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INDONESIA
Journal Mechanical Engineering
Published by Politeknik Negeri Ambon
ISSN : -     EISSN : 29884977     DOI : https://doi.org/10.31959
Core Subject : Engineering,
Industrial & Manufacturing Engineering Mechanical Engineering
Manufaktur, Perawatan, Otomotif, Teknik Produksi Migas dan Teknologi Rekayasa Sistem Mekanikal Migas
Arjuna Subject : Teknik (semua kategori) - Mekanik Material
Articles 108 Documents
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ANALISIS PENGARUH VARIASI ARUS PENGELASAN TERHADAP KEKUATAN TARIK DAN STRUKTUR MIKRO PADA SAMBUNGAN LAS SMAW DAN FCAW DENGAN MATERIAL BAJA KARBON RENDAH Picanussa, Jovancko. S. S.; Nanulaitta, Nevada. JM; Huka, Graciadiana I
Journal Mechanical Engineering Vol. 2 No. 3 (2024): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i3.2889

Abstract

Carbon steel is a type of alloy steel consisting of various elements, especially iron (Fe) and carbon (C). In general, the properties of steel are influenced by the percentage of carbon and the microstructure of the steel which is influenced by the composition of the steel and heat treatment. The welding process can change the structure and composition of the steel. In this study, the welding process used is SMAW and FCAW welding. Then the testing process is carried out, namely tensile testing and microstructure to see the effect of variations in the welding current used. In this study, the author will analyze the effect of variations in welding current on tensile strength or mechanical properties as well as the structure and composition of the specimen to be tested in this case medium carbon steel. The welding methods used are FCAW (Flux Core Arc Welding) and SMAW (Shield Metal Arc Welding). The results of this study, the author found that the welding current has an effect on the tensile strength and microstructure of medium carbon steel. Where for tensile strength, the greater the welding current used, the greater the tensile strength of the specimen where the current range used must be adjusted to the thickness of the workpiece used. In FCAW 90A the value obtained is 438.30 MPa and the strain value is 6.20% and SMAW 90A the value obtained is 438.20 MPa and the strain is 7.20%. Likewise, the Pmax and ΔL values where in SMAW 90 ampere the Pmax value is 43.82 KN and ΔL 3.60mm, FCAW 90 ampere the Pmax value is 43.83 KN and ΔL 3.10mm. With this, the author concludes that with a material thickness of 8mm and a current variation of 70 amperes and 90 amperes, it was found that at a larger welding current of 90 amperes, the tensile strength obtained was greater and for the microstructure, the author found changes in the structure of the welding results in FCAW welding where in the raw material the structure found was ferrite and pearlite while for the FCAW welding results, a beanite structure was found. Keywords: Welding, tensile strength, microstructure.
ANALISA PENGARUH VARIASI PUTARAN DAN FEED RATE PADA MESIN FRAIS TERHADAP KEKASARAN PERMUKAAN DAN LAJU KOROSI PADA BAJA KARBON SEDANG Latuconsina, Muhammad Jen; Nanulaitta, Nevada. J. M.; Matheus, Josef
Journal Mechanical Engineering Vol. 2 No. 3 (2024): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i3.2890

