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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
Rekayasa Mesin
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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ANALISIS PERUBAHAN BENTUK CHASIS TERHADAP BEBAN SEBAGAI DASAR PERANCANGAN MESIN BENDING HIDRAULIC Makinun, Makinun; Anggono, Agus Dwi; Riyadi, Tri Widodo Besar
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1841

Abstract

In the world of the automotive industry there are still several problems that must be resolved, such as what happened in one of the workshops, there was a shortage of tools to repair bent truck frames because of the accident. One of the tools needed to repair the frame is the bending tool, with this the planning process for making the tool has a problem with the ability of the hydraulic tool to be used to repair the frame of the Mitsubishi Center 125. With the simulation method using SolidWorks software, it can be seen that the force load on the frame of the Mitsubishi center 125 will then obtain data that can be analyzed using the finite element method. In the simulation, try to use a force load of 1 ton.f to 20 ton.f at two points, namely the center and side, then can be seen that the displacement of the object that occurs. The results of the simulation are increasing the force load, the degree of change in shape is increasing along with the damage to the object and the highest change of 500 mm so it requires the ability of hydraulic tools that have a compressive capacity of more than 20 tons.
STEAM TURBINE HEAT RATE ANALYSIS BY METHOD PERFORMANCE TESTS ON POWER PLANT IN PT. KSA PALM FACTORY Khusnaini, Alfan; Aspiansyah, Aspiansyah; Harianto, Agus; Adrianur, Halim
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1842

Abstract

This research analyzed the heat rate of a steam turbine in the palm factory of PT. KSA (PT. KSA) using performance testing methods. Steam turbine heat rate is a crucial parameter in power plant efficiency, and optimizing it can lead to significant cost savings. The research methodology conducted performance tests on the steam turbine at KSA's palm factory. The collected data was analyzed to determine the rate of improvement. The efficiency of a steam turbine can be seen from the heat energy input to produce 1 kWh of electricity and the turbine heat rate. Steam turbine efficiency was compared with the fuel energy required for every 1 kWh with the turbine heat rate. The turbine heat rate value was obtained based on the performance test, with the highest value being 51.516 (kJ/kWh) and the lowest being 40.514 (kJ/kWh). For steam turbine efficiency, the highest value was 8.89%, and the lowest value was 6.99%.
UNJUK KERJA MOTOR BAKAR PERTALITE DENGAN PENAMBAHAN BIOETHANOL DARI TETES TEBU Purnama, Ari; Romdloni , Macrus Afif
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1843

Abstract

The rapid increase in the number of motorized vehicles has resulted in the depletion of the availability of fossil-based fuel oil. Bioethanol from sugarcane molasses waste is an alternative that can be applied to vehicles with the condition that it has 99.95% ethanol fuel grade. The study used a bioethanol sample fuel blend BE10 (Bioethanol 10%+90% Pertalite), and then conducted property testing and Gas Chromatography Mass Spectrometry (GCMS) to observe the compound structure of the fuel. Modification of the ignition timing forward 2o (+2) was done by reprogramming the Engine Control Module (ECM). The addition of up to 20% bioethanol to pertalite increased the octane number from 90 to 93.1. However, the heating value decreased from 42.5 to 39.18 MJ/kg. In the GC-MS test, the number of compounds in the fuel increased to 52 and 51 compounds, respectively. The highest improvement in engine performance of all parameters using bioethanol and advance ignition was sample (BE10+2). The thermal efficiency was 6.16%. Thus, the use of bioethanol fuel blends and ignition timing modifications can be applied to vehicles to get good performance and be more environmentally friendly.
PENGARUH LOAD CAPACITY LISTRIK TERHADAP EFFISIENSI TURBIN UAP MODEL C6-R8-ER : STUDY KASUS PADA PT. SURYA BORNEO INDUSTRI Tratama, Teddy; Aspiyansyah, Aspiyansyah; Harianto, Agus; Rahmandika, Kukuh
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1844

Abstract

Steam turbines are widely used at many industrial. The purpose of this research was to study the effect of load capacity on steam flow mass rate.  Load Capacity is directly proportional to the steam flow mass rate to increase Steam turbine power. While the effect of load capacity on steam turbine efficiency, where it shows the actual performance of the steam turbine which is very important to minimize operating costs. The highest thermal efficiency of 21.49% and the lowest thermal efficiency of 20.17% in the load capacity variation showed that the steam turbine can still be categorized in good condition where the operating period has reached 5 years. It is necessary to carry out preventive maintenance on steam turbine components so that they remain reliable in supporting the company's operational and production activities.
ANALISIS BENTUK PENAMPANG BULAT, SEGI EMPAT DAN BULAT BERONGGA TERHADAP FATIGUE FAILURE DAN TEGANGAN PADA MATERIAL BAJA ST 60 Aspiyansyah, Aspiyansyah; Widayat, Adriant
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1845

Abstract

Metal fatigue is a problem in the use of metals in their applications, especially when they are exposed to cyclic or repetitive loads. This study analyzes the effect of round, rectangular and spherical cross-sections on fatigue failure of ST 60 steel. By providing a fatigue test load of 150 N and a rotating speed of 1500 rpm and a test specimen installation position with a distance of 70 cm, it was found that the round cross-section broke when experiencing 26,471 cycles, the rectangular cross-sectional shape broke when experiencing 115,515 cycles and the hollow round shape broke when experiencing 201,983 cycles. The largest shear stress is generated by a spherical cross-section with a value of 247.7 N/mm2 and the lowest is by a material with a hollow spherical cross-section with a value of 194.478 N/mm2. Normal stress and the highest shear stress are produced specimens with a spherical cross-sectional shape, this is because the spherical cross-section has a tendency to spread normal stress evenly over its surface.
PENINGKATAN KINERJA MESIN 2 SILINDER DENGAN PENAMBAHAN OCTANE BOOSTER PADA RON 90 Hariyadi, Muhammad Arif; Aspiyansyah, Aspiyansyah; Harianto, Agus; Riduan, Agus Adjie
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1846

