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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Jurnal Teknik ITS Program Kreativitas Mahasiswa - Karsa Cipta International Journal of Marine Engineering Innovation and Research Automotive Experiences Jurnal Pengabdian Masyarakat Bangsa International Journal of Renewable Energy Development
Frengki Mohamad Felayati
Department of Marine Engineering, Institut Teknologi Sepuluh Nopember
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Modification of Double Helical Kapiler Pipe to Reduce Temperature in a 100 Liter Capacity Freezer on the Ship Prayogi, Urip; Felayati, Frengki Mohamad; Sugianto, Erik; Syaifuddin, Muhammad Rizal
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 21, No 2 (2024): June
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v21i2.63798

Abstract

The freezer machine is one of the tools on board and serves to maintain the temperature of food ingredients to keep it in good condition and fresh. Given the importance of this, the cooling machine is a tool that functions to make durable foodstuffs by naturally maintaining the temperature. Standard freezer machines produce temperatures only up to -15oC. Modification of the freezer machine needs to be done so that the temperature reaches a lower minus again by changing the capillary pipe from standard to double helical. The purpose of this study is to analyze the effect of double helical capillary pipes on the working performance of a 100-liter capacity freezer cooling machine using R600A refrigerant. In this study the frezzer machine was modified by replacing a single capillary pipe into a double helical. The method used is to conduct experiments to take data to determine the temperature produced and calculate the Coefficient of Performance (COP)  before and after modification. The results of this study are the lowest temperature in the double helical capillary pipe variation during the three-hour test obtained a temperature in the range of -20.2oC while the standard capillary pipe obtained a temperature in the range of -14.9oC. The average COP for standard capillary pipes is greater at 2.773 compared to the COP of double helical capillary pipes which is 2.421. At double helical temperature values are cooler than standard capillary pipes. However, the disadvantage is that the COP of the double-helical capillary pipe is lower than the COP of the standard capillary pipe.
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.
Co-Authors Abdul Ghofur Addien Wahyu Wiranata Batutah, Moh Arif Betty Ariani Buwono, Ayom Cahyono, Beny Cahyono, Beny Fanny Octaviani Janah, Sholikhatul Moh. Musleh Mohammad Danil Arifin Muswar Muslim Nilam Sari Octaviani Prasetiyo, Yudha Prasutiyon, Hadi Prayogi, Urip Rizky Akbar Wiradhika Saputra, Mukhammat Bayu Semin Semin Sony Junianto Sugianto, Erik Sutarsis Sutarsis Sutopo Purwono Syaifuddin, Muhammad Rizal Taufik Fajar Nugroho Widhihartanti, Theresia Wijaya, Dimas Hadi Yeddid Yonatan Eka Darma Yudha Prasetiyo