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MESIN
Published by Universitas Trisakti
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Mechanical Engineering
Arjuna Subject : -
Articles 8 Documents
 1 
Search results for , issue " Vol 9, No 2 (2007): MEMINIMALKAN KERUGIAN KAMPUS AKIBAT BANJIR" : 8 Documents clear
Pengembangan Perangkat Lunak Untuk Pengukuran 2D Berbasis Citra Triyono, Triyono; Aditya, Aditya
MESIN Vol 9, No 2 (2007): MEMINIMALKAN KERUGIAN KAMPUS AKIBAT BANJIR
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Software Development for 2D Measurement Based on an Image. Theprincipal ofdigitalimage measurement program is transferring a taken image object to computer to be process to digitaldata andfrom digital data to numeric value. Digital camera and USB can be used as transferring dataequipment, and to retain the objectflatness, a measurement table is used as the based. The imageobjectthat shownin the computer monitor will be use as a guidefor the dimensional measurement by choosingthesurface target area. The dimension attain is theresult ofthe Cartesian coordinate system reading ofthe measured imageobject. The superiority ofthissoftware is the object can beplaced anywhere aroundthe measurement table. The software is made with Visual Basic language and can be usedfor objecttharare: easy to deflect, electrostatic free, small and thin.
Simulasi Efek Ukuran dan Lokasi Kebocoran Pipa Pendingin Reaktor Nuklir Menggunakan Fasilitas Eksperimen UUTR.Mod-l Antariksawan, Anhar R.; Juarsa, Mulya; Prasetyo, Joko; Sumarno, Edy; Kiswanta, Kiswanta; Handoyo, Ismu
MESIN Vol 9, No 2 (2007): MEMINIMALKAN KERUGIAN KAMPUS AKIBAT BANJIR
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Experimental Simulation of The Effect of Size and Location of Coolant Pipe Break inNuclear Reactor Using UUTR.Mod-l. Several experiments of LOCA with various break size andlocations have been conducted using UUTR.Mod-l testfacility. The break sizes studied are 2 mm, 5 mmand 10 mm, each at hot-leg and cold-leg side. The initial conditions ofthe experiment are 1 MWofpower,primary side pressure of 155 bar approximately, coolant flow rate of 9.8 kg/s and only accumulator isfunctioned as emergency coolant. Both at hot-leg and cold-leg, the break size of 2 mm showed slowerpressure decrease rate and the occurrence of temperature increase early after break. For larger breaksize, pressure decrease is faster and showed rod temperature excursion due to rod uncovering.Concerning the breaklocation, in large break area, cold-leg breakshowed heater temperature excursionearly than in case of hot-leg break. Size and location of break determine the timing of event and, asconsequence, different behavior of response system. In any cases to prevent the fuel temperatureexcursion, the addition ofautomatic depressurizationsystem and installation ofinjection system in upperhead ofpressure vessel have been consideredin the nuclearreactor design.
Corrosion Studies on SS-321 in Sodium-Chloride Solution Medium Effendi, Nurdin; Wihatmoko, Wihatmoko; Jahja, Aziz K.
MESIN Vol 9, No 2 (2007): MEMINIMALKAN KERUGIAN KAMPUS AKIBAT BANJIR
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Corrosion Studies on SS-321 in Sodium-Chloride Solution Medium. Experimentalcorrosion studies on commercial SS-321 have been carried out. The experiments were carried out in asodium chloride medium with a concentration variation of 0.4 mol. 0.5 mol, 0.6 mol, and 0.7 molcorresponding topH values of 7.0, respectively. The experiments were carried out using a type ofM-273EG&G potentiostat/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 anypossible emerging corrosion byproducts on the samples surfaces. Experimentalresultsconfirm that AISl-321 commercial alloys immersed in a sodium chloride corrosion medium with avariation of concentration experience very little or almost no corrosion, and that according to the socalledFontana s criteria these test-materials turn out to have an excellent resistance toward sodiumchloriccorrosion. This is also evidenced by the very low corrosion rate value measured in this study.EDSstudy and X-ray diffraction results indicate that thepossible ensuing corrosion byproducts are ironoxides, chrome oxides, iron chlorides, and nickel hydrideoxide.
