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INTERNATIONAL JOURNAL OF MECHANICAL COMPUTATIONAL AND MANUFACTURING RESEARCH
Published by Trigin Publisher
ISSN : 23014148     EISSN : 29623391     DOI : 10.35335/MECOMARE
Core Subject : Engineering,
Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Mechanical Engineering
International Journal of Mechanical Computational And Manufacturing Research invites you to consider submitting original research papers for possible publication after peer review. The scope of this international, scholarly journal is aimed at rapid dissemination of new ideas and techniques and to provide a common forum for significant research and new developments in areas of Mechanical Computational And Manufacturing Research.
Arjuna Subject : Teknik (semua kategori) - Komputasi Mekanik
Articles 95 Documents
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Static Simulation of Speed Bump Structure Alloy Concrete Foam And Polymeric Foam With 1, 2 And 3 Inch Cavity Variations Using Ansys 14.5 Software Dino Hastrino
International Journal of Mechanical Computational and Manufacturing Research Vol. 11 No. 1 (2022): May: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

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Abstract

Speed bump (vehicle speed limiter) is elevated sections of road in the form of additional asphalt or cement that are strung across the street for a sign of slow down. Functions that enhance safety for users jalan.Material to manufacture high speed bumprelatif this cause expensive production costs and the impact on the selling price and therefore new dilakukanPenelitian of natural fiber from oil palm empty fruit bunches (EFB). Abundant raw materials due to oil palm empty fruit bunches (EFB) often become waste is estimated to be quite economical and developed into an environmentally friendly alternative material. The purpose of this study is to simulate the static loading on the speed bump of foam concrete materials and fiber reinforced polymeric foam EFB using Ansys 14.5 software. in this study specimens to be tested 10 models and simulated static on the upper side to determine the stress distribution at the speed bump. Speed bump modeled using SolidWorks software in 2012 and was simulated using ANSYS software compared to 14.5 for voltage distribution. In this study, found that of the static simulation results at top speed bump we concluded that the total minimum voltage deformation occurs in the model bump with casing of 0.94628mm speed and maximum voltage contained in the model of speed bump of 3 inches of concrete 1,2343mm, Equivalent Elastic Strain the minimum speed bump 1 contained in the model of 0.013427 inches, and Equivalent Elastic maximum strain contained in the model of speed bump with a casing of 0.023304, while the minimum Maximum Principal Stress contained in model 3 inches of concrete speed bump for 0.002801Mpa, and Maximum Principal Stress maximum contained in the model speed bump with a casing of 0.016959MPa.
Study of Diesel Engine Performance Using Variations of Dexlite Fuel Mixture and Corn Seed Oil Samuel JW Siagian
International Journal of Mechanical Computational and Manufacturing Research Vol. 11 No. 1 (2022): May: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

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Abstract

Due in the world population continues to increase so the need for fossil fuels also increased. This is what requires us to look for other sources beyond oil and gas, or that can be said alternative fuel. Alternative fuel not only to solve the scarcity problem but also a problem of air pollution caused by fossil fuels. This alternative fuel can be obtained from the seeds of the rubber, corn, tobacco, oil seeds, sunflower seeds, and others where at designated for diesel engines. This study aims is to analyze the performance of TD–115. From this Research diesel engine using corn biodiesel mixture Dexlite fuel by using (Dexlite, Dexlite + 5% Biodiesel, Dexlite + 10% Biodiesel, Dexlite + 15 % Biodiesel, Dexlite + 20% Biodiesel, Dexlite + 25% Biodiesel). Found that the Power (P) decrease up to 40, Specific Fuel Consumption (SFC) of the mixture increase up 48 Thermal Actual Brake Efficiency ( decrease up to 41%, rate of mass fuel (mf) decreased to 59%, Volumetric Efficiency ( ) decreases to 19%, Heat Losses decrease up to 74%, Air Fuel ratio decreased to 44%.
Implementation of Total Productive Maintenance with Overal Equipment Effectiveness (Oee) Method to Determine Maintenance Strategy for Digester Plant Machines (Case Study of PT. Toba Pulp Lestari, Tbk) Juna Gelisman Edward
International Journal of Mechanical Computational and Manufacturing Research Vol. 10 No. 3 (2021): November: Mechanical Computational And Manufacturing Research
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Abstract

