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All Journal Jurnal Pendidikan Matematika Universitas Lampung JURNAL JPSD (Jurnal Pendidikan Sekolah Dasar) AKSIOMA: Jurnal Program Studi Pendidikan Matematika Pedagogik : Jurnal Ilmiah Pendidikan dan Pembelajaran Fakultas Tarbiyah Unversitas Muhammadiyah Aceh Jurnal Penelitian LPPM (Lembaga Penelitian dan Pengabdian kepada Masyarakat) IKIP PGRI MADIUN AlphaMath: Journal of Mathematics Education Edu Sains: Jurnal Pendidikan Sains dan Matematika Jurnal Rekayasa Mesin Eduma : Mathematics Education Learning and Teaching Elementary: Jurnal Ilmiah Pendidikan Dasar Raheema DIDAKTIKA TAUHIDI: JURNAL PENDIDIKAN GURU SEKOLAH DASAR Jurnal Pendidikan Matematika Raflesia Premiere Educandum: Jurnal Pendidikan Dasar dan Pembelajaran GUIDENA: Jurnal Ilmu Pendidikan, Psikologi, Bimbingan dan Konseling Jurnal Cendekia : Jurnal Pendidikan Matematika MAJU : Jurnal Ilmiah Pendidikan Matematika JSHP (Jurnal Sosial Humaniora dan Pendidikan) JKPM (Jurnal Kajian Pendidikan Matematika) HUMANISMA : Journal of Gender Studies Laplace : Jurnal Pendidikan Matematika Jurnal Fundadikdas (Fundamental Pendidikan Dasar) Adi Widya: Jurnal Pendidikan Dasar Equals : Jurnal Ilmiah Pendidikan Matematika J-PiMat : Jurnal Pendidikan Matematika Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Journal of Mathematics Education and Science Hipotenusa: Journal of Research Mathematics Education (HJRME) Jurnal Inovasi Pembangunan HUMANISMA : Journal of Gender Studies
Suherman
Universitas Islam Negeri Raden Intan Lampung
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Public Health Social Sciences Transportation Other

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Journal : Jurnal Rekayasa Mesin

 1 
Pengaruh Perbedaan Jumlah Katalis terhadap Angka Yield pada Proses Pembuatan Biodiesel dari Minyak Goreng Sisa Menggunakan Pemanas Double Jacket Suherman, Suherman; abdullah, ilmi; Sabri, Muhammad; Silitonga, Arridina Susan; Suroso, Bekti
Jurnal Rekayasa Mesin Vol 17, No 1 (2022): Volume 17, Nomor 1, April 2022
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v17i1.3148

Abstract

Biodiesel is biodegradable and non-toxic and has a low carbon content, high lubricity, and Biodiesel is biodegradable and non-toxic and has a low carbon content, high lubricity, and higher ash point than diesel. The purpose of this study was to obtain data on the physicochemical properties of biodiesel from waste cooking oil (WCO) produced with different amounts of catalyst in the transesterification process. Methods This research carried out a two-step process: (1) esterification with an acid catalyst (H2SO4) and (2) transesterification with an alkali catalyst (KOH). The remaining frying oil is degummed by adding 2% H3PO4. Furthermore, the esterification process was carried out by adding 2% (v/v) H2SO4 at 800 rpm for 90 minutes. The transesterification process using an alkaline catalyst (KOH) was varied from 0.7-1.5% at a temperature of 60 oC with a rotation of 800 rpm and a time of 90 minutes. In the ester/transesterification process, the ratio of methanol: oil is 1:2 (v/v). The biofuels are then tested for cetane number, flash point, density, viscosity, calorific value, and others. The results showed that the amount of wet catalyst (KOH) in the transesterification process gave a difference in the yield of WCO oil. The optimum value was obtained at the amount of 1% KOH catalyst, which was 85%.
Kajian Eksperimental pada Turbin Screw Archimedes Skala Kecil Rahmawaty, Rahmawaty; Suherman, Suherman; Dharma, Surya; Sai'in, Ali
Jurnal Rekayasa Mesin Vol 17, No 1 (2022): Volume 17, Nomor 1, April 2022
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v17i1.3065

Abstract

The number of rivers and canals in most parts of Indonesia is large enough to be developed into a micro-hydro power plant. The Archimedes srcew turbine (Archimedes scew turbine AST) has been implemented to convert hydroelectric energy since the 1990s. Many variables affect the performance of Archimedes screw turbines such as pitch ratio, immersion rate, water flow and turbine shaft angle. The purpose of this study was to determine the effect of the turbine shaft inclination angle (25-35o) on the rotation, current and voltage produced by the screw turbine. The screw turbine has a diameter of 260 mm with a shaft length of 1200 mm and a pitch distance of 200 mm. The flow rate of water is used at 0,0065 m3/s to rotate a low speed generator. The results showed that the higher the turbine shaft angle resulted in an increase in rotation, voltage and current produced. The optimum angle is obtained at a turbine angle of 35o which produces 2,058 Watts at 243 rpm.
Co-Authors Aan Subhan Pamungkas Abdullah, Ilmi Achi Rinaldi Agus Jatmiko Akbar Handoko Amiruddin Amiruddin Andika Eko Prasetiyo Ani Listianingsih Anisatus Sa'adah Anisatus Saadah Anita Rahayu Pamintaningsih Arridina Susan Silitonga - Ayu Sekarsari Suharno Bambang Sri Anggoro Defriyanto Defriyanto, Defriyanto Desi Cahya Nurul Putri Dian Widi Astuti Diki Irwandi Eka Patmi Seta Eka Sakti Yudha Eka Widiyasari Eko Kuswanto Fadhil, Ahmad Fahkur Setiaji Farida, Farida Fauziyyah, Isya Feriansyah Feriansyah Fredi Ganda Putra Hariz Arifai Hasan Sastra Negara Holidun Holidun Holidun, Holidun Iip Sugiharta Istihana Istihana Kamandoko Kamandoko Khusnul Hamidah KOMARUDIN Kurniati, Nadiya Laila Puspita M. Syaif Amrullah Alqusyairi Mardiyah Masykur, Rubhan Mu'min Firmansyah Muhammad Sabri Muhammad Sholeh Muhammad, Fadhil Mujib Mujib Nanang Supriadi Nandang Rusmana Netriwati Nirva Diana Nova Nindarti Novi Rosmawati Novia Dwi Rahmawati Novia Dwi Rahmawati Nur Sa’adah Nuriza Siregar Okis Fatimah Oktavia Irma Pratama Pratama, Oktavia Irma Purwoko, Agus Rahma Sari Ningtias Rahmawaty, Rahmawaty Raisa, Zarul Ratna Wati Revani Husain Setiawan Rifky Hidayat Rizki Wahyu Yunian Putra Rosida Rakhmawati Rubhan Masykur Ruhban Masykur Safitri, Julia Dwi Sai'in, Ali Sari Arfina Silvi Riswati Siti Anggi Wulandari Sofwan Zulfikar Suherman Suherman Suroso, Bekti Surya Dharma Suyadi, Suyadi Syamsul Huda Syofnidah Ifriyanti Taza Nur Utami Teguh Yunianto Tia Agnesa Utami, Taza Nur Yovi Imeysa