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Dinamika Teknik Mesin
Published by Universitas Mataram
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Articles
163
Articles
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Pengaruh variasi sudut terjunan terhadap unjuk kerja pompa hydram (hydraulic ram pump)

Sutanto, R., Wardani, K., Wirawan, M., Salman, S.

Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin, 10 Articles
Publisher : Universitas Mataram

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Abstract

Water is one of the factors which very important and necessary in the life of living creatures. Therefore, water must be available whenever and wherever in the quantity, timing, and sufficient quality. Hydraulic Ram Pump (Hydram) is a pump does not require external energy as the power source. The purposes of this research are understanding the influence of falling angle from the hydrant pump toward generated debit and finding the influence of the falling angle of the hydrant pump to generated efficiency. This research uses hydrant pump by the specification of tube compressor itsâ?? diameter 3 inches and a height 60 cm. the falling angle of pump are 35°, 40°, 45°, 50° and 55°. The falling-height is 1 meter  with five variations of weight-lift 3, 3½, 4, 4½, and 5 meters. The method of analysis is conducted by analyzing data obtained during the experiment, where the  results in the form of quantitative data which is presented in type of  tables and displayed in graphical form. The results of the research shows that  the best output debit on falling 35 ° namely 0.079 L / s  with 3 metersâ?? water weight-lift, while the lowest output debit on falling 55 ° namely 0.010 L / s 5 metersâ?? water weight-lift. The best efficiency is 6.103% in the falling angle of  35 ° with 3 metersâ?? of water weight-lift, while the lowest efficiency is 1.239% in the falling angle of 55 ° with 5 metersâ?? of water weight-lift.

Analisis emisi gas buang kendaraan berbahan bakar etanol

Mara, I.M., Nuarsa, I.M., Alit, I.B., Sayoga, I.M.A.

Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin, 10 Articles
Publisher : Universitas Mataram

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Abstract

Exhaust emissions of motorcycles are very harmful to the environment and to human health. Ethanol is an alternative fuel that can be used to substitute gasoline. Ethanol can be obtained from the fermentation of agricultural products that contain carbohydrates. Ethanol is a clean fuel and has high octane number so it produces less harmfull exhaust emission. In this research, a single cylinder four-stroke gasoline engine of Honda Astrea Legenda 100 cc was used to examine the fuel consumption and exhaust emission gas by varying the ignition timing (15o, 20o and 25o) before TDC and engine rotation (1500, 2500, 3500, 4500, and 6000 rpm) at the entire transmission gear (N, 1, 2, 3 , and 4) using ethanol 96% fuel. The results show that there is a reduction in the fuel consumption and exhaust emissions such as CO, HC and increase the levels of CO2 emissions by using ethanol 96% fuel at 20° before TDC ignition timing. Moreover, the lowest fuel consumption value is achieved at the ignition timing 20º before TDC at the engine speed 1500 rpm at transmission gear 4 that is 0.1 kg/h. In addition, the lowest CO emission value is 0.17 % volume at 6000 rpm engine rotation with transmission gear 4, the lowest HC emission value is 57, 67 ppm at 6000 rpm engine rotation with transmission gear 4 and the highest CO2 value is 13.86 % volume at 6000 rpm rotation with transmission gear 4.

Uji performance turbin Savonius dengan penambahan konsentrator pada aliran air

Alit, I.B., Mara, I.M., Susana, I.G.B., Sapri, S.

Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin, 10 Articles
Publisher : Universitas Mataram

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Abstract

Utilization of water energy is essentially using potential energy and kinetic energy, kinetic energy flow of water which is a transformation of gravitational potential energy is used to drive turbines or waterwheels, Savonius turbine has a good Self Starting so it can rotate the rotor even though the fluid speed is low, the same thing the speed of the water flow has a low speed. The purpose of this research is to know the influence of the number of blades on rotation of rotor (n), Torque (T), Rotor power (P), Coefficient of performance (CP), Efficiency system (Éłs), in this study the number of blades used are 2 blades, 3 blades and blades, the blades are then tested without the use of concentrator and by the addition of concentrator. The results of this study indicate that the turbine without concentrator or by using the addition of concentrator obtained the best performance on the number of blade 3 with average CP of 0.12 and 0.13 efficiency system of 9.83% and 11.75% then with the number of blades 2 with CP averaging of 0.10 and 0.11 of efficiency system of 8.73% and 11.00% and the number of 4 blades with CP averaged 0.06 and 0.07 and efficiency system of 3.91% and 4.76%. Using the addition of concentrator may increase the performance of the turbine in water flow savonius seen from the increasing value of CP and system efficiency at each number of blades tested.

Optimalisasi sistem pendingin berbasis termoelektrik berpendingin air

Girawan, B.A., Ariyanto, F.

Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin, 10 Articles
Publisher : Universitas Mataram

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Abstract

The use of refrigerator and air conditioner in human life causes increase in use of hydrocarbon and fluorocarbon each year. Hydrocarbon and fluorocarbon are hazardous subtances that can make a hole in ozone that cause increase in receive of ultraviolet on earth, that will give negative impact on human health. Thermoelectric refrigeration as a solid state heat pump is a safe solution to subtitute the used of hidrocarbons and fluorocarbons based refrigerator and air conditioner. The experiment is conducted to test a thermoelectric based refrigeration system which uses water as a working fluid. The result shows that refrigeration system will be optimum at 6V and 2.24A of electricity consumption, and 0.5 and 1 litre/minute of water flowrate. While Coefficient of Performance (COP) of the system is 0.86.

Pengeringan biji jagung menggunakan pengkondisi udara

Mulyanto, A., Mirmanto, M., Susana, I.G.B., Alit, I.B., Nuarsa, I.M.

Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin, 10 Articles
Publisher : Universitas Mataram

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Abstract

This study aims to determine the effect of air velocity on the rate of drying corn. Corn seeds were placed after the evaporator of an air conditioner, so that the air came out of the evaporator entered the drying chamber. The water in the corn was evaporated and sucked by dry cold air and then it was condensed in the evaporator. The results show that the mass of corn seeds decreases with the time; the drying rate also decreases with the time and mass-based drying rates at low air speeds are faster than at high air speed. The air conditioner can be used for drying seeds.

Karakteristik aliran laminar melewati profil persegi berdasarkan komputasi dengan skema central difference dan hybrid difference

Nurpatria, N.

Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin, 10 Articles
Publisher : Universitas Mataram

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Abstract

The characteristics of two computational schemes, central difference scheme and the hybrid difference scheme, which using identical computing parameters is investigated. The test case employed is isothermal rectangular cylinder laminar cooling to represent two dimensional incompressible transient flow. Simulation results on the first one shows a relatively higher temperature distribution with an energy diffusion contour pattern more intense. Whereas with hybrid difference, temperature are lower in average. Moreover, temperature contour is more stable. Simulation with hybrid difference indicates more converget results based on criterion of flow pattern and accuracy ratio.

Design and simulation of boat pulling system to improve productivity of the traditional fishermen in steep coastal region

Yudhyadi, I.G.N.K, Okariawan, I.D.K., Suartika, I.M., Adhi, I.G.A.K.C

Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin, 10 Articles
Publisher : Universitas Mataram

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Abstract

The Indonesian coastal line is the largest in the world and has potentially large number of coastal natural resources, such as fish, seaweed etc. However, the Indonesian fishermen, particularly the traditional ones, have always been facing the hard and mediocre life. The situation was derive a specific research whit long-term goal was an attempt to facilitate the traditional fishermens with better tools in order to increase their income. The specific target was designation and implementation of simple and applicable small boat pulling apparatus to cut down the time needed to move the fishing boat on and off shore. It is no doubth that the introduction of the tool will improve the fishermen operation effectiveness and efficiency. Furthermore, the execution of ideas, manual calculation and raw design drawing along with Autodesk Inventor simulations software has been able to produce a model assembly of boat pulling apparatus. The design prerequisite was based on the results of comprehensive series of surveys related to the West Nusa Tenggara coastal conditions which was steep coastal with slope of 15-30 degrees as well as the simplicity of design needed by the fisherman. Based on the results of static analyse with finite element analysis (FMA) and dinamic analysis, the resulting design meets the shafety design requirements. Finally, the design can be said in the safe category and can be used safely in such conditions without harming the fisherman. Finally, this apparatus will economically improve the fishermen traditional life.

Pengaruh waktu dan jarak electroplating nikel pada baja karbon rendah terhadap kekerasan permukaan

Salman, S., Sayoga, I.M.A., Okariawan, I.D.K., Sinarep, S., Sutanto, R., Wiranata, A.

Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin, 10 Articles
Publisher : Universitas Mataram

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Abstract

Electroplating is the process of coating an object with other metals that utilizes electricity in electrolyte liquid. In this research the carbon steel as anode material was coated by steel using nickel as catode.  The electroplating times and distances of anode catode were varied 6, 9, and 12 minutes and 150, 200, 250 mm. The hardness of the coated materal was evaluated later on by using micro vikers hardness testing. The result indicates that increasing the electroplating time rises the hardness values. The effect of the electroplating time on the harness is significant while the effect of the electrode distance is not.

Analisis pengaruh profil sudu dan jumlah sudu terhadap unjuk kerja turbin angin poros horizontal pada daerah kecepatan angin rendah

Wiratama, I.K., Okariawan, I.D.K., Yudhyadi, I.G.N.K, Mara, I.M., Juliansah, A.

Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin, 10 Articles
Publisher : Universitas Mataram

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Abstract

Wind Energy is one of the renewable energy sources, therefore utilizing wind energy during this time is very wide. Indonesia has enormous wind energy potential with wind speeds between 2 m/s to6 m/s, and especially in the Nusa Tenggara region can reach wind speeds> 5 m/s. To enable rising solar energy (10 kW) and (10-100 kW).This research was conducted to obtain the performance characteristics of horizontal axle wind turbine with variation of blade profile and number of different blades in each test. Wind source is obtained with the help of wind power 7 m/s wind speed. The shape of the blade that is used there are four variations of the big taper, half thin small, half tapered and small taper. The test is also carried out with variations of the blade amounts of 3, 4, 5 and 6.The results are shown in the graph of the number of blades against the rotation of the rotor, the amount of the blade to the rotor rotation after braking, the amount of the blade to the rotor power, the amount of the blade to the torque, the amount of the blade to the cpR and the amount of the blade against the Speed Ratio Tip (TSR). The maximum rotor rotation speed is generated on the form of a large tapered blade with an amount of 3 blades of 865.76 rpm. The maximum rotor and torque power is generated on the form of a large tapered blade with an amount of 4 blades which is 182.01 Watt and 3.25 Nm. Maximum CpR is produced on the form of a large tapered blade with an amount of 4 blades which is 0.48 as a result of TSR of 8.69. So of all variations done, the best result results on a large tapered blade with 4 blades

Sampul Dinamika Teknik Mesin, vol. 9, no. 1, Januari 2019

Mirmanto, M.

Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin, 10 Articles
Publisher : Universitas Mataram

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Abstract

Sampul Dinamika Teknik Mesin, vol. 9, no. 1, Januari 2019