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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Warta Penelitian Perhubungan Archipelago Engineering Prosiding Seminar Nasional Pengabdian Kepada Masyarakat
Betty Ariani
Department Of Naval Architecture, Universitas Muhammadiyah Surabaya
Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Public Health Transportation Other

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ANALISIS NUMERIK PENGARUH KECEPATAN TERHADAP SEAKEEPING KAPAL PATROLI PADA DAERAH PELAYARAN SEASTATE 7 Mohammad Taufik Ar Rozi; Betty Ariani; Dedy Wahyudi
ALE Proceeding Vol 4 (2021): Archipelago Engineering (ALE)
Publisher : Fakultas Teknik Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ale.4.2021.13-17

Abstract

Patrol boat is designed not to be slow in its movement on the water surface. To be able to move quickly and agilely, the most important requirement for this type of ship is in its maneuverability. The ship's motion at sea (seakeeping) is influenced by several things, speed, body shape, and the direction of the ship's heading waves. In this study, we analyze the six degrees of freedom, especially on the response of the ship's vertical movement, namely rolling on the sea waves of Seastate 7, especially in extreme weather in the South China Sea. The standard limit used is NORDFORSK 1987 with Light Manual Work Criteria. By entering parameters such as variations in speed and wave angle, such as 0°, 45°, 180° and 270°, then from the graph it can be seen the critical value for each movement. The calculation is carried out with the help of computational software Maxsurf Motions Advanced 20 V8i. The results of this study are the maximum roll movement value that occurs at a speed of 14 knots with a wave angle of 45° with a roll angle value of 6.40o. Furthermore, there is a decrease in the value of the movement along with the increase in the speed of the ship. The minimum roll value occurs when the wave angle is 270° when the ship's speed is 28 knots with a value of 5.69o.
Numerical Investigation of the Effect of Biodiesel-Biogas Percentage on Performance Characters and Dual Fuel Engine Emissions as Green Technology on Ship Betty Ariani; Dedy Wahyudi
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 19, No 1 (2022): February
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v19i1.44125

Abstract

The discourse on the application of green technology in the maritime sector is an interesting agenda to implement. The development of the world of shipping transportation which continues to experience an increase in numbers and services creates new problems in terms of fuel supply and the resulting emissions. So that the development of innovation and technology for ship machinery should be directly related to fossil fuel substitution technology, operational efficiency technology, improving performance and reducing emissions from the engine itself to be achievements and targets. Good engine performance directly has an impact on increasing the operational efficiency of the ship and being a good carrying capacity in the environment with minimal emission levels. A dual-fuel engine is one of the engine system concepts that has several advantages, such as simple and relatively easy modifications and the use of natural gas which tends to be cleaner. Biodiesel and biogas are examples of alternative fuels that are expected to be promising solutions for marine engineering. This research uses a numerical study on the application of dual fuel engines, the percentage of biodiesel-biogas is carried out with variations of 50:50 and 25:75, at a constant engine speed of 2200 RPM. Simulations were carried out to see the results of how the engine performance, cylinder pressure, heat release rate and HC and NOx emissions were at a constant speed variation of the fuel percentage test NOx emission decreased at a higher biogas percentage, for UHC it increased at a higher biogas percentage, it is possible to add oxygen intake through a turbocharger or supercharger as an auxiliary equipment.
Evaluasi Karakteristik Deep-v Planing Hull Dengan Menggunakan Metode Moving Grid Mesh Samuel Samuel; Muhammad Iqbal; Andi Trimulyono; Dedi Budi Purwanto; Betty Ariani
Warta Penelitian Perhubungan Vol 34, No 1 (2022): Warta Penelitian Perhubungan
Publisher : Sekretariat Badan Penelitian dan Pengembangan Perhubungan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25104/warlit.v34i1.1591

Abstract

Karakteristik Deep-v planing hull sangat dipengaruhi oleh bentuk dan kecepatan kapal. Bentuk pada haluan kapal akan mempengaruhi performance kapal pada saat kondisi air tenang dan gelombang. Semakin tinggi kecepatan kapal maka akan semakin sulit untuk memprediksi karakteristik kapal tersebut. Pada penelitian ini akan menggunakan pendekatan Computational Fluid dynamic (CFD) dengan menggunakan metode moving grid mesh untuk mengevaluasi karakteristik kapal pada saat kondisi air tenang dan gelombang regular. Perhitungan numerik menggunakan persamaan RANS (Reynolds-Averaged Navier-Stokes) dengan model turbulensi k-ε untuk memprediksi aliran turbulen. Hasil simulasi pada kondisi air tenang hambatan menunjukkan trend yang baik pada kecepatan rendah, sementara pada kecepatan tinggi ada perbedaan yang signifikan. Pada kondisi gelombang regular hasil simulasi numerik masih perlu pendekatan yang lebih baik.
Investigation of Hull Design Modifications on Fuel Consumption and Energy Efficiency Design Index (EEDI) Betty Ariani; Rizky Chandra Ariesta; Rembo Prasetya; Marista Oktaviani; Mohammad Hanifuddin Hakim
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 19, No 3 (2022): October
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v19i3.47029

