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All Journal INOVTEK POLBENG The Spirit of Society Journal : International Journal of Society Development and Engagement International Journal of Marine Engineering Innovation and Research Journal of Mechanical Engineering, Science, and Innovation
Mohammad Basuki Rahmat
Politeknik Perkapalan Negeri Surabaya
Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Other

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Numerical Study of The Power Plant Surface Condenser to Prevent High Pressure in Critical Areas Eky Novianarenti; Ary Bachtiar Khrisna Putra; Setyo Nugroho; Arrad Ghani Safitra; Rini Indarti; Priyambodo Nur Ardi Nugroho; Mohammad Basuki Rahmat
Journal of Mechanical Engineering, Science, and Innovation Vol 1, No 2 (2021): (October)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1205.835 KB) | DOI: 10.31284/j.jmesi.2021.v1i2.2317

Abstract

A numerical study to reduce the condenser pressure in critical areas of a power plant surface condenser has been carried out. Numerically, effects are considered through a three-dimensional simulation approach. Modifying by adding a guide plate with a three variation of angle, (?) 15?, 30?, 45? in the surface condenser area to reduce the dynamic forces and pressure due to the collision of fluid flow in the critical pipeline without reducing the purpose of the design of shell and tube heat exchanger results in transferring heat. The drag force caused by the interaction of the shear layer with the surface of the body is very undesirable, so that the control of the flow fields is needed, one of which is by optimal angle guide plate of the pipe arrangement in the critical area. This study aims to determine the optimal plate angle to overcome high pressure in the critical area. This research was numerically conducted using 3D CFD ANSYS 14.5 software with a turbulence model using a standard k-? using a pressure-based solution solver. The initial stage takes geometric data on the surface condenser in the design specification as the basis for making the domain and data from before as boundary conditions in the simulation research process. The result is that with the addition of guide plates, the average drag coefficient (Cd) is reduced compared to the average Cd in the baseline conditions and angle variation (?) 15?, 30?, 45? is 0.537; 0.644; 0.446; 0.464. Taking into this aspect, the most optimal plate angle is 30?. The simulation results show that changing the angle of the plate can reduce the Nusselt value than the baseline conditions.
Desain Hybrid Panel Surya Dan Generator Set Pada Kapal Ikan Pesisir Selatan Jawa Purwidi Asri; Hendro Agus Widodo; Anggara Trisna Nugraha; Isa Rachman; Mohammad Basuki Rahmat; Joessianto Eko Poetro; Ivan Azwar S; Habibi Ahmad B; Dewi Rizani Ruwahida
INOVTEK POLBENG Vol 12, No 1 (2022): INOVTEK VOL.12 NO.1 2022
Publisher : POLITEKNIK NEGERI BENGKALIS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35314/ip.v12i1.2387

Abstract

Sumber energi penggerak kapal merupakan salah satu faktor yang menjadi perhatian. Penggunaan BBM (solar) yang merupakan hasil olahan minyak bumi sangat terbatas dan dapat habis sewaktu-waktu, karena itu diperlukan sumber energy baru untuk mengurangi ketergantungan BBM. PLTS mejadi salah satu sumber energi pada kapal untuk menurunkan pemakaian BBM. Pemakaian energi surya dapat mengurangi emisi udara. PLTS pada kapal juga menghemat biaya bahan bakar kapal dan menjaga kelestarian ekosistem laut. Dengan menggunakan PLTS maka dapat mengurangi pemanasan global yang mengakibatkan suhu laut menghangat yang dapat merusak ekosistem laut. Dalam penelitian kali ini kapal ikan yang dirancang adalah kapal ikan 3GT dengan kecepatan 12-15 knot dan menggunakan panel surya dengan spesifikasi 1000Wp sebanyak 2 buah. Kelebihan daripada panel surya yang dirancang ini adalah dilengkapi dengan penambahan beberapa komponen diantaranya seperti Charge Controller yang merupakan peralatan elektronik untuk mengontrol pengisian dan pengosongan baterai. Solar charge controller mengatur agar tidak terjadi overcharging dan overvoltage yang dapat mengurangi umur baterai. Baterai merupakan komponen yang berfungsi memberikan daya kepada beban ketika modul surya tidak dapat menyediakan daya keseluruhan pada beban, dan menyimpan kelebihan daya yang dihasilkan oleh modul surya. Kapal ikan ini dilengkapi dengan beberapa alat penunjang lainnya seperti fishfinder, radar, AIS dsb.
Implementation Adaptive Decision Feedback Equalizer for Time-Reversal Communication in Shallow Water Environment Yuning Widiarti; Mohammad Basuki Rahmat
THE SPIRIT OF SOCIETY JOURNAL : International Journal of Society Development and Engagement Vol 6 No 1: September 2022
Publisher : LPPM of NAROTAMA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29138/scj.v6i1.2037

