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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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PENGARUH KOMPOSISI LAPISAN NI-CR PADA BAJA ASME SA 210 C TERHADAP LAJU EROSI SUHU TINGGI Utomo, Slamet Prasetyo; Darmadi, Djarot B.; Widodo, Teguh Dwi
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.v15i1.1501

Abstract

The purpose of this study was to determine the high temperature erosion rate of the NiCr coating on ASME SA 210 C steel using the combustion oxy fuel thermal spray method. In Circulating Fluidized Bed (CFB) boiler, there is circulation of fly ash, silica sand and air in a high temperature environment which causes erosion. High temperature erosion can be minimized by using Ni-Cr alloy coating sing the combustion oxy fuel thermal spray method. NiCr alloy is proved a able to provider a metal alloy layer composition that can withstand temperatures of 600°C with a fly ash impact speed of 200m/s. The metal alloy compositions that have been studied are NiCr, NiCrCo, NiCrWc, NiCrWcCo, and NiCrCoMo. The results of this study indicates that metal alloys are generally atteche to the substrate and withstand at a high temperatures (600°C). The highest hardness provide by NiCrWcCo alloy which is 177.46 HV. The lowest hardness is found in the composition of the NiCrCo alloy (161.71 HV). The lowest high temperature erosion rate was found in the NiCrWcCo alloy, which was -0.00481 gram/minute. This low erosion rate because the NiCrWcCo alloy produces a good weeting effect for metal alloys and has a high hardness value.
EVALUASI KINERJA DIRECT EXPANSION SOLAR-ASSISTED HEAT PUMP WATER HEATER KAPASITAS 30 LITER DENGAN MENGGUNAKAN REFRIGERAN R134A Irawan, Teguh; Mainil, Rahmat Iman; Aziz, Azridjal
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.v15i1.1502

Abstract

Experiments were carried out to determine the performance of a direct expansion solar assisted heat pump water heater (DX-SAHPWH) which mainly consists of an evaporator panel with a surface area of ​​0.23 m2, a rotary compressor with an input power of 122.5 W, an insulated water tank that has been wrapped around a condenser with a diameter of 0.024 m and a length of 15 m and a capillary tube with a diameter of 0.001 m and a length of 1.61 m. Tests were carried out in open spaces, enclosed spaces and air-conditioned rooms exposed to direct sunlight. The results of this test are that the highest coefficient of performance (COP) on the DX-SAHPWH system is obtained at 1,25 and the smallest COP is obtained at 0.60. The higher intensity of solar radiation has a positive effect on the performance of the DX-SAHPWH system, which results in the heat transfer rate at water (Q wm) increases, the time required for heating is faster, and the COP of the DX-SAHPWH system increases.
UJI EFISIENSI ANODA KORBAN PADUAN ALUMINIUM DAN ZINC MENGGUNAKAN STANDAR UJI DNV RP-B401 TERHADAP VARIASI TEMPERATUR ELEKTROLIT Rohmannudin, Tubagus Noor; Sulistijono , Sulistijono; Kusuma, Willy Deviet; Sitorus , Grace Aghata
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1503

Abstract

Corrosion is a decrease in metal quality caused by electrochemical reactions with the surrounding environment. Corrosion is destructive, dangerous, and can cause great losses. Corrosion cannot be stopped but its rate can be controlled. There are many methods that can be used to control the rate of corrosion, one of them is the sacrificial anode cathodic protection. Protection of anode cathodic sacrificial utilizes the principle of a galvanic cell where the metal will be protected or the cathode has a higher potential otherwise the metal will be sacrificed or the anode has a lower potential value. One of the standard practices used to design cathodic protection is DNV RP-B401. By carrying out tests according to the DNV RP-B401 standard, then it can be seen the value of the efficiency of the sacrificial anode working on cathode protection. The efficiency of the sacrificial anode needed to be known to measure the performance of the sacrificial anode in providing protection to the metal to be protected. This research was conducted to determine the effect of differences in electrolyte temperature on the efficiency values of aluminum alloy and Zinc alloy sacrificial anodes. In this study the feasibility test was carried out using electrolyte temperature variations, namely at temperatures of 20°C, 25°C, 30°C, and 35°C. the efficiency results obtained in aluminum alloys for temperatures of 20°C, 25°C, 30°C and 35°C were 88.6%, 80.66%, 76.55% and 63.23%. Then for the Zinc alloys with the same temperature variations were 92.95%, 90.39%, 88.15%, and 77.24%.
EFFECT OF COMPRESSOR INLET TEMPERATURE ON THERMAL EFFICIENCY ROLLS ROYCE RB211 GAS GENERATOR IN COMBINED CYCLE POWER PLANT Yulistio, Nanang; Wahyudi, Muhammad Prihadi Eko; Fitriyah, Qoriatul
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.v15i1.1505

