ROTOR: JURNAL ILMIAH TEKNIK MESIN
ROTOR merupakan jurnal yang diterbitkan oleh Jurusan Teknik Mesin Universitas Jember yang memuat artikel ilmiah dalam bidang Konversi Energi, Design/Perancangan, Teknik Produksi, Material serta bidang lain yang terkait dengan Teknik Mesin. Semua naskah yang diterima ROTOR diterbitkan secara global dalam bentuk elektronik. Hasil penelitian yang diterbitkan dalam jurnal ini diharapkan dapat menambah khasanah pengetahuan di bidang Teknik Mesin serta menjadikan sarana bagi para profesional baik dari dunia usaha, pendidikan, ataupun peneliti untuk menyebarluaskan perkembangan ilmu pengetahuan dan teknologi di bidang Teknik Mesin melalui publikasi hasil penelitian.
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<![CDATA[PENGARUH PENGARUH BENTUK DAN KONFIGURASI ALUR SEKAT TERHADAP UNJUK KERJA MENARA PENDINGIN (COOLING TOWER) ]]>
<![CDATA[Hamid Abdul]]>;
<![CDATA[Karim Lailul]]>;
<![CDATA[Jamroni Mohammad]]>;
<![CDATA[Qiram Ikhwanul]]>;
<![CDATA[Gatut Rubiono Rubiono]]>
<![CDATA[ ROTOR Vol 10 No 2 (2017) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Jember ]]>
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DOI: 10.19184/rotor.v10i2.5291
<![CDATA[The cooling tower is mechanical equipment which used to decrease hot waste water. One of the factors that influence the performance is the filling components. This research is aimed to get the effect of buffle’s shape and configuration due to cooling tower performance. The cooling tower performance is described with range, heat transfer rate, and efficiency. The research is done by an experiment using laboratory scale cooling tower. The shape is varied as circle and triangle with 2-3 and 3-2 in a row configuration. The water flow rate is adjusted with 3 valve opening. Water temperature inlet is varied as 50, 60 and 70oC. The measurements are taken for inlet and outlet water and air temperature for 3 times measurements using K-type thermocouples. The result shows that buffle’s shape and configuration have an effect due to cooling tower performance. Keywords: cooling tower, performance, buffle’s shape, configuration]]>
<![CDATA[INVESTIGASI NUMERIK VIV (VORTEX INDUCED VIBRATION) PADA DIAMETER KABEL HYDROPHONE 0.04 M SISTEM AKUSTIK BAWAH AIR ]]>
<![CDATA[Maria Margareta Zau Beu]]>;
<![CDATA[I Putu Andhi Indira Kusuma]]>
<![CDATA[ ROTOR Vol 10 No 2 (2017) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Jember ]]>
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DOI: 10.19184/rotor.v10i2.6387
<![CDATA[The 2D numerical simulation of an underwater acoustic system undergoing VIV (Vortex Induced Vibration) which is in position parallel to 5 m distance with variation of hydrophone cable position. The diameter of the hydrophone cable in use is 0.04 m, with Reynold numbers (Re) variations of 13000, 15000, 17000, 19000, 21000, 23000, 25000, 27000 and 30000. Position variations are used to determine the flow pattern characteristics that occur behind the cylinder as well the maximum value of drag coefficient (CD) and lift coefficient (CL). The simulation results show that the characteristic flow pattern around a cylinder at each Re value indicates the release of the vortex behind the cylinder with different drag and lift coefficient values. Keywords: Vortex Shedding, Hydrophone, Acoustic System]]>
<![CDATA[ANALISIS PENGARUH SERAT LIMBAH TEFLON TERHADAP SIFAT MEKANIK KOMPOSIT FIBER SEBAGAI MATERIAL PENGGANTI ALAS COR BETON ]]>
<![CDATA[Hendra Aryanta]]>;
<![CDATA[Abdullah Ma’ruf]]>;
<![CDATA[Khanif Khoirul F]]>;
<![CDATA[Nurida Finahari]]>
<![CDATA[ ROTOR Vol 10 No 2 (2017) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Jember ]]>
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DOI: 10.19184/rotor.v10i2.7653
