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Rekayasa Mesin

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Published by Universitas Brawijaya

ISSN : 23381663 EISSN : 24776041 DOI : 10.21776/ub.jrm

Core Subject : Engineering,

Mechanical Engineering

Rekayasa Mesin is published by Mechanical Engineering Department, Faculty of Engineering, Brawijaya, Malang-East Java-Indonesia. Rekayasa Mesin is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. Rekayasa Mesin accepts submission from all over the world, especially from Indonesia. Rekayasa Mesin aims to provide a forum for national and international academicians, researchers and practitioners on mechanical engineering to publish the original articles. All accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage. The scope of Rekayasa Mesin are the specific topics issues in mechanical engineering such as design, energy conversion, manufacture, and metallurgy. All articles submitted to this journal can be written in Bahasa and English Language.

Arjuna Subject : -

Articles 965 Documents

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Pembakaran Premixed Minyak Nabati pada Bunsen Burner Type Silinder La Muhaya, Syamsul Bahri; Wardana, ING.; Widhiyanuriyawan, Denny
Jurnal Rekayasa Mesin Vol 6, No 1 (2015)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

In the premixed combustion wave propagation combustion occurs is called the flame front. Premixed flame will propagate at the speed of moving towards the reactants unique. If the speed of the reactants is equal to the speed of propagation of fire, the fire (reaction zone) will be stationary. It is necessary to follow up on the influence of equivalence ratio (Ï†) varied with laminar flame speed (SL) in the premixed combustion of vegetable oil (virgin coconut oil, jatropha and cotton seeds). Research using experimental (true experimental research), which is put through direct observation by the equivalence ratio (Ï†), 1.5, 1.6, 1.7 and 1.8 m / l, to determine the causal relationship. Then the results showed a pattern of fire Bunsen burner pure coconut oil with equivalence ratio (Ï†), namely: 2.00, 1.87, 1.78, and 1.66, jatropha oil with equivalence ratio (Ï†) are: 1.73, 1.62, 1:52, and 1:44 and seed oil kapok with equivalence ratio (Ï†) are: 1.76, 1.65, 1:55, and 1:46, the richer the air the flame pattern that looks smaller and smaller until the blow off. This happens because the richer the air causes the fuel has an air excess so that the fuel (fuel) burning diffusion semakain reduced and cause combustion close to the surface of the tip of the nozzle Bunsen burner to high flame formed shorter until there blow off or extinguished.

Karakteristik Pembakaran Difusi Campuran Biodiesel Minyak Jarak Pagar (Jathropha Curcas L) - Etanol/Metanol Pada Mini Glass Tube Al Banjari, M. Arsad; Yuliati, Lilis; Sonief, Achmad Asâ€™ad
Jurnal Rekayasa Mesin Vol 6, No 1 (2015)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Diffusion is a combustion which is performed on a diesel engine, biodiesel as a biofuel is used to replace fossil fuels. Many studies have looked at the effect of a mixture of biodiesel fuel-ethanolmethanol-diesel with different percentages in terms of engine performance and exhaust emissions, but have never done research on the characteristics of combustion and interface evaporation. This paper discusses how the comparison of the characteristics of the diffusion combustion mixture of biodiesel and biodiesel-ethanol-methanol in mini glass tube. The results showed that the use of biodieselethanol occurred many explosions flame and lift off than biodiesel-methanol. Biodiesel-ethanol evaporation interfaces tend to be flat because there were many explosions so that the liquid fuel out of the burner. The use of biodiesel-methanol flame produces more stable than biodiesel-ethanol.

Pengaruh Penggunaan Katalis (Zeolit) Terhadap Kinetic Rate Tar Hasil Pirolisis Serbuk Kayu Mahoni (Switenia Macrophylla) Kumara, Dody Candra; Wijayanti, Widya; Widhiyanuriyawan, Denny
Jurnal Rekayasa Mesin Vol 6, No 1 (2015)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

This research was conducted to find out the influence of the use of a catalyst (zeolite) against kinetic rate results of tar pyrolysis of sawdust mahogany. research process undertaken experimentally with temperature 523K and 873K on the heating rate 673 K/hour. pyrolysis is done for 3 hours with wood powder particle size 0,5 â€“ 1 mm. before use activated zeolite in advance by means of heated at a temperature of 400 Â°c for 1 hour. the results showed the value of kinetic rate tar with zeolites greater than without zeolites , where the value of the kinetic rate equation obtained i.e. ð‘˜ = 185,49. ð‘’ âˆ’2779/ð‘‡ (heating rate 673 K/hour without zeolite) and ð‘˜ = 93,037. ð‘’ (heating rate 673 K/hour with zeolite). The results of the validation shows the value addition in the calculation of the volume is already approaching the actual value.

