far is that the farmers water the kale plants by repeatedly carrying water on their backs. so it is necessary to have a control and monitoring system to make it easier for farmers to water the water spinach plants using an internet of thngs system to open and close with sensors that are sent to the database and then displayed in the form of tables and graphs. The results show that the control and monitoring of water sprinkling was successful according to the programmed water discharge
Design of a single screw extruder machine for 3d printing filament production application
Full text linkThis study aims to determine the optimal 3D Printer filament extruder machine design, to determine the design of the extruder components for filament production, to determine the single screw design used for filament production. The research method used is creating flow chart, the result of the research is the calculation of the diameter of the 3D Printer filament of 1.77 mm, by measuring the diameter of the filament by taking a 2 meters long sample to be measured every 10 cm. the most influential components in this research are diameter, length of single screw extruder, length of filament winding process, production capacity and total electric power. With a screw speed of 5 RPM, 1.5 kg of ready-to-use 3D printer filament is produced within 1 hour of production. So there, is an error between the calculation and the real condition of 15%
Increasing the performance of diesel motors by increasing the temperature of the diesel
Full text linkThis research aims to enhance the efficiency of diesel engines by optimizing the combustion process. One of the key factors in engine efficiency is the quality of the fuel-air mixture inside the combustion chamber. Imperfect combustion leads to high fuel consumption and low engine performance. Therefore, this study employs an experimental research method to investigate the influence of preheating the diesel fuel before entering the high-pressure pump on the formation of finer fuel mist particles and a more homogenous fuel-air mixing process. A series of experiments were conducted in this research by varying the temperature of the preheated diesel fuel and measuring relevant parameters related to combustion and engine performance. The results of this study demonstrate that preheating the diesel fuel before it enters the high-pressure pump leads to an improvement in the quality of the fuel-air mixture and enhances combustion efficiency. As a consequence, there is an increase in engine power and a reduction in optimal fuel consumption. In conclusion, the use of preheated diesel fuel to enhance the combustion process can be an effective solution to optimize the performance of diesel engines and reduce fuel consumption. This research contributes significantly to finding alternatives to address the issue of high fuel consumption in diesel engine-based vehicles
Pengaruh quenching terhadap uji kekerasan dan uji impact disc brake cessna grand caravan 208b
Full text linkDisc brake is a disc in the braking system (brake system) which is located on the landing gear. During braking, friction occurs between the disc brake and brake lining, resulting in high heat and deformation resulting in decreased service life of the disc brake. To overcome this problem, a research was conducted by providing quenching heat treatment using several cooling media, namely sea water, well water, oil SAE 40, and then carried out a vickers hardness test and a charpy impact test in order to determine the strength of the disc brake material. The results of this study show changes in the characteristics of the material that has been treated with heat quenching. Quenching produces a hard but brittle martensite phase. Quenching using seawater cooling resulted in the highest hardness of 584 VHN or an increase of 71%. The results of the Charpy impact test show that the highest impact price on raw material is 0.801 J/mm2 and the impact price on quenched material has decreased. This is due to the formation of a large amount of martensite phase, so that the quenched material produces high hardness and is brittle
Observation of macro surface and gear mass of 3d printing machine using pla filament
Full text link3D Printing Machine is a machine that works with the basic principle of CNC, namely the movement of the machine in making the workpiece which is regulated by the G code in 3 coordinate axes x, y, and z. Based on how it works, 3d printing machines are classified into 7, namely, Vat photopolymerization, Material Extrusion, Powder-Bed Fusion, Sheet Lamination, Binder Jetting, Material Jetting, Directed Energy Deposition. The results of the research on 3d Printing Material extrusion this time using PLA material with a machining diameter of 1.75mm, nozzle distance with bed 0.1mm, nozzle diameter 0.4mm, layer height 0.12mm, nozzle temperature 2000C, bed temperature 600C, printing speed 80mm/s. The experimental results found problems such as clogging, the filament does not stick to the bed, the filament has a different freezing point, thus affecting the geometry of the workpiece to be printed. For the mass of all printed workpieces after measuring the mass with no significant changes, it is ensured that the problem originates from variables related to the printing of each layer in the form of printing speed, bed temperature, nozzle temperature, and system temperature
Analisis briket fiber mesocarp kelapa sawit metode karbonisasi dengan perekat tepung tapioka