Abstract

Underwater wireless communications are growing very fast along with human needs for applications such as defense, state security, underwater control and monitoring systems. Until now, an acoustic signal is a practical way to achieve long distance communication in the ocean. However, the underwater acoustic channel faces many challenges including limited available bandwidth, long delays, time-variability, and Doppler-spread. These challenges can reduce the reliability of the communication system and the achievement of high data-rate becomes a challenge. Adaptive decision feedback equalization is a method to compensate for the distortion of information signals on the underwater acoustic channel. On the other hand, time reversal is an effective method of overcoming intersymbol interference (ISI) problems which is the effect of multipath phenomena in underwater channels. Spatial focusing on time reversal can reduce the co-existing system disturbances and its temporal focusing makes the received power concentrated within a few taps so that the equalizer design work becomes much simpler. The temporal focusing can also increase the transmission rate. This paper shows that the combination of time reversal and adaptive DFE (TR-DFE) has superior performance than TR and DFE itself. By modifying the step-size parameters in the adaptive DFE, the TR-DFE level of convergence and performance can be improved. The geometry-based modeling which is used proves that distance and multipath variation greatly affect the quality of time reversal communication on the underwater acoustic channel.
Corrosion Detection on Ship Hull Using ROV Based on Convolutional Neural Network Yuning Widiarti; Edy Setiawan; Hendra Aldi Prasetiyo; Budianto Budianto; Imam Sutrisno; Adianto Adianto; Mohammad Basuki Rahmat
International Journal of Marine Engineering Innovation and Research Vol 9, No 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i1.17235

Abstract

The Remotely Operated Underwater Vehicle (ROV) has several inspection functions. One of them is the inspection function for hull damage. The damage that often occurs in the hull is corrosion. The corrosion can cause a decrease in the strength of the hull plate, reduce the speed of the ship, and decrease the quality of the safety level of ships and passengers. This study aims to classify the level of corrosion intensity on ship hulls by implementing a Convolutional Neural Network (CNN). Identification is carried out on images taken by underwater cameras via a Remotely Operated Vehicle (ROV). The intensity of the area affected by corrosion is identified so that the level of corrosion intensity can be classified and it can be considered that the ship needs maintenance to prevent even greater losses due to corrosion. The dataset used is 240 image data divided into 3 classification categories: low, medium, and high corrosion intensity. The accuracy of the real-time testing of the CNN method on the dataset plate when conditions outside the water reached 91.1% and on the dataset plate when conditions underwater reached 86.6%. 
Co-Authors Adianto Adianto Anggara Trisna Nugraha Arrad Ghani Safitra Ary Bachtiar Khrisna Putra Asri, Purwidi Budianto Budianto Dewi Rizani Ruwahida Edy Setiawan Eky Novianarenti Habibi Ahmad B Hendra Aldi Prasetiyo Hendro Agus Widodo Imam Sutrisno Ivan Azwar S Joessianto Eko Poetro Priyambodo Nur Ardi Nugroho Rini Indarti Setyo Nugroho Yuning Widiarti, Yuning