<![CDATA[Teflon wastes are slightly difficult to recycle because the recycle products have different characteristic. Teflon wastes in flake form can used as alternative composite material. This research is aimed to get the effect of teflon waste due to mechanical properties of fiber composite. The research is done with laboratory experiments. Three different kind of Teflon which are white, blue and grey are studied. Teflon fiber compositions are varied as 0, 50, 70 and 90% of composite volume. The fibers are varied in length as 2, 3 and 4 cm, with 1 mm in width and thickness. Tensile tests are conducted for specimens with ASTM D-4762 standard. Charpy impact tests are conduct for specimens with with ASTM E 23 standard. The crack of the specimens are visualized with a digital camera. The result shows that Teflon fiber has effect due to mechanical properties. White Teflon tend to have greater tensile and impact strength rather grey and blue Teflon. The increase of Teflon composite volume tends to increase tensile and impact strength. Teflon length also tends to increase tensile and impact strength. Keywords: teflon, waste, composite, mechanical properties]]>
<![CDATA[PENGGUNAAN METODE KOMPUTERISASI DALAM PENENTUAN TAHANAN KAPAL TANKER ]]>
<![CDATA[Erik Sugianto]]>;
<![CDATA[Hendika Puji Haditama]]>
<![CDATA[ ROTOR Vol 10 No 2 (2017) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Jember ]]>
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DOI: 10.19184/rotor.v10i2.6392
<![CDATA[The ship resistance is influential to choose the ship's main engine, especially tankers that have large block coefficients. In general, ship resistance was obtained by modeling the vessel on a certain scale and then testing on the experimental tank. However, this test requires high funding, because testing requires special places such as towing tanks that have expensive operating costs. This research is intended to get ship prisoner with computerized method for tanker ship. Then the result is validated by Holtrop mathematical approximation method. The result of computerized method for speed 11.4 knots got the value of ship resistance is 86.2 KN. While the method of mathematical approach generated ship resistance is 74.38 KN. So the ship's resistance used to determine the tanker machine is 86.2 KN. Keywords: Ship resistance, tanker, computerized]]>
<![CDATA[PENGARUH KONSENTRASI INHIBITOR UBI UNGU TERHADAP LAJU KOROSI BAJA KARBON A53 DENGAN MEDIA AIR LAUT ]]>
<![CDATA[Ridho Unggul Nur Rahmadi]]>;
<![CDATA[Imam Sholahuddin]]>;
<![CDATA[Dwi Djumhariyanto]]>
<![CDATA[ ROTOR Vol 10 No 2 (2017) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Jember ]]>
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DOI: 10.19184/rotor.v10i2.7655
<![CDATA[Corrosion is a form of damage that occurs in metals. The main factor is the cause of the corrosion environment. A53 steel is a type of low carbon steel and a steel material types that are widely used for pipe applications. The use of a corrosion inhibitor is one way of preventing corrosion. Anthocyanin substances contained in purple yam can be made in a natural inhibitor, because the substance is an antioxidant anthocyanin which is an oxidation inhibitor. Variables used were varied concentration of 0 ppm, 2000 ppm, 4000 ppm and 6000 ppm. This study aims to determine the rate of corrosion, purpel sweet potato extract efficiencies and changes in microstructure. The method used in this study is experimental, inhibitor efficiency analysis, ANOVA test and analysis micro photo. The results showed that the material is corroded by pitting corrosion and uniform shape. Values on concentration lowest corrosion rate of 0.0044 mmpy 6000 ppm and 6000 ppm at the highest efficiency of 72.70%. Keywords: anthocyanin, steel A53, natural inhibitor, purple sweet potato.]]>
<![CDATA[SIMULASI PENGARUH STEAM-TO-CARBON RATIO DAN TUBE OUTLET TEMPERATURE TERHADAP REAKSI STEAM REFORMING PADA PRIMARY REFORMER DI PABRIK AMONIAK ]]>
