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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan International Journal of Marine Engineering Innovation and Research Sewagati
Adhi Iswantoro
Departemen Teknik Sistem Perkapalan Institut Teknologi Sepuluh Nopember Surabaya
Arts Humanities Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Pelatihan Tentang Modifikasi, Pengoperasian dan Perawatan Mesin Dual Fuel untuk Nelayan di Daerah Kenjeran Surabaya Adhi Iswantoro; I Made Ariana; Semin; Aguk Zuhdi Muhammad Fathallah; Beny Cahyono
Sewagati Vol 4 No 3 (2020)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (798.49 KB)

Abstract

Saat ini kebutuhan bahan bakar minyak (BBM) meningkat, tetapi tidak dibarengi ketersediaan BBM melimpah. Sehingga beberapa daerah di Indonesia mengalami kelangkaan BBM. Salah satu masyarakat yang merasakan dampaknya nelayan. Nelayan tidak bisa mencari ikan karena kelangkaan BBM. Salah satu cara mengatasi hal tersebut adalah adanya bahan bakar alternatif, diantaranya adalah bahan bakar gas (BBG). Beberapa nelayan telah menggunakan kombinasi antara LPG dan BBM. Akan tetapi perlu adanya sosialisasi lebih lanjut kepada nelayan agar penggunaannya lebih aman dan modifikasi mesin dilakukan dengan benar. Atas permasalahan tersebut, maka perlu adanya pelatihan kepada nelayan tentang modifikasi mesin konvensional menjadi mesin dual fuel. Dalam kegiatan ini kami melakukan pelatihan kepada nelayan di daerah Kenjeran Surabaya tentang cara memodifikasi, pengoperasian dan perawatan mesin. Dari hasil analisis yang dilakukan berdasarkan keterangan nelayan, dengan jarak tempuh yang sama, jika menggunakan BBM, sekali melaut pergi-pulang membutuhkan 8 liter BBM, jika dirupiahkan sekitar Rp 80.000,-. Tetapi jika menggunakan mesin dual fuel, untuk mesin bensin membutuhkan 1 tabung LPG 3 kg harganya Rp 17.000,-. Sementara untuk mesin diesel butuh 1 tabung LPG 3 kg harganya Rp 17.000,- dan BBM 3 liter harga sekitar Rp 30.000,- sehingga jika ditotal Rp 47.000,-. Sehingga ini bisa sebagai bahan bakar alternatif dan lebih hemat.
Pengenalan dan Pemberian Wawasan Sistem Propulsi Kapal pada Siswa SMA Insan Cendekia Sukoharjo Adhi Iswantoro; I Made Ariana; Semin; Aguk Zuhdi Muhammad Fathallah; Beny Cahyono
Sewagati Vol 6 No 4 (2022)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1390.907 KB) | DOI: 10.12962/j26139960.v6i4.376

Abstract

Sejalan dengan visi pemerintah Indonesia di era Presiden Joko Widodo yaitu ingin membuat Indonesia menjadi poros maritim dunia, maka ada banyak hal yang harus disiapkan. Salah satunya adalah menumbuhkan jiwa bahari pada masyarakat Indonesia, khususnya generasi muda sebagai penerus bangsa serta menyiapkan sumber daya manusia yang handal di bidang maritim. Dimana saat ini cukup banyak generasi muda yang kurang mengenal sektor maritim. Atas dasar hal-hal tersebut, maka perlu ada kegiatan yang betujuan untuk kembali menumbuhkan jiwa bahari. Salah satu cara yang cukup efektif untuk mengatasi permasalahan tersebut diatas adalah dengan melakukan pengenalan dan pemberian wawasan bahari dan maritim pada generasi muda, yaitu pada siswa-siswi sekolah menengah atas atau kejuruan. Untuk itu tim pengabdian masyarakat membuat suatu kegiatan yang melibatkan pihak sekolah, yaitu SMA Insan Cendekia Sukoharjo. Dalam kegiatan ini dilakukan pengenalan mengenai Indonesia sebagai bangsa bahari & kepulauan, perjuangan Ir. Juanda dalam bidang maritim dan sistem propulsi yang ada di kapal. Dari hasil kegiatan tersebut, di awal memang mayoritas siswa belum mengetahui tentang bidang maritim. Akan tetapi para siswa sangat antusias ketika sesi tanya jawab berlangsung. Dalam kegiatan ini dihadiri oleh Wakil Kepala sekolah bidang akademik dan 35 siswa.
Pembuatan Water Bike untuk Mendukung Wisata Air di Ecowisata Waduk Tempuran Blora Trika Pitana; Agoes Santoso; Beny Cahyono; Adhi Iswantoro; Nurhadi Siswantoro; Dwi Oktavianto Wahyu Nugroho
Sewagati Vol 7 No 1 (2023)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5628.155 KB) | DOI: 10.12962/j26139960.v7i1.462