This study analyzed the implementation of Total Productive maintenace (TPM) on the machine Digester using Efectiveness Overall Equipment (OEE). Total Productive Maintenance (TPM) is to increase the productivity of the equipment and production equipment with an investment of treatments as necessary to prevent major losses occurred 6 (Six Big Losses). Six Big Losses are causing these losses are: Losses due to damage to the equipment (Breakdown Losses), losses due to the installation of equipment (Set-up and Adjustment losses), losses due to operate without load or paused (Idling and minorstoppages), losses due to the decline production speed (Speed Reduced losses), losses due to product defects in the process (Rework losses), the losses due to the low yield (Yield / Scrap losses).Based on the results of the calculation of OEE values in the machine Digester during the month of June 2015 - May 2015 obtained availability value=97.6% meet the standard JIPM by 90%, performance efficiency = 95.22% meet the standard JIPM by 95%, quality of rate = 97.00% this condition is not JIPM meet the standards of 99%, and the yield value of OEE = 90.20% is considered a world-class production. This score is a score that is suitable to serve as a long-term goal. The factor that has the greatest percentage of factor six big losses are idling and minor losses amounted to 50.98%, reduce speed losses of 23:59%, yield/scrap losses 14:49% set up and adjustment of 10:20%, Breakdown losses amounted to 0.78%. and to increase the value of OEE replacement of genuie spareparts are used to replace the damaged spare parts.
Solar Energy Driven Adsorption Cycle Cooling Machine Performance with A Collector Area Of 1 M2 And A Collector Inclination of 30o Daniel C Sibarani
International Journal of Mechanical Computational and Manufacturing Research Vol. 10 No. 3 (2021): November: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

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Abstract

Solar Energy is the biggest energy on the earth, solar enegy in Indonesia can be utilized for variety of things. Based on solar radiation data collected from 18 locations in Indonesia, solar radiation for West Indonesia area has reached 4,5 kWh/m2/day with monthly variation about 10%, while East Indonesia area has reached about 5,1 kWh/m2/day with monthly variation about 9%. Therefore, the solar energy can be utilized as the main source of energy for the adsorptionrefrigeration cycle cooling machine to produce cooling effect. In this research, the main component of this machine consist of collector/adsorber, condenser, and evaporator. The surface area of this collector/adsorber is about 1m2and tilted at 30o. The collector filled with about 18,5 kg of activated carbon, meanwhile the evaporator filled with 5 Litres of methanol. The chilled media is 4 litres of water. This experimental lasts for three days, divided by two periods that are desorption process and adsorption process. The result from this experiment was the collector can adsorb solar radiation with daily average about 7.093.769,356 Joule and could decrease the water temperature become 1,85oC at first adsorption cycle, while the ambience temperature about 26,9oC.
Testing of Solar Powered Adsorption Refrigeration Machine With Collector Area 1m2 Collector Angle 0o Efsartua Butarbutar
International Journal of Mechanical Computational and Manufacturing Research Vol. 10 No. 3 (2021): November: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

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Abstract

The sun is one of potential renewable energy resources. One of the utilization of solar energy as the main source of energy for the adsorption refrigeration cycle cooling machine to produce cooling effect. In this research, the type of collector used is flat plate collector. Collector insulation on refrigeration machine use plywood, EVA foam, styrofoam, rockwool, and glass. The surface area of collector is 1 m2 with thick of the plate is 1 mm. In this reasearch carbon active used is technical carbon active/granular filled in collectors as much as 18,5 kg,methanol used is pro-analysis with purity 99,9% as much as 5 liters, and water as cooling medium as much as 6 liters. Tilt angle of collector in this reasearch is 0o. From this reasearch obtained lowest temperature of water is 9,98 oC. Highest total energy absorbed by collector as much as 3,186 MJ with ambient temperature about 28,6 oC
Performance Study of Single Cylinder Diesel Engine Using Pertadex Mixed Fuel with Rice Bran Biodiesel Ady Ansyari Sirait
International Journal of Mechanical Computational and Manufacturing Research Vol. 10 No. 3 (2021): November: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

