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MEKANIKA – Jurnal Teknik Mesin Fakultas Teknik, Universitas 17 Agustus 1945 Surabaya Jalan Semolowaru No. 45, Surabaya 60118 Telepon: (031) 5931800 Negara: Indonesia
Location
Kota surabaya,
Jawa timur
INDONESIA
MEKANIKA - JURNAL TEKNIK MESIN
Published by Universitas 17 Agustus 1945 Surabaya
ISSN : 24603384     EISSN : 26863693     DOI : belum tersedia
Core Subject : Science, Engineering,
Energy Engineering Mechanical Engineering
MEKANIKA – Jurnal Teknik Mesin adalah jurnal ilmiah yang diterbitkan oleh Fakultas Teknik, Universitas 17 Agustus 1945 Surabaya. Jurnal ini bertujuan untuk mewadahi hasil-hasil penelitian, studi eksperimen, kajian analitis, maupun pengembangan teknologi di bidang keteknikan, khususnya teknik mesin. Ruang lingkup jurnal meliputi termodinamika, perpindahan panas, sistem pendingin dan tata udara (HVAC), energi terbarukan, konversi energi, mekanika fluida, desain mesin, manufaktur, sistem kontrol mekanik, dan otomasi teknik.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 15 Documents
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Search results for , issue "Vol 1 No 02 (2015): December" : 15 Documents clear
KAJI EKSPERIMENTAL PENGARUH VARIASI DIAMETER NOZZLE DAN DIAMETER RUNNER TERHADAP DAYA DAN EFISIENSI MODEL TURBIN PLETON ., Supardi; Pramana, Chandra
MEKANIKA: Jurnal Teknik Mesin Vol 1 No 02 (2015): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

Pelton turbine is one type of impulse turbine, type of water turbine which works to change the available whole energy of water such as pressure, potential, and speed into kinetic energy to rotate turbines. Runner whichconsist of a number of blades is the main component on Pelton turbine when the turbine rotates because the force ofwater at high speed out of nozzle. Impulse reactions occur because the water jets hit the blades causing torque ofturbine shaft causing runner will continue rotates for object hit the blades. Experimental assessment was conductedto investigate effect of nozzle diameter variations as a media to transmit water and runner diameter variations asthe main media for generating mechanical energy in power and efficiency of the Pelton Turbine models in FluidLaboratorium August 17, 1945 University of Surabaya as a prototype model of Micro Hydro Power Plant( MHPP ). Stages of research was done by designing and planning some variation of the nozzle diameter and runnerdiameter with reference using head and flow capacity of available water pump. Specified parameters and variablesused for experimental assessment is single nozzle with diameter 0,006 m and 0,009 m and runner with diameter 0,15m, 0,17 m and 0,19 m. Blades used half cylinder shape with the specifications, width 0,036 m, length 0,027 m, depth0,00081 m, blade gap width 0,001 m, and the distance of center water emmision to blade tip 0,00135 m. From thetest results, variations of nozzle with diameter 0,006 m and runner with diameter 0,15 m produces the largestturbine power 49,53 watt, the best turbine efficiency of 87,97%, and the largest generator power 10,56 watt.Meanwhile, the variation nozzle with diameter of 0,009 m and runner with diameter 0,15 m, generating the bestgenerator efficiency 52.43%. From the characteristics graph of Pelton turbines, found same trend with the theorythat the efficiency of the turbine decreasing after reaching the maximum efficiency speed ratio of 0,46 and higherturbine efficiency directly proportional to turbine power produced.Keyword : Pelton Turbine, Nozzle, Runner, Power, Efficiency
PENGARUH DAN SUDUT KAMPUH PENGELASAN TERHADAP KEKERASAM DAN KERETAKAN PADA LAS SMAW DENGAN ELEKTRODA E7018 Sasono, Djoko; Kusuma, Indra
MEKANIKA: Jurnal Teknik Mesin Vol 1 No 02 (2015): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

Pengaruh arus dan sudut kampuh Pengelasan Terhadap Kekerasan dan keretakan pada Las SMAW Dengan Elektroda E7018.”Comparison journal with Joko Santoso, 2006. TM, FT, UNNES "Welding current Effect AgainstTensile Strength and Toughness Las SMAW with E7018 Electrodes" .Penelitian uses low alloy steel materials,materials treated with a variety of welding current 100 Ampere, 130 Ampere and 160 Amper using reverse polarityDC SMAW welding electrode E 7018 with a diameter of 3.2 mm. Seam type used is seam V with an angle of 60 °. The value of tensile strength and yield stress to specimen quality force tensile low alloy steel welding current 160Ampere group the highest compared with those variations welding current of 100 amperes and 130 amperes and rawmaterials group. Its value has increased by 44.84 MPa to values of tensile strength and 84 MPa for the yield stressvalue of the raw materials group. The value of the extension and increased cross-section reduction compared to thegroup and the group 130 100 Amper Amper, but decreased compared with those raw materials.This study aims to determine the effect of welding current against violence, the corner seam welds and cracks levels1,2 and 3 on the SMAW welding electrode E7018. This study uses a low alloy steel material treated wi th a variety ofwelding currents of 80 A and 180 A with a seam angle of 60 ° and 80 °, using SMAW welding DC polarity inverted with E7018 electrode diameter of 3.2 mm. DC reverse polarity that the electrode holder is connected to the positive pole and the metal stem is connected tothe negative pole. Specimens carried hardness testing and cracking levels 1,2 and 3, Hardness of weld joint highestin the group of specimens of 60 ° to 180 A which is worth 181 HB for angle of 80 ° to 180 A and 181 HB, the lowe stvalue obtained angle of 80 ° with 80 A whose value is 141 HB, to an angle of 60 ° to 80 A HB 156 value from thedata above is taken the average - average, for the position of HAZ According to the results of this study concludedthat with the variation of the welding current is very influence in welding materials and therefore contributes toviolence. Keywords are current, angle, SMAW, violence, rift, E7018.
EFEKTIFITAS VASRIASI PUTARAN DARI PROSES BALANCING TERHADAP PUTARAN KERJA POROS YANG SESUNGGUHNYA Sulistyono, Djoko; Budiman, Arief
MEKANIKA: Jurnal Teknik Mesin Vol 1 No 02 (2015): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

