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All Journal IPTEK The Journal for Technology and Science Jurnal Bluefin Fisheries Jurnal Airaha Maritime Park: Journal Of Maritime Technology and Socienty Jurnal Perikanan

Pakaya, Fahriadi

Politeknik Kelautan Dan Perikanan Bitung

Author-ID : 4131051

Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

Published : 8 Documents Claim Missing Document

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Articles

Mechanical Properties and Thermal Stability of Epoxy/RTV Silicone Rubber Pakaya, Fahriadi; Ardhyananta, Hosta; Wicaksono, Sigit Tri
IPTEK The Journal for Technology and Science Vol 28, No 1 (2017)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Epoxy products have been widely applied in industries such as in the fields of automotive, mechanical, electrical, and chemical engineering. Epoxy modified to be done to improve the mechanical properties, thermal stability, physics and chemical resistance. Using of other compounds as curing agents has long been commercialized, but the constraints posed is application of an epoxy thermoset on areas requiring impact strength and thermal stability are still low. One of the modification that has been done is addition of other material as the second material to improve properties of thermoset epoxy. Preparation of research material obtained through the provision of a second material that is RTV silicone rubber. The aim of research to analyze effect of RTV silicone rubber composition (0, 5, 10, 15, 20) wt% of the mechanical properties and thermal stability of thermoset epoxy. Testing and characterization conducted on thermoset epoxy by the addition of RTV silicone rubber. In addition RTV silicone rubber: tensile strength, elongation at break and hardness has decreased, energy and impact strength increased maximum on the addition of 15% RTV silicone rubber respectively 0.294 J and 6175 J / m2. The maximum degradation of temperature increase in the addition of 15% RTV silicone rubber is 328 and 349oC respectively at 5 and 10% degradation.

Karakterisasi Sifat Mekanik Komposit Termoset Poliester Tak Jenuh Berpenguat Serat Alam Sebagai Kandidat Material Lambung Kapal Perikanan Fahriadi Pakaya; Joshua Ch. Huwae; Yurika Nantan
JURNAL BLUEFIN FISHERIES Vol 2, No 1 (2020)
Publisher : Politeknik Kelautan dan Perikanan Bitung

Peningkatan kekuatan regangan sekaligus pengurangan polusi di lingkungan laut perlu dilakukan. Peneliti menggunakan serat alam berupa serat eceng gondok sebagai pengganti serat kaca. Tujuan penelitian ini adalah untuk mengetahui seberapa besar kekuatan mekanik komposit berpenguat serat eceng gondok bermatriks Polyester unsaturated dengan perlakuan alkali pada orientasi yang telah ditetapkan dengan perbandingan komposisi serat, sehingga diperoleh komposisi terbaik. Adapun metode yang digunakan yakni melalui perendaman dalam pelarut NaOH 2%. Serat yang telah direndam kemudian di karakterisasi mikrostruktur, setelah itu dilakukan uji penyerapan air dan ketahanan terhadap kimia. Kemudian melakukan uji Tarik komposit dengan komposisi serat sebesar 0, 2, 4, 6, 8, dan 10% berat dari total massa komposit. Hasil penelitian menunjukkan bahwa terjadi penurunan penyerapan air jika dibandingkan dengan serat eceng gondok tanpa perlakuan. Pada ketahanan kimia, terjadi peningkatan ketahanan kimia baik terhadap larutan basa maupun larutan asam. Pada komposit serat alam, tegangan paling tinggi pada komposisi 4% berat sebesar 25,17 N/mm2 dan regangan paling besar pada komposisi 6% sebesar 10,45%.

PENILAIAN TINGKAT TEKNOLOGI GALANGAN KAPAL POLITEKNIK KELAUTAN DAN PERIKANAN BITUNG, SULAWESI UTARA Yuli Purwanto; Fahriadi Pakaya
JURNAL BLUEFIN FISHERIES Vol 3, No 2 (2021)
Publisher : Politeknik Kelautan dan Perikanan Bitung

Indonesian shipyards are generally dominated by shipyards classified as traditional shipyards. Marine and Fisheries Bitung of Polytechnic dockyard or also known as workshop fishing vessel training is one of the shipyards belonging to the Technical Execution Unit of the Ministry of Maritime Affairs and Fisheries. Currently, the shipyard is only used for repairing fishing vessels with a tonnage of less than 30 GT around the town of Bitung. The shipyard uses a slipway type construction or a pull dock that uses an electric winch. The large number of ship repair requests at Bitung Marine and Fisheries Polytechnic shipyard is the reason for the need to increase the capacity of the shipyard. A technology level assessment should be carried out in order to see to what extent the level of technology which includes components of humanware, technoware, infoware and orgaware meets the needs of ship repair at the shipyard. This research was carried out from June to August 2021 using the case study method and analyzed by calculating the TCC value (technological contribution coefficient) of the technological components of technoware, humanware, infoware and orgaware. The highest contribution value is the infoware component, while the technoware component has the lowest contribution. The marine fisheries Bitung Polytechnic shipyard shows that the value of technological contributions lies in the semi-modern classification. Keywords : technological level, technometric model, shipyard.