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Abstract

Increasing population, and limited resources of oil into so many things that encourage us to do the research and development of alternative fuels, one of which is the use of rice bran to produce biodiesel. Indonesia as the world's third largest grain, bran produced in large quantities. The content of free fatty acids (Free Fatty Acid (FFA)) is high, rice bran can be converted into Biodiesel. This study aims to analyze the performance of diesel engines using alternative fuel mixture Pertadex with 5%, 10%, 15%, 20%, 25%, 30% biodiesel rice bran. Stages of work done in this study, the manufacture of biodiesel by transesterification process, blending biodiesel with Pertadex, testing calorific value in a bomb calorimeter, and performance testing of diesel engines. From the analysis, it is concluded, greater the addition of a mixture% biodiesel Rated Power, volumetric efficiency, the actual Thermal Efficiency and Heat Loss tended to decline, while the rate of material flow baar (mf) and specific fuel consumption (SFC) Tend to increase.
Effect of Guide Blade Opening on Cavitation Level at the Inlet Side of the Vertical Francis Turbine Suction Pipe Unit 4 Stairway Hydroelectric Power Plant at PT Inalum Power Plant Solomon PT Sinaga
International Journal of Mechanical Computational and Manufacturing Research Vol. 10 No. 3 (2021): November: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

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Abstract

PLTA Tangga P.T. Inalum Power Plant is one of company that has thelargest power plant in Indonesia. Type of turbine which is used by that company is Vertical Francis Turbine which has problems in operation. One of kind problems is cavitation. Cavitation is the process of forming water bubbles on turbine because of water pressure on turbine drop becomes vapor pressure, that effects vibrations,erosion, and efficiency drop. Cavitation phenomenon can be predicted and be avoided by calculating the cavitation level of turbine, is a comparison of actual Thoma number and critical Thoma number. Cavitation level that is observed is in Entrance of Vertical Francis Turbine Draft Tube Unit 4 PLTA Tangga P.T. Inalum Power Plant. Cavitation level as the dependent variable that is searched for the influence to Guide Vane Opening (GVO) as the independent variable in this experiment. The total of GVO that is used in this experiment is nine variation, there are 102 mm; 132 mm; 161 mm; 168 mm; 176 mm; 183 mm; 186 mm; 191 mm; and 195 mm. Based on this experiment, we can know the cavitation level on every GVO. The highest cavitation level in this experiment is 0.96867 on GVO 195 mm, meanwhile the lowest cavitation is 0,81005 on GVO 102 mm. The entrance of the draft tube can happen the cavitation if the cavitation level is more than 1 or actual Thoma number is more than critical Thoma number. Cavitation can not happen on it if the cavitation level is less than 1 or actual Thoma number is less than critical Thoma number. So the best GVO for avoiding cavitation in the Entrance of Vertical Francis Turbine Draft Tube Unit 4 PLTA Tangga P.T. Inalum Power Plant is 102 mm because it has the lowest cavitation level, meanwhile the GVO that is avoided and the most vulnerable cavitation is 195 mm because it has the highest cavitation level.
Noise Reduction Simulation on Usu Nvc Unmanned Aircraft With Capsuling Method Using Ansys 15.0 Software Ahmad Fiqri Oemry
International Journal of Mechanical Computational and Manufacturing Research Vol. 10 No. 2 (2021): August: Mechanical Computational And Manufacturing Research
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Abstract