Abstract

Waduk Tempuran merupakan salah satu waduk yang terletak di Kabupaten Blora, Jawa Tengah. Peran daripada waduk ini sangat penting terutama untuk pengairan lahan pertanian di sekitar wilayah Kecamatan Blora sejak jaman sebelum Indonesia merdeka. Selain itu, manfaat lain dari waduk ini adalah sebagai salah satu wisata andalan di Kabupaten Blora. Dengan anugerah kondisi alam dan geografis yang indah, tentu ini menjadi daya tarik untuk wisatawan. Wisata yang selama ini sudah ada di Waduk Tempuran adalah wisata air seperti perahu naga, perahu dayung kano dan wisata kuliner berupa ikan bakar Waduk Tempuran serta wisata petik buah. Khusus untuk wisata air, masih sangat bisa dikembangkan lagi sehingga lebih menarik, salah satunya adalah dengan adanya sepeda air atau water bike. Dengan adanya sepeda air ini maka akan semakin banyak pilihan wisata air bagi wisatawan untuk menikmati keindahan Waduk Tempuran. Harapannya pembuatan sepeda air ini menjadi edukasi kepada pengunjung untuk tetap berolahraga dan menjadi pemicu warga sekitar untuk membuat sepeda air dengan desain yang lain.
Penerapan Konverter-kit Bahan Bakar Ganda untuk Mesin Kapal Nelayan di Kalanganyar Sidoarjo Adhi Iswantoro; I Made Ariana; Semin; Aguk Zuhdi Muhammad Fathallah; Beny Cahyono
Sewagati Vol 7 No 3 (2023)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v7i3.516

Abstract

Penggunaan bahan bakar minyak (BBM) di masyarakat untuk transportasi, termasuk nelayan masih sangat tinggi, sementara penggunaan bahan bakar gas (BBG) pada sektor transportasi masih tergolong rendah. Padahal BBG memiliki banyak keunggulan, yakni lebih murah dan lebih bersih dari segi emisinya. Ketergantungan pada satu jenis bahan bakar ini sangat berpengaruh pada kesiapan operasional kapal nelayan. Banyak nelayan yang terpaksa tidak mencari ikan karena harga BBM dianggap mahal atau terkadang tidak tersedia di pasaran. Salah satu cara menyelesaikan masalah tersebut adalah dengan adanya bahan bakar jenis lain selain BBM, yaitu BBG. Salah satu BBG yang bisa digunakan adalah Liqufied Petroleum Gas (LPG), karena relatif mudah didapatkan masyarakat. Penggunaan bahan bakar ganda antara LPG dan BBM bertujuan agar konsumsi BBM bisa minimal, sehingga bisa menghemat biaya operasional kapal, selain juga emisi yang dihasilkan lebih rendah. Untuk itu perlu adanya modifikasi pada mesin diesel kapal nelayan yaitu dengan pemasangan konverter kit. Sasaran dalam kegiatan pengabdian ini adalah nelayan di Kalanganyar, Sidoarjo, Jawa Timur.
Combining Optimum Propeller Design on Roro Ship Re-engine I Made Arina; Adhi Iswantoro; Salsabilla Aulia Fitri
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 20, No 2 (2023): June
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v20i2.52979

Abstract

Passenger ships serve several areas in Indonesia, one of which is KMP (Kapal Motor Penumpang) Dharma Rucitra 3. In 2020 this ship had an accident and almost sank, then causing the main engine to submerge. With this problem, it is necessary to repower with the engine provided by the company, by replacing the old engine with a new engine. The new engine namely Yanmar 6N21A SV with a power of 1200 HP at 850 RPM. Initially the ship's speed was 12 knots with the data of Makita GNLH 630M engine with a power of 1300 HP at 375 RPM with a B4-50 propeller. To achieve the desired speed, it is necessary to have an optimal propeller to improve engine performance. In this research, an algorithm has been specially developed to find the optimum propeller design of B-series propellers for KMP Dharma Rucitra 3 by defining the overall parameters of a propeller like diameter, pitch-ratio, blade area ratio and the number of blades. The optimum propeller design is performed as multi-objective function to constraints imposed by propeller parameters. The computer program has been developed to select the optimum propeller by considering the boundary condition of system, hull-propeller interactions, and engine-propeller matching (EPM). This research also carried out open water and self-propulsion simulations using computational fluid dynamics (CFD). Then it can be concluded that the development of an algorithm to optimize the selection of propellers on KMP Dharma Rucitra 3 obtained propellers with B4-49.6 type with a diameter of 1,995 m so that it can reach a speed of 14,2 knots at 85% maximum continuous rating of engine power. 
Performance and Emission Analysis of Four-Stroke Diesel Engine Single Cylinder on Toroidal Piston Modification with B30 Fuel Adhi Iswantoro; I Made Ariana; Bagus Gigih Luqmananto; M. Furqon Maulana; Semin Maulana
International Journal of Marine Engineering Innovation and Research Vol. 7 No. 4 (2022)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v7i4.5548

