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All Journal Jurnal Teknologi Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Turbo : Jurnal Program Studi Teknik Mesin
Ahmad Yudi Eka Risano
Jurusan Teknik Mesin Universitas Lampung, Bandar Lampung Jl. Prof. Sumantri Brojonegoro No.1 Bandar Lampung 35145
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Mechanical Engineering Medicine & Pharmacology Other

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Journal : Turbo : Jurnal Program Studi Teknik Mesin

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The influence of friction stir welding tool shape on quality of AZ31 Magnesium welding product Irza Sukmana; Fauzi Ibrahim; Ahmad Yudi Eka Risano
TURBO [Tulisan Riset Berbasis Online] Vol 10, No 2 (2021): Jurnal TURBO
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i2.1728

Abstract

Magnesium is one type of material that can be used as a base metal in welding. Magnesium has superior properties, including low density, good ductility, medium strength and excellent corrosion resistance. Because of its properties, the metal is widely used, ranging from household goods to aircraft components. These base metals are categorised as mild when viewed from the specific gravity of magnesium (1.74 g/cm3 and 1.83 g/cm3). Welding is the process of merging two or more base metals which are merged at the contact surface with or without additives or fillers. Welding is divided into two main categories, Liquid and Solid-State Welding. Friction Stir Welding (FSW) is an example of Solid-State Welding (Non-Fusion Welding). FSW is a friction welding process that twists the tool by utilising heat energy and pressing without additives or fillers until the base metal is in a phase change.  The welding process in this study used the cone and spiral shape with a tool rotation at 2000 rpm and a welding speed of 16 mm/min. The tests carried out are tensile and hardness testing. This study found that the tool shape, tool rotation, and welding speed significantly affect the mechanical properties of the welded AZ31 magnesium. The spiral shape will make the welding area wider. Although the cone shape will have a small area, the weld will look perfect with good tensile strength, while the hardness values for the two tool shapes are almost the same, but the cone shape is better.
Pengaruh Filter Udara Berbahan Zeolit dan Fly ash Teraktivasi HCl-Fisik terhadap Prestasi Mesin Sepeda Motor 4 Langkah Herry Wardono; Abdul Aziz; A Yudi Eka Risano
TURBO [Tulisan Riset Berbasis Online] Vol 8, No 1 (2019): Juni 2019
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (271.375 KB) | DOI: 10.24127/trb.v8i1.923

Abstract

Menurut Direktur Jendral Minyak dan Gas Bumi (MIGAS) Kementrian Energi dan Sumber Daya Mineral (ESDM) cadangan minyak Indonesia hanya bisa bertahan hingga tahun 2028. Menanggapi permasalahan tersebut, salah satu cara adalah menghemat penggunaan bahan bakar minyak dengan memanfaatkan fly ash batubara dan zeolit alam sebagai penyaring udara (filter) kendaraan. Zeolit dan fly ash memiliki kemampuan menangkap uap air dan gas nitrogen dalam udara, sehingga proses pembakaran menjadi lebih sempurna dan meningkatkan prestasi mesin menjadi lebih baik.Di dalam zeolit dan fly ash terdapat zat pengotor sehingga perlu dilakukannya aktivasi HCl untuk membersihkan zat pengotor tersebut. kemudian zeolit dan fly ash dibuat berbentuk bulat dengan ketebalan 3mm dan berdiameter 10mm dan disusun menyerupai bentuk filter asli dari kendaraan motor uji. Temperatur aktivasi fisik (pengovenan) pelet zeolit dan fly ash yang digunakan 150oC, 175oC, 200oC dan 225oC. Konsentrasi kimia yang digunakan normalitas HCl 0,25N, 0,5N, 0,75N, 1N, 1,5N dan 2N. Dengan komposisi zeolit dan fly ash Z0:F100, Z25:F75, Z50:F50, Z75:F25 dan Z100:F0. Penelitian ini menggunakan 4 variasi pengujian yaitu pengujian jalan, pengujian stasioner, pengujian akselerasi dan pengujian emisi gas buang.Filter komposisi terbaik adalah filter Z75:F25 total persentasi sebesar 55,09%. Filter aktivasi kimia HCl terbaik adalah filter 1N total persentasi sebesar 75,74%. Filter temperatur aktivasi fisik (pengovenan) terbaik adalah filter 225oC total persentasi sebesar 58,31%. Pada pengujian emisi gas buang kadar gas CO terbaik filter Z75:F25 1N 225oC sebesar 0,47% pada 2500rpm. Penurunan kadar HC terbaik filter Z75:F25 1N 225oC sebesar 37,3ppm pada 2500rpm dan peningkatan gas CO2 terbaik filter alami 0,84% pada 2500rpm, 0,98% pada 4500rpm.Kata kunci : Filter udara zeolit dan fly ash, aktivasi HCl,Prestasi sepeda motor
PERANCANGAN ULANG ALAT PENGERING BIJI KAKAO TIPE ROTARI SEDERHANA PADA USAHA MANDIRI DI DESA WIYONO KABUPATEN PESAWARAN Ahmad Yudi Eka Risano; Novri Tanti; Maulana Efendi
TURBO [Tulisan Riset Berbasis Online] Vol 6, No 2 (2017): Desember 2017
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (631.607 KB) | DOI: 10.24127/trb.v6i2.602