Abstract

Currently, efforts are focused on reducing emissions to support carbon neutrality by 2050 through green technology. Green technology applies to the ship's design, port, engine selection, fuel, and operation. This study modified the hull to reduce drag and improve fuel efficiency. Changes were made based on variations in the deadrise angle, which were analyzed using numerical simulation. In the current situation, the deadrise angle is changed from 9° to 10°, 15°, and 20°. On the angle variation, the effects of changes in ship drag, fuel, and energy efficiency design index were analyzed (EEDI). The method simulates computational fluid dynamics with a Holtrop calculation method validation approach. At 12 and 6 knots above the current deadrise, resistance is reduced by 8.2% and 6.8%, respectively. The fuel efficiency achieved is 6.9% at 6 knots and 8.2% at 12 knots, resulting in monthly fuel savings of 2.43 tonnes. Furthermore, the phenomenon of the EEDI value at the lowest resistance and highest speed has a decreased performance value. Reducing the speed from 12 to 9 knots improves the performance of EEDI by 66%
OTOMATISASI MESIN PENGGORENGAN KRUPUK PASIR BEDA RASA DALAM UPAYA PENINGKATAN PRODUKSI DAN EFFISIENSI BAHAN BAKAR PADA UMKM KRUPUK PASIR UNIVERSITAS MUHAMMADIYAH SURABAYA Ponidi; Tining Haryanti; Betty Ariani
Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Vol 3 (2022): PROSIDING SEMINAR NASIONAL PENGABDIAN KEPADA MASYARAKAT - SNPPM2022
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract One of the obstacles in the production of crackers is related to the manual cracker frying machine using firewood as the heat source for the cracker fryer, there is no temperature regulation so that it often overheats and reduces the quality of the fried crackers. The very high room temperature and the smoke from the wood-fired stove meant that not many workers survived. Seeing the existing phenomena and based on observations, it is felt that efforts are needed to improve the operational system and the performance of the sand cracker production unit. The use of human power to rotate the furnace will be replaced by an automatic control system using electrical energy via an electromotor. In addition, the replacement of wood fuel with gas fuel is carried out so that it is cleaner, equipped with controlled temperatures. The cracker frying chamber can have a relatively lower temperature and is free of smoke or soot from firewood. The temperature of the drum of the cracker sand fryer is installed with a sensor as a means of controlling the size of the temperature using an electronic control unit (ECU), thereby obtaining a truly ideal temperature for frying. By automating the frying machine there is an increase in the average frying time and quality. an average of 31.19% and an increase in production capacity of 36.67%. Meanwhile, fuel consumption has an efficiency of 28%. Abstrak Salah satu yang menjadi kendala dalam proses produksi krupuk pasir adalah terkait mesin penggoreng krupuk pasir masih manual dengan menggunakan kayu bakar sebagai sumber panas mesin penggoreng krupuk, tidak adanya pengaturan suhu sehingga kerapkali overheat dan menurunkan mutu kerupuk yang digoreng. Suhu ruang yang sangat tinggi dengan asap pembakaran dari tungku dengan bahan bakar kayu menjadikan tidak banyak tenaga kerja yang bertahan. Melihat fenomena yang ada dan berdasarkan observasi maka dirasakan perlu upaya perbaikan dalam sistem operasional dan kinerja unit produksi krupuk pasir. Pemakaian tenaga manusia untuk memutar tungku akan digantikan dengan sistem control otomatis menggunakan energi listrik melalui electromotor. Selain itu dilakukan penggantian bahan bakar kayu menjadi bahan bakar gas sehingga lebih bersih dilengkapi dengan temperatur terkontrol. Ruang penggoreng krupuk bisa relatif lebih rendah temperaturnya serta bebas dari asap maupun jelaga kayu bakar. Temperatur drum ruang penggoreng krupuk pasir dipasang sensor sebagai sarana pengontrol besar kecilnya temperature dengan menggunakan elektronik control unit (ECU), dengan demikian akan diperoleh besaran temperatur yang benar-benar ideal dalam pengorengan.Dengan melakukan otomatisasi mesin penggorengan terdapat peningkatan waktu dan kualitas penggorengan rata-rata sebesar 31,19 % dan peningktan kapasitas produksi sebesar 36,67%.Sedangkan pemakaian bahan bakar ada effisiensi sebesar 28 %.
Co-Authors Andi Trimulyono Dedi Budi Purwanto Dedy Wahyudi Haryanti, Tining Marista Oktaviani Mohammad Hanifuddin Hakim Mohammad Taufik Ar Rozi Muhammad Iqbal Ponidi Rembo Prasetya Rizky Chandra Ariesta Samuel Samuel