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PENGUJIAN TINGKAT KETELITIAN POTENSIOMETER PADA SIMULASI KEMUDI KAPAL Arif Rakhman Suharso; Ario Hendarto; Evi Sirait; Rahindra Bayu Kumara; Susanto
Wave: Jurnal Ilmiah Teknologi Maritim Vol. 16 No. 2 (2022)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jurnalwave.v16i2.5491

Abstract

Potensiometer dapat digunakan sebagai sensor untuk mengukur derajat putaran kemudi dengan membaca nilai resistansinya untuk diubah ke dalam nilai digital manggunakan analog to digital coverter yang terdapat di arduino. ADC atau disebut juga dengan Analog to Digital Converter merupakan fitur yang di miliki oleh arduino sebagai mikrokontroler guna membaca sinyal analog kemudian di konversikan menjadi sinyal digital (Elgamar, 2018). Kemudi kapal harus memenuhi persyaratan-persyaratan yang diharuskan untuk kepentingan dan keselamatan serta sesuai yang diisyaratkan dalam SOLAS 74 aturan 29 Bab II mengenai perangkat kemudi. Perangkat kemudi utama pada saat kapal melaju dengan kecepatan ekonomis maksimum, harus dapat disimpangkan sebesar 35º ke kiri/ ke kanan dalam waktu 28 detik, dari posisi port 35 derajat ke starboard 35 derajat atau sebaliknya, saat putaran mesin maksimum dan beban maksimum dalam jangka waktu maksimum 28 detik (Yusim, 2021). Hasil pembacaan potensiometer yang sudah dikonversi menjadi digital dikirimkan ke komputer melalui komunikasi serial USB dengan software yang digunakan visual basic. File visual basic dalam komputer ini berbentuk file berextensi .exe yang sifatnya executable atau dengan kata lain dapat langsung digunakan. Potensiometer yang digunakan adalah potensio dengan resistansi 100 k ohm dan tegangan referensi 5 volt dicatu dari tegangan USB komputer, hasilnya dikonversi ke digital digunakan untuk menentukan berapa derajat kemudi kapal akan berbelok ke kanan (starboard side) atau ke kiri (port side).
Simulasi dan Eksperimen Pengaruh Variasi Tekanan Injeksi Bahan Bakar Diesel Liquid pada Mesin Induk Kapal Terhadap Karakteristik Semprotan Injektor Wahyu Ari Putranto; Khaeroman Khaeroman; Susanto Susanto; Arif Rakhman Suharso
JURNAL ILMIAH MOMENTUM Vol 19, No 1 (2023)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v19i1.8296

Abstract

Mesin diesel banyak digunakan pada dunia industri dan transportasi karena kehandalannya. Di dunia transportasi laut mesin diesel digunakan sebagai mesin induk kapal yang berfungsi untuk menggerakkan kapal. Salah satu komponen yang penting pada mesin diesel adalah injektor yang bertugas untuk menyemprotkan bahan bakar ke ruang bakar. Apabila terjadi masalah pada injektor maka akan berpengaruh pada proses pembakaran sehingga dapat menurunkan kinerja mesin induk kapal. Parameter pada penelitian ini adalah diameter nosel sebesar 0,2 mm. Variasi tekanan input yang digunakan adalah 290, 310, 330 bar. Penelitian ini bertujuan untuk memperoleh parameter tekanan injektor yang optimum. Data yang diperoleh adalah sudut semprotan, panjang semprotan dan waktu semprotan. Penelitian ini menggunakan metode simulasi dan eksperimen. Simulasi menggunakan software CFD komersial sedangkan eksperimen dengan menguji injektor menggunakan injektor tester. Hasil pengujian variasi tekanan injektor 290, 310 dan 330 bar diperoleh data-data sudut semprotan masing-masing sebesar 13o, 14o, 15o. Panjang semprotan semuanya sama 100 mm tetapi waktu yang diperlukan untuk menyentuh dinding berbeda-beda, masing-masing 0,00199; 0,00197; 0,00195 sekon. Parameter optimum pada penelitian ini adalah tekanan input injektor 330 bar menghasilkan sudut semprotan 15o, Panjang semprotan 100 mm dengan waktu tercepat yaitu 0,00195 sekon.
Optimization of Reliquefaction System on Gas Carrier to Maintain The Condition and Temperature of Cargo Tank Fitri Suprapti; Susanto Susanto; Deri Hendrawan; Retno Anggoro
Dinamika Bahari Vol 4 No 1 (2023): May 2023 Edition
Publisher : Politeknik Ilmu Pelayaran Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46484/db.v4i1.351

