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All Journal Rotasi Jurnal Engine: Energi, Manufaktur, dan Material Sylva: Jurnal Ilmu-ilmu Kehutanan
Deni Mulyana
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Agriculture, Biological Sciences & Forestry Humanities Control & Systems Engineering Economics, Econometrics & Finance Energy Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Investigasi Efisiensi Propeler Kapal Ikan Tradisional Mulyana, Deni; Jamari, Jamari; Ismail, Rifky
ROTASI Vol 16, No 4 (2014): VOLUME 16, NOMOR 4, OKTOBER 2014
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (748.226 KB) | DOI: 10.14710/rotasi.16.4.28-34

Abstract

Kapal ikan tradisional biasanya dibuat dari kayu dan dengan pola kapal yang diperoleh secara empiris sebagai warisan turun-temurun tanpa diketahui nilai hambatan kapalnya. Adapun sistem propulsi kapal ikan tradisional saat ini biasanya menggunakan propeler sebagai pendorong kapal. Pemilihan propeler biasanya hanya berdasarkan kesediaan di pasaran dan kecocokan dengan shaft kapal yang dipakai, tanpa memperhatikan faktor hambatan kapal sebagai pertimbangan pemilihan propeler. Penelitian ini bertujuan untuk menginvestigasi nilai hambatan kapal ikan tradisional serta mengetahui kinerja propeler yang terpasang sehingga dapat diketahui apakah pemilihan propeler kapal yang terpasang di kapal sudah baik atau tidak. Jenis kapal ikan yang diteliti adalah kapal ikan jenis purse seine di perairan Tegal. Pengambilan data mencakup ukuran utama kapal serta ukuran utama propeler yang terpasang. Kemudian dilakukan pemodelan kapal, estimasi hambatan kapal, dan estimasi efisiensi propeler yang terpasang pada kapal dengan mengasumsikan bahwa propeler kapal merupakan tipe B-series. Efisiensi open water propeler terpasang akan dibandingkan dengan efisiensi open water propeler yang dirancang dengan menggunakan perangkat lunak. Dari pengolahan data didapatkan bahwa nilai hambatan kapal diprediksi sebesar 3.08 kN pada kecepatan kapal 7 knot. Efisiensi open water propeler terpasang sebesar 0.478 sedangkan propeler hasil perhitungan perangkat lunak mempunyai efisiensi open water sebesar 0.546. Ini menunjukkan bahwa pemilihan propeler yang terpasang pada kapal ikan tradisional yang diteliti masih kurang baik
WATERBIRD POPULATION ANALYSIS ON THE BANYUASIN PENINSULA SPTN REGION II REGION BERBAK AND SEMBILANG NATIONAL PARKS, BANYUASIN REGENCY Mulyana, Deni; Aluyah, Cik; Heptiana, Erta
Sylva : Jurnal Penelitian Ilmu-Ilmu Kehutanan Vol 10, No 2 (2021)
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/sylva.v10i2.3946

Abstract

Waterbirds are migratory birds with the largest number in the world who always migrate to a place/region.. This study aims to determine the types and population of migratory and residents waterbirds(waders)  on the Semenanjung Banyuasin SPTN region II Berbak and Sembilang National Parks, Kabupaten Banyuasin This study uses the Point Transect method, the number of bird populations is recorded directly and through estimates using the Block method. Based on observations, it was found that there were 3.743 water birds consisting of 3.240 migrant species and 503 resident species. From this number, after being identified, it is known that there are 20 species of migratory waterbirds and 11 species of resident waterbirds.
Optimization of Cutting Parameter CNC Wet Milling Process of Austenitic Stainless Steel on Surface Roughness Hata, Achmad; Widiatmoko, Rudy Yuni; Mulyana, Deni; Azmy, Ilham
Jurnal Engine: Energi, Manufaktur, dan Material Vol. 7 No. 2 (2023)
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v7i2.1591

Abstract

Austenitic stainless steel (SS) is widely used in various industries owing to its good mechanical properties and corrosion resistance. However, the machineability of this material remains a challenge to measure for better application. In this research, the optimization of the machining parameter CNC wet milling process for austenitic stainless steels (AISI 304 and AISI 316) was successfully finished by utilizing the Taguchi method (S/N ratio and ANOVA) to determine its machineability specifically on surface roughness. The optimum surface roughness of AISI 304 stainless steel is about 0,21 µm within a spindle speed of 3184 rpm, a feed rate of 1528,4 mm/min in the depth of 0,3 mm. The depth of cut parameter during CNC milling was considered as the most influential parameter to optimize surface roughness in AISI 304 stainless steel. Meanwhile, during the cutting process of AISI 316 stainless steel, the optimum surface roughness was obtained at a spindle speed of 3184 rpm, feed rate of 541,4 mm/min in the depth of 0,3 mm with a surface roughness value of 0,24 µm. The results depicted that feed rate held a pivotal factor in determining surface roughness in the AISI 316 stainless steel milling process. Therefore, this research gives impactful insight into developing a good milling process that can increase the machineability, quality, and productivity of AISI 304 and AISI 316 stainless steels.
Co-Authors Aluyah, Cik Hata, Achmad Heptiana, Erta Ilham Azmy J. Jamari Rifky Ismail Widiatmoko, Rudy Yuni