PENGARUH KOMPOSISI CU-ZN TERHADAP TINGKAT KEKERASAN DAN STRUKTUR MIKRO ALUMINIUM DIE CASTING (ADC) 12 SEBAGAI BAHAN PROPELLER Ahmad Ilham Ramadhani; Barokah Barokah; Fahriadi Pakaya; Jozua Ch. Huwae; Marinus S. Tappy; Andie Murtono; Ahmad Tubagus Tsani Risqi Aji
JURNAL BLUEFIN FISHERIES Vol 3, No 2 (2021)
Publisher : Politeknik Kelautan dan Perikanan Bitung

Propeller is one of the important components of a ship. Generally, propellers are made of aluminum which is easily damaged when hit by waves and corrosion. The development is done by adding brass (Cu-Zn) on ADC 12. The sample was successfully made with a ratio of 70% ADC 12 : 30% Cu-Zn using the casting method and then cooled at room temperature followed by die casting and sand casting processes. The sample was tested for hardness using the Rockwell method according to the ASTM E18 standard and the microstructure test on the sample. Based on the test results obtained an average hardness level of 72.6 HRC and the formation of Al-Si-Mg, α-Al, Cu, Zn in the sample which shows the distribution of non-ferrous material in ADC-12. Keywords : ADC 12; Cu-Zn; propeller; microstructure; hardness

EFEK KONFIGURASI BAFFLE PADA HEAT EXCHANGER TYPE SHELL AND TUBE SEBAGAI PEMANAS BAHAN BAKAR BIODIESEL B20 Josua Huwae; Barokah Barokah; Marinus Tappy; Jefta Ratela; Fahriadi Pakaya; Maful Suranto; Baihaqi Baihaqi
JURNAL BLUEFIN FISHERIES Vol 3, No 2 (2021)
Publisher : Politeknik Kelautan dan Perikanan Bitung

B20 is a fuel that is widely used for combustion systems in diesel engines, especially in Indonesia. Apart from having the advantages, biodiesel B20 also has various disadvantages that affect the performance of diesel engines such as those that have a higher flash point than diesel so that biodiesel is more difficult to burn and has a high viscosity which causes less good atomization of fuel and eventually causes deposits in combustion chamber. One or the solution to the problem is that it can be done carefully. The aim of this research is to make a Shell and Tube Heat Exchanger (STHE) by including the insulation in it to improve the heat exchange performance. The method applied in this research is an experiment by testing the performance of the heat exchanger using a cooling water jacket. Some of the equipment used is a diesel engine from the Mitsubishi Diesel Engine, Type 4d35, 4 cylinder, 75 HP. Data were collected at a constant rotation of 1500 rpm at no load. The results showed that the higher the cooling water temperature of the jacket, the higher the biodiesel temperature. With a cooling water jacket temperature of 83oC, it can heat biodiesel at 74.8oC. Keywords : B20 Fuel Oil; Diesel Engine; Heater; Heat Recovery; Jacket Cooler

Analisa Kekuatan Tarik dan Kekuatan Impact Propeller Alumunium Die Casting (ADC) 12 dengan Penambahan Cu-Zn Ahmad Ilham Ramadhani; Barokah Barokah; Fahriadi Pakaya; Jozua Ch. Huwae; Marinus S. Tappy; Andie Murtono; Ahmad Tubagus Tsani Risqi Aji
Jurnal Airaha Vol 11 No 01: June 2022
Publisher : Politeknik Kelautan dan Perikanan Sorong, Indonesia

Propeller kapal nelayan umumnya terbuat dari aluminium yang mudah mengalami kerusakan pada saat dihantam batu karang, ombak dan mengalami korosi. Maka dilakukan pengembangan dengan penambahan kuningan (Cu-Zn) terhadap material propeller ADC 12. Spesimen berhasil dibuat dengan penambahan 30% Cu-Zn pada ADC 12 dengan menggunakan metode pengecoran yang dilanjutkan pencetakan dengan metode die dan sand casting. Spesimen ADC 12 dan paduan ADC 12+CuZn diuji tarik dan impak sesuai standard ASTM E8 dan ASTM E23 untuk mengetahui perubahan sifat mekanik material tersebut. Berdasarkan hasil pengujian tarik diperoleh bahwa adanya unsur Cu-Zn menurunkan kekuatan tarik ADC 12 (141 MPa) dan paduan ADC 12+CuZn (55,1 Mpa). Hasil pengujian kekuatan impact menunjukkan tingkat kekuatan impact kekerasan rata-rata ADC 12 (15,61 joule) dan paduan ADC 12+CuZn (15,98 joule).