Abstract

Transport of liquefied hydrocarbon gases and their derivatives (methane, ethane, propane, butane, ethylene, propylene and other liquefied gases) is done using gas carrier tankers. Large gas carriers are equipped with re-liquefaction system to handle cargo during the process of loading, voyaging, and unloading. A reliquefaction system is installed on gas carriers to handle the Boil off-gas (BOG) problem. Operation constraints Reliquefaction system operating the reliquefaction system include the compound characteristics, liquefaction unit operating conditions, and system performance. These issues also hinder the BOG liquefaction process. This research sought to investigate the whole operation process of the system. This case study was conducted by observing the objects directly on the MT. Chinagas Legend vessel whose main cargoes are LPG. In case studies, research is carried out by studying the phenomenon of case problems that occur directly on the object. The identified problems and its resolutions could add valueable information to science. The research results revealed that MT. Chinagas Legend had a reliquefaction system with 2-stage or 3-stage options. The former type was used for butane (C4H10) cargoes and the latter was used for propane (C3H8) cargoes. The common problem in the process of reliquefaction systems was the presence of contaminants carried with seawater and clogging the filters. A leak in the intake or discharge valve slowed down the reliquefaction process and rendered it ineffective. The problems can be overcome through periodic routine inspections on components that are directly in contact with sea water, such as sea water filters.
Analisis Ekonomi Pengoperasian Ketel Uap Bantu Laboratorium Permesinan Kapal Polimarin Dengan Variasi Bahan Bakar Susanto Santo; Okpina Rochadian; Fajar Pujiyanto
Jurnal Maritim Polimarin Vol. 9 No. 1 (2023)
Publisher : PPPM Polimarin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52492/jmp.v9i1.97

Abstract

Heat energy and steam pressure are very important properties in various life applications. The steam production process in a boiler can occur in a container or in a pipe. Fuel as a source of chemical energy for steam boilers can use solid, liquid or gas types. The use of solid fuel is relatively easier to use, by simply putting it into the fire kitchen. Use of gas as boiler fuel can use a gas burner as in a gas stove. The type of fuel oil used as boiler fuel is diesel oil. Diesel oil in order to be used as boiler fuel requires a burner as a fogger combined with compressed air. This study was conducted for the purpose of studying the performance of the boiler when operated from cold conditions to the maximum achievable pressure. Specifically, to determine the specific fuel consumption and the amount of fuel cost required. The experimental method was chosen for the study. Steam pressure and the amount of fuel required during combustion and steam production were the two parameters measured. There are 3 types of diesel oil grades that will be analysed in this study. Fuel type and quality affect the time required to reach maximum pressure. Bio diesel takes the longest time, dexlite takes a shorter time, and pertamina dex takes the shortest time. Total difference in fuel consumption for one operation of bio diesel oil, dexlite, and pertamina dex is 4.68, 4.38, and 4.19 litres respectively. The amount of cost required to pay for bio diesel oil, dexlite, and pertamina dex is Rp 31,824, Rp 62,415, and Rp 64,526 for one operation respectively. Fuel consumption for laboratories is recommended to use dexlite with better quality than bio diesel at a lower price than using Pertamina dex.
Analysis of Flexural Stress in Prototype Carding Machine Spindle Gears Made of Aisi 1020 Steel Muhammad Safii; Khaqurokhim; Rouf Muhammad; Suheri Suheri; Agung Nugroho; Susanto; Muhammad Iqbal Farhan Putra Arya
JURUTERA - Jurnal Umum Teknik Terapan Vol 11 No 01 (2024)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v11i01.9548