Full text linkThis research aims to develop solid waste produced by oil palm plantation processing in the form of palm oil mesocarp fiber. Utilization which is usually only as boiler fuel in a Palm Oil Mill. Utilization of mesocarp fiber waste is to reduce waste, has a large heating value, and has a selling value. In the process of making mesocarp fiber briquettes, raw materials are provided, drying, charcoal (carbonization), filtering, forming 100 gr of charcoal with 150 ml, 200 ml, 300 ml of water solvent with tapioca starch adhesive (50 gr), and drying. The results of this research were briquettes with 150 ml solvent with a water content of 7.6%, an ash content of 22.52%, a burning time of 143 minutes, a burn rate of 0.21 %. The 200 ml solvent, namely: water content of 5.7%, ash content of 11.28%, burning time of 77 minutes, burning rate of 0.38 %. And in the 300 ml solvent, namely: water content of 5.2%, ash content of 16.84%, burning time of 67 minutes, burning rate of 0.36 %
Fabrication and simulation studies on sound absorption coefficient of natural microfibers reinforced silicone rubber
Full text linkSilicone rubber (SR) is known as stable and able to get through an extreme environment. Moreover, the combination of SR and natural fiber as the composite for the sound absorption application is still limited. For this reason, this study was aimed to fabricate the natural fiber-reinforced porous SR for the sound absorption material. Then, the composites were simulated using multilinear regression method to predict the sound absorption coefficient and its factor influence. The composite fabrication was started with the alkalization of oil palm fiber treatment. Furthermore, the porous SR were prepared using NaCl filler to form the pores. Then, the specimen containing NaCl was soaked in warm water and all specimens were dried at 110 °C to remove the remaining water. The addition of fibers enhances the density value to the highest value of 1.061 g/cm3 with 6 wt% microfibers. The higher the microfiber addition led to the higher α value in low frequency, it occurred at SR/6 wt% microfibers with the α value of 0.356. Additionally, the most suitable equation with the smallest error is Equation 6 which has the RMSE and values of 0.05234 and 0.6138, respectively
Mesin ayak dua saluran dilengkapi pengarah untuk beras jagung
Full text linkSieve machine is used to separate groups of granules based on size. Most separation sieves on 2 groups of sifted/filtered grains move immediately, but the unfiltered grains are removed by the operator turning the sieve sideways or lifting the unfiltered material. In addition, the sifted material is usually poured directly on the sieve wire. This slows down the sifting process and the buildup can damage the sieve. On the other hand, sieve materials such as corn rice products, require 2 sizes of sieve wire holes. For that, do the design, made and studied the function, "The Sieve Machine’s two channel Equipped with Directions for Rice Corn". The specifications of the sieve machine as follows; has 2 sifting channels, the sieve filter can be replaced, the filter is driven by a swing arm, dynamo drive 3/4 hp, rotation 1400 rpm, the capacity for one stage is ± 44.8 kg/hour, the capacity for corn rice ± 22 kg/hour (it's time to change the sieve). The study of engine performance on several variables resulted in the smaller the angle of lightening the capacity increases, it is inversely proportional to the length of the spring and rotation. At angle 50 sieve capacity is 23.3 kg/hour, with length of the spring is 90.5 mm, and on length of spring becomes 100.5 mm, sieva capacity of 24.6 kg/hour. For angle 150, the capacity is reduced by 20.4 kg/hour. At rotation 230 rpm, 50 angle, decreased capacity, only 20.3 kg/hour, spring length 90.5 mm
A comparative study of strength and hardness of two motorcycle spoke wheels
Full text linkThe wheels are a vital component for safety in driving as well as supporting the vertical load of the vehicle when the vehicle is rotating or at rest and serves as a continuation of the rotary motion of the engine to move from one place to another. These wheels are used in a motorcycle made from ironand aluminum alloys material.We perform the tensile and hardness test to obtain their strength and hardness value. We found from our measurement that the maximum tensile stress for the aluminium and iron velg are 155.08 MPa and 277.62 MPa, respectively. The values are directly proportional with the hardness of those material, in which the hardness of iron velg is much higher than that one of aluminium velg by 521.8 VHN
Simulasi kontur distribusi suhu dan kecepatan fluida pada heat exchanger type shell and tube aliran dua stage sistem counter flow dengan computational fluid dynamics (cfd)
Full text linkThe simulation of temperature and velocity distribution contours is designed to produce output regarding the capability and reliability of the shell and tube heat exchanger system, as input in the framework of assessing system development and optimization of operating results. This research was conducted numerically with a variation of hot fluid input flow of 0.8 kg / second and a cold fluid input flow of 1 kg / second and variations in hot inlet temperatures: 60 ° C, 90 ° C, 120 ° C, cold temperature inlet variations: 15 ° C, 16 ° C, 18 ° C using the Computational Fluid Dynamics (CFD) method on the ANSYS software. In this study, the design contours of the temperature and velocity of the outlet of hot fluid and outlet of cold fluid can be determined with the following variation results: the contour of the temperature distribution of hot fluid is seen on the lowest part of the wall which has a blue color and the highest has a red color, while the cold fluid shows a temperature. the lowest is dark blue and the highest temperature is light blue. The velocity distribution contours of hot and cold fluids can be seen on the lowest part of the wall which has a blue color and the highest has a yellow green color