Abstract

A milling machine or milling machine is a machine tool used in the manufacturing process to produce components or parts with the desired shape and size. Milling machines have an important role in the oil and gas industry, especially in the manufacture of components used in oil and gas industry equipment such as grooves on shafts and gears used in drilling equipment and oil and gas production are often made of medium carbon steel because of its strength and durability. This study aims to obtain roughness values and corrosion rates on medium carbon steel through the milling process with variations in rotation of 900 rpm and 1100 rpm and feed rates of 42 mm / min and 76 mm / min with dromus cooling media. The results of this study obtained the highest average roughness value at a rotation speed of 900 rpm and a feed rate of 42 mm/minute, which is 6.64 µm (Ra) and 31.1 µm (Rz), while the lowest average roughness value at a rotation speed of 1100 rpm and a feed rate of 42 mm/minute is 6.23 µm (Ra) and 30.8 µm (Rz), for a rotation speed of 1100 rpm and a feed rate of 76 mm/minute is 7.92 µm (Ra) and 37.1 µm (Rz). The higher the rotation speed and the lower the feed rate, the lower the roughness value, and vice versa. The highest corrosion rate is at 900 rpm and 76 mm/minute feed rate, which is 0.02194 (mm/y), while the lowest corrosion rate is at 1100 rpm and 42 mm/minute feed rate, which is 0.01555 (mm/y). The higher the surface roughness, the faster the corrosion rate, and vice versa. Keyword : milling machine, surface roughness, corrosion rate, medium carbon steel
Theoretical Design of Offgrid Renewable Energy System Pv For Centrifugal Pump Electricity Supply Umayyah, Nissaeryn Zahro; Hatuwe, Azmain Noor; Lilipaly, Eka R. M. A. P.
Journal Mechanical Engineering Vol. 2 No. 3 (2024): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i3.2892

Abstract

ABSTRACTThe off-grid PV system is an alternative power generator as a replacement for the conventional system which is currently still used in production operations at petroleum companies in Indonesia. The application of this offgrid PV system can support oil production operations for companies whose production areas are in remote areas or are still not reached by the PLN network and can reduce the consumption of fossil fuels to run generators so as to reduce greenhouse gas emissions and as a step to utilize the potential of Indonesia's sunlight. This research was carried out using a theoretical study method, namely by processing data obtained from the field using equations obtained from supporting references. This research shows that to meet the electricity needs of a centrifugal pump that operates 5 times a day with one operation of 7.5 kW for 1 hour and the total daily need is multiplied by 2 to calculate cloudy days, 75 kwh of energy is needed a day. The results of the research show that 40 solar panels with a capacity of 450 Wp each installed in series are needed and 80 LIFEP04 batteries made in battery banks totaling 20 banks with 4 batteries each, and 4 5000W inverters so that they can produce 75kWh of power and meet daily load requirements. Key words: offgrid PV system, Centrifugal Pump, parallel series
ANALISIS PENGENDALIAN LAJU KOROSI DAN SISA UMUR PAKAI PIPA PENYALUR SOLAR DI PLTD HARUKU, DESA PELAUW Husen, Fahmi; Karyani, M. Said; Pellu, Deny Ismail
Journal Mechanical Engineering Vol. 2 No. 3 (2024): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i3.2894

Abstract

The impact of the corrosion rate of diesel fuel pipes in PLTD HARUKU, DESA PELAUW. This study aims to see how much influence corrosion control has on the corrosion rate and remaining service life studied using an Ultrasonic Thickness Gauge. Measurements were carried out directly with an Ultrasonic Thickness Gauge. The measurement results showed that the highest corrosion rate was 0.0975 mmpy and the lowest was 0.0189. The remaining life of each pipe is determined by a formula that has been adjusted by the standard, with a higher corrosion rate causing a shorter pipe life, in the diesel fuel pipe the highest remaining service life of the IPA is 149 years due to the small corrosion rate while the pipe with the lowest service life is 25 years due to the high corrosion rate. Based on this analysis, the pipe is still feasible to operate. In conclusion, although there are variations in the corrosion rate, and the remaining service life of the pipe can still be operated safely. Keywords: Corrosion control, Corrosion, ultrasonic thickness gauge
Kajian Teoritis Pembuatan Instalasi Elektrohidrolik Menggunakan Metode Cascade pada Mesin Kupas Serabut Kelapa Hatuwe, Azmain Noor
Journal Mechanical Engineering Vol. 2 No. 3 (2024): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i3.2895