Kombinasi Preventive Dan Reactive Maintenance Dengan Simulasi Sistem Dinamik Subiantoro, Sigit
MESIN Vol 9, No 2 (2007): MEMINIMALKAN KERUGIAN KAMPUS AKIBAT BANJIR
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Combination of Prepentive and Reactive Maintenance Using Dynamic SystemSimulation. Maintenance system holds an important role in a company establishment. Less optimal ofmaintenance system will cause disturbance to the production process. To overcome this problem, aquantitative approach model contains of complexion factors was proposed as a solution. Base on thismodel, simulation ofsolution is made by using dynamic system principle and Powersim software. Fromthree scenario wich have been proposed, the scenario third is most optimal, that is suppressingmaintenance costfraction to 5 %value, increasing thepreventive maintenance (PM- 10)fraction valueand decreasing valuefraction ofreactivemaintenance (RM- 0.8).
Pembuatan Keramik Dielektrik Dari Sistem (ZnO-TiO2) Pada Suhu Sinter 1450°C dan Karakterisitiknya Firmansyah, Lutfi; Suhandi, Andi; Syarif, Dani Gustaman
MESIN Vol 9, No 2 (2007): MEMINIMALKAN KERUGIAN KAMPUS AKIBAT BANJIR
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Abstract

Formation Dielectric Ceramic from (ZnO-TiOJ System at 1450C SinteringTemperature and Their Characteristics, Synthesis of dielectric ceramics from (ZnO-TiOJ system at145&C and their characterization had been carried out. This investigation was done in order to knowthepossibility of the application of the ceramics for dielectric ceramics. The ceramics were produced bymixing powder ofZnO and Ti02 with the concentration in such away so that the concentration ofTiO?larger than thestoichiometric concentration ofZn2Ti04 andbysintering at I450"C. Characterization wascarriedout through XRD, microstructural and electrical analyses. The XRDand microstructure analysesshowed that the (ZnO-TiOJ system ceramics formed Zn2.xTi.x04 solid solution which accompanied bytheformation ofZn vacancy defect. No second phasefound in the ceramics. Lattice constant ofthe Zn2.xTii x04solid solution decreasedfollowing the increase ofthe concentration ofTi02 excess (expressed byx). The Ti02 excess affected the grain size of the Zn2.xTi, x04 ceramics although the effect was notsignificant. At high temperature, the excess of Ti02 increased the dielectric constant and dissipationfactor. The ceramicsproduced in this work had relatively low dielectric constant and loss tangent andgood stability in relation to temperature change, so they can be applied as ceramic substrate andcapasitor dielectric.
Pengaruh Strategi Lintasan Pahat; Raster Dan 3D Offset Terhadap Kerataan Dan Kesejajaran Produk Cahyati, Sally
MESIN Vol 9, No 2 (2007): MEMINIMALKAN KERUGIAN KAMPUS AKIBAT BANJIR
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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The Influence of Tool Path Strategies; Raster and 3D Offset to Flatness and Parallelismof Product. Parallelism of two surfaces is one of geometrical tolerance that can measure after theirtolerances offlatness are known. The parallelism andflatness are two geometrical characters thatusually require bystandardizedplates ofmould. Tool path ofmilling machine ona surface plateis one ofthing that influences their character. In this paper, geometrical character offlat plane surface that hadbeen machined by raster tool path strategy and 3D offset strategy will be analyzed. The result ofexperiment can beusefor refinement ofmachining strategies toachieve an optimized machining.
Pengujian Karakteristik Unjuk Kerja Radiator Prasetyo, Bambang Teguh
MESIN Vol 9, No 2 (2007): MEMINIMALKAN KERUGIAN KAMPUS AKIBAT BANJIR
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Radiator Performance Characteristic Test. Test ofradiatorperformance characteristic atvarious flow rates has been done. The test is aimed to verify the specification given by vendor and todefine radiator performance, such as temperature effectiveness (e), Number of Transfer Unit (NTU) andpressure drop at around of design condition as a solution ofrating problem. Based onthe test results thisradiator was well designed. Temperature effectiveness variesaround60 to 85% and NTUshowed a goodagreement with the theoretical model. The different are around 0.1% to 5.3%>. Pressure drops are stillaccepted by design criteria. Especially for airside, the pressure drops arearound 29 to 392 Pa which arestill inferiorsthan 900Pa.
Penelitian Kerusakan Pada Sebuah Pipa Ketel Uap Adnyana, D.N.
MESIN Vol 9, No 2 (2007): MEMINIMALKAN KERUGIAN KAMPUS AKIBAT BANJIR
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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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.

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