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Hetty Ondang
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jurnalbluefinfisheries2019@gmail.com
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jurnalbluefinfisheries2019@gmail.com
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Politeknik Kelautan dan Perikanan Bitung Jl. Tandurusa Kotak Pos 12BTG/Bitung Sulawesi Utara 95526
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Jurnal Bluefin Fisheries
Published by Politeknik Kelautan dan Perikanan Bitung
ISSN : -     EISSN : 26862255     DOI : http://dx.doi.org/10.15578/jbf
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Engineering Mechanical Engineering
JURNAL BLUEFIN FISHERIES merupakan publikasi ilmiah di bidang ilmu terapan kelautan dan perikanan. Artikel ilmiah yang disajikan merupakan hasil penelitian orisinil di bidang ilmu terapan kelautan dan perikanan yang belum pernah dipublikasikan. Yang dimaksud dengan perkembangan ilmu pengetahuan dan teknologi bidang Kelautan dan Perikanan di Indonesia antara lain: Teknik Penangkapan Ikan, Mekanisasi Perikanan, Teknik Pengolahan Produk Perikanan.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Vol 3, No 2 (2021)" : 5 Documents clear
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (386.352 KB) | DOI: 10.15578/jbf.v3i2.114

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (347.452 KB) | DOI: 10.15578/jbf.v3i2.109

Abstract

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
DESAIN DAN OPTIMISASI STAND ALONE PV PANEL SYSTEM UNTUK BUDIDAYA UDANG VANNAMEI PADA KOLAM BUNDAR DI KABUPATEN LOMBOK UTARA Birham Hermansyah; Aryani Rahmawati; Barokah Barokah
JURNAL BLUEFIN FISHERIES Vol 3, No 2 (2021)
Publisher : Politeknik Kelautan dan Perikanan Bitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (233.72 KB) | DOI: 10.15578/jbf.v3i2.111

Abstract

Cultivating vannamei shrimp using round ponds is an alternative way of cultivation to minimize the significant investment costs. One of the obstacles in vannamei shrimp cultivation is the availability of Dissolve Oxygen (DO) in water. By utilizing solar energy which is converted into electrical energy, DO levels can be maintained with an aeration system that utilizes solar energy. North Lombok Regency has the potential for solar energy which reaches 4.91 kWh / m2 / day with a minimum clearness index of 0.446 which is very potential to be utilized. The purpose of this research is to find the optimal design for a stand alone panel PV system to serve the electrical energy needs of vannamei shrimp farming in round ponds. The method used is to calculate the most optimal design with HOMER (Hybrid Optimization Model for Electric Renewables) software to be able to serve the average energy requirement of 38.2 kWh / day. From the analysis, it was found that the most optimal designs were the PV panel brand A 16.8 kW, the PV panel brand B 1 kW and the 200 Ah battery with a total of 104 units. Keywords : cultivation, energy, optimization, pv panel, shrimp
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (150.376 KB) | DOI: 10.15578/jbf.v3i2.112

Abstract

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.
KOMPOSISI HASIL TANGKAPAN RARAPE (BOTTOM GILLNET) DI DESA KULU KECAMATAN LIPKUPANG, KABUPATEN MINAHASA UTARA Heru Santoso; Jul Manohas; Mohammad Zaini; Yuli Purwanto; Johnny H. Tumiwa; Jerry D. Kalesaran
JURNAL BLUEFIN FISHERIES Vol 3, No 2 (2021)
Publisher : Politeknik Kelautan dan Perikanan Bitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (167.481 KB) | DOI: 10.15578/jbf.v3i2.113

Abstract

The aim of this research was to determine the species composition (Kj) and the weight composition (Kb) of the catch using a bottom gillnet whom operated by fishermen the village of Kulu. The research was conducted from October to December 2020. The research method was experimental fishing using gillnets with a 3 inch mesh size. The fishing operation took place over 15 trips and the fishing area was around the waters of the village of Kulu. The results showed that the catch was 117 fish including 15 kinds of fish and one type crustacean. The composition based on the dominant fish species is Naso hexacanthus (29.06%), whereas the composition based on the dominant weight is Portunus pelagicus (33.6%). Keywords : bottom gillnet, composition, kulu village

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