Abstract

The Department of Mechanical Engineering, Ambon State Polytechnic has made a machine for peeling coconut fiber. This machine has 4 pry blades which function, when stuck in the coconut fiber, they will make opposite movements, so they can tear the coconut fiber. In the operating process, this machine still uses human power, of course human power has limitations when peeling coconut fiber on a large scale. Therefore, the coconut peeling machine needs to be driven automatically using hydraulic power so that the work process does not depend on human power. The method used in this research is a theoretical study, where data obtained from the field is processed using references and devices that support the construction of electrohydraulic installations. Fluidsim software is needed to test the movement of electrohydraulic installations according to short notation A+ B+ B- A-. The working mechanism of an electrohydraulic installation in controlling the movement of a hydraulic cylinder is shown step by step in the form of a hydraulic diagram and an electro diagram.From the test results, information was obtained that the coconut peeling machine uses 2 cylinders as the driving force for the mechanical system of coconut fiber peeling knives. Working principle of electrohydraulic installation according to the cascade method, in the signal control installation section; relays k1 and k2 turn on alternately in sequence, and in the power control installation section, the relay switch will turn on the solenoids y1, y2, y3 and y4 sequentially according to the short notation. Keywords: Electrohydraulics, Cascade Method, Coconut Fiber Peeling Machine
ANALISIS KETEBALAN PELAT DAN PENENTUAN SISA UMUR PAKAI PADA TANGKI 2 DI PLTMG AMBON PEAKER Mahubessy, Nurul Fadhila; Effendy, Edison; Lilipaly, Eka R. M. A. P.
Journal Mechanical Engineering Vol. 2 No. 3 (2024): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i3.2896

Abstract

ABSTRACTThe Ambon Peaker Gas Power Plant (PLTMG Ambon Peaker) is an electrical infrastructure facility powered by gas turbines, located in Waai Village, Central Maluku Regency, Maluku Province. The fuel oil storage tank used by the Ambon Peaker since 2019 is situated directly near the coastline, making it very vulnerable to damage, particularly from corrosion on its metal plate walls. Therefore, maintenance is necessary to prevent any unwanted workplace accidents. This tank stores fuel oil. The author conducted calculations for minimum thickness and corrosion rate to determine the remaining lifespan of the tank. The results indicate that the critical point is located at course 1, with a remaining lifespan of 121 years. This can be influenced by various factors, such as environmental conditions and fluid characteristics. Tank maintenance also needs to be considered to ensure the tank's reliability, allowing it to operate longer and preventing the need for corrective maintenance. Keywords: storage tank, corrosion rate, wall thickness, remaining life.
ANALISIS CORROSION RATE TERHADAP REMAINING LIFE STORAGE TANK T03-300 KL DI PLTD POKA DENGAN MENGGUNAKAN METODE RISK BASED INSPECTION (RBI) Fazrian, Rian; Pattikayhattu, Erwin B.; Patty, Alexander A.
Journal Mechanical Engineering Vol. 2 No. 3 (2024): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i3.2897

Abstract

AbstractThis study is entitled "Corrosion Rate Analysis of Remaining Life Storage Tank T03-300 KL at PLTD Poka Using the Risk Based Inspection (RBI) Method". The purpose of this study is to evaluate the corrosion rate and residual life of the T03-300 KL storage tank used at PLTD Poka, as well as to provide recommendations related to appropriate inspection strategies based on risk analysis. The method used in this study is Risk Based Inspection (RBI), which allows the determination of the probability of failure (PoF) and the consequences of failure (CoF) of the storage tank. The data collected includes primary data through observation, measurement, and direct inspection of tanks, as well as secondary data from relevant literature.Keyword : Corrosion Rate, Remaining Life, Storage Tank Risk Based Inspection (RBI), Probability of Failure (PoF), Consequence of Failure (CoF)
ANALISA REMAINING LIFE DAILY STORAGE TANK DI PLTMG SERAM PEAKER 20 MW MASOHI – MALUKU TENGAH Kelian, Nur Aisyah Utami; Patikayhattu, Erwin; Nanulaitta, Nevada. J. M.; Leatemia, Meiti
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2911