Abstract

Octane number value in fuel plays an important role in the performance of a 2 cylinder gasoline motor. This study aims to increase the octane number value by using octane booster. The method used by mixing RON 90 with octane booster to get engine performance consisting of torque, power, specific fuel consumption and efficiency. The results show that the addition of 3 ml of octane booster to 1 liter of RON 90 will provide an optimum value on the performance of a 2-cylinder gasoline motorcycle engine.
ANALISIS EKSERGI KIMIA SISTEM KONVERSI LIMBAH PADAT CANGKANG SAWIT DENGAN TEKNIK PIROLISIS PLASMA Purawiardi , Ibrahim; Aribah, Putri; Aminuddin, Aminuddin; Dimyati , Arbi; Sari, Yessie Widya; Elbersen, Wolter; Maddu, Akhiruddin
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1847

Abstract

Chemical exergy analysis was commonly used to evaluate the effectiveness of some energy conversions derived from biomass. In this study, this analysis was conducted to evaluate oil palm kernel shell conversion via high-temperature plasma treatment. The plasma treatment was conducted with a DC power source with a voltage of 12 V and current variations of 40, 50, 60, 70, and 80 A. This chemical exergy efficiency was calculated based on gas chromatography (GC) analytical results. The calculated results showed that the chemical exergy efficiency increased exponentially as the current increased. Thus, based on this result, the arc plasma treatment is more recommended to be applied for the pyrolysis application of oil palm kernel shell than its gasification.
INVESTIGASI LAJU REGANGAN CREEP BAJA TAHAN KARAT FERRITIC PADA TEMPERATUR 570 °C Ekaputra, I Made Wicaksana
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1848

Abstract

The probabilistic assessment of failure due to the creep phenomenon must be determined with the minimum deviation. Since the creep failure took years before rupture, laboratory experiments were conducted to represent the failure time. However, the laboratory results are only an empirical approach; therefore, the probabilistic assessment can be deviated. A huge number of variables in creep experiments must be conducted to minimize the deviation. This study investigated the creep strain rate for the 9Cr-1Mo ferritic stainless steel. The lever-arm creep machine was used for the creep rupture test, and the test followed the standard of ASTM E139. The constant loads were applied in the range of 250 – 170 MPa with the homologous temperature of 570 °C. The curve of strain to time was recorded from each constant load condition. The creep strain rate was then calculated and presented in the curve of the creep strain rate to the applied load. The linear regression was drawn from the curve by applying Norton’s equation. By obtaining the creep strain hardening coefficient and exponent, an initial probabilistic assessment of creep failure at a temperature of 570 °C can be predicted.  
EXPERIMENTAL STUDY OF COOLING FLUID VARIATION ON THE THERMOELECTRIC HOT SIDE ON THERMOELECTRIC VACCINE COOLER BOX PERFORMANCE Pratama, Novreza; Rosyadi, Imron; Wahyudi, Hadi; Fasya, M. Haykal
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1850

Abstract

The advanced countries make health a high priority and collaborate to create a better quality of life. Vaccination is a critical component of global health. Vaccines must be stored at a constant temperature of 2-8℃, to maintain the viability of the vaccine cold chain. Thermoelectric cooling systems (TECs) are a solution that is simple, lightweight, low cost, and portable. Excessively high hot-side temperatures can be detrimental to operators and the environment during distribution processes. The application of fans and circulating fluid can reduce the TEC hot-side temperature. The lowest TEC temperature difference of 30.26℃ is achieved by using only a fan. The minimum hot side of 31.28℃ is achieved with the fan and circulating water model. The minimum cold side can be increased to 0.53℃ with the fan and circulating radiator coolant model. All tests were at vaccine-eligible temperatures. The best COP of 0.14 can be reached in this study.
USULAN KEBIJAKAN PEMERIKSAAN PADA GARDU TRAKSI LRT PALEMBANG BERDASARKAN ANALISIS NILAI KEANDALAN DAN KETERSEDIAAN Putra, Chandra Dwi; Virdyawan , Vani; Rachmilda , Tri Desmana; Suweca, I Wayan
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1853

Abstract

The Palembang LRT, the first light rail transportation system in Indonesia, operates at the traction substation. This research aims to propose an optimal inspection policy based on reliability and availability values. The study found that the reliability of the 750 V output DC cubicle sub-equipment is 84.01%, the feeder is 97.22%, the MV switchgear 20 kV AC is 98.60%, and the power supply controller (SCADA) is 94.04%. The availability value of the 750 V output DC cubicle sub-equipment is 99.99%, the feeder is 99.98%, the MV switchgear 20 kV AC is 99.99%, and the SCADA is 99.97%. The inspection time interval with a reliability target of 90% for the 750 V output DC cubicle sub-equipment is 181 hours, with the feeder sub-equipment having intervals of 1256 hours, MV switchgear 20 kV AC sub-equipment every 2513 hours, and the SCADA sub-equipment every 599 hours.

Page 92 of 97 | Total Record : 965

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