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ANALISIS VARIASI LUASAN HEATSINK TERHADAP UNJUK KERJA MODUL GENERATOR TERMOELEKTRIK (TEG) MEMANFAATKAN PANAS BUANGAN KONDENSOR KULKAS Wiradika, Yudha; Ilminafik, Nasrul; Junus, Salahuddin; Hardiatama, Intan; Nashrullah, M Dimyati
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Heat energy is generally only used by humans for heating an object and then heat wastefully into the environment without being converted into other energy. This study aims to find out how to utilize waste heat from 6U type refrigerator condensers by using thermoelectric generator modules. This study uses an experimental method that is used to compare the performance of a thermoelectric generator to convert waste heat from a condenser to a variation of 120cm2, 96cm2, and 72cm2 heatsink area. In the study taken every 5 minutes for 2 hours this results in a declining value. The variation of the 120cm2 heatsink area produces a temperature difference of 12.4oC - 9.4oC, the output power is 0.00119 Watts - 0.00072 Watts, and produces an efficiency of 0.014% - 0.011%. In testing the variation of 96cm2 heatsink area, it produces a temperature difference of 8.1oC - 5.3oC, the output power is 0,00055 Watt - 0,00025 Watt, and produces an efficiency of 0,010% - 0,007%. In testing the variation of the 72cm2 heatsink area it produces a temperature difference of 6.9oC - 4.5oC, the output power is 0,00042 Watts - 0,00019 Watts, and produces an efficiency of 0.009% - 0.006%. Of the three variations of the heatsink area that have been tested, the variation of the 120cm2 heatsink area produces the best results compared to other heatsink area variations.

PENGARUH SUDUT DEFLEKSI GEAR TAB ELEVATOR TERHADAP STICK FORCE PILOT PADA PESAWAT N-219 Pribadi, Dicki Hendri; Koekoeh KW, Robertoes; ., Sumarji; Syuhri, Ahmad; Rudi Sugara, Imam
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Indonesia geographically is an archipelagic state that has been recognized by international community according to the PBB law of the sea then was ratified by Indonesia into UUD No.17 of 1985. The number of island in Indonesia currently according to BPS is 17.504 island, that makes Indonesia become the largest archipelagic country in the world and make potentially to have pioneer of aircraft. N-219 Aircraft produced by PT.Dirgantara Indonesia is a pioneer of aircraft that has been developed in Indoensia. Aircraft must meet the flight feasibility criteria to ensure flight safety. One of criteria is the value of a stick force pilot (FE), the force that the pilot receives to control the control surface of an aircraft. Regulation value of the stick force pilot reference is Civil Aviation Safety Regulation (CASR) part 23. The method used in this study is modelling the equations of the motion of the control surface balance tab with the elevator. This study seeks to find the optimum equation to meet the CASR23 regulation where the value of the stick force (FE) is ≤ 75 lbs. The result showed the optimum stick force pilot (FE) value in this modelling is equation III . In critical flight conditions the deflection of the balance tab is not enough to meet the design criteria, trim tab deflection (ẟtrim = 0 – 5˚) is used to reduce stick force pilot value and meets CASR23 regulation. In SLS condition all equation modelling meets the design criteria, where the maximum value stick force pilot (FE) is 51 lbs. keyword : stick force pilot, hinge moment, balance tab, trim tab, elevator.

ANALISIS PENGENDALIAN KUALITAS PRODUK KALENG SARDEN DENGAN MENGGUNAKAN SEVEN TOOLS ., Samsuri; Dwilaksana, Dedi; Sidartawan, Robertus; Darsin, Mahros; Dwi Hidayatul Qoryah, Rika
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Quality control is an activity to rise of quality is expected, through feedback on product characteristics and implementation of improvements if there are deviation. Quality control is used by companies that produce product (manufacturing) as a tool to minimize defective products so they can satisfied the quality is set by the company and satisfy consumers. However, the reality in the field is not expected and many defective products are found that are not in accordance with the standards. This study purposes to determine how the implementation of quality control uses seven tools in an effort to control defective product in the Pacific Harvest company. Droop defects has the greatest contribution in product defects to sardine production, which is a human and machine factor. The factors that caused of product defects are human, machine, material, method and environment. The results of the analysis using the control chart p there are 1 of 16 points above UCL is data 13. Then revisions and recalculated there are found 1 of 15 points above UCL is data 14. Then revisions and improvements of data are carried out until all points are within the boundary control. Problem solving using causal diagrams (fishbone diagram) to identify causes of defects and then provide solutions.

