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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Jurnal Teknik ITS Program Kreativitas Mahasiswa - Karsa Cipta JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY International Journal of Marine Engineering Innovation and Research Jurnal Pengabdian Masyarakat Bangsa JPMP International Journal of Renewable Energy Development
Frengki Mohamad Felayati
Department of Marine Engineering, Institut Teknologi Sepuluh Nopember
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Performance and carbon emissions of a diesel/oxy-hydrogen dual-fuel engine with oxy-hydrogen injection variation under low and medium load conditions Felayati, Frengki Mohamad; Prasutiyon, Hadi; Janah, Sholikhatul; Wijaya, Dimas Hadi; Saputra, Mukhammat Bayu; Semin, Semin
International Journal of Renewable Energy Development Vol 13, No 2 (2024): March 2024
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2024.57983

Abstract

Reducing carbon emissions such as carbon dioxide (CO2) and carbon monoxide (CO) from diesel engines struggled with engine performance challenges and fossil fuel limitations. Besides, huge transportation such as ships hardly replaced diesel engines due to the higher thermal efficiency and low operation cost. Oxy-hydrogen gas, as a carbon-free gas, could potentially improve diesel engine performance and carbon emissions. Most of the studies tried to identify the effect of oxy-hydrogen induction into diesel engine combustion on performance and emissions. However, this study evaluated oxy-hydrogen injector sizes to the diesel engine performance and carbon emissions at several loads and several engine speed conditions. Overall, the result showed that the oxy-hydrogen gas injection into the diesel engine’s intake port improved the performance and carbon emissions compared to the single diesel fuel as a baseline. High engine performance with low carbon emissions could be achieved at low and medium engine load conditions with high engine speeds. Moreover, smaller oxy-hydrogen injector sizes were suitable for the medium engine load and vice versa, to improve the performance and carbon emissions. At low load, the engine performance improvement of engine torque, specific fuel consumption, and thermal efficiency were 1800 to 2200 rpm. Moreover, the CO2 and CO emissions reductions were also suitable with 2200 rpm with a bigger oxy-hydrogen gas injector (6 mm). Furthermore, at medium load, the engine performance improved at 1400 rpm but the CO2 and CO emissions were lower at 2200 rpm with a small oxy-hydrogen gas injector (4 mm). The engine operation at 2200 rpm with a 4 mm injector also improved the engine performance regarding carbon emissions reduction. However, injecting oxy-hydrogen gas into diesel engines had the potential to enhance the engine performance and reduce carbon emissions, moving closer to achieving zero emissions
Strategi Penataan dan Pembinaan Pedagang Kaki Lima (PKL) di Daerah Pesisir Sebagai Destinasi Wisata Baru Desa Semare Kecamatan Kraton Kabupaten Pasuruan Prasutiyon, Hadi; Felayati, Frengki Mohamad; Widhihartanti, Theresia; Musleh, Moh
Jurnal Pengabdian Masyarakat Bangsa Vol. 1 No. 11 (2024): Januari
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmba.v1i11.588

Abstract

Kabupaten Pasuruan memiliki 24 kecamatan, dengan 7 kecamatan yang letak geografisnya berhubungan dengan laut. Desa Semare adalah salah satu desa di kecamatan Kraton yang merupakan daerah pesisir yang terhubung langsung dengan Laut. Penduduk desa Semare kebanyakan mata pencahariannya sebagai nelayan yang kerjanya melaut mencari ikan . Dari hasil mencari ikan inilah meraka memenuhi kebutuhan hidupnya. Keseharian mereka terlihat dalam kesibukan menambat perahu, bertransaksi dengan tengkulak, dan membawa hasil tangkapan ke pasar atau membuka lapak di pinggiran desa. Praon tahunan dan berdirinya Cafe Laut Semare turut memicu perkembangan destinasi wisata laut. Meski membawa geliat ekonomi, peningkatan jumlah pedagang kaki lima menjadi kendala. Lokasi terbatas, rendahnya kesadaran hukum, dan kurangnya koordinasi dalam pembinaan dan penanganan menjadi tantangan. Melalui kegiatan Pengabdian Masyarakat berupa bimbingan teknis dan pendampingan, diharapkan Desa Semare dapat menjadi desa wisata terkonsep. Fokus pada penciptaan lokasi PKL yang strategis, indah, tertib, dan bersih diharapkan dapat meningkatkan kesejahteraan pedagang, menciptakan ketertiban, dan menyumbang pada pendapatan daerah. Ini merupakan langkah awal menuju konsep yang baik untuk kawasan wisata laut/pesisir, memberikan tambahan kesejahteraan masyarakat dan kontribusi pada pendapatan daerah.
PERANCANGAN DERMAGA TAMBAT UNTUK PERAHU NELAYAN PERMUKIMAN SUNGAI Felayati, Frengki Mohamad; Aditya, Bagus Kusuma; Rifandi, Safriudin; Poundra, Gde A. Prabhawatya; Widiyanto, Sinung
Jurnal Pengabdian Masyarakat Pesisir VOLUME 3 NOMOR 2
Publisher : Universitas Hang Tuah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jpmp.v3i2.114

