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<![CDATA[Corrosion Studies On Ss-321 In Natrium-Hydroxide Solution ]]>
<![CDATA[S., Marzuki]]>;
<![CDATA[Jodi, Heri]]>;
<![CDATA[Effendi, Nurdin]]>
<![CDATA[ MESIN Vol 9, No 3 (2007): Ocean Thermal Energy Conversion (OTEC) untuk "Pulau-pulau Kecil" ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas Trisakti ]]>
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<![CDATA[Corrosion Studies On Ss-321 In Natrium-Hydroxide Solution. Experimental corrosionstudies on commercial SS-321 have been carried out. The experiments were carried out in a sodiumhydroxide medium with a concentration variation of 0.4 M. 0.5 M, 0.6 M, and0.7Mcorresponding topHvalues of 13.6, 13.69, 13.78, and 13.84 respectively. The experiments were carried out using a type ofM-273 EG&Gpotentiostat/galvanometer test instrument. The post-corrosion samples microstructure wereanalyzed with the aid of EDS (energy dispersive spectroscopy) equipped SEM instrument to detect thepresence of any viable corrosion byproducts. Forfurther verification x-ray diffraction method was alsoused to detect any possible emerging corrosion byproducts on the samples surfaces correlated to theSEM-EDS result. Experimental results confirm that A1SI-321 commercial alloys immersed in a natriumhydroxide corrosion medium with a variation of concentration experience very little or almost nocorrosion, so that according to the so-called Fontanas criteria these test-materials turn out to have anexcellent resistance toward natrium hydroxide corrosion. This is also evidenced by the very low corrosionrate value measured in this study. EDS study and X-ray diffraction results indicate that the possibleensuing corrosion byproducts are iron oxides, chromeoxides and silicon oxides.]]>
<![CDATA[PENGARUH INKLUSI FASA-211 TERHADAP SIFAT LISTRIK SUPERKONDUKTOR YBa2Cu3O7-x. ]]>
<![CDATA[Sukirman, E.]]>;
<![CDATA[Adi, W. Ari]]>;
<![CDATA[Winatapura, D. S.]]>;
<![CDATA[Yustinus, Yustinus]]>
<![CDATA[ MESIN Vol 8, No 2 (2006) ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas Trisakti ]]>
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<![CDATA[Effect of the211-phase inclusion to the electrical properties ofYBa2Cu307.x superconductor grown bya melt-texturing process has been investigated. The qualitative andquantitative analysis was carried out bythe x-ray diffraction technique using the Rietveld methode andthe electrical properties were investigated bythefour pointprobe methode. The analysisresults showthat the highestcritical current density was obtainedon the 123-phase matrix containing 35 weight%ofthe211-phase. Due to the 211-inclusion in the 123-phase,thefluxflow phenomenon does not longer exist. The criticalcurrent Jc in the 123-phase increaseon accountofthe 211-inclusion, where as the Jc tend to increae with increasing the 211-phase content. The further of211-phaseincrease, however, lead to a decreaseofJc value.]]>
<![CDATA[Penelitian Kerusakan Pada Sebuah Pipa Ketel Uap ]]>
<![CDATA[Adnyana, D.N.]]>
<![CDATA[ MESIN Vol 9, No 2 (2007): MEMINIMALKAN KERUGIAN KAMPUS AKIBAT BANJIR ]]>
Publisher : <![CDATA[Program Studi Teknik Mesin, Universitas Trisakti ]]>
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<![CDATA[Failure Investigation on Ruptured Boiler Tube, This paper presents a failureinvestigation on a ruptured steam boiler tube. This boilertubewas madeoflow carbonsteel, having 76.1mm outside diameter and 5 mmthickness. Theboiler tube was installed in horizontal position on thefrontrear walls ofa steam boiler that was operated at steam pressure and temperature of60 bar and 275"C.respectively. The failure investigation was carried out by performing a number of examinationsincluding: macroscopy, metallography, hardness test and scanning electron microscopy (SEM) equippedwith EDS (energy dispersive spectroscopy). Results ofthefailure investigationshowed that thefailure onthe boiler tube was most likely caused by a short term localized overheating. The overheatingtemperature was estimated to have reached about 700 - 850°C. This was indicated by the formation ofbainite and/or martensite microstructure in some location of the ruptured tube material. Since no anysignificant scaleformation was observed in the tube internal wall, andalso no anyobvious indication ofpossible overheating due to a direct burner flame impingement toward the tube outside surface, it wastherefore concluded that the occurrence of short term localized overheating on the tube was mostprobably caused by low water level inthat particular part ofthe boiler tube.]]>
<![CDATA[Analisis Kekuatan Struktur Penopang Overhead Crane Kapasitas 2 x 20 Ton ]]>
<![CDATA[Supryanto, Joni]]>;
<![CDATA[Sukarnoto, Tono]]>;
<![CDATA[Soeharsono, Soeharsono]]>
<![CDATA[ MESIN Vol 10, No 1 (2019): Optimization in Renewable-Energy Conversion and Mechanical Design for National ]]>
Publisher : <![CDATA[Universitas Trisakti ]]>
