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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 6 Documents
 1 
Search results for , issue "Vol 1, No 2 (2010)" : 6 Documents clear
Ampas Penyulingan Nilam Sebagai Bahan Bakar Alternatif Pada Proses Produksi Minyak Nilam Sugiarto, Sugiarto; Sulistyo, Erwin
Jurnal Rekayasa Mesin Vol 1, No 2 (2010)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Remaining organic waste product of nilam oil distillation is a potential biomass as a fuel substitute for firewood. Utilization of waste distillation during refining is considered not yet optimal. Whereas by utilizing distillation waste will be obtained by the double advantage is decreasing the cost of production like reduction of the cost of purchasing firewood, waking environment from illegal logging and encroachment uncontrolled firewood and maintaining forest conservation. This research was conducted by varying waste of nilam distillation mixed fuel with firewood with a variation of 0%, 25%, 50%, 75% and 100% waste compared to firewood. Distillation capacity of each process is 60 kg of raw materials that have been chopped dried nilam. Dependent variables are sought in the form of heating value, temperature data in space heating, steam temperature and volume of nilam oil is produced for each variation of fuel weight fraction of waste nilam. The result is a solid fuel heating value increases with increasing weight fraction of waste nilam compared to the firewood. Zones heating temperatures and steam temperature fluctuated or not stable for all variations of fuel weight fraction of waste nilam. Steam temperature below 100 ° C which indicates the water content in the steam is still high. Time required for each distillation process with a capacity of 60 kg is still relatively long time is 5 to 6 hours. Volume nilam oil products tend to increase with increasing weight fraction of fuel from the dregs of nilam. Keywords : Waste distillation of nilam, alternative fuel, nilam oil
Pengaruh Variasi Jarak Alur Setengah Lingkaran Terhadap Penguatan Vorteng dan Penurunan Tekanan Pada Saluran Berpenampang Segi Empat Purnami, Purnami
Rekayasa Mesin Vol 1, No 2 (2010)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

This research was done by implementing a closed square cross section channel, where the bottom surface of the channel was semicircle transverse grooved. The frequency of flow oscillation measurement was done by setting up a resistance sensor that is Wheatstone bridge. A resistor of the Wheatstone bridge is place in to a manometer which was filled by water. The manometer is connected to the channel while the sensor is connected to ADC. A U manometer was used to measure the static pressure. Both measurements were done together at severals Reynold number. Based on the result it is seen that the maximum Strouhal number at Reynold number of 950. Vortex strength increases when Strouhal number increase where the largest vortex strength occurs at the smallest grooved distance with the increase of pressure drop. Oscillating shear stress increase with the increase of Reynold number. This phenomena indicated that highly transport momentum occurs as the Reynold number increase which it is contributed to the vortex strength and fluid exchange. Keywords : vortex, Reynold
Rancang Bangun Perajang Ubi Kayu Pisau Horizontal Lutfi, Musthofa; Setiawan, Sigit; Nugroho, Wahyunanto A.
Jurnal Rekayasa Mesin Vol 1, No 2 (2010)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Cassava is an important source of food calories as well as source of other products in Indonesia. Utilization and processing potential of cassava are widely diverse. One of processed commodity of cassava is crispy chips. In crispy chips production, there need an efficiently and a good copper. The aim of this research is to design a cassava chopper powered by electrical motor and equipped with horizontal blade. Furthermore, this study aimed to identify the performance of designed chopper. The result of the design step is a chopper that has well functionally. The designed chopper has four parts; frame, transmission, hopper and cutter blade. It is powered by 0,25 kW electric motor and equipped with rotation speed control. In the design of the chopper with a horizontal blade, the cutting blades are not spinning stationary but changed into backward and forward movement. The highest specific energy as a result of performance identification is 42.50 Joules / kg. The highest working capacity is 62.550 kg / h occurs in motor rotation of 170 rpm. Keywords : Design, Chopper, horizontal blade, cassava, crispy chips.
Corporate Performance Measurement Balanced Scorecard Through Approximation Sustainability at Pabrik Gula Krebet Baru Malang Utoyo, Utoyo; Soeparman, Sudjito; Astuti, Murti
Rekayasa Mesin Vol 1, No 2 (2010)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

