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Jurusan Teknik Mesin, FT, Universitas Mataram, Jl. Majapahit no. 62, Mataram, NTB, 83125, Indonesia
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Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
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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Karaktersitik pembakaran droplet minyak nabati Indonesia Winarko, W. A.; Ilminnafik, N.; Kustanto, M. N.; Perdana, D.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 12, No 2 (2022): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v12i2.540

Abstract

Research has been carried out on the combustion characteristics of Indonesian vegetable oil droplets. Currently, Indonesia is still developing CPO as a source of renewable fuel to replace diesel. The problem is, CPO is used as a food source so that it will affect food scarcity. Vegetable oils used in this study include CCPO, CJO, CCO and CCIO. The volume of the droplets tested was 1.25-1.31 ml and the drops were placed on a 0.1 mm type K thermocouple. The flame characteristics of the droplets tested included flame stability, ignition delay time, and temperature and flame height. The results showed that vegetable oils with higher viscosity produced more stable flames, but had low temperatures and short flames. This is because high viscosity vegetable oils produce less intense microbursts. While the ignition delays time of CCO is faster than CCPO even though it has the highest flash point. This happens because the polar nature of CCO can attract oxygen more strongly. In addition, the fatty acid content of vegetable oils also has a significant impact on fire characteristics. This is indicated by CCO which has a high content of saturated fatty acids and tends to produce a short flame.
Pengaruh generator HHO dan etanol terhadap performa dan emisi gas buang mesin bensin Setiawan, N.D.C.; Prasetiyo, D.H.T.; Wahyudi, D.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 12, No 2 (2022): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v12i2.518

Abstract

The large number of motorized vehicles in Indonesia cannot be separated from the rapid population growth. Fuel is one of the important components in vehicles, this is because the fuel produces heat energy to be converted into mechanical energy. So far, ordinary people only use fuel oil (BBM) based on the price per liter, assuming all fuel can be used in their vehicles. In fact, to get maximum performance and low exhaust emissions, it requires high octane fuel. The purpose of this study was to determine the effect of adding ethanol and HHO to fuel on engine performance and the resulting exhaust emissions. The test sample consisted of Pertamax fuel which was then mixed with 10% ethanol with the addition of HHO. Furthermore, the process of testing the performance of the vehicle's engine and the resulting exhaust emissions. The test results show that there is an increase in power and torque of 7.77 hp and 7.54 N.m, respectively, in the test of fuel mixing with the addition of HHO. Then the results of the exhaust gas test resulted in a decrease in CO and HC while the CO2 level increased by testing the mixing of fuel with ethanol accompanied by the addition of HHO. The average percentage scores for each test were 15.02%, 17.79%, and 16.72%.
Analisis kinerja turbin air arus bawah bentuk sudu bengkok dengan variasi material Duma, G. A.; Sule, L.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 12, No 2 (2022): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v12i2.548

Abstract

A water turbine is a device used to convert the potential energy of water into mechanical energy. This mechanical energy is then converted into electrical energy by a generator. This test was carried out experimentally using a crooked blade type with six blades and the type of water turbine used was undershoot. Various types of blade materials are plastic, aluminium, and iron. As well as varying the opening of fluid flow, namely the valve opening of 25%, 50%, 75%, and 100%. The results obtained indicate that variations in turbine blade material have an effect on turbine power and turbine efficiency The highest turbine power and efficiency was obtained at 100% valve opening with a load of 0.7 kg on plastic, iron and aluminium material. The highest turbine power is 1.16 watts for the plastic blade, the aluminium blade is 1.22 watts, and for the iron, the blade is 1.1 watts. The highest efficiency obtained for plastic blades is 50.14 % for experiment and theoretical is 5.67%, aluminium blades are 52.77% for experiment and 54.41% for theoretical, iron blades are 47.5% for experiment and 48.97% for theoretical.
Analysis of the immersion time of nettle fiber in NaOH and silane on the hardness and toughness of composite hybrid materials Suarsana, K.; Suryawan, I.G.P.A.; Sunu, P.W.; Triadi, A.A.A.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 12, No 2 (2022): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v12i2.573

Abstract

The advantages of stinging nettle fiber (Urtica dioica L.) properties as a substitute for synthetic fibers for reinforcing composite materials are its strength and light weight compared to other natural fibers. This study aims to find the mechanical properties of hybrid composites reinforced with stinging nettle fiber based on immersion treatment of the fibers with chemical solutions. The mechanical properties studied include the hardness and toughness of the hybrid composite. This paper examines the effect of fiber immersion time in NaOH and Silane coupling agent solutions at concentrations of 3% and 9% which are used as reinforcement for hybrid epoxy resin composites. Variations of fiber immersion time in NaOH and Silane solutions: 30, 60, 90, and 120 minutes. Hybrid composite was produced by hand lay-up molding method. The results showed that the highest value of hardness was 88,254 VHN and toughness was 7,459 kJ/m2 at 9% immersion. NaOH solution can remove impurities and lignin in the fiber and Silane coupling agent can form strong bonds because it has a hydroxy group. Based on the results of the study, it can be concluded that the hardness and toughness of the hybrid composite reinforced by stinging nettle fiber has higher hardness and toughness at 9% NaOH and Silane treatment with immersion time of 120 minutes.
Performance of crusher machine for crushing coconut coir into cocopeat and coco fibre Anugrah, R.A.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 12, No 2 (2022): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v12i2.517