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<![CDATA[This research investigated the design of the overhead crane supports with capacity of 2 x 20 ton. The crane design was modeled using both solids and surfaces, and the analysis was performed with finite element method. The results from the analysis verified the stress level, deflection level from crane column and runway beam, and the critical load of buckling for crane column to prevent the structure failure. The stress level result was compared to the material yield strength to find out whether or not the design is safe. It is concluded that the stresses arising from the rail beam and column are still within the permissible limits so that the design is safe to use. ]]>
<![CDATA[Pengaruh Penambahan Zat Aditif X terhadap Viskositas, Performa Mesin dan Emisi Gas Buang Sepeda Motor Honda CB150R ]]>
<![CDATA[Senoadi, Senoadi]]>;
<![CDATA[Adi, Supri]]>;
<![CDATA[Permatasari, Rosyida]]>
<![CDATA[ MESIN Vol 10, No 1 (2019): Optimization in Renewable-Energy Conversion and Mechanical Design for National ]]>
Publisher : <![CDATA[Universitas Trisakti ]]>
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<![CDATA[Mechanical contact is the process which can not be avoided in machinery system. The way to diminish thrist conditon which caused by the process is to give engine lubricant into that system. The lubricant resistance over the temperature system is influenced by base stock and its additives where contained of. Lubricant oil additives are chemical compounds that will improve or enhance the lubricant performance of base oil. These additives are carefully designed to ensure the functions in machines system. Engine lubricant that used in this research is MPX 1 SAE 10 W-30 and the additives that used is Engine Additive with brand Lupromax. The aim of this research is to analyze the reaction of increasing the additive EA over to viscosity and machine function of Honda All New CB 150R. In this research, it is found that the fusion with EA 5.25% (1200 ml lubricant with 63 ml additives) could: (1) reduce viscosity to 66.56 mm2/s and 9.9 mm2/s at temperatures of 40°C and 100°C, respectively, (2) enhance the torque and energy to 14.5 kW @9000 rpm and 12.23 Nm @7000 rpm with reducing the rate emision of CO to 0.44% vol, HC to 196 ppm vol, CO2 to 6.5% vol and enhancing the rate of O2 to 10.71%, and (3) reduce fuel consumption to 18.75 ml/km.]]>
<![CDATA[Pengaruh Suhu Gas-Plastik dan Air-Pendingin Kondensor terhadap Minyak yang Dihasilkan pada Proses Pirolisis Plastik ]]>
<![CDATA[Rangkuti, Chalilullah]]>;
<![CDATA[Rijani, Muhamad]]>
<![CDATA[ MESIN Vol 10, No 1 (2019): Optimization in Renewable-Energy Conversion and Mechanical Design for National ]]>
Publisher : <![CDATA[Universitas Trisakti ]]>
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<![CDATA[Nowadays, especially in big cities like Jakarta, there are a lot of people's needs every day and produce a huge amount of garbage which reaches 6000 tons dumped to Bantar Gebang landfill area every day and not to mention those which is not collected by scavengers. Of those garbage, 13%-14% of the waste is plastic type. In this study the distillation method is used. By pyrolysis method the plastic is heated and gasified to different temperatures before it goes to the condenser and converted to oil using different cooling water temperatures of the condenser. The results of this study, for 1 kg of plastic processed the optimum temperature of the gasified plastic of 90 oC with cooling water condenser temperature of 15 oC is producing 800 mL of plastic-oil, which is 68% of the weight of the plastic being processed. The plastic-oil produced is close to the type of gasoline.]]>
<![CDATA[Simulasi Getaran Sistem Diskrit Satu Derajat Kebebasan ]]>
<![CDATA[Rizky, Vega Amalia Eka]]>;
<![CDATA[Ganesha, Muhammad]]>;
<![CDATA[Sukarnoto, Tono]]>;
<![CDATA[Soeharsono, Soeharsono]]>
<![CDATA[ MESIN Vol 10, No 1 (2019): Optimization in Renewable-Energy Conversion and Mechanical Design for National ]]>
Publisher : <![CDATA[Universitas Trisakti ]]>
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<![CDATA[Equipment has been made to simulate a discrete system vibration of one degree of freedom. The aim is to obtain equipment for learning for students in the field of mechanical vibration. Vibration simulation includes free vibration and forced vibration of discrete system in one degree of freedom. The main parts of this equipment are rigid rods with mass of 2.6 kg, vibrators with mass of 3.385 kg, spring with stiffness of 3738 N/m and loading masses. A rigid rod of 0.775 m in length is supported by a hinge on one end and hung on a spring in another position. The vibrator is rotated by an electric motor and the rotation can be adjusted from 90-1600 rpm. The vibrator is mounted on a rigid object at the position of 0.285 m, 0.385 m, 0.485 m and 0.585 m from the hinge. A spring with stiffness of 3738 N/m is placed on a rigid object at the position of the hinge. The loading masses of 1.08 kg and 2.08 kg are mounted on a rigid beam in a row at the position of 0.685 m from the hinge. For the free vibration experiments, the natural frequency for each position of vibrator is searched experimentally and theoretically. It is found that the results of the two are similar. For the forced vibration experiments, graphs of vibrational responses are constructed in the frequency domain, then the resonance frequencies are compared to the natural frequency results from the free vibration experiment. Apparently the results are very close. This shows that the research equipment made is reliable and can be used as a student learning tool.]]>