Abstract

Increased global energy demand has resulted in rapid growth in the oil and gas industry, including in Indonesia. Storage tanks play an important role in the storage of large quantities of liquids and must comply with strict technical standards and government regulations, such as American Petroleum Institute (API) 650, 653, and 575 and Permen of ESDM No. 32 of 2021. Seram Peaker 20 MW Masohi-Maluku Tengah MHP, as a vital asset for providing electrical energy, has a fuel storage tank that has never been inspected since the beginning of its operation. Non-compliance with API 653 standards potentially poses a risk of structural damage, leakage, and disruption to fuel supply. This research identifies the importance of periodic structural integrity evaluation using an Ultrasonic Thickness Gauge GM 100 to measure the decrease in plate thickness due to corrosion and predict the remaining service life of the tank. The results of the calculation show that each course starting from course 1-5 is 109.4 years, 72.3 years, 56.9 years, 43.6 years, 38 years, this shows that the Daily Storage Tank PLTMG Seram Peaker 20 MW Masohi-Central Maluku can operate for the next 38 years. Keywords : Storage Tank, Remaining Life, Inspections, UTG, Corrosion Rate
PERANCANGAN TEORITIS PLTS TERPUSAT SEBAGAI ALTERNATIF SUPLAI LISTRIK KEBUTUHAN SUCKER ROD PUMP Kartikasari, Pinky; Hatuwe, Azmain Noor; Lilipaly, Eka R. M. A. P.
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2912

Abstract

Design of PLTS is an effort to enhance the reliability of electrical power, electrification ratio, and utilization of renewable energy in the oil and gas industry. The availability of electricity is extremely urgent to meet the production process requirements, particularly for the motor-driven SRP pumping system. Currently, the industry relies on PLN and genset electricity for daily production activities. However, the design of a centralized PLTS system is expected to meet the SRP electricity needs in the oil and gas industry. The power grid in the oil and gas industry is obtained from PLN and genset. Therefore, the need for a power plant is evident. Related to the research previously discussed with the title “Design of Centralized PLTS as an Alternative Electricity Supply for Sucker Rod Pump” (Pinky Kartikasari, 2024), this study aims to determine the capacity of panels and batteries required for the development of a centralized PLTS in the oil and gas industry. The method used in this research is quantitative because it involves calculating the capacity of solar panels, daily energy needs, and numerical system analysis. The results show that the total energy requirement for SRP electricity supply is 264 kWh/day. The required capacity of panels is 106 kWp, with a total of 200 monocrystalline panels each with a capacity of 550 Wp. Additionally, there are 128 batteries with a capacity of 24V 200Ah. The inverter used is the PV1800 ECO Series 6.200W type, with 20 units in total. Keywords: PLTS (Solar Power Plant), SRP (Sucker Rod Pump), Oil and Gas Industry
ANALISA KINERJA NATURAL DRAFT COOLING TOWER DI PPSDM MIGAS CEPU Putirulan, Tesya; Waas, Kristofol; Loppies, Leslie S; Lopuhaa, Agustinus Oktovianus
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2914

Abstract

Human resource development center (PPSDM) a series of production processes such as boiler, power plants, coal testing sites, water treatment, fire and safety, pumps, welding workshops, distribution sites and refinery units, one of which is the cooling tower. The cooling tower is part of the power generation system that has a function as a heat exchanger between hot water coming out of the condenser and air so that the water has a lower temperature and can be reused in the condesation proses. The reseach on natural draf cooling tower in PPSDM migas aims to find parameters that affect the performance of natural draf cooling tower such as efficiency, make up water and also the heat transfer capacity of the cooling tower unit. In this writing, researchers use direct research methods in the field to find out the phenomena that occur in the colling Tower. While the performance of the natural draft cooling tower is calculated using the calculation method. The research results show an actual of 82,61 %, the recorded cooling capacity is 2417,941 kJ/s and the make up water value is 24.03 %Keywords: Cooling tower, Range, Approach, Effectiveness, Cooling Capacity, Make-Up Water.

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