Abstract

Improvement of the performance of the diesel engine can be done by expanding the combustion chamber. One of the objectives of this research is to obtain optimal piston performance by modifying the piston crown to be 1mm deeper than the standard piston using B30 fuel. This research is also proof of previous research with a simulation that concluded that the performance of a diesel engine using a modified toroidal combustion chamber (TCC) +1mm piston has better performance than a standard piston. This research will analyze the comparison of the performance of a diesel engine using a standard piston and a modified piston on the diesel engine, using an experimental method with B30 biodiesel fuel with engine speed (RPM) variation of 1900 and 2100, also the dummy loads used are 1000, 2000, 3000, and 4000 Watts (W). From the results of the performance tests, it is concluded that the standard piston produces better performance than the modified piston with a very small difference in value in terms of torque, power, and SFOC. The level of NOx emissions produced by the standard RPM 1900 with 1000 W load is 1,483 g/KWh, at a load of 2000 W is 1,011 g/KWh, at a load of 3000 W is 1.375 g/KWh, at a load of 4000 W is 2,372 g/KWh, for standard piston RPM 2100 NOx emission levels produced at 1000 W load is 1,902 g/KWh, at 2000 W load is 1,450 g/KWh, at 3000 W load is 1.368 g/KWh, at 4000 W load is 1,066 g/KWh. The level of NOx emissions produced using a modified piston at 1900 RPM at 1000 W load is 1.865 g/KWh, at 2000 W load is 1.326 g/KWh, at 3000 W load is 1,250 g/KWh, at 4000 W load is 0.857 g/KWh, for RPM 2100 uses a modified piston at a 1000 W load is 1,970 g/KWh, at a 2000 W load is 1,583 g/KWh, at a 3000 W load is 1,465 g/KWh, at a 4000 W load is 1,226 g/KWh. NOx emission levels using standard pistons at RPM 1900 with B30 fuel tend to be smaller at low loads and larger at high loads compared to modified pistons, while NOx emission levels using standard pistons at RPM 2100 fueled by B30 are smaller than using a modified piston.
Analysis of The Injection Pressure Effect on Single Cylinder Diesel Engine Power with Diesel Fuel-Methanol Blend Aguk Zuhdi Muhammad Fathallah; Adhi Iswantoro; Semin Iswantoro; Beny Cahyono; I Made Ariana; Ananda Rizky Budi Pratama
International Journal of Marine Engineering Innovation and Research Vol. 7 No. 2 (2022)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v7i2.5615

Abstract

The use of fossil diesel fuels still produces carbon dioxide emissions (CO2), sulphur dioxide (SO2), hydrocarbon emissions (HC), nitrogen oxide (NOx), and high total particles and carbon monoxide (CO). Moreover, the need for transportation of motor vehicles will always increase every year. The emission of exhaust gases resulting from the combustion process can essentially be reduced by improving fuel quality, the homogeneity of the fuel mixture, and regulating proper combustion. There are several ways to reduce exhaust emissions from diesel engines by providing precise injection pressures. This is done to get the perfect combustion. In addition, improving fuel quality is a way to reduce emissions of exhaust gases. Another one is by adding methanol to the diesel. The addition of methanol can reduce the emission of exhaust gas produced. The process of mixing the solar and methanol takes the addition of surfactants to obtain good homogeneity. Testing was conducted using simulation software with engine modeling. The result can be seen in the reduction and the addition of standard pressure 200 bar, that the emulsion fuel in SFOC (specific fuel oil consumption) suffered a decrease and increased by 0.2% and 0.3% at pressure 160 bar and pressure 240 bar. The fuel solution on SFOC suffered a decrease and an increase of 0.3% and 0.25% was produced by pressure 160 bar and pressure 240 bar. The highest NOx is produced by 240 bar injection pressures with Dexlite fuel while the lowest NOx is produced by 160 bar injection pressure with emulsion fuel.
The Modification Effect of Piston Crown on Four Stroke One Cylinder Diesel Engine using Biodiesel B30 on Noise Based on Simulation. Beny Cahyono; Adhi Iswantoro; Ilham Rezandhi Akbar
International Journal of Marine Engineering Innovation and Research Vol. 5 No. 4 (2020)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v5i4.5963

