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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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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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THERMAL EFFICIENCY ANALYSIS OF COMBUSTION TURBINE GENERATOR (821-G-101) PT TRANS PACIFIC PETROCHEMICAL INDOTAMA AFTER MAJOR INSPECTION Arif Batutah, Moh; Kusnanto, Hadi; Kurniawati, Indah; Safi’i , Achmad
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.v15i3.1664

Abstract

The gas turbine is one of the most widely used equipment in oil and gas industries as an electric generator driving system. To maintain the reliability and performance of the gas turbine, a major inspection program is required. Thermal efficiency analysis is the parameters of success in major inspection activities. Thermal efficiency analysis is carried out by comparing data and operating parameters of gas turbine before and after the major inspection. The analysis aims to determine the actual efficiency of each component, and also the actual overall efficiency in the gas turbine. The study result is the actual thermal efficiency of a gas turbine after a major inspection has increased from 12.20% to 12.84% at a load of 6 MW, an increase from 15.76% to 16.77% at a load of 9 MW, and an increase of 18.59% to 20.16% at a load of 12 MW. Based on the actual performance comparison data with design data, it is known that the overall actual performance is still below the design performance, both heat efficiency, heat consumption and heat rate. This is caused by the operating lifetime
PENGARUH PARAFFIN WAX SEBAGAI LAPISAN TANKI PADA AIR CONDITIONER WATER HEATER (ACWH) Siregar, Chandra Amirsyah Putra; Siregar, A M; Lubis, R D W; Rudi, Arya; Rosyadi, Irham
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.v15i3.1677

Abstract

Currently air conditioner (AC) has been widely developed, one of which is the development of functions into two functions, namely air conditioning and providing hot water for bathing needs. The method is to utilize the high temperature and pressure of the front coming from the compressor, which is diverted into the water tank (air conditioner water heater (ACWH). So that when it passes through the water tank, heat transfer occurs into the water itself. The problem that arises is that when the AC is not operating, there is no heat source to maintain the water temperature in the tank. So an isolation method is really needed. This research will add phase change material such as paraffin wax as a tank lining. The aim is to lengthen the heat transfer process from inside the tank to the environment. Apart from that, this research also aims to analyze the effect of adding paraffin wax as a tank layer on AC performance. This research was carried out experimentally with a test duration of 7 hours, and cooling without time limit until the water temperature in the tank approached ambient temperature. As a result, it was found that adding a layer of paraffin wax as a tank layer was able to lengthen the heat transfer process from inside the tank to the environment. The time difference found was up to 15 hours. Meanwhile, AC performance decreased compared to tank without a paraffin wax coating.
TECHNO ECONOMIC ANALYSIS OF BIOMASS AS AN ALTERNATIVE ENERGY HOUSEHOLDS AND SMALL INDUSTRIES Dewi, Rany Puspita; Trisma Jaya Saputra; Mario Ammar Rasyid
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.v15i3.1692

Abstract

Briquetting technology became one appropriate method that can be used to convert biomass waste into a renewable energy source. Sources of biomass raw materials that have promising potential are pine sawdust and coconut shell waste. Sawdust has potential for about 0.78 million m3/year and coconut shell waste around 360 thousand tons/year. The research aim was to analyze the effect of the carbonization temperature to volatile matter and fixed carbon of briquette. The research was done by variating carbonization temperature at 400oC, 500oC, and 600oC. The result showed that at carbonization temperature of 400oC, the volatile matter and fixed carbon was 42.28% and 55.74%. The volatile matter and fixed carbon are 43.19% and 54.96%, found at carbonization temperature 500oC. The highest fixed carbon 55.98% and the lowest volatile matter 42.19% was found from carbonization temperature at 600oC. The carbonization temperature in briquetting process affect the volatile matter and fixed carbon of briquette
UJI KUALITAS BRIKET ARANG DARI SEKAM PADI DAN SERBUK KAYU SEBAGAI BAHAN BAKAR ALTERNATIF Urwatul Wusko, Ikna; Noraidi Maulana , Antan; Sabitah, A’yan; Misbachudin
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.v15i3.1694