Abstract

Stress in a mechanically loaded structure is a critical aspect that warrants thorough investigation. The impact of stress on a structure can lead to various consequences, including crack propagation and fracture. Gears play a crucial role in transmitting power and rotation between shafts, making an in-depth analysis of stress in gears essential for ensuring mechanical reliability. Previous research has predominantly focused on stress and loads in gears, utilizing mathematical and numerical methods to explore variations in parameters such as gear diameter and thickness in various vehicles and machines. However, there is a noticeable gap in the literature regarding the analysis of the effect of AISI 1020 steel material on spur gears, particularly in the context of a carding machine for silk processing. This study aims to fill this void by employing a mathematical approach to determine the flexural stress in prototype spindle gears used in a carding machine for silk processing. Through thorough analysis and mathematical calculations, the flexural stress in the prototype spindle gears of the carding machine for silk processing was determined to be 176.32 kg/mm². This research provides valuable insights into the mechanical behavior of gears under load, specifically in the context of the unique requirements of a carding machine for silk processing.
KAJI EKSPERIMEN DAN SIMULASI PENGARUH SUDUT DOUBLE SEGMENTAL BAFFLE DAN LAJU ALIRAN FLUIDA PADA HEAT EXCHANGER JENIS SHELL AND TUBE PADA MESIN MAIN EXTRUDER TERHADAP KEBAIKAN PERPINDAHAN PANAS Muhamad Safi'i; Suheri Suheri Kertosenjoyo2; Agung Nugroho; Susanto Susanto; M. Iqbal Farhan Putra Arya; Oktarina Heriyani; Yafid Effendi
Device Vol 14 No 1 (2024): Mei
Publisher : Fakultas Teknik dan Ilmu Komputer (FASTIKOM) UNSIQ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/device.v14i1.6989

Abstract

Shell and Tube Heat Exchanger (STHX) is very important for its use in the industrial world which can support the continuity and success of the entire network process. Various kinds of research have been carried out to increase the heat transfer coefficient and effectiveness of Shell and Tube Heat Exchangers (STHX) both experimentally and by simulation. This research examines the increase in heat change coefficient and effectiveness of STHX with variations in baffle angles of 0°, 10°, and 20° with fluid mass flow rates of 2, 4, and 6 kg/s. As a result, STHX with a baffle angle of 0° has the largest heat change coefficient value than STHX with a baffle angle of 10° and 20° both during experiment and simulation, values ​​ranging from 4218 W/m²C and 4226 W/m²C at a baffle angle of 0° when the fluid flow rate is increased to 6 kg/s. Keywords: Shell and Tube Heat Exchanger, baffle angle configuration, double segmental baffle, total heat transfer coefficient, effectiveness, CFD (Computational Fluid Dynamics).
Simulasi Daun Kemudi Kapal Dengan Variasi Beban Rakhman, Arif Rakhman Suharso; Ario Hedartono; Susanto
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 5 No. 2 (2024): ARMATUR: Artikel Teknik Mesin dan Manufaktur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v5i2.6367

Abstract

A ship's steering system contains steering gear auxiliary machinery which functions to move the rudder or rudder when maneuvering the ship where the ship's rudder is located at the stern of the ship behind the propeller. This research aims to test the MG995 servo which is used to move a simulated ship's rudder to measure the time and accuracy of the angle of rotation of the rudder with various load variations in accordance with Solas rules. This research is a continuation of the previous research roadmap regarding sensor comparison for ship steering simulations. The capabilities of the MG995 servo were tested by comparing several loads to test stall torque conditions and the ability to move the ship's rudder. The equipment used in preparing this ship steering simulation includes a rudder to determine the position towards the port side and starboard side, an Arduino as control equipment, a rotary encoder to determine the rudder angle, a servo to move the rudder, and a rudder to test the load on the servo.
Pengaruh Perubahan Vakum dan Temperatur Pemanas Fresh Water Generator terhadap Produksi Air Tawar di MT. PM REGENT Susanto, Susanto; Khaeroman; Yulius Oscar; Ngatmin, Ngatmin; Heri Kiswanto
Saintara : Jurnal Ilmiah Ilmu-Ilmu Maritim Vol 8 No 2 (2024): SAINTARA (September 2024)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat, Akademi Maritim Nusantara Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52475/saintara.v8i2.343

