Article Per Year (5 Year)
p-Index From 2020 - 2025
1.325
P-Index
This Author published in this journals
All Journal Indonesian Physical Review International Journal of Marine Engineering Innovation and Research Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Jurnal Bluefin Fisheries Jurnal Airaha Prosiding Seminar Nasional Teknologi Industri Berkelanjutan
Ahmad Ilham Ramadhani
Politeknik Kelautan dan Perikanan Bitung
Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture 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

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 Documents
Search

 1 
EFFECT OF CALCINATION TEMPERATURE ON F-DOPED LiFePO4 CATHODE MATERIAL ON FORMATION OF OLIVINE PHASE Ahmad Ilham Ramadhani; Lukman Noerochim; Diah Susanti; Eli Novita Sari
Indonesian Physical Review Vol. 4 No. 3 (2021)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v4i3.99

Abstract

Olivine single phase of LiFePO4 was successfully synthesized by solid-state reaction (SSR) method through the formation of Fe2P2O7 from precursors of Li2CO3, F2O3, NH4H2PO4, and LiF as materials doping. Variations at temperatures of calcination 670 0C, 700 0C and 750 0C with doped 0.1F. TGA-DSC test results show that the LFP sample undergoes decomposition in the temperature range 0-600 0C. The olivine phase formed at temperatures of more than 650 0C and the oxidation process on the LiFePO4/C sample was completed, and the sample mass was constant. The olivine phase formed was determined by comparing the 2???? value obtained through characterization with the ICDD LFP (01-081-1173), and accordingly with experiment. The increase of the temperature results from a dominant LFP phase with a larger grain size. The effect of increasing the calcination temperature at 0.1F has resulted in an enlargement of the particle size.
PENGARUH KOMPOSISI CU-ZN TERHADAP TINGKAT KEKERASAN DAN STRUKTUR MIKRO ALUMINIUM DIE CASTING (ADC) 12 SEBAGAI BAHAN PROPELLER Ahmad Ilham Ramadhani; Barokah Barokah; Fahriadi Pakaya; Jozua Ch. Huwae; Marinus S. Tappy; Andie Murtono; Ahmad Tubagus Tsani Risqi Aji
JURNAL BLUEFIN FISHERIES Vol 3, No 2 (2021)
Publisher : Politeknik Kelautan dan Perikanan Bitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (386.352 KB) | DOI: 10.15578/jbf.v3i2.114

Abstract

Propeller is one of the important components of a ship. Generally, propellers are made of aluminum which is easily damaged when hit by waves and corrosion. The development is done by adding brass (Cu-Zn) on ADC 12. The sample was successfully made with a ratio of 70% ADC 12 : 30% Cu-Zn using the casting method and then cooled at room temperature followed by die casting and sand casting processes. The sample was tested for hardness using the Rockwell method according to the ASTM E18 standard and the microstructure test on the sample. Based on the test results obtained an average hardness level of 72.6 HRC and the formation of Al-Si-Mg, α-Al, Cu, Zn in the sample which shows the distribution of non-ferrous material in ADC-12. Keywords : ADC 12; Cu-Zn; propeller; microstructure; hardness
Analisa Kekuatan Tarik dan Kekuatan Impact Propeller Alumunium Die Casting (ADC) 12 dengan Penambahan Cu-Zn Ahmad Ilham Ramadhani; Barokah Barokah; Fahriadi Pakaya; Jozua Ch. Huwae; Marinus S. Tappy; Andie Murtono; Ahmad Tubagus Tsani Risqi Aji
Jurnal Airaha Vol 11 No 01: June 2022
Publisher : Politeknik Kelautan dan Perikanan Sorong, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (483.642 KB) | DOI: 10.15578/ja.v11i01.320

Abstract

Propeller kapal nelayan umumnya terbuat dari aluminium yang mudah mengalami kerusakan pada saat dihantam batu karang, ombak dan mengalami korosi. Maka dilakukan pengembangan dengan penambahan kuningan (Cu-Zn) terhadap material propeller ADC 12. Spesimen berhasil dibuat dengan penambahan 30% Cu-Zn pada ADC 12 dengan menggunakan metode pengecoran yang dilanjutkan pencetakan dengan metode die dan sand casting. Spesimen ADC 12 dan paduan ADC 12+CuZn diuji tarik dan impak sesuai standard ASTM E8 dan ASTM E23 untuk mengetahui perubahan sifat mekanik material tersebut. Berdasarkan hasil pengujian tarik diperoleh bahwa adanya unsur Cu-Zn menurunkan kekuatan tarik ADC 12 (141 MPa) dan paduan ADC 12+CuZn (55,1 Mpa). Hasil pengujian kekuatan impact menunjukkan tingkat kekuatan impact kekerasan rata-rata ADC 12 (15,61 joule) dan paduan ADC 12+CuZn (15,98 joule).
Studi Pengaruh Jenis Minyak Nabati terhadap Campuran Bioresin Vinil ester-Minyak Nabati Eli Novita Sari; Ahmad Ilham Ramadhani; Jauharotul Maknunah
Prosiding SENASTITAN: Seminar Nasional Teknologi Industri Berkelanjutan Prosiding SENASTITAN Vol. 01 2021
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (551.973 KB)

