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All Journal Jurnal Riset Kimia Jurnal Sains Teknologi Transportasi Maritim Majalah Ilmiah Gema Maritim Indonesian Journal of Marine Engineering Indonesian Journal of Port and Shipping Management
Utari, Riyadini
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Humanities Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Social Sciences Transportation

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Penentuan Resistivitas Tak-Terkompensasi Cairan Ion Berbasis Imidazol dengan Metode EIS: Pengaruh Panjang Alkil dan Perbedaan Anion Patah, Aep; Rachmawati, Yulia; Utari, Riyadini; Rochliadi, Achmad
Jurnal Riset Kimia Vol 11, No 2 (2020): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v11i2.359

Abstract

Ionic liquids have interesting properties because they have several advantages compared to conventional organic solvents, such as high thermal stability, high viscosity, good solvent properties, non-flammable, and non-volatile. In electrochemistry, ionic liquids can be used as solvents without the addition of electrolytes. However, ionic liquids still have resistivity properties (uncompensated resistance), thus ohmic drop measurements are needed for a potential correction. Imidazole-based ionic liquids, which are known for their high conductivity and commonly used as a solvent, have been measured of their resistivity as a function of temperature, and type of their cations/anions. Electrochemical Impedance Spectroscopy (EIS) method was chosen to measure the resistivity of ionic liquids and Bode plot was generated for the analysis of the results. The measured resistivities of ionic liquids are in the range of 420 to 1500 ohm. It is concluded that the resistivity of the imidazole-based ionic liquid is influenced by the size of their constituent ions, the viscosity, and the resistance is decreased with increasing temperature.
Solenoid Valve Control Design Using Arduino On Freshwater Generator Properties Prasetyo, Aditya; Narto, Amad; Sujarman, Febria; utari, riyadini
Nama Jurnal Akmi Vol 5 No 2 (2023): Jurnal Sitektransmar November 2023
Publisher : LPPM AKMI SUAKA BAHARI CIREBON

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51578/j.sitektransmar.v5i2.73

Abstract

In the modern era of the maritime world, the learning process related to ship machinery is essential and crucial for students to master. So many effective learning methods are used, one of which is the learning method using machining aids on ships. Therefore, making ship machining aids is an exciting thing to work on in this modern era. The type of teaching aid made by the author is a solenoid valve controlled by Arduino on a freshwater generator teaching aid. The method used is research and development, a process or steps to develop a new product or improve an existing product, both hardware and software. The model in this development research is a procedural model, which outlines the manufacturing steps exposed sequentially and gradually from the beginning to the end. The solenoid valve control model by Arduino on the freshwater generator teaching aid utilizes two electronic modules: the Arduino Uno type module and the one-channel timer delay relay module. The two modules are programmed directly with the buttons on the module. The working system in this prop is that the heater is filled with water and then heated, and then the water vapor is flowed through the transfer pipe and condensed using a condensor and holding tank. This system can run because of the automation control system in the electronic module.
Analysis Of Not Rotating Valve Rotator On Main Engine Performance In KM. LABOBAR Dewantoro, Pamungkas Ade; Narto, Amad; Utari, Riyadini
Nama Jurnal Akmi Vol 6 No 2 (2024): Jurnal Sitektransmar November 2024
Publisher : LPPM AKMI SUAKA BAHARI CIREBON

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51578/j.sitektransmar.v6i2.92

Abstract

The main engine serves as the primary power source for propelling the ship forward and backward. This engine operates on an internal combustion system, where fuel and air are compressed in the combustion chamber to generate thermal energy, which is then converted into mechanical energy through piston movement. This study employs a qualitative descriptive method with SHEL data analysis techniques, identifying the causative factors, impacts, and corrective measures associated with the non-rotation of the valve rotator in the main engine. The findings indicate that the primary cause of the valve rotator's non-rotation is improper installation of the valve collet and wear on the valve rotator body, which affects valve performance and reduces the overall efficiency of the main engine. Corrective actions include replacing the valve rotator and performing routine lubrication checks to prevent further damage.
Penyelesaian Klaim Slow Speed & Over Bunker Pada MT Gas Komodo Di PT Buana Lintas Lautan tbk Fefant, Maretta Dwiandini; Sari , Latifa Ika; Utari, Riyadini
Jurnal Angkutan Laut dan Kepelabuhanan Vol 2 No 1 (2025): Edisi Februari 2025
Publisher : Politeknik Ilmu Pelayaran Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46484/ijpsm.v2i1.834