Abstract

Nelayan yang tinggal di Keputih Tegal Timur Baru, Surabaya, memulai aktivitas mereka dengan menyiapkan perahu di tepi sungai dekat permukiman. Kegiatan ini membuat dermaga sungai menjadi vital untuk persiapan melaut. Sayangnya, dermaga konvensional yang terbuat dari bambu sering kali tidak memadai dan berisiko, seperti permukaan yang licin dan konstruksi yang kurang kuat. Oleh karena itu, diperlukan dermaga yang lebih layak dan aman untuk meningkatkan produktivitas nelayan. Pengabdian masyarakat ini bertujuan untuk merancang dermaga tambat yang sesuai dengan kebutuhan nelayan di daerah tersebut. Kegiatan dimulai dengan Focus Group Discussion (FGD) untuk mengidentifikasi permasalahan yang ada, dilanjutkan dengan survei lapangan untuk mengumpulkan data teknis. Berdasarkan hasil FGD dan survei, tim merancang dermaga yang dilengkapi dengan fasilitas pendukung seperti gudang penyimpanan alat tangkap, area bongkar muat, dan penerangan. Desain ini kemudian divalidasi dan disetujui oleh masyarakat nelayan. Hasil akhir dari kegiatan ini adalah desain dan perencanaan pembangunan dermaga yang dapat digunakan untuk mendukung aktivitas produktif nelayan sehari-hari, sehingga meningkatkan kesejahteraan mereka.
Numerical Study of Kaplan Propeller by Using CFD: Effect of Angle and Blade Diameter Variations Mohammad Danil Arifin; Frengki Mohamad Felayati; Muswar Muslim; Ayom Buwono; Yeddid Yonatan Eka Darma
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5451

Abstract

Efficient propeller performance contributes to better overall ship performance and speed. A well-designed propeller can optimize thrust generation, leading to improved maneuverability, responsiveness, and acceleration. It enables ships to maintain higher speeds while using less power, enhancing their competitiveness in the maritime industry. In this study, the Kaplan series propeller was analyzed by using Computational Fluid Dynamics (CFD). By modifying the angle of attack on the Kaplan propeller with 3, 4, and 5 blades, the distribution of the surface pressure, generated thrust, and torque value were easily identified and analyzed. The result shows that the change in the angle of attack influenced the pressure distribution on the back and face side of the propeller. The angle of attack is increased, and the pressure surface distribution also tends to increase. It has also affected the efficiency of the propeller performance which is expressed by the values of thrust propeller and torque. The more efficient the propeller performance, the less power it requires to produce the desired thrust.
Study of The Technical Approach on Recent Fuel Efficiency to Reduce Ship Emissions Mohammad Danil Arifin; Frengki Mohamad Felayati; Fanny Octaviani
International Journal of Marine Engineering Innovation and Research Vol. 7 No. 1 (2022)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v7i1.5633

Abstract

Engine emissions of ships have been highly concerned in the last decades. Most of the current ship operations worldwide are powered by the combustion engine. Advance ship powering is still on research and hard to implement directly. High cost in the application is the main issue. Meanwhile, the fuel engineering approach is proposed in the recent research to advance engine combustion, thus increasing the combustion efficiency and lowering the emissions target. This study aims to evaluate the development trend on the fuel efficiency technique to lower ship emissions. Emissions management, fuel conversion, and power conversion are the most research focus to improve fuel efficiency. However, implementing some of that research is still hard on ship operation. Technical and economic issues are the main reason. Moreover, fuel efficiency on ships is still highly based on management. Low cost, new combined fuel without separation, and less fuel treatment technology are proposed to avoid confusion on fuel consumption in the near future.
Preliminary Study of Mechanical Properties of Fiberglass Reinforced Plastic Composites as Materials for Environmentally Friendly Remote Control Lifebuoy Dwisetiono Dwisetiono; Urip Prayogi; Frengki Mohamad Felayati
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 10 No. 1 (2026): June 2026 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v10i1.17418

Abstract

Safety in waters, whether at sea, in lakes, rivers, or other bodies of water, is crucial. A practical rescue effort is to use a lifebuoy. This research is a preliminary study of Fiberglass Reinforced Plastic (FRP) lifebuoys, which could be an option for remote-controlled, air-pollution-free, electric-powered lifebuoys. The study aimed to obtain data on the mechanical properties of FRP materials with varying numbers of reinforcing layers. Material testing was conducted to determine tensile strength, bending strength, impact strength, and hardness. The results of the study showed that the addition of reinforcing layers to the Fiberglass Reinforced Plastic (FRP) material planned for this remote control lifebuoy material also increased its mechanical properties, namely tensile strength increased by about 20% per layer, bending strength increased by about 15% per layer, shear strength increased by about 28% per layer, and the impact energy absorbed increased by about 50% per additional layer. Meanwhile, the hardness number was not affected by the addition of the number of reinforcing layers.
Co-Authors Abdul Ghofur Addien Wahyu Wiranata Aditya, Bagus Kusuma Ayom Buwono Betty Ariani Cahyono, Beny Cahyono, Beny Dwisetiono, Dwisetiono Eka Darma, Yeddid Yonatan Fanny Octaviani Janah, Sholikhatul Moh Arif Batutah Moh. Musleh Mohammad Danil Arifin Muswar Muslim Nilam Sari Octaviani Poundra, Gde A. Prabhawatya Prasetiyo, Yudha Prasutiyon, Hadi Prayogi, Urip Rifandi, Safriudin Rizky Akbar Wiradhika Saputra, Mukhammat Bayu Semin Semin Sony Junianto Sugianto, Erik Sutarsis Sutarsis Sutopo Purwono Syaifuddin, Muhammad Rizal Taufik Fajar Nugroho Urip Prayogi Widhihartanti, Theresia Widiyanto, Sinung Wijaya, Dimas Hadi Yeddid Yonatan Eka Darma Yudha Prasetiyo