Balancing the goal is to balance the machine or the rotating shaft, which in turn will reduce the vibration.Balancing is done pasa shaft-disk system by responding vibration in five rounds variations balancing: 400 rpm,600rpm, 800rpm, 1000 rpm, 1200 rpm. Retrieval of data by performing the balancing process which furtherbalancing process that responds to vibrations to determine the mass of unbalancenya and a counterweight on theshaft angle disc. Results balancing is then rotated in the other rounds to determine the effectiveness of balancing hasbeen done to change round. The purpose of this test is to get round the balancing effective. The test results showedthat the balancing process is able to reduce the vibration conducted properly, this indicates that balancing is doneon a round shaft below the critical round-the dish is less effective. In addition, the balancing is done on rotationaway from a critical lap is relatively effective. While balancing is done on a round close with a round of critics isrelatively effective. Balancing process that is performed in the round balancing is far from critical rotation hasadvantages over balancing the work done at the round when viewed in terms of security while balancing process isdoneKeywords: balancing, spindle disc, critical round
ANALISA PENGARUH VARIASI TEGANGAN LISTRIK DAN JARAK ANODA DENGAN KATODA PADA PROSES ANODISASI TERHADAP TINGKAT KILAP MATERIAL KOMPOSIT AL – ABU DASAR BATUBARA Santoso, Edi; Rohman, Fatehur
MEKANIKA: Jurnal Teknik Mesin Vol 1 No 02 (2015): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

Composites have been developed in the world of manufacturing especially Metal Matrix Composites ( MMCs ). It is light resistant to corrosion, and mechanical properties has been successfully repaired in variousstudies, make this material superior in terms of durability. But the appearance need to be improved to obtain a highdecorative value through anodizing process. Coloration process using this anodizing method has been used forcoloring aluminum metal. Anodizing process carried out by the independent variable electrical voltage between 8,10, and 12 Volt and anode cathode distance 0.10, 0.15, and 0.20 m with 10 minutes of processing time. Colorationresults are tested using test equipment gloss sheen Micro-Tri-Gloss with reflection angle of 85. The results showedthat the variation of the electric voltage supplied to the anodizing process proved to be able to give much influenceon the vulnerable 8 , 10 , and 12 Volt. Material reflectance values tend to decrease. This happens because thehigher the voltage , the greater the material pore. The same is shown on the chart the influence of sulfuric acidconcentration and the voltage of the pore diameter. In the graph shows an increase continuously - as you constantlygiven electrical voltage. Anode cathode distance variation on the anodizing process also proved sufficient to providea significant influence on susceptible 0.10 , 0.15 , and 0.20 m. Material reflectance value tends to increase with theaddition of anode cathode spacing. Such things happen because of the obstacles posed increasingly stable , theformation of smaller pore structure and equitable causes deposition of dye attached to the surface of the object isflat and the color quality is increasing. The highest reflectance values obtained at a voltage of 8 volts of electricitywith the anode cathode spacing 0.15 m. While the lowest reflectance values obtained at a voltage of 10 volts ofelectricity with the anode cathode spacing 0.10 m.Keywords : anodizing , voltage, anode cathode spacing , reflectance
PERANCANGAN KONDENSOR ALAT PENYULING BIOETANOL KAPASITAS 20 TON NIRA / HARI Mufti, Moch.; Santoso, Iwan Bagus
MEKANIKA: Jurnal Teknik Mesin Vol 1 No 02 (2015): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

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Abstract

Bioethanol (C2H5OH) is a one biofuel the present as alternative fuels more environmentally friendly and nature the renewable. The alternative fuel is processed from plants that has the advantage of being able to lose shareof CO2 emissions Up to 18%, compared with stock emissions fossil fuels such as kerosene (Anonymous, 2007a).Bioethanol can be produced from various raw materials, Many are in Indonesia, only prayer is Sorghum. So it is verypotential processed for review and developed because raw material is very well known.The principle is simple distillation of ethanol is separating air by its boiling point. Pure ethanol boiling temperatureof 79oC, while the pure air boils at 100oC. When the lack of ethanol-water mixture is heated, then at ambienttemperature 79oC ethanol will already boil and evaporate, while the air yet. With set temperature we can separateair between the steam ethanol.Keywords: Bioethanol, Sorghum, distillation

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