Abstract

Kapal sebagai armada yang mengangkut barang untuk sampai ke tempat atau pelabuhan tujuan dengan lancar dan sesuai dengan waktu yang diperkirakan. Keterlambatan berlayar dapat terjadi jika pengiriman barang tidak dilakukan secara maksimal sehingga dapat berdampak pada penggunaan bahan bakar serta kecepatan laju kapal yang telah disepakati dalam kontrak, kedua hal ini disebut sebagai kasus slow speed and over bunker. Tujuan penelitian ini untuk mengetahui penyebab serta proses penyelesaian klaim slow speed & over bunker pada kapal charter MT Gas Komodo di PT Buana Lintas Lautan Tbk. Penelitian ini dilaksanakan dengan metode deskriptif kualitatif. Peneliti menggunakan observasi, wawancara serta dokumentasi (triangulasi) dalam pengumpulan data. Peneliti mengumpulkan data sekaligus menguji keabsahan data dengan mengecek melalui beberapa sumber data seperti melakukan wawancara dengan tiga narasumber yaitu staff compliance, staff operation, dan staff chartering PT Buana Lintas Lautan Tbk. Peneliti melakukan teknis analisis data melalui pengumpulan data, reduksi data, penyajian data, dan penarikan kesimpulan. Penyebab terjadinya klaim slow speed & over bunker pada MT Gas Komodo di PT Buana Lintas Lautan Tbk adalah cuaca buruk. Kondisi cuaca mengakibatkan kapal mengalami keterlambatan pada saat kedatangan di pelabuhan tujuan. Hal tersebut menyebabkan kapal harus melakukan penurunan kecepatan (slow speed) yang mengakibatkan dampak juga terhadap pemakaian bunker yang berlebih (over bunker). Langkah-langkah penyelesaian klaim slow speed and over bunker pada MT Gas Komodo di PT Buana Lintas Lautan Tbk yaitu tahap menerima pemberitahuan klaim dan memberikan respon atas pemberitahuan klaim dari perusahaan, melakukan cek kesesuaian data pada kalkulasi klaim, pengecekan data cuaca melalui instansi BMKG, tahap akhir yaitu konfirmasi pembatalan klaim oleh pencharter kapal
Optimalisasi Perawatan Sistem Bahan Bakar Guna Menunjang Kinerja Dari Mesin Induk di MV. Thomas Selmer Figo Pratama; Mustholiq; Utari, Riyadini; Hendro Sulistio; Hermono; Riyadi, Slamet; Setia Budi, Eka; Mafrisal, Mafrisal; Kurniawan, Iwan
Indonesian Journal of Marine Engineering Vol 1 No 2 (2024): August
Publisher : Politeknik Ilmu Pelayaran Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46484/ijme.v1i2.759