Abstract

Minyak nabati merupakan alternatif untuk mengganti minyak mineral dan bahan kimia, karena minyak nabati bersifat biodegradable, tidak beracun, ramah lingkungan, dan dapat diperbarui. Penelitian ini akan mengembangkan bioresin yang merupakan campuran dari polimer vinil ester dengan polimer alam berupa minyak nabati. Hasil dari pengujian bioresin dengan variasi minyak nabati yang meliputi minyak sawit, minyak kelapa, minyak kedelai, dan minyak wijen didapatkan hasil bahwa bioresin vinil ester dengan pengisi minyak sawit (VE-MS) dan minyak wijen (VE-MW) memiliki properti teroptimum. Nilai kekerasan VE-MS 76 HD dan VE-MW 75 HD, nilai kekuatan tarik VE-MS 42 Mpa dan VE-MW 45 Mpa, nilai pertambahan panjang VE-MS 24% dan VE-MW 20%, nilai kekuatan tekuk VE-MS 73 Mpa dan VE-MW 89 Mpa, massa jenis VE-MS 1,004 g/cm3 dan VE-MW 1,003 g/cm3.
Prototipe Perahu Listrik: Pengaruh Ukuran Propeller Terhadap Resistance dan Power Pada Software Maxsurf Resistance Ahmad Ilham Ramadhani; Dwi Dharma Arta Kusuma; Andie Murtono; Ahmad Tubagus Tsani Risqi Aji
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 4, Nomor 3, Edisi November 2023
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.v4i3.30775

Abstract

The boat model as a prototype of an electric boat has been successfully modeled and simulated using Maxsurf software. The research aims to determine the resistance and power values of the boat when operating using the Holtrop method. The Pakura boat was modeled using a Maxsurf modeler and simulated using Maxsurf resistance. Based on the modeling results, it shows that the boat model corresponds to the main dimensions in real conditions. The Pakura boat model has a displacement of 320.5 kg, amidship and immersed draft of 0.25 m, and a wetted area of 2.94 m2. The resistance and power are calculated using the resistance and power holotrop methods. Based on the simulation results, we obtained a prototype model of an electric boat that can operate on a certain propeller size. The maximum speed of the electric boat prototype with a 7-inch propeller is 4.31 kn. At 1500 rpm, the boat receives an HR of 92.71 N and requires a power of 205.57 W. On an 8-inch propeller that is 4.82 kN. At 1500 rpm, the boat receives an HR of 121.83 N and requires a power of 302.08 W. The size of the propeller affects the resistance value and power of the boat. The resistance value of the boat and operating power requirements increase along with changes in rpm on the electric engine. This can be used as a reference in determining the propulsion components for an electric boat prototype.
Evaluation Prototype of B30 Diesel Fuel Heater Using Arduino Parabelem Tino Dolf Rompas; Metsi Daud; Ahmad Tubagus Tsani Risqi Aji; Barokah Barokah; Dwi Dharma Arta Kusuma; Ahmad Ilham Ramadhani
International Journal of Marine Engineering Innovation and Research Vol 9, No 4 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i4.21905

Abstract

Utilizing B30 as diesel fuel has the advantage of being heated to a specific temperature. Manually setting the temperature during the heating and fuel-filling process in the heating tank causes fuel performance to become less effective and efficient. This research aims to evaluate the capability of the prototype as a B30 fuel heater. The research method was carried out experimentally by testing variables for the temperature sensor (DS28B20), distance sensor (VL53LOX), heater control system, fuel filling system, and performance of the B30 diesel fuel heater prototype on a 7 HP single-cylinder diesel engine. The research results show that the fuel heater prototype can regulate the desired temperature and fill the heating tank automatically. The fuel temperature tested starts from 280C to 650C with an average multiple of 50C and tolerances of +20C and -10C. At the same time, it can automatically fill fuel from the main tank to the heating tank set from 800 ml to 1200 ml. B30 performance on a 7 HP single-cylinder diesel engine with 100 ml of fuel heated at 280C - 650C each shows the longest fuel consumption time at 350C and the fastest at 450C.
Co-Authors Ahmad Tubagus Tsani Risqi Aji Ahmad Tubagus Tsani Risqi Aji Andie Murtono Barokah Diah Susanti Dwi Dharma Arta Kusuma Eli Novita Sari Jauharotul Maknunah Jozua Ch. Huwae Lukman Noerochim Marinus S. Tappy Metsi Daud1 Pakaya, Fahriadi parabelem tinno dolf rompas