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Nevada J.M,Nanulaitta
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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 20 Documents
 1   2 
Search results for , issue "Vol. 2 No. 1 (2024): April" : 20 Documents clear
ANALISA PENGARUH VARIASI KUAT ARUS PENGELASAN FLUX CORED ARC WELDING (FCAW) TERHADAP SIFAT KEKERASAN PADA DAERAH HAZ BAJA KARBON RENDAH Graciadiana. I. Huka; Josef Matheus; Nevada JM. Nanulaitta; Erwin Bravor Pattikayhatu
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2579

Abstract

Welding is a process of joining metals by utilizing electric power as a source of welding heat. Flux-Core Arc Welding (FCAW) is a welding process that uses a heat source from electricity that is converted into a heat source in an electric arc, in this FCAW welding the type of protection used is flux or powder that is in the core of the welding wire (the welding wire is rolled in a roll). This research aims to observe changes in hardness values after welding, both low carbon steel hardness in the HAZ (Heat Affected Zone) area and outside the HAZ (Heat Affected Zone) area. Welding using V-joints with angles of 45° and 60° and varying the voltage strength at 16 volts, 18 volts and 20 volts. Hardness testing using the Rockwell method where the highest hardness value of the HAZ area for 45 is 22.95 HRD at a voltage strength of 20 volts. For V-joints for an angle of 60°, the highest hardness value of the HAZ area is also at a voltage strength of 20 volts with a value of 24.10 HRD. The highest increase in hardness value is at the V-angle 60° joint with a voltage of 20 volts with a hardness value of 21 HRD while the lowest is the V-angle 45° joint with a voltage of 16 volts at 18.67 HRD. Keywords: Hardness Value, HAZ (Heat Affected Zone), FCAW (Flux Cored Arc Welding)
ANALISIA PENENTUAN UMUR PAKAI TANGKI TIMBUN 01-50 TON DI PT.PLN (PERSERO) UIW MALUKU DAN MALUKU UTARA KANTOR PELAYANAN KIANDARAT Gahsar Rumaday; Leslie. S. Loppies; Nevada J. M. Nanulaitta
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2580

Abstract

In the oil and gas industry, tanks play a crucial role as storage containers for fluids and fuel oil products, both in the form of volatile, pressurized, and flammable fluids. In addition, tanks are not only found in the oil and gas industry, but also in other sectors such as power plants. In the long period of use, the tank may be damaged due to several factors, including plate depletion caused by cor rosion. This problem can affect the integrity of the tank so that an inspection of the condition of the tank needs to be carried out. The inspection of tank plate thickness and corrosion rate was carried out using the Non-Destructive Examination (NDE) method with the Benetech GM100 Ultrasonic Thickness Gaugge tool. This inspection is urgently needed to determine the remaining life of the tank with reference to the API 653 and API 575 standards. The method used started from literature studies in various references and previous research, after which field data collection was then analyzed in accordance with the findings and applicable provisions. Based on the results of measurements in April 2024, the condition of the 01-50 ton tank is still in good condition, marked by the thickness of course 1-3 is still above the minimum limit that has been determined. For Course 1 Tact is 4.3 mm and Tmin is 0.4064 mm with a corrosion rate of 0.0875 mm/year and a remaining life of 44.49 years. For Course 2 Tact is 4.1 mm and Tmin is 0.2032 mm with a corrosion rate of 0.1125 mm/year and a remaining life of 24.63 years. For Course 3 Tact of 3.9 mm and Tmin of 0.1016 mm with a corrosion rate of 0.1375 mm/year and a remaining life of 28.35 years. It can be concluded that the condition of the 01-50 Ton tank is still in good condition. Keywords: (tank, power plant, plate thickness, corrosion rate, remaining tank life)
ANALISIS PERBANDINGAN HASIL PEMBUATAN VIRGIN COCONUT OIL (VCO) MENGGUNAKAN PENAMBAHAN RAGI DAN TANPA PENAMBAHAN RAGI Muhammad Said Karyani
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2581

Abstract

A comparative analysis of the results of making VCO using the addition of yeast and without using the addition of yeast has been carried out. The method used is a simple experiment, namely measuring the volume of VCO produced and the quality of the product produced (taste, smell, color) with the control variable being the length of fermentation, 1 hour, 3 hours, 5 hours, 7 hours, 9 hours and 11 hours using yeast. fermipan as much as 0.1% and without using yeast. The results show that there is a difference in the growth rate of VCO formation with the addition of yeast and without the addition of yeast. The growth rate of VCO formation using yeast begins to occur during fermentation from the first 1 hour to the next 3 hours, namely the VCO produced starts from 26 mL to 92 mL, after that time interval, in the next 2 hours the growth rate of VCO formation begins to decrease. Meanwhile, the growth of VCO formation without yeast during fermentation since the first 1 hour interval has not occurred significantly, namely only 7 ml of VCO produced. This and the growth of VCO formation only started to increase after 3 hours and then reached 22 ml. Testing the organoleptic properties of the VCO produced, there was no significant difference between the VCO produced with the addition of yeast and without the addition of yeast. Keywords: Virgin Coconut Oil, VCO, Fermentation, Growth Rate, Yeast
PENGARUH VARIASI METODE DRYING PROSES TERHADAP KEKERASAN PENGECATAN BODY KENDARAAN BERMOTOR F. Demmatacco; Hermon. Latumaerissa; J.M Nanulaita
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2582