Abstract

The engine or prime mover on the ship is a device used to move the ship in its operation to carry cargo from one place to another. The fuel system is one of the systems that support the operation of the main engine, therefore it is very important to maintain the quality of the fuel used on board. The purpose of this thesis research is to find out what factors can affect the poor quality of the fuel system, find out what impact is caused by not optimizing the maintenance of the fuel system, and find out how efforts are made to optimize the maintenance of the fuel system to support the performance of the main engine on the MV. Thomas Selmer. The research uses a qualitative descriptive method with fishbone data processing techniques to describe and explain the object under study. Data obtained in this study through observation, and interviews, fishbone diagram is a data processing technique used to improve quality. This diagram shows the relationship between cause and effect of a problem. The results showed that the decline in the quality of HFO on board MV. Thomas Selmer was caused by several things, namely: Not optimal performance of the HFO purifier, Limited fuel oil chemical treatment, and HFO that is not in accordance with ISO 8217 standards. The impact of not optimizing maintenance on the fuel system is a decrease in pump pressure, a lot of sediment in the purifier, an increase in the volume of the sludge tank, and incomplete combustion in the main engine. Carrying out fuel oil analysis and fuel oil treatment procedures in accordance with the manual book and setting point temperatures in accordance with laboratory results are efforts that can be made to maintain fuel quality so that the performance of the main engine becomes optimal.
Penyebab Turunnya Kinerja Kompresor Udara Tiga Tingkat pada saat Proses Olah Gerak di Kapal Mv. Oriental Jade Baskoro, Lorenzo Heyting Baskoro; Prasetyo, Dwi; Utari, Riyadini
Indonesian Journal of Marine Engineering Vol 2 No 2 (2025): August
Publisher : Politeknik Ilmu Pelayaran Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46484/ijme.v2i2.1021

Abstract

The performance of the three-level air compressor on the ship has an important role in supporting the motion process, especially in supporting the main engine system. This study aims to analyze the factors that cause the decline in the performance of the three-level air compressor on board MV Oriental Jade. Descriptive qualitative research methods and a fishbone diagram approach, data was obtained through direct observation, interviews with crew members, and documentation studies. The research identified four main causes of air compressor performance degradation, namely narrowing of the air passage at the air radiator due to dirt accumulation, jamming of the spring concentric valve due to over running hours and dirt, and malfunction of the unloader valve. These problems caused the air pressure in the compressor to drop to 10 bar, far below the ship's optimal requirements. The impacts included delays in maneuvering, disruption of main engine operations, and a decrease in the ship's overall efficiency. This research provides recommendations in the form of increasing the frequency of air compressor maintenance, replacing components such as spring concentric valves and unloader valves that have passed the usage time limit, and routine cleaning of radiator water. In addition, the implementation of a better monitoring system can help detect potential damage early on. The findings are expected to serve as a practical guide for ship operators and fleet managers to improve the operational efficiency of the tri-level air compressor and reduce the risk of disruption to the ship's propulsion process.
Rancang Bangun Prototype Alat Peraga Pengoperasian Palka dengan Rain Sensor Samudra, Edwin; Narto, Amad; Sapan, Yustina; Utari, Riyadini
Majalah Ilmiah Gema Maritim Vol 25 No 1 (2023): Gema Maritim Vol 25 No 1 Bulan Maret 2023
Publisher : Politeknik Bumi Akpelni

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37612/gema-maritim.v25i1.427

Abstract

Rain sensor is a sensor that functions as a rainwater detection device, this sensor if exposed to rainwater on the sensor board then the resistance will change. The application of this sensor can be used on the hatch cover on ships automatically so that when it rains the sensor detects and will give a warning or for additional use can be used for the operation of closing the hatch, for the types on the market there are FC37 and YL83. This research uses Research and Development methods, starting from analysis, design, design, programming, and testing. In this study, the operating model of hatch props using rain sensors was determined, namely by using a circuit, Arduino Uno as a microcontroller, and several types of sensors as supporting devices. The result of making this prop is to facilitate learning for cadets and this prop is also a miniature on board, so the author hopes that this prop can be developed again for future research, and with the use of this rain sensor will help the ship's crew in operating the hatch automatically.
Co-Authors Aep Patah Baskoro, Lorenzo Heyting Baskoro Dewantoro, Pamungkas Ade Dwi Prasetyo Fefant, Maretta Dwiandini Figo Pratama Hendro Sulistio Hermono Iwan Kurniawan Mafrisal, Mafrisal Mustholiq Narto, Amad Prasetyo, Aditya Rochliadi, Achmad Samudra, Edwin Sapan, Yustina Sari , Latifa Ika Setia Budi, Eka Slamet Riyadi Sujarman, Febria Yulia Rachmawati