PENGENDALIAN KUALITAS PANEL KOMPOSIT AMPAS KOPI MENGGUNAKAN METODE TAGUCHI Haryanto, Rizal; Triono, Agus; Asrofi, M; Nurdiansyah, Haidzar; Trifiananto, M
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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The use of alternative materials such as composites has been widely used in small scale, medium scale and large scale production. Composites can be interpreted as a new type of engineering material consisting of a combination of two or more different types of material. Composite material will have more superior properties than its constituent material. In this study focused on improving the quality of coffee waste composite panels by increasing tensile strength and reducing the failure in panel manufacturing process. Using three parameter variations, namely washing temperature, water content and curing temperature with three levels for each parameter. This combination is replicated 4 times and confirmation experiments are carried out and processed using the taguchi method with L9 orthogonal array with the help of Minitab software. This research was conducted in the Applied Lab, Department of Mechanical Engineering, Faculty of Engineering, University of Jember to obtain data on results and data processing. The results of the study are based on the value of tensile strength. Analysis of the Taguchi method is done using Minitab software. The test results show that the water content has the highest effect on the response parameters of 40.80% at level 1 with a moisture content of 5%, and in the second parameter, the curing temperature is 27.58% at level 3 of 800C, and at the washing temperature at 24.78% at level 3 of 900C.

PENGARUH VARIASI PARAMETER WIRE-CUT EDM MITSUBISHI BA-8 TERHADAP KEKASARAN PERMUKAAN BAJA SKD 61 Putratama, Panji Hastawirata; Jatisukamto, Gaguk; Sakura, Rahma Rei; HT Prasetiyo, Dani; Zainul M, Aris
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Wire-cut EDM is a machining process used to shape precision machine components. The basic principle of wire-cut EDM is the erosion of the workpiece through spark discharges in a dielectric fluid. The spark discharge is caused by a positive electrode approaching the negatively charged workpiece, creating a short circuit that generates heat energy. Previous research was conducted with factors such as current, wire speed, on-time, and variable frequency, resulting in the best surface roughness value of 6 µm. This study aims to determine the effect of parameters such as current, voltage, and wire speed on the response of surface roughness, using the Taguchi method. The workpiece used was SKD 61 steel with 600mm x 50mm x 5mm dimensions. Cutting was done at currents of 4, 6, and 9 (Amperes), voltages of 4, 5, and 6 (Volts), and wire speeds of 8, 10, and 12 (m/m). The results of this study showed the best surface roughness value of 2.540 µm with an S/N ratio of -8.09553 at a current of 4A, voltage of 4V, and wire speed of 8m/m. After optimization, a higher S/N ratio of -8.018 was achieved. Data analysis with ANOVA showed that the effect of factors on the response yielded an F-value greater than the F-table value for all factors, indicating that all factors had a significant impact. The percentage contribution of all factors was as follows: Current at 82.46%, Voltage at 3.36%, and Wire speed at 2.53%. Keywords: wire-cut EDM, taguchi method, surface roughness.

PENGARUH VARIASI SUHU SIKLUS THERMAL TERHADAP KEKUATAN BENDING KOMPOSIT UNSATURATED POLYESTER SERAT KELAPA SEMBADA, IQBAL VARIAN; Hermawan, Yuni; listyadi S, Digdo; Sholahudin, Imam; Kristianta, FX
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Composite is one of the materials used in engineering field. This is because composites have strong properties, light weight, corrosion resistance, economical and so on. One of coconut fiber composite composite. Coco fiber in Indonesia is still not utilized to the maximum to increase its economic value. One application of coconut fiber composite usage is for wood replacement wall. This study aims to determine the effect of repeated thermal load on the bending strength of the composite. In this research the material used is coconut fiber coir random orientation direction as reinforced and unsaturated polyester as matrix with fiber volume fraction 5%. The production method used is press hand lay up. Temperature variations are 30oC, 50oC, 70oC, and 90oC with 10 repetitions. Bending test is done with ASTM D790 standard reference. The result of this research shows the highest bending strength in composite with thermal temperature of 30o C equal to 39,68 MPa. While the lowest bending strength occurred at 90°C thermal temperature of 24.60 MPa. From result of research indicate that unsaturated polyester when given heat load continuously will decrease bending strength because debonding failure in matrix.