<![CDATA[Perancangan dan Pemodelan Turbin Darrieus untuk Pembangkit Listrik Tenaga Arus Laut (PLTAL) ]]>
<![CDATA[Prayoga, Wahyu Adi]]>;
<![CDATA[Permatasari, Rosyida]]>
<![CDATA[ MESIN Vol 10, No 1 (2019): Optimization in Renewable-Energy Conversion and Mechanical Design for National ]]>
Publisher : <![CDATA[Universitas Trisakti ]]>
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<![CDATA[Sea current energy is one of the new and renewable energy that is currently being developed to replace fossil energy which is starting to deplate its availability. Sea current energy research continues to be developed. One of the studies that can be developed is modeling laboratory-scale sea currents, so that it is necessary to design a model of Sea Current Power Plants that aims to improve the process of understanding the energy. In this design, a model of Sea Current Power Plant with a capacity of 150 Watt is designed using the Darrieus Turbine. The design results some data such as : diameter of 428 mm for turbine rotor, height of 327 mm for turbine rotor, chord length of 0.04 m for 3 NACA 0018 airfoil blades, and a transmission ratio of 1 : 5 for transmission systems using a straight gear gearbox. In addition, the turbine generated 205.5 rpm rotation at flow rate of 1.15 m/s with turbine efficiency of 40%.]]>
<![CDATA[Analisis Kekuatan Struktur pada Gerbong Datar ]]>
<![CDATA[Andreas, Teddy]]>;
<![CDATA[Sukarnoto, Tono]]>;
<![CDATA[Soeharsono, Soeharsono]]>
<![CDATA[ MESIN Vol 10, No 1 (2019): Optimization in Renewable-Energy Conversion and Mechanical Design for National ]]>
Publisher : <![CDATA[Universitas Trisakti ]]>
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<![CDATA[The PPCW railroad flatcars is railroad flatcars used to transport container loads with a maximum load capacity of up to 42 tons. In its use, these railroad flatcars are used to transport the cement bags in the pallet arrangement resulting in crack in the bottom frame of the PPCW railroad flatcars structure. The purpose of this analysis is to find out stress value and deformation value that occurred in the railroad flatcars due to the cement bags loading. The analysis process begins with modeling according to the original size of the railroad flatcars which is then followed by providing the support, gravity, loads, and material specifications used. Based on the result of analysis that has been obtained from the load of cement bags of 546,000 N and ratchet lashing of 900,000 N on the frame of PPCW railroad flatcars, we obtained the maximum von Mises stress value of 231.91 MPa arising on the bottom frame of the PPCW railroad flatcars structure as the site of cracking and the maximum total deformation value of 19.526 mm arising in the center of the railroad flatcars. The PPCW railroad flatcars made from SS400 with yield strength value of 245 MPa. Therefore, it was found that the value of stress arising in the railroad flatcars is still in the safe area and is allowed.]]>
<![CDATA[Perancangan Alat Penyambung Universal pada Transporter Mini Tandan Buah Segar Kelapa Sawit ]]>
<![CDATA[Arkeman, Arlimda]]>
<![CDATA[ MESIN Vol 10, No 1 (2019): Optimization in Renewable-Energy Conversion and Mechanical Design for National ]]>
Publisher : <![CDATA[Universitas Trisakti ]]>
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<![CDATA[Every palm oil plantation has different characteristics. In Indonesia, some of the palm oil plantations are unique because of its peaty, muddy, and bumpy features. Today, the existing Fresh Fruit Bunch (FFB) transport equipment is rigid and unable to follow the contour of outline of plantation ground, which limits its mobility. Therefore, it is necessary to design FFB transport equipment that offers ease of mobility. The new design has a universal joint feature that connects the front of part of the equipment (driver section) with the load carrier part (rear part). The design includes three-dimensional images with its simulations, two-dimensional images and the strength analysis of the joint. Both design drawings and strength analysis are carried out using SolidWorks engineering software. The result is a design of a universal joint with a dimension of 0.2 m in length and 0.15 m in width, and is capable of rotating in two directions; each at 30 degree on Y axis and 16 degree on X axis. All components of the universal joint are SS400 steel which has a tensile strength of 250 MPa. Calculation of strength with a tensile load of 1 ton results in a safety factor of 833. This safety factor ensures the maximum life span and strength of the universal joint.]]>
