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Redaksi Jurnal Rekayasa Mesin Jurusan Teknik Mesin Fakultas Teknik, Universitas Brawijaya Jl. MT. Haryono 167 Malang, Jawa Timur Indonesia 65145
Location
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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Pengaruh Penggunaan Fan dan Debit Fluida terhadap Efisiensi Kerja Atmospheric Water Generator Vidiyanto, Bagus Prabowo; Aryadi, Widya; Khoiron, Ahmad Mustamil; Anis, Samsudin
Rekayasa Mesin Vol 10, No 2 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.02.1

Abstract

The purposes of this study are to investigate the effect of condenser cooling fan addition and airflow rate on the performance of Atmospheric Water Generator (AWG). In this work, humid air from the environment was supplied into AWG at 15 lpm. Then, it was condensed in the system with and without using a condenser cooling fan. The fan airflow rate also varied from 0.09 m3/s to 0.16 m3/s in order to better assess AWG performance. The results showed that the use of a condenser cooling fan can improve the Coefficient of Performance (COP) and the efficiency of the Atmospheric Water Generator. The average value of COPactual of 2.499 and the highest efficiency of 79.07% was achieved by an Atmosphere Water Generator equipped with a condenser cooling fan at an airflow rate of 0.16 m3/s.
Performansi Alat Penukar Kalor Udara-Tanah (Earth-Air Heat Exchanger) dengan Siklus Terbuka di Kota Medan Manik, Terang U.H.S. Ginting; Sitorus, Tulus Burhanuddin
Rekayasa Mesin Vol 10, No 2 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.02.6

Abstract

The purpose of this study was to obtain the performance of an EAHE (earth air heat exchanger) with weather conditions in the Medan city. The research method carried out was experimental in the field for several days with varying weather conditions. The air conditioning system using an Air-Earth Heat exchanger has tested its performance by comparing the experimental results with the model of equations that have been developed by the previous researchers. The incoming air velocity 2 m/s is obtained by the output temperature on average for the results experiment with 27.1oC and for theoretical results of 26.5oC with an average air temperature of 32.1oC. As for the incoming air velocity 3 m/s, the resulting output temperature averages for the experimental results of 27.3oC and for theoretical results of 26.9 oC with an average air temperature that is 33.8oC. The higher the air intake velocity, the higher the output temperature in the Air-Earth heat exchanger. At 2 m/s air velocity, the output temperature is 27.1oC and then rises to 27.3oC at air velocity enter 3 m/s. The effectiveness of the earth heat exchanger at the incoming air velocity 2 m/s for the experimental results was 0.84 while the theoretical calculation was 0.97. From the results of multiple regression analysis, it is found that the NTU and inlet air temperature values have a very strong relationship to the COP value. The correlation coefficient is 0.916 at a speed of 2 m/s and 0.959 at a speed of 3 m/s. The results show great potential for the development of ground-air heat exchangers as a passive cooling system building solution.
Pengaruh Diameter dan Kecepatan Kipas Kondensor terhadap Suhu AC Mobil Pribadi, Muh. Agung; Maydiant, Endry; Sukardi, Sukardi
Rekayasa Mesin Vol 10, No 2 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.02.11

