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MESIN
Published by Universitas Trisakti
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Mechanical Engineering
Arjuna Subject : -
Articles 6 Documents
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Search results for , issue " Vol 9, No 1 (2007): Bahan Bakar Alternatif" : 6 Documents clear
PERBANDINGAN KARAKTERISTIK SKD 11 MOD TERHADAP SKD 11 Ariobimo, Rianti Dewi Sulamet
MESIN Vol 9, No 1 (2007): Bahan Bakar Alternatif
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Abstract

As mentioned in the previous paper, SKD-11 Mod. is made to upgrade SKD-11properties especially in heat treatment process by modify its chemical composition. This research isconducted to see the improvement that SKD-11 Mod. gain compare to its origin metal, which isSKD-11.
PENENTUAN KUALITAS PELUMASAN MESIN Fajar, Rizqon; Yubaidah, Siti
MESIN Vol 9, No 1 (2007): Bahan Bakar Alternatif
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Abstract

The monitoring on commercial engine lubricants have resulted that the properties ofmost lubricants (synthetic, semi synthetic and mineral type) have met the requirements specifiedforcommon engine oil. However, significant variations have been found in the properties such asviscosity, viscosity index and additive contents (anti oxidant &detergent). Too high in viscosity willgive difficulty during engine staring and increases the fuel consumption. Meanwhile if the viscosity istoo low this will create more risks for engine damage (metal to metal contact). Some of the samplesfrom synthetic, semi synthetic and mineral lubricants have shown that the additives contents (antioxidant, antiwear anddetergent) are too low. Lower additive contents means that the service life ofthelubricants will be shorter than the usual recommendation. Most of mineral lubricants are too highviscosity at normal temperature of engine operation (lOffC). This will decrease the efficiencyfor theengine operations (highfuel consumption).
PENGARUH SUHU TERHADAP KONDUKTIVITAS BAHAN KOMPOSIT (AgI)0,3(p-Al203)0,7 DAN (AgI)0,5(B-Al203)0,5 Purwanto, P.; Purnama, Safei
MESIN Vol 9, No 1 (2007): Bahan Bakar Alternatif
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Abstract

The composite materials of (Agl)„rffi-AliOj),,? and (Agl)„5(p-Al20})ll5 have been madebysolid state reaction mixing between Agl with /3-AI20j. The results show that the conductivity valuesof (AgOoJp-AliOj),,- were 5.98xW5 to 9.47xIO3 S/m, and the conductivity values of (Agl),l5(p-Al?Os),)j were 0.33x/04 to 4.47x/03 S/m asfunction of temperature. The conductivity of materialscompositedecreased at transition temperature, but the conductivity ofAgl increased with temperature.The activation energy of (Agl)o.}(/3-A/20})„- and (Agl)„5(P-Al203),,5 relative stable with value ofactivation energy between 0.74xl02" J to 2.80x102" J. The diffraction peaks of (Agl),, /fi-Al:Oj)„. -and(AgQojffi-dljOjJoj have thepeak ofAgl.
APLIKASI TEGANGAN-REGANGAN EKIVALEN PADA PERHITUNGAN UMUR FATIK PADUAN AL 6063 UNTUK BEBAN AKSIAL DAN TORSI Suhartono, H. Agus
MESIN Vol 9, No 1 (2007): Bahan Bakar Alternatif
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Abstract

Tension-compression and torsion low cycle fatigue testing were conducted by straincontrol on Aluminum alloy 6063 thin wall tube specimens. The relation between type of loading anddeformation characteristics were recordedand analyzedfor calculating equivalent stress and strain.The Von Misses and Henckys equation can transform the shear stress-strain into equivalent stressstrainvery good which is proved by experimental result. The life prediction based on the calculatedequivalent straingive a satisfactory resultfor both type of loading.
KARAKTERISASIKERAMIK TERMISTOR Fe203:lmTi HASIL SINTER DAN PERLAKUAN PANAS Syarif, Dani Gustaman
MESIN Vol 9, No 1 (2007): Bahan Bakar Alternatif
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Abstract

This studywas done to know the effect ofTi02 addition on the characteristics qfFe203ceramics and the effect of a heat treatment at low temperature on the electrical characteristics ofFe203:lmTi ceramics including the mechanism ofits change as well. The Fe203:lmTi ceramics wereproduced bysintering some green pellets from mixture of 99.9 mole %Fe203 and I mole %Ti02 at1200°C for I hour in air. A heat treatment was carried out at 75(fC in air with a cooling rate ofTC/minute. Electrical resistivity ofthe ceramics was measured at different temperatures before andafter heat treatment. X-ray diffraction (XRD) analysis was done to know the crystal structure of theceramics and phases formed therein. It was known that the crystal structure of the Fe203 andFe203:lmTi ceramics was thesame i.e. that similar to hematite. The electricalcharacteristics showedthat the room temperature resistivity (psn) of the Fe203 ceramics drastically decreased with I mole %Ti02 addition and showedthat the (pSR) oftheFe203:lmTi ceramics increased significantly while thevalue of the thermistor constant (B) relatively did not change, after the heat treatment. The increase of(psn) after the heat treatment was caused by lessformation of oxygen vacancies which behave as theelectron sourcefor conduction band.
PENGUJIAN KARAKTERISTIK UNJUK KERJA TURBIN MIKROHIDRO DI DESA CIASMARA P., Bambang Teguh; Trisno, M. D.; Petot, Joni
MESIN Vol 9, No 1 (2007): Bahan Bakar Alternatif
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Abstract

Experimental study of performance characteristic of micro-hydro water turbine hasbeen done in Kabitpaten Bogor. In this study performance is defined as a turbine efficiency which isrepresented by ratio between mechanical energy provided by turbine and an available potential energyofwater at a various conditions offlow. The study was limited only at several variation ofwater flowrate because the turbine installation is only equipped by conventional control system. Water level inthe basin was measured by level water meter with the precision is around 10%, while water flow ratewas measured by bridge flow meter. Mechanical energy is calculatedfrom measurement ofrotationalmoment and rotation of shaft. The moment was measured by calibrated hydraulic dynamometer andthe shaft rotation was measured by stroboscope. Based on the test results, at the full capacity (0.305mlIs flow rate and 3.17 mhead) the turbine showed agood performance with the efficiency is around59%.

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