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Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin

DTM
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Published by Universitas Mataram

ISSN : 2088088X EISSN : 25021729 DOI : https://doi.org/10.29303/dtm.v14i1

Core Subject : Science, Engineering,

Aerospace Engineering Automotive Engineering Mechanical Engineering Physics

The Dinamika Teknik Mesin is a peer-reviewed academic journal which publishes originally research papers or simulation/computational articles in all aspect of Mechanical Engineering such as energy conversion, materials, design and production/ manufacturing. The Dinamika Teknik Mesin publishes in two issues per volume annually appearing in June and December. Due to administrative constraints, then starting in January 2018, the Dinamika Teknik Mesin publishes the volume and issue in January and July. However, starting in 2020, the Dinamika Teknik Mesin publishes issues in April and October due to the new administration.

Arjuna Subject : Teknik (semua kategori) - Teknik Mesin

Articles 452 Documents

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Pengujian variasi jumlah blade fiberglass kincir angin type horizontal untuk pemompa air garam Sifa, A.; Badruzzaman, B.; Endramawan, T.; Maolana, I.; Muhammad, A.R.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 8, No 2 (2018): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Faktor manajemen proses pembuatan garam perlu dipertimbangkan pemilihan lokasi dan musim sangat penting untuk mendukung upaya pengasinan air garam. Kincir angin yang dimiliki oleh petani masih menggunakan material kayu yang dibuat setiap tahun itu tidak efektif dilakukan dan bentuk kincir angin yang dibuat tidak sesuai dengan persyaratan tanpa mempertimbangkan kecepatan angin. Kontrol kecepatan pemompaan dipengaruhi oleh ukuran, berat dan variasi jumlah Blade serta ukuran kincir angin yang mempengaruhi produktivitas garam, untuk mengoptimalkan fungsi kincir angin pemompa air garam dengan mengubah material Blade pada kincir angin dengan menggunakan material komposit dan mengubah variasi jumlah Blade pada kincir angin dengan jumlah Blade 2,3,4 dan 6.Hasil pengujian menggunakan blower (fan) menunjukan bahwa pompa yang akan terangkat penuh hanya pada variasi jumlah Blade 3, 4 dan 6 dengan kecepatan 3,49 m/s. Sedangkan untuk hasil koefisien daya, semakin banyak jumlah Blade maka semakin besar efisiensi daya yang dihasilkan. Sehingga dari hasil simulasi dan uji lab maka penulis merekomendasikan variasi jumlah Blade 3,4 dan 6. Namun kenyataan pengujian di lab untuk variasi jumlah Blade 6 memerlukan kecepatan yang tinggi untuk awal memutarkan Blade, jadi Blade 4 yang paling direkomendasikan.

Pengaruh diameter lubang bubbles generator pada pengikatan karbon dioksida dengan larutan kalium hidroksida 4 molar Bachrudin, M.N.; Sutjahjono, H.; Ramadhan, M.E.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 8, No 2 (2018): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Bubble generator is an alternative technology for bubble producers. One of many other functions of bubble generator is as a purification tool. Type of bubble generator that's used in this research is Jet Column bubble generator. The diameter of the bubble hole generator affects the length of bubble life, the length of the bubble trajectory, the bubble shape, and the purification process absorption of CO2. The methods used in the purification process are making a solution 4 KOH molar, making purification tool, installating the output holes, gas purification process and gas testing performed repeated three times in each test process. The output bubble generator hole diameters are 0.08 mm, 0.12 mm and 0.16 mm. The result shows that the greater the diameter of the bubble hole generator of 0.12 mm makes the length of bubble life shorter, the time is 1,77 s and for the smallest hole diameter of 0.08 mm makes the length of the bubble life af about 3.21 s. The hole diameter of 0.08 mm results in the length of bubble trajectory of 1554.289 mm that is longer than that of the hole diameter of 0.16 mm. The smaller hole diameter produces bubbles with an average length of 6.441 mm and bubble diameter of 1.237 mm. CO2 gas content decreased from 26.8% to 0.00%, and levels of hydrocarbon content increased by 5540 ppm.

Analisa surface defect pada baja slab (Studi kasus di slab steel plant PT. Krakatau Steel-Cilegon) N.H. Sari; I.W. Yatra
Dinamika Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin
Publisher : Universitas Mataram

The purpose of this case study is to analyze the surface defects that occur in slab steel. Investigations and observations have been made on slab steel. Surface defects that were investigated were obtained based on survey data in slab handling. The results show that frequent surface defects are transverse crack, corner transverse crack, corner crack, longitudinal crack, porous / blow hole, and oscillation mark. Further, the type of surface defect that often occurs in steel slab is the type of corner crack. It is due to sulfur and phosphorus content on the slab steel grade are higher.

Pengaruh variasi sudut terjunan terhadap unjuk kerja pompa hydram (hydraulic ram pump) R. Sutanto; K. Wardani; M. Wirawan; S. Salman
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin
Publisher : Universitas Mataram

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 its’ 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 meters’ water weight-lift, while the lowest output debit on falling 55 ° namely 0.010 L / s 5 meters’ water weight-lift. The best efficiency is 6.103% in the falling angle of 35 ° with 3 meters’ of water weight-lift, while the lowest efficiency is 1.239% in the falling angle of 55 ° with 5 meters’ 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: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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 (ɳs), 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: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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.

Page 16 of 46 | Total Record : 452

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Mirmanto

Contact Email
dinamikateknikmesin@gmail.com

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+6282111738971

Journal Mail Official
dinamikateknikmesin@gmail.com

Editorial Address
Jurusan Teknik Mesin, FT, Universitas Mataram, Jl. Majapahit no. 62, Mataram, NTB, 83125, Indonesia

Location
Kota mataram,

Nusa tenggara barat

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Mirmanto

Contact Email dinamikateknikmesin@gmail.com

Phone +6282111738971

Journal Mail Official dinamikateknikmesin@gmail.com

Editorial Address Jurusan Teknik Mesin, FT, Universitas Mataram, Jl. Majapahit no. 62, Mataram, NTB, 83125, Indonesia

Location Kota mataram, Nusa tenggara barat INDONESIA

Abstract

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Contact Name
Mirmanto

Contact Email
dinamikateknikmesin@gmail.com

Phone
+6282111738971

Journal Mail Official
dinamikateknikmesin@gmail.com

Editorial Address
Jurusan Teknik Mesin, FT, Universitas Mataram, Jl. Majapahit no. 62, Mataram, NTB, 83125, Indonesia

Location
Kota mataram,

Nusa tenggara barat

INDONESIA