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Jurnal Poros Teknik Mesin Unsrat
Published by Universitas Sam Ratulangi
ISSN : -     EISSN : 28088166     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Poros Teknik Mesin Unsrat (JPTMU) merupakan jurnal yang diterbitkan oleh Jurusan Teknik Mesin Fakultas Teknik Universitas Sam Ratulangi dengan periode penulisan dua terbitan per tahun pada bulan Juli dan November. Artikel yang diterbitkan mencakup bidang Teknik Mesin dan Teknik Industri.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 139 Documents
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OPTIMASI DIAMETER POROS TERHADAP VARIASI DIAMETER SPROKET PADA RODA BELAKANG SEPEDA MOTOR Daswin Basselo; Stenly Tangkuman; Michael Rembet
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 3 No. 1 (2014): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

The rear wheel shaft of a motorcycle is classified as an axle which is supporting the bearing so that the rear tire rotated well. This study is aimed to get the optimum diameter of shaft which is capable of withstanding the load in accordance with the existing load conditions, and analyzing the torque ratio between the front and rear sprocket which have varied diameter. Optimization modeling program is using Matlab 2010. Optimization is done by using objective variable function accompanied with constraints in terms of stress and deflection on the rear axle while supporting the loads. The results of Optimization are Do 14 mm and Di 12,0889 mm, 12,0817 mm, 12,0627 mm, 12,0597mm with factory standard power of motorcycle (8426,41 Nm/s) which is complying to optimization rules.  The optimization result shows the decreasing of  inner diameter of the shaft along with increasing the sprocket’s diameter. Key word : Shaft, optimization, outer diameter (Do), inner diameter (Di).
INTEGRASI FMEA DAN ANALISIS SWOT UNTUK PEMILIHAN TINDAKAN KOREKSI PROSES DISTRIBUSI GAS ( STUDI KASUS DI PT. ANEKA GAS INDUSTRI BITUNG ) Hasyim Pakudu; Agung Sutrisno; Johan S.C. Neyland
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 3 No. 1 (2014): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

In gas industry , gas is distributed to customer in the form of gas tube. Empty gas tube from customer will be refilled in filling plant. In its operation, gas distribution is consisting of two activities,  namely, delivering gas and picking up empty tube. Based on its historical data, PT. Aneka Gas Industri once in a while facing an  operational failures. One of the solution proposed is applying FMEA (Failure Mode and Effect Analisys)  method. From its application it is observable some critical and some potential corrective measures. In order to consider  internal and external aspects of company operation, SWOT Analisys is  integrated into the FMEA method. Results of integrating SWOT Analisys into FMEA Method used to determine Correctional measures taken. Key word : Gas Distribution, FMEA method, SWOT Analisys,  correctional measure  
UNJUK KERJA POMPA AIR SHIMIZU TYPE PS-128 BIT YANG DIFUNGSIKAN SEBAGAI TURBIN AIR Harison B Situmorang; Gerrits D Soplanit; I Nyoman Gede
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 3 No. 1 (2014): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

ABSTRACTUtilization of water pump Shimizu Type PS-128 Bit which functioned as a water turbine for Micro Hydro Power Plant (MHPP) is an effort in the search for alternative energy in a simple and easy in term of manufacturing and assembling. Principally, the water pump is used to suck the water from a lower surface and raise it to a certain height. The basic of working of a pump is the opposite of a water turbine, and therefore can function as reaction water turbine, in which water from a certain height rotate the pump impeller.Testing the water pump Shimizu Type PS-128 Bit as a water turbine is carried out in the Laboratory of Mechanical Engineering University of Sam Ratulangi. The “reaction turbine” is driven by four water pumps which connected in series and parallel. It aims to get different heights (head) and flow rate (Q).Flow rate and the load on the dynamometer (W1) has been determined, as the lowest round “reaction turbine” that is charged with the force (N) certain turbine cannot rotate. So that initial water discharge is determined by Q = 31 liters/minute. Based on the research that has been done that the power generated depends on the rotation, H and Q. The maximum power generated Pm = 12 watt is at Q = 37 liters/minute, H = 18 m, and n = 1080 rpm.Keywords: Pump, Reaction Turbine, Head, Flow rate.
EFEKTIVITAS PENUKAR KALOR TIPE PLATE P41 73TK Di PLTP LAHENDONG UNIT 2 Harlan Egeten; Frans Palobo Sappu; Benny L Maluegha
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 3 No. 1 (2014): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