Pengaruh Pengunaan Katalis Terhadap Laju Dan Efisiensi Pembentukan Hidrogen Purnami, Purnami; Wardana, ING.; K, Veronika
Rekayasa Mesin Vol 6, No 1 (2015)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Hydrogen was produced by steam reforming of kapok seed oil. CuZn as catalyst helps accelerate separation and increase production of hydrogen gas. This catalyst is viable and has high stability. Hydrogen gas was produced through 3 steps of catalyzing by mixed kapok seed oil and water with ratio of 1:1, 1:3 and 3:1. Heating temperature of catalyst at 250 C was selected. The rate and efficiency in forming of hydrogen gas were evaluated. From present investigation show that the more steps of catalyzing resulted in higher products, production rate, and efficiency in forming of hydrogen gas. Using 3 steps of catalyzing has promoted higher products, production rate, and efficiency in forming of hydrogen gas compared to 1 step and 2 step of catalyzing.

Efisiensi Sistem Pemanasan Air dengan Penerapan Selubung Bertingkat pada Perforated Burner Agung Sugeng Widodo; Francisca Gayuh Utami Dewi
Jurnal Rekayasa Mesin Vol. 9 No. 1 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

One of the causes of inefficiency in the heating system by using a gas stove is radiation heat transfer. The application of stratified sheath is expected to reduce the heat loss. In this study an investigation conducted on a gas stove type perforated burner, by adding a stratified sheath. The parameters such as energy absorbed by water and energy produced by fuel are used to measure the performance of the heating system. The fuel is liquid petroleum gas (LPG) with a composition of 50% butane and 50% propane. The results show that the application stratified sheath on perforated burner at 0,0125 liter / sec has an average efficiency of 53,2% with the time required to boil 1,5 liters of water for 670 seconds, 36 seconds faster for the case perforated burner without stratified sheath and 80 seconds faster than conventional burner cases.

Optimasi Load Frequency Control (LFC) Pada Sistem Pembangkit Listrik Tenaga Mikro Hidro Berbasis PID-ANFIS Andrik, Mochamad; Farul, Mohamad; Cahyono, Iwan; Rukslin, Rukslin
Jurnal Rekayasa Mesin Vol 9, No 1 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Microhydro Power Plant is a small-scale power plant.Microhydro plants are built in areas where there is no power grid.In areas with sufficient water potential to generate electrical energy.The problem that often occurs in the micro-hydro generator system is the occurrence of non-constant generator.This is caused by changes in connected loads.Thus causing frequent fluctuations in the frequency of the system that can cause damage to electrical equipment.Therefore used Load Frequency Control (LFC) in order to control the frequency can be more stable.To get the optimal control parameter in micro hydro power plant system is used an Artificial Intelligence (AI) that is Adaptive Neuro Fuzzy Inference System (ANFIS) method. ANFIS data is taken from PID controller training data.By using PID-ANFIS control method, microhydro generating system can accelerate settling time and minimize overshoot.

Peningkatan Efisiensi Sistem Pemanasan dengan Penambahan Grid pada Perforated Burner Widodo, Agung Sugeng
Jurnal Rekayasa Mesin Vol 7, No 1 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Efficiency of a domestic gas stove depend on the kind of burner material and its configuration. In this study, a material in the form of a grid Â has been inserted into combustion chamberÂ to modify flame characteristics. Grids made from stainless steel with different thickness were inserted betweenÂ burner and loading. Ceramic stove cover was used to prevent heat release from flame. To develop the term of efficiency of the system, many parameters were measured as energy from fuel, cover temperature and water temperature.Â The results show that in certain fuel rate of 45 l/h, a heating system withÂ a grid of 5 mm has maximum efficiency of 58,8 % Â indicate a differentiation of 5 % higher compared to the heating system with no grid. Grid material absorbs energy from combustion process, keep the temperature inÂ the combustion chamber remain high also induce turbulence upstream the grid surface causing fuel-air mixing Â improved.