Abstract

The abundant resources of coconut coir in Indonesia, especially a tiny village in Kulon Progo district, namely Kadigunung, hadn't been used before this research. It was thrown away and mostly just burned by the villagers. Even though it can be used to become natural organic fertilizer for agriculture, most of the population members are making a living as farmers. But there is a problem when processing to make the fertilizer, and it is the use of conventional manner to crush the coconut coir into cocopeat and coco fibre. So they needed appropriate technology and crusher machines. It is a gasoline-powered crushing device with 5.5 hp and 2000 rpm. It has 21 moving and 12 fixed blades. The research data were obtained by digital tachometer and sound level meter measurements. Other data were also measured by formula calculation. The results of this research involved the data of fuel consumption, the machine's capacity, depreciation of raw coconut coir, noise level, linear v-belt velocity, and rpm of the blade shaft. They were 1.8 L, 0.05 kg, 99.3 dB, 2π m/s, and 330 rpm, respectively. So it can be inferred that the crushing machine is a good performance.
Pengaruh suhu udara masuk terhadap massa air yang dihasilkan pada alat pemanen air sederhana Mirmanto, M.; Nurpatria, N.; Hendra, J.K.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i1.617

Abstract

An experimental investigation was performed to obtain the effect of air temperatures on the freshwater production of a simple water harvester. The amount of freshwater mass production depends on several variables, e.g. intake air temperature. For this reason, his study examined the relationship between the intake air temperature and the mass of freshwater production. The research was conducted experimentally with R134a refrigerant as the working fluid and the intake air temperatures tested were 30°C, 35°C, and 40°C. The results show that the highest freshwater mass production was 0.340 kg at the intake air temperature of 30°C. Meanwhile, the highest coefficient of performance was 9.12 at the same intake air temperature and the highest total heat transfer rate was 184.16 W at the intake air temperature of 40°C. The effect of the intake air temperature on the mass of water, coefficient of performance and the total heat transfer rate was not clear. 
Analisis pemanasan oven untuk destilasi uap-air dengan hasil panas matahari pada biji buah pala di Kabupaten Fakfak Rusdin, R.; Mustari, M.; Iswar, M.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i1.618

Abstract

Nutmeg seeds drying in Fakfak Regency still apply the traditional method, namely, placing the seeds on tarpaulins or mats under the sun. The problem is that the sun’s temperature depends on the weather. Therefore, the oven-drying method should be applied. Steam-water distillation is steam-water heat from a tube (pan) which is heated using firewood. Oven drying can be controlled in terms of temperature and duration to increase production effectiveness and efficiency. Based on the results of the oven and sunlight heating, the following moisture contents were obtained. Heating for 2 hours resulted in an average of 16.71% STDV1.99; 4-hour heating brought about an average of 16.10% STDV 1.53; 6-hour heating produced an average of 13.87% STDV 0.56; 8-hours heating turned out0 an average of 10.17% STDV 0.05; and an average of 8.57% STDV 0.42 for normal heating. According to SNI 01-0006-1993, from the moisture-contents testing for 3 quality categories, the moisture content of 10.54% was for quality 1 (ABCD), 8.64% for quality 2 (RIMPEL) and 11.92% for quality 3 (BWP). Accordingly, the SNI quality requirements for the maximum moisture content of nutmeg seeds was 10%; quality 1 and quality 2 met SNI requirements. The research revealed that, according to SNI, the 9-day solar heating resulted in a quality of category 2 meanwhile the 9-day oven-heating on the nutmeg seeds produced a quality of category 1
Uji performansi motor listrik sebagai penggerak kendaraan listrik Mara, M.; Yudhyadi, I.G.N.K.; Adhi, I.G.A.K.C.; Setyawan, P.D.; Triadi, A.A.A.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i1.607

Abstract

Sifat tekan komposit sandwich dengan inti beton cellular diperkuat pin bambu sebagai bahan panel ringan Catur, A.D.; Sutanto, R.; Salman, S.; Sari, N.H.; Wijana, M.; Prijaya, M.T.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i1.591

Abstract

Cellular lightweight concrete as sandwich composite core has the advantage of its density, with the presence of foam which makes it lighter. However, the presence of foam reduces its strength. Reinforcement with bamboo pins was carried out to increase the compressive strength of the sandwich composite. Bamboo pins connecting the composite skin reinforce the cellular lightweight concrete at an angle of 900, 700,650 to the composite skin. With the addition of bamboo pins, it increases the compressive strength of the sandwich composite in both flat and edge directions.
Prediksi kekasaran permukaan baja S45C terhadap parameter pemesinan dan getaran pada proses bubut menggunakan metode artificial neural network Bismantolo, P.; Utama, F.P.; Kurniawan, A.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 13, No 1 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i1.605

Abstract

Based on machining characteristics, this study gives surface roughness modeling for machine parts. The artificial models used the Artificial Neural Network (ANN) modeling approach and multivariable regression analysis were used to create the prediction model. S45C steel was one of the materials utilized in this research. With a depth of cut 0.5 mm, the parameters are spindle (n) of 165, 330, 585, and 1170 rpm and feed (f) of 0.2 mm/rev. Utilizing TIBCO software, surface roughness values will be predicted. Equations derived from multivariable linear regression serve as the study's findings. At 1170 rpm spindle rotation and 0.5 mm of cut depth, the lowest surface roughness measurement of 1.114 (μm) was recorded. At spindle speed 585 and a cut depth of 2.0 mm, a roughness value of 2.999 (μm) was recorded as the maximum value. Roughness rises at spindle speeds between 585 and 900 rpm when cutting at shallower depths. The third modeling had the smallest error value, which was 11.21%, and surface roughness value using an artificial neural network with five simple multi-layer models.

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