Abstract

Coating is a process of applying paint in liquid form to an object, to create a thin layer which then forms a hard layer or paint layer. Factors that affect the quality of painting are the materials used, the viscosity of the paint, the painting temperature, and the skill in applying the paint. This study is to observe the process of changing the hardness value on the surface of the paint from coating. The drying process of painting uses 4 forms, namely drying indoors, outdoors, in an oven at a temperature of 50°C and 60°C with a mixture of paint, 100% base: 50% hardener + Thinner (10% of the base) Based on the study of the effect of the paint drying process on the hardness value of the coating, it can be concluded that the results of the average hardness value obtained, namely the use of the drying method using an oven with a temperature of 60°C has the highest hardness value of 84.10 HV followed by 82.90 HV and 81.93 HV for oven drying with a temperature of 50°C and drying indoors with a temperature of 35°C - 36°C, while the lowest hardness value is in outdoor drying with a temperature of 37°C - 39°C with a value of 80.68 HV. Keywords: Hardness Value, Coating, Temperature.
PENGARUH PENCAMPURAN RUMPUT LAUT DENGAN POLIMER XANTHAN GUM TERHADAP VISKOSITAS DAN ADSORPSI Valentyn Paul Bodywein Hattu; Deny Ismail Pellu
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2583

Abstract

Polymer injection is an EOR method using a polymer solution to increase oil recovery by decreasing the oil-water mobility ratio by increasing the viscosity of the injection water. The purpose of this study was to analyze the effect of adding seaweed to xanthan gum polymer at various concentrations. The influence that is analyzed in this study is the viscosity test and the adsorption of the solution. From the research that has been carried out, it can be concluded that the best polymer viscosity is a polymer mixture of xanthan gum and seaweed, while based on the adsorption test, xanthan gum polymer is the best.. Keywords: Polymer Flooding, EOR, Viscosity, Adsorption
ANALISIS PERUBAHAN KETEBALAN PIPA AKIBAT PENGARUH KOROSI DAN SISA UMUR PAKAI PIPA DI PLTD NAMLEA KABUPATEN BURU Pratama, Ahmad Zulfikri; Pattikayhattu, Erwin B.; Effendy, Edison
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

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Abstract

In modern industry, pipelines play an important role, especially in the oil and gas sector. Pipes are susceptible to corrosion, especially those in aggressive environments such as PLTD Namlea, which is directly adjacent to the coast. Corrosion, as a natural process of metal degradation, is inevitable, but it can be controlled to extend the life of the pipe. This study measured the thickness of the pipes at PLTD Namlea using Ultrasonic Testing (UT) to determine the corrosion rate and remaining service life. Based on measurements, the minimum thickness of pipes at various measuring points (Measuring Points / MP) still meets the API 574 standard, which must not be less than 1.8 mm. The average corrosion rate ranges from 0.336 to 0.358 mm/year. These values affect the rate of degradation of the pipe and the remaining service life, which ranges from 5.5 to 6.1 years at various measurement points. Pipes that have a higher corrosion rate will have a shorter remaining service life. Overall, the pipeline at PLTD Namlea is still laid. Keywords: Pipe, Corrosion Rate, Remaining Life
ANALISA VARIASI KAMPUH DAN ARUS LISTRIK LAS PADA MATERIAL BAJA KARBON MENENGAH TERHADAP KEKUATAN TARIK DAN STRUKTUR MIKRO SAMBUNGAN LAS Lasamahu, Stevanno B D; Huka, Graciadiana I; Nanulaitta, Nevada. JM
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