One way to keep a plant operate optimally is keeping the effectiveness of the components properly. One of the components used in the production process is heat exchanger. In PLTP Lahendong unit 2 is used as a the cooler lubricant system of generator and turbine is using type of plate P41 73TK heat exchanger.This research objective is to determine the effectiveness of the heat exchanger plate type PLTP Lahendong P41 73TK. Calculation are using formulas that correspond to the type of heat exchanger plate and plate heat exchanger assuming that analyzed as a tube.Results of the calculations shows that the effectiveness of plate heat exchanger on the methods of LMTD is 83,3%, obtained by the thermal heat exchanger effectiveness of 55.6% and effectiveness based on method of NTU is 30.3%.Keywords : Effectiveness, type heat exchanger plate, LMTD method, method of NTU
SIMULASI NUMERIK ALIRAN FLUIDA DALAM PENSTOCK DENGAN MENGGUNAKAN COMPUTATIONAL FLUID DYNAMICS (CFD) Gilang Ramadhan Supit; Hengky Luntungan; Benny L Maluegha
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 3 No. 2 (2014): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

Indonesia has a potential water power resources that can be generated into electricity through hydro power plant (PLTA) and micro hydro power plant (PLTM). The water from the reservoir flow down to the turbine in a penstock, therefore the analysis of the characteristics of the fluid flow in penstock is interesting. This research worked out with a simulation to find the characteristics of fluid flow in the penstock using Computational Fluid Dynamics (CFD) by applying software GAMBIT 2.3.16 and Fluent 6.3.26. Penstock dimension was using the data available and was simulating to find out the characteristics of the flow. The dominant fluid flow characteristics are static pressure, dynamic pressure, total pressure, fluid velocity and shear stress. Result show that for static pressure in inlet 305.769,9 Pa, default-interior 305.769,9 Pa, wall 305,769,9 Pa and outlet 300.009,8 Pa. The dynamic pressure in inlet 3.595,365 Pa, default-interior 4.253,647 Pa, wall 3.602,503 Pa and outlet 4.229,900 Pa. The total pressure in inlet 309.365,3 Pa, default-interior 309.365,3 Pa, wall 309.365,3 Pa and outlet 304.235,4 Pa. The velocity of fluid in inlet 2,681554 m/second, default-interior 2,916727 m/second, wall 2,684047 m/second and outlet 2,908574 m/second. The shear stress in inlet 5,175604 Pa, default-interior 9,589236 Pa, wall 9,589236 Pa and outlet 9,518271 Pa. Keywords: Penstock, Computational Fluid Dynamics (CFD), Fluid Flow Characteristics
PEMANFAATAN AIR PANAS BUMI UNTUK ALAT PENGERING GABAH DI BUKIT KASIH KANONANG Glendi Umbas; Frans Palobo Sappu; Tertius V Y Ulaan
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 3 No. 2 (2014): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

Traditionaly heat from the sun is employ in drying. The weakness is drying time relatively too long and weather can not be controlled. The utilization of spring water in Bukit Kasih Kanonang for drying of grain is an alternative that does not depend on weather conditions. The spring water heats the plate, then hot of plate directly in contact with the grain. It is causes the grain receiving heat and evaporate the water in the grain, them the grain dried well. From this research, it can be concluded that the drying time effect on grain’s moisture content linearly. The longer the drying time, the lower the moisture content of grain. In this research, the process of drying grain with water temperature 60 0C is enough dry the grain as 2, 104 kg during 5.13 hours. Keywords : Grain, Spring Water, Bukit Kasih Kanonang
ANALISIS POTENSI AIR PANAS DI BUKIT KASIH KANONANG UNTUK PENGERING GABAH Reyvo Rully Dien; Tertius V Y Ulaan; Romels C A Lumintang
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 3 No. 2 (2014): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