Abstract

Fresh onboard water is required to fulfill the crew's living needs and support the ship's operations. The need for fresh water for the crew and operational support of the boat is fulfilled with fresh water purchased from the land. Water purchases can be made when the ship is in port, either when the ship is at the dock or when the boat is anchored. Additional fresh water supply can be obtained continuously while the ship is sailing. Seawater desalination is a solution to produce fresh water to fulfill the new water needs. Desalination using a freshwater generator (FWG) involves evaporation and condensation processes affected by vacuum and operating temperature. This study was conducted to determine the effect of changes in pressure and temperature parameters on the production capacity of the freshwater generator. The study was conducted using a case study method through observation, and experimentation on board MT.PM REGENT. The vacuum in the FWG chamber was varied based on the suction of the vacuum ejector. Hot water temperature as a heater in the evaporator is taken from the cooling jacket of the main engine. The result of the pump ejector pressure variation greatly affects the vacuum level of the distillation chamber At pump ejector pressures between 8 – 16 Bar, the vacuum rate can reach 99 – 100% after the pump is operated At pressures of 2 and 4 Bar, the vacuum level drops dramatically, reaching only 50 and 80 %, respectively. The lowest production of FWG when operated with 80% vacuum with a heating temperature of 75 OC is 2767 liters/day. In FWG operation with a maximum vacuum of 100% and a heating temperature of 85 OC, it is able to produce the most fresh water around 6879 liters/day. Based on the changes in parameters, it can be concluded that a decrease in the level of vacuum and heater temperature reduces the production of fresh water from the Fresh Water Generator.
Rancang Bangun Prototype Portable Pembangkit Listrik Tenaga Surya dan Bayu dengan Sistem Hybrid Kiswanto, Heri; Purwanto, Purwanto; Nurhidayati, Indah; Putranto, Wahyu Ari; Susanto, Susanto
JURNAL ILMIAH MOMENTUM Vol 20, No 2 (2024): Vol 20, No 2
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v20i2.11726

Abstract

Penelitian ini bertujuan untuk mengembangkan dan menguji sebuah prototipe pembangkit listrik portabel dengan sistem hybrid yang menggabungkan energi surya dan angin, dengan tujuan meningkatkan efisiensi dan keandalan pasokan energi di lingkungan dengan variabilitas cuaca tinggi. Sistem ini dirancang untuk memanfaatkan dua sumber energi terbarukan secara simultan, guna mengatasi keterbatasan masing-masing sumber ketika digunakan secara terpisah. Hasil pengujian menunjukkan bahwa kombinasi energi dari kedua sumber memberikan kinerja yang lebih stabil, dengan daya output maksimum yang lebih tinggi dibandingkan penggunaan satu sumber energi saja. Penerapan sistem hybrid ini diharapkan dapat mendukung upaya penyediaan energi yang lebih efisien dan berkelanjutan di daerah terpencil maupun lokasi yang memiliki tantangan cuaca dinamis.
Pemetaan Kontur Kebisingan pada Bengkel Praktik (Workshop) Politeknik Maritim Negeri Indonesia Kiswanto, Heri; Putranto, Wahyu Ari; Noviarianto, Noviarianto; Susanto, Susanto; Suyono, Suyono
JURNAL ILMIAH MOMENTUM Vol 20, No 1 (2024)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v20i1.10502

Abstract

Penelitian ini bertujuan untuk menganalisis dan memetakan tingkat kebisingan di bengkel workshop Politeknik Maritim Negeri Indonesia (Polimarin) dan mengidentifikasi area-area yang memerlukan upaya pengendalian kebisingan. Pengukuran kebisingan dilakukan pada beberapa titik di dalam bengkel praktik menggunakan alat pengukur kebisingan (sound level meter). Data tersebut kemudian diolah dengan perangkat lunak Surfer untuk membuat peta kontur tingkat kebisingan di dalam area bengkel. Hasil penelitian mengungkapkan bahwa tingkat kebisingan tertinggi secara signifikan terpusat di sekitar mesin gerinda pemotong logam, yang merupakan sumber utama kebisingan di lingkungan tersebut. Adapun hasil pengukuran menunjukkan bahwa tingkat kebisingan yang diperoleh sebesar 92.53 dB untuk pengukuran pukul 09.00 WIB; 92.07 dB pada pengukuran jam 11.00 WIB; dan sebesar 92.01 dB untuk pengukuran pada jam 14.00. Dengan memahami pola kebisingan ini, rekomendasi dan langkah-langkah mitigasi diajukan, termasuk penggantian peralatan, perbaikan isolasi suara, perubahan dalam penjadwalan pekerjaan, serta edukasi dan pelatihan. Penelitian ini memberikan dasar yang kuat untuk mengelola dan memahami kebisingan di bengkel praktik, dengan harapan menjadikannya lingkungan yang lebih aman dan nyaman bagi semua yang berinteraksi di dalamnya.