Abstract

Penelitian ini dilakukan pada alat pengering biji kakao untuk proses pengeringan biji kakao milik Usaha Mandiri di Desa Wiyono, Kabupaten Pesawaran. Penelitian ini bertujuan untuk merancang ulang alat pengering biji kakao tipe rotari sederhana agar proses pengeringan lebih efektif dan didapat kualitas hasil pengeringan biji kakao lebih baik. Perhitungan yang dilakukan meliputi dimensi alat pengering, termal yang terjadi pada alat pengering, dan kebutuhan bahan bakar pada alat pengering biji kakao tipe rotari sederhana, serta dilakukan simulasi pada model alat pengering biji kakao tipe rotari sederhana yang telah dirancang menggunakan Software Autodesk CFD untuk mengetahui sebaran suhu pada model alat pengering yang telah dirancang. Dari hasil penelitian yang telah dilakukan alat pengering biji kakao tipe rotari sederhana ini memiliki dimensi ruang pengering dengan diameter 90 cm, panjang 108 cm, dan tebal 1,2 mm. sebaran suhu pada ruang pengering sebesar 65,06oC , kalor yang dibutuhkan untuk proses pengeringan biji kakao sebesar 1028906,047 KJ, waktu yang dibutuhkan untuk proses pengeringan ± 8 jam 14 menit dan bahan bakar yang dibutuhkan untuk proses pengeringan sebanyak 302,62 kg atau 0,30260 kubik serta sebaran suhu rata-rata hasil simulasi menggunkan Software Autodesk CFD sebesar 63,5116oC. Kata Kunci: kakao, pengeringan, Autodesk CFD, suhu
PEMANFAATAN CAMPURAN ZEOLIT DAN FLY ASH BATUBARAYANG TELAH DIAKTIVASI FISIK TERHADAP AKSELERASI MESIN SEPEDA MOTOR 4-LANGKAH Herry Wardono; Ahmad Yudi Eka Risano; Adi Ernadi
TURBO [Tulisan Riset Berbasis Online] Vol 7, No 1 (2018): Juni 2018
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (506.316 KB) | DOI: 10.24127/trb.v7i1.713

Abstract

Energy consumption in Indonesia is quite high, almost 96% is supplied from fossil fuel ( crude oil 48%, gases 18%, and coal 30%). From the total of energy consumption, it can be seen that almost 50% is gasoline. Thus, it is necessary to attain a certain aim in saving fossil fuel consumption. One of the ways is the utilization of zeolite and coal fly ash mixture as engine air filter. The mixture of zeolite and coal fly ash have a specific ability to trap nitrogen gases and water vapor in air, so that only oxygen enters the combustion chamber. Thus, the combustion process reaches the optimal condition and engine performance works better. Before applying, zeolite and fly ash were mixed with the comparisons of zeolite 0% : fly ash 100%, zeolite 25% : fly ash 75%, zeolite 50% : fly ash 50%, zeolite 75% : fly ash 25%, and zeolite 100% : fly ash 0%. The mixture of zeolite and fly ash was made in the form of pellet and activated physically within the temperature of 100 ºC (naturally), 150 ºC, 175 ºC, 200 ºC, and 225 ºC. Wheres various mass filter used were 50% (13,75 grams), 75% (20,62 grams) and 100% (27,50 grams). The pellets were arranged resemble a filter and place on the case of engine air filter. The purpose of this testing is to find out the effect of temperature activation and the filter mass variations as well as the composition of zeolite and fly ash mixture toward the performance of four step gasoline engine in acceleration testing. The best acceleration achieved is 12,61% (2,41 seconds faster ) taken from the test using filter of Z50:F50 mixture, with mass variation of 100% within temperature of 225 °C.Keywords: Filter of zeolite and coal fly ash,air adsorbent, engine acceleration.
Co-Authors Abdul Aziz Adi Ernadi Ahmad Suudi Amrul Amrul Choirul Anam Fauzi Ibrahim Herry Wardono Herry Wardono Irza Sukmana Maulana Efendi Muhammad Badaruddin Muhammad Irsyad Novri Tanti