<![CDATA[Muhammad Natsir Hakiki]]>;
<![CDATA[Muslikhin Hidayat]]>;
<![CDATA[Sutijan Sutijan]]>
<![CDATA[ ROTOR Vol 10 No 2 (2017) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Jember ]]>
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DOI: 10.19184/rotor.v10i2.6393
<![CDATA[Steam reforming, the reaction in Ammonia plant between natural gas and H2O becoming H2 and CO/CO2, is occurred in Primary Reformer and being completed in Secondary Reformer. In Primary Reformer, the reaction commonly occurred at 450-800oC and 36 bars. The endothermic reaction occurred in Ni-based catalyst inside the tube. The heat for this reaction came from the heat of reaction of combustion in the furnace (outer-tube). The flow of H2 will increase along with the increasing flow of the feed gas and the heat transferred from outer-tube to inner-tube. In the other side, there will be energy increasing. So there’s a need of optimization. The need of energy influenced by many parameters e.g. Steam-to-Carbon Ratio (S/C) and Tube Outlet Temperature (Tout) of Primary Reformer. Commonly S/C is 3.20 and maximum Tout is 800oC. That’s why; optimization was conducted by energy calculation at various S/C and Tout. Firstly, reaction and heat transfer in inner-tube and outer-tube were modeled, so we can get the data of temperature and gas composition outlet inner-tube. Then, energy consumption which came from process gas, fuel gas and steam generation was calculated. The range of S/C 2.70-3.70 and Tout 700oC-800oC were chosen for the simulation. The simulation result shown that the need of energy per kmol-H2 outlet Primary Reformer at S/C 3.20 and Tout 800oC was 573.11 MJ/kmol-H2. The need of energy per kmol-H2 outlet Primary Reformer at S/C 3.50 and Tout 780oC (20oC below common Tout) was 573.01 MJ/kmol-H2. It means that decreasing Tout (for tube lifetime increasing) must be compensated with increasing S/C. Keywords: Primary Reformer, Steam to Carbon Ratio, Tube Outlet Temperature]]>
<![CDATA[PENGARUH LAMA WAKTU PENGGETARAN ULTRASONIC BATH TERHADAP SIFAT MEKANIK DAN MORFOLOGI PATAHAN BIOKOMPOSIT PATI TAPIOKA/SERAT RAMI (BOEHMERIA NIVEA) ]]>
<![CDATA[Mochamad Asrofi]]>;
<![CDATA[Hairul Abral]]>;
<![CDATA[Anwar Kasim]]>;
<![CDATA[Adjar Pratoto]]>;
<![CDATA[Herwin Gevin]]>;
<![CDATA[Melbi Mahardika]]>
<![CDATA[ ROTOR Vol 10 No 2 (2017) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Jember ]]>
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DOI: 10.19184/rotor.v10i2.5574
<![CDATA[This study reported about mechanical properties and fracture surface of ramie fiber reinforced tapioca starch based biocomposites. The amount of fibers in matrix was kept constant at 10% from dry weight starch basis. Fabrication of biocomposites was solution casting. The effect of vibration duration from ultrasonic bath was 0, 15, 30, and 45 min. This treatment was applied to biocomposites while gelatinized. Tensile test was carried out to determine the mechanical properties of biocomposites. Fracture surface of biocomposites after tensile test was observed by using scanning electron microscopy (SEM). The result shows that, tensile strength increased when vibration time was added. The maximum tensile strength was obtained at 45 min vibration time with 2,84 MPa. This phenomenon was supported by SEM observation which indicate compact structure. Keywords: Tapioca starch, ramie fiber, biocomposites, mechanical properties, SEM]]>
<![CDATA[ANALISA TRANSPORTASI PALM OIL MILL EFFLUENT DARI PABRIK KELAPA SAWIT KE PEMBANGKIT LISTRIK TENAGA BIOGAS DI RIAU ]]>
<![CDATA[Ardhi wahyu Eka]]>;
<![CDATA[Hasan Iqbal Nur]]>;
<![CDATA[Khumaidah Nur]]>
<![CDATA[ ROTOR Vol 10 No 2 (2017) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Jember ]]>
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DOI: 10.19184/rotor.v10i2.6486