Abstract

The efficiency of the Air Conditioning (AC) system in a car depends on the process of compression, condensation, and evaporation. The new thought that arises is what if the diameter of the condenser fan blade is varied? The objectives of this study are: (1) to test the effect of the diameter of the condenser fan blade on AC temperature, and (2) to test the effect of condenser fan rotation speed on AC temperature. This research is using an experimental method. The results showed: 1) there was an effect of the diameter of the condenser fan on AC temperature, which was 16.7%; and 2) there is an influence of condenser fan rotation speed on AC temperature that is equal to 20.5%. These findings become a reference that to improve the performance of the AC, it can be done by increasing the heat transfer process in the condenser.
Analisis Penyerapan Energi Kinetik pada Berbagai Variasi Kecepatan dan Inersia Flywheel Faizun, Muhammad Muhtada; Basuki, Hari Arbiantara; Mulyadi, Santoso
Jurnal Rekayasa Mesin Vol 5, No 3 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kinetyc Energy Recovery system (KERS) is a mechanism of non convensional breaking system to absorb and recovery kynetic energy from breaking desseleration by the vehycle asstep of increasing vehichleeficiency. At this moment Kinetyc Energy Recovery system (KERS) are applycated on high speed vehicle, hybrid vehicle, and heavy duty vehicle, usually F1 race car, FerraryEnzo sport car, Flybus and modern truck. The absorbtion of kynetic energy use flywheel. Kynetic energy is effected by flywheel inertia and duration. The purpose of this research is to know absorbtion of kynetic energy from flywheel with 2 various of inertia from KERS type mechanism and wheel velocity various between 800rpm until 1800rpm. This research was done at Design Laboratory of Mechanical Direction Engineering Faculty of Jember University. Conclusion from the research is the biggest absorbtion energy in flywheel from various inertia 0,0317kg.m 2 at 1800rpm are 23.210,72 Joule.Keywords: Kinetyc Energy Recovery system (KERS), flywheel, Inersia, kynetic energy, absorbed energy
Analisis Thermal Nilai Kalor Briket Ampas Batang Tebu dan Serbuk Gergaji Wibowo, Rianto
Jurnal Rekayasa Mesin Vol 10, No 1 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.01.2

Abstract

Availability of fossil fuels are increasingly rare, result in rising fuel prices. Hence, alternative fuel needs to be examined. In this study a mixed composition of bagasse charcoal and sawdust used. The two material then mixed with starch adhesives to produce briquettes with different compositions. This study aims to determine the thermal characteristics of briquettes with a variety of different compositions. This study uses a briquette composition variations sugarcane bagasse and sawdust 100%: 0%, 75%, 25%, 50%: 50%, 25%: 75%, and 0%: 100%. This type of research is the experimental method. Testing the thermal characteristics of charcoal briquettes bagasse and sawdust using a bomb calorimeter and boil a liter of water to determine the calorific value and the rate of combustion. The results showed that the briquettes with a variation of 100% : 0% has the highest calorific value of 4117 cal/gr and the lowest firing rate of 0,155 gr/min. Sawdust briquettes 100% has the lowest calorific value of 3657 cal/gr and the highest firing rate of 0,268 cal/g. There are differences in calorific value and the rate of combustion of charcoal briquettes bagasse and sawdust with a variety of different compositions. So it can be said that the longer the briquettes burning speed, the higher the value calorific
Kajian Eksperimental Mesin Pendingin Adsorpsi Tenaga Surya dengan Menggunakan Adsorben Campuran Sitorus, Tulus Burhanuddin
Jurnal Rekayasa Mesin Vol 10, No 1 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.01.7

Abstract

The purpose of this study was to obtain the performance of the adsorption refrigerator driven by solar energy using mixed adsorbents. The refrigerant used is methanol with 99% purity. The adsorbent used is a mixture of active carbon-active alumina with mass of 7 kg. The type of active alumina used is molecular sieve 13X and the activated carbon used is the ordinary type of coconut shell with 1-3 mm grain size and is produced in the province of North Sumatra. Note that active alumina and activated carbon tested can absorb methanol in the range of 350 ml/kg and 300 ml/kg with a heat source of about 120oC. The test was carried out in the open field exposed to solar radiation from 08.00 WIB until 08.00 WIB the next day for seven cycles. The average of solar radiation ranges from 107.036-214.44 W/m2, and the duration of radiation varies from 12.03 to 12.28 hours/day during experiments. The test results also show that the use of mixed adsorbents with methanol adsorbate can produce evaporation temperatures up to about 4,16-13,90°C with a heat source from a temperature of 91.32-97.35°C. The efficiency of collector obtained during testing ranges from 60.09 to 62.26% with maximum solar radiation conditions ranging from 799.40 to 882.76 W/m2. The COP value obtained in the range 0.0770-0.1003 with the total daily radiation between 11.245-17.156 MJ/m2.
Analisis Keandalan Mesin Produksi Tissue Basah Sulistyarini, Dwi Hadi; Setyarini, Putu Hadi; Cahyawati, Amanda Nur
Jurnal Rekayasa Mesin Vol 10, No 1 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.01.12