IMPLEMENTASI METODE TOTAL PRODUCTIVE MAINTENANCE (TPM) DALAM MENENTUKAN EFEKTIFITAS STASIUN PENGGILINGAN TEBU Ghaffar, Jakfat Maulid; Arbiantara, Hari; Mulyadi, Santoso; Sanata, Andi; Djumhariyanto, Dwi
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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The milling station is a station where sugar cane-based sugar is produced, readiness is needed especially from the point of view of equipment maintenance in order to support the production process. Total Productive Maintenance (TPM) is one method of maintenance approach with Overall Equipment Effectiveness (OEE) is one of the measuring tools in calculating the effectiveness of equipment. Failure Mode and Effect Analysis (FMEA) is one method in analyzing the cause and effect of each device so that later it is hoped that this research can determine the value of the effectiveness of the equipment and provide recommendations for improvements. The calculation of the effectiveness of the equipment at the milling station that the effectiveness values from 2013 to 2017 are 75.87%, 84.17%, 87.58%, 61.53% and 92.59%. In 2013, 2014 and 2016 showed that the value of effectiveness is still below the standards of world class effectiveness values. Factors that influence the effectiveness of 2013 to 2017 are Reduce Speed Losses and Set-up adjustments time. Improvement of recommendations according to the TPM pillar in increasing productivity is 5S (Seiri, Seiso, Seiton, Seiketsu, and Setsuke). Keyword: Total Productive Maintenance (TPM), Overall Equipment Effectiveness (OEE), Failure Mode and Effect Analysis (FMEA).

SIMULASI NUMERIK HAMBATAN DAN POLA ALIRAN BARGE MENGGUNAKAN METODE CFD Prameswari, Grandys; Puspita, Hery Indria Dwi; Sakinah, Wazirotus; ., Rudianto; Arianto, Pratama Yuli
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Barge is a ship that does not have a propulsion and must be towed by a tugboat to sail Therefore, the barge is pulled by a tugboat to sail. This causes the stern area of the barge to be installed with a skeg to support the ship's performance while sailing. One of the performance parameters is the resistance and flow pattern of the barge. Previous research recommended a straight longitudinal skeg at the stern of the barge. This paper continues the recommendation by applying a numerical simulation using the Computational Fluid Dynamics (CFD) method to predict the resistance and flow pattern of the barge due to the skeg used. The CFD method was chosen because of being able to provide accurate, fast, and optimal results. By knowing the resistance and flow pattern values, the results of this study can be used to calculate the amount of bollard pull required by the barge to be towed by the tugboat. The results obtained in this study are the highest resistance at 7 knots of 269.952 kN and the lowest resistance occurs at 4 knots of 89.206 kN. The flow pattern formed in the barge area can be concluded that turbulence mostly occurs in the stern area of the ship due to the interaction of wake, water flow and skeg position. Keywords: Barge, Skeg, Resistance, Flow Pattern

PENGARUH VARIASI BARREL TEMPERATURE, INJECTION PRESSURE DAN COOLING TIME TERHADAP CACAT WARPAGE PADA PROSES INJECTION MOLDING (AL-PP) Saputra, Dheo Ardi Nugraha; Sutjahjono, Hary; Yudistiro, Danang; Rozy H, M Fahrur; Noor HS, Skriptyan
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Plastic is a polymer that has unique and extraordinary characteristic properties. With a binder (plastic) can be combined with metal elements, namely aluminum. Aluminum is chosen as an alloy material because it has good strength and tenacity. Metal alloy plastic can be processed by a method called injection molding. Injection molding is a process used in making plastic products. This research was conducted with barrel temperature, injection pressure and cooling time process variables. While the response variable is warpage defects. This study aims to determine the effect of variations in process parameters is barrel temperature, injection pressure, cooling time on warpage defects in injection molding products with Al-PP alloy material, and find out the optimum variation of parameters in the injection molding process. The results showed that barrel temperature had an effect of 91.62% on the value of warpage defect response, this condition can be observed as the level barrel temperature increases, the value of warpage defects also increases. The effect of 6.43% injection pressure on the value of warpage defects due to an increase in each injection pressure level will reduce the chance of warpage defects. The effect of cooling time parameters is 1.78% on the value of warpage defects, which means that the longer the cooling time, the greater the response or warpage produced. The optimum variation of parameters in the injection molding process in the ASTM A370 test specimen in barrel temperature parameters at level 1 is 150 oC, the injection pressure parameter at level 3 is 11 bar and the cooling time parameter at level 1 is 15 seconds.

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Jawa timur

INDONESIA