<![CDATA[The delivery of Palm Oil Mill Effluent (POME) by the Palm Oil Mill (POM) of Tanah Putih (60,000 tons / year) and POM Sei Buatan (30,000 tons / year) through the river ship represents 78% of POME's total supply requirement for Biogas Power Plant (BPP) Tandun, Riau. How to get recommendations on routes, ship types and most optimum ship sizes is important. The optimization is done by analyzing the transportation including the investment and then comparison between the modes with some alternative routes on the existing segment, the actual condition limitation and the minimum criterion of total cost. The result of analysis shows that for POME delivery the optimum route is port to port using 1 unit of SPOB vessel with 1,500 ton capacity for each segment. The optimum ship type is Self Propelled Oil Barge (SPOB) when compared to Self Propelled Container Barge (SPCB) and Landing Craft Tank (LCT) and Tank Truck with 8 ton capacity. The total cost for ship procurement is Rp 8,035 billion. The amount of POME delivered can generate 9 million kWh of electrical power. Total revenues from electricity sales and electricity cost savings of the factory amounted to Rp 8.774 billion, resulting in a gross profit of Rp 739 million Keywords: Transportation Analysis, Palm Oil Mill Effluent, Biogas Power Plant]]>
<![CDATA[SIFAT MEKANIK DARI BIOKOMPOSIT FILM PATI UBI KAYU DENGAN PENGUAT SERAT AKAR BUAH NAGA (HYLOCEREUS POLYRHIZUS) ]]>
<![CDATA[Melbi Mahardika]]>;
<![CDATA[Hairul Abral]]>;
<![CDATA[Anwar Kasim]]>;
<![CDATA[Syukri Arief]]>;
<![CDATA[Mochamad Asrofi]]>
<![CDATA[ ROTOR Vol 10 No 2 (2017) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Jember ]]>
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DOI: 10.19184/rotor.v10i2.5579
<![CDATA[Dragon fruit root fiber used as a reinforcement in the biocomposites film of cassava starch. The production method of biocomposites film was solution casting. The cassava starch serves as the matrix in the biocomposites film. The variation of amount fiber in matrix was 2, 4 and 6% from dry starch weight basis. Isolation of dragon fruit root fiber used alkalization and bleaching process with NaOH, NaClO2 and CH3COOH, respectively. Glycerol was used as plasticizers. Mechanical properties of biocomposites was determined by tensile test. The result shows that, tensile strength increased 200% after the addition of 6% fiber compared to pure starch film. Tensile test data was supported by X-Ray Difraction (XRD). Keywords: Biocomposite, Cassava Starch, Dragon fruit root fiber, Mechanical properties, XRD.]]>
<![CDATA[PERANCANGAN MESIN PEMERAS LENDIR BIJI KAKAO (DEPULPER) TIPE ROTARY UNTUK MENINGKATKAN MUTU BIJI BUAH KAKAO DESA SUMBERAGUNG KABUPATEN BANYUWANGI ]]>
<![CDATA[Nuraini Lusi]]>;
<![CDATA[Afandi Akhmad]]>;
<![CDATA[Catrawedarma IGNB]]>;
<![CDATA[Anam Chairul]]>
<![CDATA[ ROTOR Vol 10 No 2 (2017) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin Fakultas Teknik Universitas Jember ]]>
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DOI: 10.19184/rotor.v10i2.6493
<![CDATA[The purpose of this activity is to improve the productivity of the farmers in the success of cocoa fruit through the use of appropriate technology for the separation of coco seeds / squeezer machine, with the application of this technology is expected to assist farmers in the production process so that the quality results of cocoa produced will be more optimal. Cocoa bean separator machine serves to accelerate the process of separation of salut which during this process is still manually and takes a long time. This salute separator machine as much as possible the process is easy and the results are really on target. The main objective of making cocoa depulper is to assist cocoa farmers in the process of harvesting and improving the quality of crops so that the needs of cocoa farmers can be fulfilled. Keywords: cocoa, salute, depulper, rotary system]]>