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Abstract

This study aimed to investigate the effects of weld groove variations and welding current on the tensile strength and microstructure of medium carbon steel joints using FCAW (Flux-Cored Arc Welding). The researcher employed a quantitative approach with an experimental method. The specimens used in this research include FCAW with V-groove and 90 A current, FCAW with V-groove and 70 A current, FCAW with X-groove and 70 A current, FCAW with X-groove and 90 A current, raw material specimens, and microstructure specimens. The data analysis reveals that the highest average tensile stress value among the welded specimens was 463.50 MPa, observed in the FCAW X-groove with 90 A current specimen, while the FCAW V-groove with 70 A current specimen showed the lowest value at 295.1 MPa. Regarding the strain values, the FCAW X-groove with 90 A current specimen had the lowest average strain of 4.15%, whereas the FCAW V-groove with 70 A current specimen had the highest at 5.36%. In terms of microstructure, the FCAW V-groove with 70 A current specimen exhibited martensite, pearlite, and ferrite structures in the weld zone, and ferrite and pearlite structures in the heat-affected zone (HAZ) and base metal. For the FCAW X-groove with 90 A current specimen, pearlite and ferrite structures were found in the weld zone, HAZ, and base metal. Keywords: Carbon Steel, Weld Groove, Welding Current, Tensile Test, Microstructure
OPTIMASI HYDRULIC PUMP UNIT (HPU) UNTUK MENINGKATKAN LAJU PRODUKSI PADA SUMUR AGL LAPANGAN X Nikijuluw, Albert K J Vig; Sriani , Tun; Lekatompessy, Roy R.
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

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Abstract

Optimizing Hydraulic Pump Units (HPUs) is a crucial step in increasing oil production rates at the AGL well in field X. HPUs are used to lift crude oil from production wells to the surface using hydraulic pressure. This research focuses on analyzing and improving various operational aspects of HPUs to address challenges such as hydraulic leaks, component wear, and control system failures. The methods employed include preventive maintenance, the application of advanced technology for real-time monitoring, and the adjustment of operational parameters to find the optimal configuration. The study results show that with proper optimization, production rates can be significantly increased, downtime can be reduced, and equipment lifespan can be extended. Continuous monitoring and performance evaluation of HPUs after implementing optimization also provide valuable insights for further improvements. This research is expected to offer practical guidance for the oil and gas industry in implementing HPU optimization to achieve more efficient and productive operations. Keyword : pump, oil and gas, production flow rate, hydraulic pressure, AGL filed well X
ANALISIS KETEBALAN DAN SISA UMUR PAKAI PADA PIPA PENYALUR AIR RADIATOR MENUJU KE ENGINE DI PLTMG AMBON PEAKER 30 MW Away, Hyzkia; Effendy, Edison; Lilipaly, Eka R.A.P.
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

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Abstract

Ambon Peaker 30 MW. These pipes are prone to corrosion, especially if not protected by a coating, which leads to thickness reduction and shortens the operational lifespan of the pipes. The thickness measurement will be carried out using an Ultrasonic thickness gauge to determine the corrosion rate and the remaining life of the pipe. The standards referenced in data collection are the American Petroleum Institute (API) 570 and the American Society of Mechanical Engineers (ASME) B31.4. The research will be conducted by the author from August 28, 2024, to August 30, 2024, at PLTMG Ambon Peaker 30 MW, Salahutu District, Central Maluku Regency, Maluku Province. The research results show that the minimum thickness reduction indicates a corrosion rate of 0.228 mm/year at Thickness Measurement Location (TML) 17 and 18, while the maximum thickness reduction shows a corrosion rate of 0.564 mm/year at Thickness Measurement Location (TML) 3. Pipes with lower corrosion rates have a remaining life of 5.4 years, while pipes with higher corrosion rates have a remaining life of up to 31.9 years. In conclusion, coating protection is essential to reduce the corrosion rate and extend the service life of the pipes. Keywords: Pipe thickness, Corrosion rate, Pipe remaining life, Ultrasonic thickness gauge.
Evaluasi Kinerja Pompa Sentrifugal NO. 3 Pada RPKS II Di PPSDM Migas Cepu Salmon, Maurenzia; Pattykayhattu, Erwin. B.; Pattiasina, Nanse. Henny.
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

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Abstract

The research objectives are to identify the performance efficiency of Centrifugal Pump No. 3, determine the headloss value, and compare the available NPSH with the required one. The method used is quantitative with an experimental approach to collect pump performance data. The results showed that the pump performance efficiency was 9.9%, headloss was 0.003521 m, total pump head = 9.19 m, hydraulic power = 0.49 kW, pump power = 5.1 kW, available NPSH was 9.92 and the required NPSH was 2.3 m. The application of preventive maintenance includes identifying components experiencing wear and tear, periodic maintenance of suction and discharge piping, routine purging to reduce head losses and checking the condition of the pump suction to anticipate cavitation factors. The application of preventive maintenance includes identifying components that are experiencing wear and tear, periodic maintenance of suction and discharge pipe installation, routine flushing to reduce head losses and inspection of pump suction conditions to anticipate the cavitation factor. Keywords: centrifugal pump, PPSDM, head loss, preventive maintenance

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