Abstract

Piston is one of the important parts in the combustion process in a diesel engine, it consists of two namely the piston head and connecting rod, where the piston head consists of three parts, namely the piston crown, piston rings, and piston pins. This paper wants to prove which is more effective in modifying the TCC piston crown shape on a four-Stroke one-cylinder diesel engine fueled with B-30 in terms of noise. To measure noise, several experiments were carried out. One way is to use an application that can help make measurement easier is to use the simulation. The Simulation can measure the level of noise by using the tools in an application the same as in reality. The piston area is very influential on the combustion process, with the greater piston area, the resulting explosion is greater which results in and produces a high pressure also it is directly proportional to the noise level. After everything is measured, then we compare it with the engine's performance and give maximum results between the level of noise with engine performance. The result is using a piston case 4 (+1) which has a larger area experiencing the highest noise level using B30 Diesel Fuel or High-Speed Diesel (HSD) Fuel. Under load conditions, with a 50% load, the noise level on piston +1 (Case 4) experiences the highest noise level using B30 Diesel Fuel or High-Speed Diesel (HSD) Fuel.
The Effect of Blend Fuel Waste Plastic and Waste Cooking Oil on Diesel Engine Performance based on Simulation Aguk Zuhdi Muhammad Fathallah; Adhi Iswantoro; A Karomur Roziq F
International Journal of Marine Engineering Innovation and Research Vol. 5 No. 3 (2020)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v5i3.5998

Abstract

Nowadays, polypropylene plastics are very often found and cause various environmental problems. Though it is known that along with polypropylene itself comes from propylene monomers obtained from refining petroleum. Besides the use of waste cooking, biodiesel fuel has many drawbacks, one of which is power and fuel consumption. Mixing polypropylene plastic waste for reuse with waste cooking oil biodiesel is an option. This study uses five variations of fuel, namely HSD, B30, C20, C30, and C40, a combination of HSD, waste cooking, and polypropylene. This research is based on experiments to analyze the impact of using these five variations of fuel on the performance diesel engines based on simulation. The performance of the diesel engine would be measured to SFOC, power, and torque produced by each fuel. Based on the results of the analysis of the performance of the diesel engine performance of C20, fuel can be the most optimum alternative fuel to the substitute B30, producing 6.0 kW of power, 238gr / kWh of SFOC, and 31.7Nm of torque.
The Effect of Using Various Magnetic Materials on Diesel Engines using Biodiesel Fuel Aguk Zuhdi Muhammad Fathallah; Adhi Iswantoro; Hafiz N. H. Perdana
International Journal of Marine Engineering Innovation and Research Vol. 5 No. 2 (2020)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v5i2.6012

Abstract

One of method to improve engine performance and reduce fuel consumption is to use exposure to magnetic fields in the fuel lines. Several studies have proven that magnetic field exposure can improve diesel engine performance. This research aims to test the performance of a diesel engine using fuels that are given a magnetic field from 3 types of permanent magnets, namely magnets made from Neodymium Iron Boron (NdFeB), Aluminum Nickel Cobalt (AlNiCo), and Ferrite (Fe). Performance tests on the Yanmar TF85MH diesel engine include power and torque. The fuel used in this research is Biodiesel B20. The results showed that neodymium magnets (NdFeB) are the best magnets of the 3 types of magnets tested with an average increase in power of 2.30%, an average increase in torque of 2.35%.
Co-Authors A Karomur Roziq F Agoes Santoso Aguk Zuhdi M. Fathallah Aguk Zuhdi Muchamad Fathallah Ananda Rizky Budi Pratama Ananda Rizky Budi Pratama Bagus Gigih Luqmananto Beny Cahyono Cahyono, Beny Fatekhun Faris Fatekhun Faris Fathallah, Aguk Zuhdi Muhammad Gage Cendekiaji Hadi Hafiz N. H. Perdana I Made Ariana I Made Arina Ilham Rezandhi Akbar Ilham Rezandhi Akbar M. Furqon Maulana Muhammad Syuhri Nugroho, Dwi Oktavianto Wahyu Nurhadi Siswanto ramdhan febrianto saputra Ramdhan Febrianto Saputra Salsabilla Aulia Fitri Semin Semin Semin Iswantoro Semin Maulana Semin Semin Semin Semin Semin Semin Semin Semin Semin Semin Semin Semin Sukriyah Kustanti Moerad Sukriyah Kustanti Moerad Trika Pitana