Abstract

The combined cycle power plant must operate 24 hours without stopping so that in operation at any time an increase in the temperature of the gas generator RB211 can occur. The RB211 gas generator works well when the ambient temperature is low. The X combine cycle power plant uses a chiller to lower the inlet air temperature so that the air entering the compressor will be lower. The purpose of this study was to analyze and conclude the effect of the compressor inlet temperature on the thermal efficiency of the Rolls Royce RB211 gas generator in the combined cycle power plant. Data was collected by requesting historical data on September 5-11, 2022 in the central control room. The method used in this study is simple linear regression analysis because it only involves two variables. The independent variable is the inlet temperature of the compressor and the dependent variable is the thermal efficiency of the gas generator. It is known that the highest efficiency is at a temperature of 292,94 kelvin with a thermal efficiency value of 36,87% while the lowest efficiency is at a temperature of 301,89 kelvin with a thermal efficiency value of 35,61%. The regression analysis equation is Ŷ = 0,60665231-0,00082223X so the hypothesis results obtained through the significant F test with F table is that there is a significant effect between the compressor inlet temperature on the thermal efficiency of the gas generator.
RANCANG BANGUN ALAT UJI UNJUK KERJA TURBIN ULIR DENGAN SISTEM AKUISISI DATA UNTUK MEDIA PEMBELAJARAN PRAKTIKUM TURBIN AIR Iswanda, Dovian; Suharto, Widodo Putra; Naufal, Alban; Andriani, Devi; Supandi, Supandi; Nurhaidah, Nurhaidah; Faino, Faino
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.v16i1.1506

Abstract

To facilitate students' understanding of the types of water turbines, how they work, and the parameters that affect the performance of water turbines, it will be easier if the water turbine is made on a laboratory scale so that students can observe directly and students can change some parameters directly so that students understand the parameters that affect the performance of water turbines. In this research, a laboratory-scale screw turbine type water turbine will be made equipped with a data acquisition system where several sensors will be installed to read the parameters when the turbine is operating which then all parameters will be displayed on the LCD and recorded into memory automatically. This research was conducted using experimental methods by designing and manufacturing screw turbines using 3D Printing using digital prototyping techniques and designing a data acquisition system to facilitate parameter measurement. The results of the study obtained a screw turbine model with an outer diameter (Ro) of 0.07 m, an inner diameter (Ri) of 0.03 m, a pitch distance of 0.05 m, a thread length of 0.6 m, a maximum output power of 3.5 W at a discharge of 0.07 m3/s, maximum efficiency of 6 % at a discharge of 0.07 m3/s.
ANALISIS PENGARUH VARIASI ARAH PENGELASAN HARDFACING TERHADAP KEKUATAN TARIK DAN STRUKTUR MIKRO PADA BAJA ASTM A36 Awali, Jatmoko; Maulana, M. Arzil; Rohimsyah, Fikan Mubarok; Triana, Yunita
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.v15i1.1507

Abstract

Welding is a metal joining process with filler or without filler. The welding method is also used to thicken the surface of the material or hardfacing. Hardfacing is a welding process with the aim of improving mechanical properties and is used on worn components by using SMAW welding, SMAW welding is used because it is relatively inexpensive and flexible. The purpose of this study was to determine the effect of hardfacing with SMAW welding direction variations on the tensile strength and microstructure of ASTM A36 steel material. The welding directions are horizontal, vertical and diagonal. This study used ASTM A 36 steel with a thickness of 5 mm. The welding electrode was E7018 with a diameter of 3.2 mm and a current of 130 A. After conducting this research, the highest average tensile strength value was found in the vertical direction, which was 474.74 N/mm2. The average value of the tensile strength in the diagonal direction is 446.715 N/mm2. The average horizontal tensile strength value is 420.785 N/mm2.
ANALISIS KINERJA MESIN PEMARUT SAGU Parenden, Daniel; Suwarjono, Suwarjono; Cipto, Cipto
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.v15i1.1508