Pengaruh Prosentase Etanol terhadap Torsi dan Emisi Motor Indirect Injection dengan Memodifikasi Engine Control Module Rahmad, Hadi; Sasongko, Mega Nur; Wijayanti, Widya
Rekayasa Mesin Vol 7, No 2 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

This research present the torque and exhaust emission level from four stroke indirect injection fuel system engine. An engine fueled by ethanol gasoline blend. The original Engine Controle Module injected lean mixture into Combustion Chamber. Lean Mixture decreased Torque drastically. Therefore, the Engine Controle Module was modified to produce stoichiometric mixture. Injector was controlled by digital pulse of Fuel Controller. Ethanol was added into gasoline 0% - 100% at 1500 rpm-5000 rpm. The result demonstrate that increasing ethanol concentration into gasoline fuel system, decreasing Torque, and CO, HC, CO2 emission. By increasing ethanol concentration also increase CO2 emission to 34.6%.

Produksi Hidrogen dari Campuran Air dan Minyak Kelapa Murni (VCO) melalui Porous Media Tembaga menggunakan Prinsip Hydrogen Reformer Putra, Bernardus Crisanto; Wardana, I.N.G.; Siswanto, Eko
Rekayasa Mesin Vol 7, No 2 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Hydrogen reformer is a principle of hydrogen formation by using the reaction between reactants with a catalyst and a heating process in vapor form. Copper powder was used as the catalyst with a porosity of 28.245% and 31.736%, and a heat temperature of 310 oC. Variation of the ratio between water and virgin coconut oil (VCO) mixture of 1:1, 1:2, 1:3, 1:4 and 1:5 was developed to investigate the hydrogen generated productivity. The images of burning flame was taken at the outlet pipe of steam reaction to indicate the productivity of the hydrogen. The results shown that the productivity of the hydrogen was obtained by calculating the images of flame colors. The images indicate that the productivity of the hydrogen increase with adding virgin coconut oil (VCO) to water is greater. The average amount of energy and the power needed to react all variations on a comparison of hydrogen reformer tube 5 are 53.53885 kJ and 0.18666 kJ/sec, respectively.

Pengaruh Tekanan Vacuum terhadap Kekuatan Tarik dan Kekuatan Lentur pada Biokomposit Serat Purun Tikus (Eleocharis Dulcis) Fauzi, Yusuf Rizal; Sonief, Achmad Asâ€™ad; Suprapto, Wahyono
Jurnal Rekayasa Mesin Vol 7, No 3 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

In particular composite materials made from polymer biocomposite material which is now becoming an alternative to the metal and is very widely applied in the manufacturing industry because of its corrosion resistance and high strength ratio of specific gravity. Natural fiber began to be used for reinforcement in composites instead of synthetic fiber such as glass fiber because of its environmental friendly and widely available in nature. Meanwhile, the application of the natural fiber is still not optimized. The method to produced the composite is by isolate and vacuuming mold composite specimens (biocomposites) in a container (the media) to reduce the pressure around, so that the composite (biocomposite) is not in direct contact with the air, void in composite can decrease the strength of the composite. The matrix is 157 BTQN Polyester and the catalis is MEKPO with concentration of 1%. Specimens have been tested mechanically those are tensile testing and flexure testing and the specimen was evaluated using SEM and fracture was observe using macro photos. The results showed that there are significant effect of vacuum pressure level to the biocomposite tensile strength and flexural strength. Specimens with angular orientation 0/90/0/90 shows the tensile strength of 54.7 MPa and bending strength of 243 MPa.

Page 15 of 97 | Total Record : 965

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Redaksi Jurnal Rekayasa Mesin Jurusan Teknik Mesin Fakultas Teknik, Universitas Brawijaya Jl. MT. Haryono 167 Malang, Jawa Timur Indonesia 65145

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Kota malang,

Jawa timur

INDONESIA