This study is intended to analyze thehot spring water potential at Bukit KasihKanonang by studying the influence of water level toward the water contents reduction ofunhulled rice mass after drying process has been done.Unhulled rice drying process has been examined on the dryer for five days with thevaried water level. The examination was being done in five hourseach day, starts at 9.00a.m till 02.00 p.m WITA (the local time of middle Indonesia).The result of analysis shows that the percentage of the ideal water contentreduction stand on the position level water with height 15 cm which is 72.470 %. The mostoptimal heat transfer rate of the unhulled rice stands on level 10 cm with the drying timeof 5 hours and cross-sectional size of the dryer is 50 x 50 cm.Keywords : Hot spring Water, Unhulled-Rice Drying, Drying Temperature
PENGARUH PENGELASAN LISTRIK TERHADAP SIFAT MEKANIK PADA ALAT ANGKAT KENDARAAN NIAGA KAPASITAS 2 TON Hendra Tumurang; Rudy Poeng; Romels C A Lumintang
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 3 No. 2 (2014): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

In the process of the commercial vehicle lifting equipment production, there are many joining processes done by using electric welding. To find out the effect of the process, the tensile strength of the welding process is necessary to be tested. The information of welding strength on the commercial vehicle components is obtainable from the tensile test that has been done over the twelve specimens with the standard rectangular cross-section from the result of welding process. The results of the tensile test show the data of loading and extension that occurred which was then processed to obtain the value of the stress, strain and curves of each specimen. Testing from the specimen it is obtained that the yield strength 461.538 N/mm2, the tensile strength of 536.325 N/mm2, tenacity 2,451%, the elastic modulus of 353.955 N/mm2, resilience and toughness 0.652 and 876.363 N/mm2, with an error rate of 5%. The strength of the electric welding showed no significant difference compared to the strength without joining, and did not provide a great influence on the mechanical properties of commercial vehicle components lifting capacity of 2 tons, with an error of 5%. From this experiment it is concluded that electric welding on the equipment can provide sufficient safety. Keywords: Vehicle lifting components, electric welding, mechanical properties
PERHITUNGAN WAKTU DAN BIAYA PADA PROSES PEMESINAN BENDA UJI TARIK Christian Aidy Mosey; Rudy Poeng; Johan S C Neyland
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 4 No. 1 (2015): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

A machine tool must be able to produce high-quality product. But a skilled operator also required. The process of workpiece production begins with planning a logical working steps, such as: specifying the type of machine tool’s process and selecting the materials to be used. The production process is not only related to the technology, but also related to  the cost factor and the production speed to achieve the target and optimum profits. In the tensile test, the specimen is standardized according to the tensile machine that will be used. The shape of the tested specimen is essential in order to avoid cracking or facture in the grip or others areas. The purpose of this study are determining the average time of machining proces and getting the total cost of production of machining process of a tensile test specimen. The tensile test specimen were subjected on this experiment has a circular cross-sectiolan shape which made from concrete steel with the lathe machining proces. Based on the result of the process of time and cost calculation, the tensile test specimens has an average machining time of 161,733 minutes per specimen and the cost Rp. 63.483 per specimen. Keywords: Process time, production cost, the tensile test specimen
OPTIMASI BIAYA PROSES KARENA VARIASI KECEPATAN DAN KEDALAMAN POTONG PADA POROS AISI-1040 MENGGUNAKAN MESIN BUBUT KNUTH DM-1000A Jolly Victor Aseng; Jotje Rantung; Rudy Poeng
JURNAL POROS TEKNIK MESIN UNSRAT Vol. 4 No. 1 (2015): Jurnal Poros Teknik Mesin Unsrat
Publisher : Fakultas Teknik Jurusan Teknik Mesin Universitas Sam Ratulangi

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Abstract

This research was aimed to optimize a lathing cost by varying the cutting speed and cutting depth. A test was perfomed on 27 steel shaft AISI-1040 test objects with diameter of 25 mm and 150 mm long each, in order to obtain the optimum cutting time and cost in a lathing process. It was found that higher the cutting speed, the lower the total production cost, while the cutting depth does not affect the total production cost. The optimum average machining time is 3.153 minute/test object and the lowest total production cost is Rp.5,653/test object. The optimization made the target to minimize the total production cost was reached in cutting speed of 1600 rpm and cutting depth of 1,00 mm, with total production cost of the lathing process of the 27 test objects as much as Rp.16,960 Keyword: Optimization, Lathe, Cutting time, Production cost

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