USU (University of North Sumatra) Unmaned Aerial Vehicle use DLE (data life engine) gasoline engine 30 machine as motor. The machine is classificassed as 2 stroke machine that produced major noise on vehicle. To fix the noise need study and further reaserch about acoustic or sound science. This research use capsuling method to ruduce noise factor and use rockwool as acoustic material. This study was conducted to look at the characteristics of acoustic material produced by the drone of the variation of engine speed at 3000, 4000, 5000, 6000, and 7000 rpm with a measurement distance of 1 meter. Tests done by simulation using FEM software by dividing the four major components, namely testing model airframe, engine, exhaust, and the capsuling draft. Directions were used in the simulation are horizontal, vertical, and axial (X +, X-, Y +, Y-, Z +, Z-). From the results of the simulation capsuling methods on DLE gasoline engine 30, capsuling method has no effect either to decrease the noise in the axis Y- and more dominant produces noise reduction is evenly distributed on the Y axis +. The highest noise value is generated at 7000 RPM on the Y axis and the lowest at 3000 RPM on the Y axis +. From the simulation results produced the greatest reduction in the amount of 11.9 dB on the Y axis + with a round of 3000 rpm and the smallest reduction in the amount of 0.15 dB on axis Z + with a round of 6000 rpm. The greater the rotation of the engine will be highly effective against acoustic material properties in damping vibrations that occur, so that contour noise that occurs will be scattered and produce fluctuations in the plane of unmanned aero vehicle geometry.
Analysis of Solar Collector Adsorption Cooling Machine Using 3D Simulation John Peter Simanjuntak
International Journal of Mechanical Computational and Manufacturing Research Vol. 10 No. 2 (2021): August: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

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Abstract

Solar Energy is the biggest energy on the earth, solar enegy in Indonesia can be utilized for variety of things. Based on solar radiation data collected from 18 locations in Indonesia, solar radiation for West Indonesia area has reached 4,5 kWh/m2/day with monthly variation about 10%, while East Indonesia area has reached about 5,1 kWh/m2/day with monthly variation about 9%. Therefore, the solar energy can be utilized as the main source of energy for the adsorption refrigeration cycle cooling machine to produce cooling effect. The simulation object of this research is collector, which simulated with Fluent Ansys 15.0 software and modeled with 3D CAD software. The surface area of this collector is about 1m2,covered with 2 glass covers and tilted at 0o The result from this simulation is the theoretical solar energy that adsorbed into collector about 10,472 MJ, average temperature at upper collector plate about 92,5℃, average temperature at lower collector plate about 89,95 ℃, and average temperature at upper glass cover about 82,92℃.
Analysis of Air Heater Usage With Steam Heat Source Extracted From Turbine Against Fuel Savings Recovery Boilers Frans Ferdinand Situmorang
International Journal of Mechanical Computational and Manufacturing Research Vol. 10 No. 2 (2021): August: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

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Abstract

Electricity is one of the biggest needs in Indonesia, especially in the fields of industry, therefore, every industry should be able to meet its own electricity needs. One company that can meet the needs of industry's own electricity is PT. Toba Pulp Lestari Tbk. The need for electricity met by operating two units of thermal power generation is Multifuel Boiler and Recovery Boiler. Recovery Boiler is a unit Boiler special used to purify compounds-chemical compounds inorganic contained in Black Liquor (waste cooking of the digester) as well as a steam generator of high pressure (High Pressure Steam. There are also some of the factors supporting the recovery boiler including: soot Blowing system, Medium Pressure steam, Low Pressure steam, Condensate, Electrostatic Precipitator (ESP). the air flow system in the recovery boiler which air enters through secondary air fan to the water heater, in the water heater outside air is heated using steam results from the extraction of the turbine, while to heat the steam into steam superheat before entering to turbine used flue gas originating from the combustion of fuel supplied to the superheater 2, superheater 1, and economizer is further from the economizer flue gas directly in the exhaust into the atmosphere through the chimney. In this study, obtained the heat absorbed water heater is equal to 7,525,904 kJ/ hour. The heat absorbed from the water heater ANSYS analysis calculations amounted to 9,854,555.38 kJ/h and fuel savings after using the tool air heating (air heater) is approximately 883 liters / hour. The fuel savings after using the tool air heating (air heater) from ANSYS analysis calculation is equal to 1,115 liters / hour. And to the calorific value which absorbed components in the boiler can be a data-data following data: HTS heat energy absorbed by 11,633,444 kJ/ hour, the heat energy absorbed by LTS 15,740,779 kJ / h and heat energy absorbed Economizer amounting to 21,516,347 kJ / h.

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