PG. Krebet Baru consists unit I/II be sugar industrial company with capacity 11.500 tcd, in this time PG.Krebet Baru cope to fulfil national sugar need only seen from ability reachess profit and tall sale level for that companies to want watchfulness aim correct performance measurement system to analyze performance with concept sustainability balanced scorecard that be method development balanced scorecard with add social environment aspect, because this aspect is very krusial to PG. Krebet Baru that presents citizen solid intermediate and, to achieve aim, used several methods AHP and OMAX also detect point of view, mission, target stipulating with performance measurement from each perspective. for researcher activity support submits kuisioner to customer 25 respondents, employee 25 respondents and 2 leadership respondents PG. Krebet Baru and PG.Candi Baru Sidoarjo. kuisioner used to measures /employee customer satisfaction with stipulating KPI complete the heavy, result kuisioner at validity test and realiabilitas. from measurement analysis result is got 30 kpi and 30 sub kpi's as a whole period performance achievement index 2009 performance scores: 7,37 (yellow) mean the performance not yet achieve target, furthermore kpi score 0 until 7 (red/yellow) as much as 27 kpi/sub kpi need repair subsidizes performance as a whole. Keywords : AHP, performance, KPI, OMAX, Sustainability
Pengaruh Fraksi Volume Terhadap Kekuatan Tarik dan Lentur Komposit Resin Berpenguat Serbuk Kayu Gapsari, Femiana; Setyarini, Putu Hadi
Jurnal Rekayasa Mesin Vol 1, No 2 (2010)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

On the research, composite was made from polyester with volume of filler fraction variable of 15%, 30%, 45% and the type of filler was Mahogany (Swietania mahogani). The filler measurement used was 50 mesh. Polymer matrix used was BQTN 157 unsaturated resin polyester. The tensile test of experiment specimen was based on ASTM D638 M-93. and the bending specimen was based on D790-92 Standard. The higest of tensile strength on the volume fraction of 30% that is of 2.081916 kg/mm2 . For the composite material with particle of composite material mahogany with filler volume fraction of 15% had the average flexural strength of 34.98 N/mm². On the particle with volume fraction of 30% had the highest average flexural strength of 45.6780 N/mm². The higest Modulus of Elasticity(E) and Shear Modulus (G) was owned by the composite with filler volume of 635.464 kg/mm2 dan 958.85 MPa Keywords : Composite, volume fraction, tensile strength, flexural strength
Uji Performansi Pencuci Biodiesel Metode Pengkabutan Air Dalam Minyak Argo, Bambang Dwi; Djoyowasito, Gunomo; Yulianingsih, Rini
Rekayasa Mesin Vol 1, No 2 (2010)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Washing of biodiesel removes contaminants (soap, catalyst, methanol and free glycerin) from biodiesel, even though this activity will sometimes cause an emulsion. This research aims to develop new method of washing that can minimize emulsification. The method used is misting water in crude biodiesel by certain nozzle. Washing apparatus has 5 main part i.e. nozzle, washing chamber, circulation pump, valve to set level of debit and piping channel. The research has been done to study dependency of biodiesel washing on the numbers of nozzles (2, 3 and 4) , the distance between nozzle and constrictor plate (2 cm, 4 cm, 6 cm and 8 cm) and the level of wash water debit 45.3 ml/min,83.6 ml/min and 150 ml/min . Parameters measured were pH of wash water, emulsion formed, rendemen of biodiesel, quality of biodiesel and energy consumption. Variation of the numbers of nozzles are purposed to have more extensively contact between water and biodiesel. At optimum level of debit, high performance biodiesel washing expeted, with little emulsion can be obtained. The research indicates that the numbers of nozzles, the distance of nozzle and level of water debit are significant variables to determine washing performance. The research showed that washing biodiesel with the numbers of nozzles 4 pc, debit of washing water 83.6 ml/min and 45.3ml/min and distance between nozzle and constrictor plate 8 cm produce 100 % biodiesel for every step washing, with pH of washing water at third washing 7.1 and emulsion formed 81.6 ml . Misting water in oil method needs smaller energy than others, i.e. only 4% of stirrer method and 1.2% of bubble method. Quality biodiesel – i.e. density, flash point, cetane index, cloud point, moisture content, viscosity – meets ISO standard. Keywords : Biodiesel, Washing, Emulsification, Energy

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