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All Journal Teknik Mesin "TEKNOLOGI" Piston: Jurnal Teknologi
Achmad, Muhammad Iqbal
Unknown Affiliation
Aerospace Engineering Automotive Engineering Industrial & Manufacturing Engineering Mechanical Engineering Physics

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Analisis Struktur Mikro Al-Alloy pada Proses Pengecoran Menggunakan Cetakan Pasir dengan Variasi Temperatur Tuang Syarif, Afdal; Achmad, Muhammad Iqbal
Teknik Mesin "TEKNOLOGI" Vol 21, No 1 Okt (2020): Jurnal Teknik Mesin TEKNOLOGI
Publisher : Universitas Negeri Makassar

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Abstract

Sruktur Mikro memiliki peranan penting dalam pengecoran logam maupun non logam, guna melihat struktur dari material coran. Dengan metode cetakan pasir dan variasi temperatur tuang dapat dilihat semakin tinggi temperatur tuang maka struktur butir berbentuk dendrit. Namun dengan penambahan unsur Fe yang berlebihan dari unsur Si akan membuat nilai kekerasan semakin meningkat hasil coran menjadi getas, ini diakibatkan tidak homogennya unsur paduan Al-Alloy seperti yang terlihat dalam foto struktur dan XRFKata Kunci : . Pengecoran, aluminium, paduan, struktur mikro
Analisis Kebutuhan Energi dari Minyak Goreng Bekas menjadi Bahan Bakar Biodiesel B40, B60, dan B80 menggunakan Kompor Minyak Bekas Atina, La; Syarif, Afdal; Achmad, Muhammad Iqbal; Baride, La; Ashari, Dedy
Piston: Jurnal Teknologi Vol 10 No 1 (2025): June 2025
Publisher : Program Pendidikan Vokasi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55679/pistonjt.v10i1.109

Abstract

Stoves that use used oil as fuel are widely used as a tool to utilize liquid waste such as oil into fuel. The aim of this study is focused on comparing the energy requirements and efficiency of various fuels sourced from used cooking oil through transesterification. This research utilizes used cooking oil as an alternative fuel using a used oil stove. Waste cooking oil is processed into biodiesel fuel through a transesterification process into three variations, B40, B60, and B80. Testing of fuel variations on used oil stoves showed that the energy requirement value for B40 fuel had a higher value (0.27 kcal/second) than B60 fuel (0.22 kcal/second) and B80 fuel (0.18 kcal/second). The results shown for the combustion efficiency of B40 fuel have a higher average value (18.9%) than B60 fuel (17.2%) and B80 fuel (14.9%). This shows that the percentage of transesterification results of a mixture of used cooking oil and diesel fuel that is increasing, is seen to experience a decrease in the value of energy requirements and combustion efficiency. The highest combustion efficiency value is found in B40 fuel which has a mixture percentage of 40% transesterification oil and 60% diesel fuel. There was a decrease in combustion efficiency of 8.9% from B40 fuel to B60 fuel, and a decrease in combustion efficiency of 21.2% from B40 fuel to B80 fuel.
Co-Authors Ashari, Dedy Atina, La Baride, La Syarif, Afdal