Abstract

The wet tissue company in this research has 46 volpack machines, 44 are used to produce wet sanitizer tissue and 2 other machines are used to produce wet cologne tissue. During this time, the company produces cologne type wet tissue where its production does not reach the production target. One of the causes of this problem was the high downtime influenced by the reliability of these components and machine; so causing the production capacity of wet cologne tissue to be reduced and company's production targets not achieved. Therefore, in order to achieve the company's production targets and to make the production process more efficient and effective, it is necessary good maintenance actions that pay attention to the reliability value of each critical component. This study analyzes the reliability of critical components so that companies can take action to increase their machine reliability.
Pengaruh Penggunaan Katalis Kalium Hidroksida pada Campuran Minyak Nabati dan Air terhadap Produksi Hidrogen dengan Menggunakan Metode Steam Reforming Mukhtar, Anas; Wardana, I Nyoman Gede; Widodo, Agung Sugeng
Jurnal Rekayasa Mesin Vol 10, No 2 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.02.5

Abstract

Steam reforming is a process of hydrogen formation through the process of vaporization of vegetable oil and water at a certain heating temperature using a catalyst, so the chemical reaction is occurred and produced hydrogen gas. The catalysts used is potassium hydroxide (KOH) in the amount of 1 gram, 2 grams, and 3 grams, which are heated at 350oC. To investigate the effectiveness of hydrogen production, the vegetable oil and water mixture is varied of 1:1, 1:2, 1:3. The steam coming out from the pipe is burned to get the color of the flame. The area of flame color is calculated using AutoCAD software, which is the color are a blue flame, yellow flame, and the color of red flame. The calculation results area of the flame colors showed that the greater addition of vegetable oil to water and the greater addition of the potassium hydroxide catalyst is increased hydrogen production.
Prediksi Laju Perambatan Retak Melar pada Baja Austenitik 316L Menggunakan Data Uji Melar dan Metode NSW Ekaputra, I Made Wicaksana
Jurnal Rekayasa Mesin Vol 10, No 2 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.02.10

Abstract

In this study, an experimental creep crack growth rate (CCGR) of austenitic steel AISI 316L was predicted from the creep constant values and Nibkin Smith Webster (NSW) method. The experimental CCGR data were obtained from the CCG test under four different load conditions ranging from 6000 to 7000 N at 525 oC. The creep constants, A and n were obtained from the uniaxial creep rupture test under various load conditions, ranging from 180 to 225 Mpa at 525 oC. The creep constants were determined both from the minimum and average creep strain rate data. By applying the creep constants and NSW method, the predicted CCGR curve was generated and compared with the experimental CCGR curve. The result showed that the predicted CCGR curve based on the minimum creep strain rate data was found to be close to the experimental CCGR curve. The significant portion of creep crack growth’s lifetime of austenitic steel AISI 316L was occupied by the crack propagation (steady stage) period rather than crack initiation and/or fracture periods. In addition, plane stress and strain conditions could also be determined from the predicted CCGR curve. It was observed that the experimental CCGR curve was located near the plane strain condition where no deformation occurred in the lateral direction.
Analisa Perkembangan Struktur Aluminum (AC2B) dengan Pengaruh Penambahan Stronsium pada Part Transmisi Sub Assy Menggunakan Metode Pengecoran Gravity Dies Casting Antonius, Dikky; Budiarto, Budiarto; Atmadi, Priyono; Pratama, Rakha Anugrah
Rekayasa Mesin Vol 10, No 3 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.03.4

Abstract

Recently, one of the problems faced by the automotive industry is the frequent failure parts produced by casting processes such as uncomplete filling, low mechanical properties, shrinkage (non-uniform shrinkage), and porosity. In this research, the modification method with the addition of strontium while aluminum being melted is held. This experiment was made to solve either the shrinkage problem or porosity. The improvement of the mechanical properties of aluminum also become one of the purposes of the experiment. The concentration of strontium added was 0 wt.% Sr, 0.005wt.% Sr, 0.0075wt.% Sr, and 0.01 wt.%. The results show that the increased Sr content on AC2B will increase the mechanical properties, while the optimum value occurred by addition value 0.01wt. % Sr. However the results also show that the concentration of strontium has no effect on reducing shrinkage porosity, and can reduce the size of aluminum dendrites.

Page 28 of 97 | Total Record : 965

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