Abstract

The availability of sawdust and rice husks is abundant, so the utilization of these wastes in the South Kalimantan region is very profitable. Apart from that, there are several references that mention rice husk waste and wood dust as prospective biomass sources. In this research, the process of testing the characteristics of composite briquettes made from rice husks and wood dust as an alternative energy source was carried out. This research aims to compare the results of briquette characteristic tests with the results of previous research. The ratio of rice husk-wood dust mixture is 100:0, 70:30, 30:70, and 0:100. For each type of sample, cassava flour with a composition of 10% was used as an adhesive. Of the five parameters; water content, ash content, volatile matter content, fixed carbon, and heating value. There are two parameters that do not meet SNI standards, namely the levels of volatile substances and fixed carbon. For volatile matter levels, the value is still high, namely 45.55%, which should be ≤ 15%, while the value for carbon remains low, namely 35.56%, which should be ≥77%.
PENGARUH MATERIAL TERHADAP DEFORMASI, STRAIN, DAN SAFETY FACTOR PADA BRACKET CALIPER MENGGUNAKAN METODE ELEMEN HINGGA Ghyferi, Andi Abdullah; Bahatmaka, Aldias; Wibowo, Muhammad Yusuf; Anwar, Ahmad; Ridananda, Ayyub; Vandika, Anggi
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.v15i3.1700

Abstract

The purpose of this study is to analyze the deformation, equivalent elastic strain, and safety factor of a bracket bracket made from two different materials by using the Finite Element Method, specifically aluminum alloy 6061 T6 and cast iron EN GJL 100. The result of this study is that the Aluminum Alloy 6061T6 material has a deformation of 3.57E-04 whereas the Cast iron EN GJL 100 material is 2.75E-04. In the elastic strain equivalent test, the Aluminium alloy 6061 T6 material is 3.00-E07 and in the Cast Iron EN G JL 100 materials is 2.32E-07. In the safety factor test, Cast Iron En G J L 100 material was better than 1.8617 compared to the Alumium Alloys 60 61 T6 materials are 1.5125. This shows that Cast Iron E GJ L 100 materials are better in deformations, eqeuivalent elastic stations, and safety factors in this case.
GAYA ANGKAT DAN GAYA HAMBAT SAYAP PUNA MODEL NACA 0015 MENGGUNAKAN SIMULASI ANSYS FLUENT Dzulfikar, Muhammad; Purwanto, Helmy; Abdul Wahid, Muhammad; Rahmatulloh, Salim
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.v15i3.1707

Abstract

The hi-speed computational using simulation software has emerged for the calculation of force dynamic. Albeit the significant progress in the computational method, the aerodynamic of flying wing are somewhat elusive. Herein, we performed a detailed computation of the lift and drag behaviors of NACA-0015 flying wing modelled through the surveillance speeds and difference angle of attack using Ansys. This study aims to determine and analyze the maximum angle of attack, lift force and drag force at speeds of 10 m/s, 30 m/s, and 50 m/s. The method used is analysis using CFD (Computational Fluid Dynamic) simulation software. The simulation uses Ansys Fluent to determine the aerodynamic characteristics, after varying the angle of attack at a predetermined speed on an airplane (unmanned aerial vehicle) wing with a NACA 0015 airfoil. The results of the research that has been carried out are the maximum angle of attack at a predetermined speed variation (Re = 0.2 x 105 to 1.0 x 105), namely 25° at each angle of attack, with details of a speed of 50 m/s getting the highest lifting force, around 38,72 N and drag force in the area 6,49 N.
DESIGN OF BAMBOO STICK POLISHING MACHINE WITH 12 TON/MONTH CAPACITY Kurniawan, Kurniawan; Setiawan, Heri; Sujana, Dede; Fauzan Hardiansyah , Ilham
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.v15i3.1714