Abstract

Sago plantations are spread in almost all regions in Indonesia, such as Sulawesi, Kalimantan, Sumatra, Papua and Maluku with a land area of approximately 1,128 million Ha, which means that 51.3% of the world's sago is in Indonesia. Papua, including Merauke, is a district at the eastern tip of Indonesia that has the greatest potential for sago plantations in the world, reaching 5.5 million hectares. One of the villages in Merauke that has lots of sago plants is Kampung Kweel, which is located at the head of the Maro River. The Sago Farming Community in Kweel Village, performs sago processing, without using machines, so the results obtained are not optimal. The use of sago processing machines can streamline the sago production process. Processing sago with the application of sago grater machine technology is capable of producing grated sago pith from 279 kg/hour to 610.8 kg/hour, with a starch yield percentage of 37.91%.
STRENGTH CONSIDERATION ON CAR BODY MODIFICATION FOR PANORAMIC TRAIN Harnany, Dinny; Adista, Reyhan K. A.; Syaifudin, Achmad; Putra, Ary Bachtiar Krishna; Priyambodo, Singgih
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.v15i1.1510

Abstract

Modifying the car body structure from the existing train to another car body type requires an analysis of several factors. The strength of the design due to overload and the durability of the structures due to operational loads need to be re-evaluated. Furthermore, stiffness analysis also needs to determine the characteristics of the structure when it is not loaded. This study numerically analyzed the considerations in selecting the structural steel profile for modification of the existing car body into a panoramic type using the ANSYS Workbench R19. The underframe structure can still be used, and other structures are modified with the UNP profile. The side wall, and roof are changed in shape and size following the glass design of the panoramic train. The solid 3D model is rebuilt into a surface model to simplify the analysis. Static structural analysis is used to clarify the strength of the design under overload, a combination of static and transient structural analysis is applied to calculate the operating life, and modal analysis is chosen to figure out the stiffness. The simulation results showed that the modified design had met the needs and requirements based on the PM 175 standard of 2015 by the Indonesian Ministry of Transportation and the international standard EN-12663.
PENGARUH CO-FIRING SERBUK KAYU KEDONDONG TERHADAP PERFORMA DAN EMISI GAS BUANG BRIKET BATU BARA Nuryanto, Edi; Sudarno, Sudarno; Winardi, Yoyok
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.v15i1.1511

Abstract

Coal is the main fuel in steam power plants (PLTU) whose availability is dwindling. Realizing this, one of the efforts made is to mix coal with other fuels, known as Co-Firing. This is done as an effort to substitute new and renewable energy and is friendly to the environment. The purpose of this study was to find out the effect of a mixture of kedondong sawdust in coal on performance and exhaust emissions at PLTU. This research was conducted using quantitative methods based on experimental data. Kedondong wood powder as co-firing is varied, namely 5%, 10%, 15%, 20% and compared to 100% coal. The combustion process is carried out in the boiler and the data obtained is in the form of operating parameters and exhaust emissions. Based on this research, it was found that all operational parameter data were normal and were within the allowable standard limits. Likewise, exhaust emissions produced by both NOx and SO2 show better results than the use of 100% coal.
PENGARUH OUTSERT TERHADAP ALIRAN DAN PERPINDAHAN KALOR PADA ANNULAR HEAT EXCHANGER TIPE HORIZONTAL Ma'a, Mustaza; Kamal, Samsul; Pranoto, Indro
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.v15i1.1512

Abstract

In the industrial environment, there is a need to boost heat transfer. The flow manipulation method was selected because it is less expensive, simpler to use, and more accessible. It is wise to utilize a horizontal type annular heat exchanger because it is simple and easy to manufacture. Cold fluid from the reservoir tank is pumped through the annulus in a closed system. Cold fluid passes through the Omega rotameter before it enters the experiment apparatus. The cooling system allows cold fluid to leave through the outlet and return to the reservoir tank. There are five different cold fluid flow rates, ranging from 2.5 GPM to 5 GPM. A tubular heater with a 500 W heat rate is inserted in the annular heat exchanger's midsection. The flow inside the annulus is heated by this heater. According to the results of the experiments, utilizing outsert has the potential to increase the heat transfer coefficient (h) average 89,84%, Nusselt number (Nu) average 76,76%, and friction factor (f) average 55,48%. The flow regime, which starts out in laminar circumstances and transition to quasi-turbulent and turbulent conditions at Re = 8000, is also impacted by the presence of an outsert. The thermal performance factor (η) average 1,54, which demonstrates an increase in heat transfer.

Page 80 of 97 | Total Record : 965

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