KONVERSI LIMBAH PELUMAS KAPAL PERIKANAN MENJADI MINYAK MURNI DAN BAHAN BAKAR DIESEL: PROSES DAN POTENSI Fahriadi Pakaya; Yurika Nantan; Jozua Ch Huwae; Mohamad Haris; Erick Renold Rakinaung; Aliffa Yusti Octikharisma
Jurnal Perikanan Unram Vol 14 No 3 (2024): JURNAL PERIKANAN
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jp.v14i3.829

Bitung city is one of the industrial, port, and tourist centers in North Sulawesi Province, with many fishing vessels passing through and docking in Bitung waters. Consequently, there is a potential for marine environmental pollution due to oil spills and the intentional or unintentional discharge of used oil into the sea. According to BPS data in 2022, there are approximately 1,100 fishing vessels operating in Bitung waters. Therefore, the daily demand for oil to meet the lubrication needs of main and auxiliary engines is increasing. This poses a significant environmental problem because fishing vessels in Bitung are generally not equipped with oil-water separators. The aim of this activity is to recycle used oil and refine it, while also converting the used oil into diesel fuel. The method used involves collecting used oil from fishing vessels, dissolving it with H2SO4 and NaOH, and separating it through a fractionation process to remove water molecules and heavy metals trapped in the long hydrocarbon chains of the oil. The results of the study indicate that this technology is effective in reducing contamination and producing products that meet standards. The addition of NaClO-NaOH-NaClO solution to kapok fiber enhances its hydrophilic properties, and the combination of H2SO4 and NaOH successfully binds impurities in the used oil. The use of activated charcoal effectively changes the color of the oil and removes contaminants. The recycled oil has a density of 0.837 g/cm³ and a specific gravity of 0.884, meeting the existing standards. The diesel fuel produced has a density of 0.801 g/cm³, approaching the industrial standard of 0.820 g/cm³. Thus, recycling used oil has the potential to be a suitable solution for addressing environmental issues while supporting the local economy

Arenga pinnata Merr. Reinforced Polyester Biocomposite as a Candidate Material for Fishing Vessel Hull: Mechanical Properties Analysis Pakaya, Fahriadi; Nantan, Yurika; Ch. Huwae, Jozua; S. Tappy , Marinus; GTH Simanjuntak, Raman; Wasum; Subawa, I Nyoman
Maritime Park: Journal of Maritime Technology and Society Volume 4, Issue 2, 2025
Publisher : Department of Ocean Engineering, Faculty of Engineering, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/mp.vi.43650

Arenga pinnata Merr (APM) has excellent strength compared to other natural fibers. However, until now its application in the industrial sector is still very low. This study is an experimental study aimed at analyzing the mechanical properties of Arenga pinnata Merr “ijuk” reinforced polyester biocomposite and its potential as a basic material for fiber ship hulls with alkalization treatment on the fiber. This research method is based on mechanical testing of several specimens with fiber content of 0, 5, 10, 15, to 20%wt soaked in 2% NaOH solvent for 3 hours, temperature 70oC. Furthermore, tensile testing of single fiber and biocomposite, bending test, hardness test, and Impact test were carried out with 5 repetitions each. The results obtained include a single fiber tensile strength of 1.1 GPa. For the highest composite tensile strength at 15%wt fiber of 61.27 MPa. The highest Elongation value at 20%wt fiber (3.19%). The highest bending strength at 0%wt fiber is 93.21 MPa. The highest hardness value at 5%wt fiber is 83.7 HD and the impact toughness value on the composite with 20%wt fiber is 1.31 J/mm2. Based on the results of the biocomposite mechanical test, if the biocomposite material is used as the basic material for making fiber ship hulls, then based on BKI standards, the mechanical strength value of the polyester-APM biocomposite does not comply with BKI standards.

Co-Authors Ahmad Ilham Ramadhani Ahmad Tubagus Tsani Risqi Aji Aliffa Yusti Octikharisma Andie Murtono Ardhyananta, Hosta Baihaqi Baihaqi Barokah Ch. Huwae, Jozua Erick Renold Rakinaung GTH Simanjuntak, Raman Haris, Mohamad Huwae, Jozua Ch I Nyoman Subawa, I Nyoman Jefta Ratela Joshua Ch. Huwae Josua Huwae Jozua Ch Huwae Jozua Ch. Huwae Maful Suranto Marinus S. Tappy Mohamad Haris Nantan, Yurika Octikharisma, Aliffa Yusti Rakinaung, Erick Renold S. Tappy , Marinus Wasum Wicaksono, Sigit Tri Yuli Purwanto

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