Abstract

Local bamboo stick products are still unable to compete with imported bamboo stick on the market due to the high cost of production. The production of bamboo stick has several stages, including cutting bamboo blades, removing bamboo skin, forming square blades, forming circle profiles, cutting lengths, smoothing, sharpening, and drying. Currently, the refining process at the Booboo Walini Workshop has an uneven level of uniformity. In the design process of this polishing machine, the VDI 2222 design methodology is used. The way this machine works is that the bamboo stick will be inserted into a cylindrical finned reservoir and then rotated within + 1 hour. The skewers will contact each other and rub against each other which can smooth the surface of the bamboo stick from the fibers. In determining the optimal geometry and number of fins in the reservoir, simulations were carried out using Altair EDEM software with a Discrete Element Method (DEM) approach and considering the optimal number of contacts during the polishing process. This machine is driven by an electric motor with a power of 1.1 kW and an output rotation of 16 rpm. This polishing machine has a production capacity of 461.5 kg daily with a storage dimension of ∅597.3 × 680 mm.
STUDI EKSPERIMEN PENINGKATAN PERPINDAHAN KALOR FLUIDA NANO CuO /AIR PADA VERTICAL HELICAL MICROFIN TUBE Kristiawan, Budi; Khoirudin , Ilham; Wijayanta, Agung Tri; Hadi , Syamsul; Effendi, Hilbran Tama Dida
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.v15i3.1715

Abstract

The way to increase heat transfer is to use nanofluids and expand the heat transfer area. This research studied the thermal performance, convection heat change coefficient, and pressure drop in a double pipe heat exchanger experimentally in a vertically arranged helical microfin tube heat exchanger. Hot water flows on the side of the annulus. In contrast, nanofluid CuO/distilled water concentration of 0.05 vol% flows laminarly in the inner pipe of the microfin tube with cross-flow and parallel-flow arrangements. The result is convection heat transfer coefficient enhancement and thermal performance factor compared to the base fluid. Counter flow improves heat transfer better than parallel flow. This research contributes to the use of helical microfin and nanofluids to increase heat transfer in heat exchangers used in industrial processes.
ANALISIS KEKUATAN STRUKTUR SQUARE CHAMBER INJECTION MULTICASTING PYROGENIC IGNITER MENGGUNAKAN FINITE ELEMENT ANALYSIS (FEA) Prayoga, Rama Dwi; Prasetyo, Ichsan Dwi; Mahdiyyah, Maharani Inas
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.v15i3.1726

Abstract

It is necessary to analyze the structural strength of the square chamber component in the design of injection multicasting pyrogenic igniter to ensure that the structural components of the chamber are able to withstand loads from hydraulic piston pressure. Four square chamber configurations were analyzed using the Autodesk Inventor software FEA method. Load simulations are given at 10,000 N, 50,000 N, and 100,000 N. Von Mises stress, safety factor, and displacement are obtained for each design configuration. Where it is known that the structural design of the square chamber design configurations 1, 2, and 3 has optimal reliability at a load capacity of up to ± 10,000 N. As for the structural design of the square chamber design configuration 4, it is known to have optimal reliability at a load capacity of 50,000 N. However it is possible that it is reliable enough to withstand load capacities up to ± 100,000 N.
KINERJA PROTOTIPE RODA PENGGERAK BERSIRIP GANDA PADA LAHAN SAWAH GAMBUT Susanto, Herdi; Darsan, Herri; Jayadi, Farid; Masykur, Masykur; Husin, Zakir; Ali , Syurkarni
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.v15i3.1733

Abstract

Agricultural technology to support the agricultural sector, especially peaty paddy fields, should be developed, because peat land with a thickness of less than one meter has been recommended for rice crops. supported by a potential peatland area of ​​up to 21 million Ha or 10.8% of Indonesia's land area. Currently, peatland farming communities use sickles to harvest rice and hoes to cultivate the land. So far, hand tractor finned wheel drive technology has been widely used for cultivating wet paddy fields, whereas in conditions of peaty paddy fields it has not been able to be used because of the high level of sinkage and wheel slip, for this reason a new model of wheel is needed that is capable of working in peaty paddy fields. The aim of the research is firstly to find the right model of driving wheel for use in peaty paddy fields, secondly a prototype driving wheel for peaty paddy fields, and thirdly to experimentally test the driving wheel. Research results (1) prototype with a driving wheel diameter of 35 cm and the number of fins is 8 for the standard fin type and for the double fin type the driving wheel diameter is 40 cm with 4 vertical arc fins, which are placed on the surface of the driving wheel. (2) Comparison with the same type of loading shows that the double fin type drive wheel has a relatively smaller level of wheel loading (around 20%) when compared to the standard type drive wheel. (3) The sinkage level of the standard type drive wheel has a smaller sinkage (around 10%) compared to the double finned wheel type, in tests with the same type of loading. test loads for wheels are 20 kg, 40 kg and 60 kg. The double fin type drive wheel is good for use in peaty paddy fields.

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