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All Journal Rekayasa Mesin Media Mesin: Majalah Teknik Mesin Jurnal Rekayasa Mesin Turbo : Jurnal Program Studi Teknik Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Jurnal Teknik Mesin Indonesia KURVATEK Applied Research and Smart Technology (ARSTech) Jurnal Mesin Nusantara Jurnal Pengabdian Multidisiplin Eksergi: Jurnal Teknik Energi Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Daru Sugati
Institut Teknologi Nasional Yogyakarta
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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THE EFFECT OF ADDING BIOETHANOL TO RON 92 GASOLINE ON PERFORMANCE AND EXHAUST EMISSIONS Sugati, Daru; Salim , Amat Agus; Abdulkadir, Muhammad; Efendi , Nizam
Jurnal Rekayasa Mesin Vol. 16 No. 3 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

Processing bioethanol from plants rich in carbohydrates into alternative energy sources is a challenging problem related to providing renewable energy. This paper discusses an experimental study of a spark ignition (SI) engine using a mixture of conventional RON 92 fuel mixed with bioethanol. The aim is to boost engine performance and exhaust emissions caused by bioethanol blended fuels (E5 and E10). An unmodified spark ignition (SI) engine and bioethanol distillation product from sugarcane molasses mixed with conventional RON 92 fuel were used to evaluate engine performance at engine speeds between 2000 and 8000 rpm. The investigation results showed that the mixture of E5 and E10 provided advantages because the oxygen content was higher, thus improving the combustion process. The torque and engine power produced increased by an average of 1.1% and 1.9%. Under the same combustion process conditions, BSFC fuel consumption also decreased by an average of 1% and 2.3%. The mixture of fuel with bioethanol sugarcane molasses can improve the combustion process because it contains a lot of oxygen (O2). The increase in torque and power produced by the engine is not too significant, but overall, it can reduce the content of exhaust emissions of carbon monoxide (CO), carbon dioxide (CO2), and hydrocarbons (HC).
Computational fluid dynamics software based on the artificial compressibility method Yosua Heru Irawan; Daru Sugati; Kristian Hubra Kadu; Syed Ahmad Raza
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 10 No. 2 (2025)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v10i2.42462

Abstract

This study aims to develop a computational fluid dynamics (CFD) software package based on the Artificial Compressibility Method (ACM) for solving incompressible fluid flow problems. CFD is a vital engineering tool that enables numerical simulation of fluid motion. The ACM, introduced to enhance computational efficiency, allows incompressible flows to be simulated similarly to compressible flows, resulting in faster and more stable numerical convergence.  The Finite Volume Method (FVM) was employed to discretize the Navier–Stokes and continuity equations, incorporating an artificial compressibility term. The developed software was validated using two benchmark cases: lid-driven cavity flow and channel flow. In the lid-driven cavity flow test, simulations were conducted at Reynolds numbers (Re) of 100 and 3200, showing excellent agreement with benchmark data from Ghia et al. (1982). For the channel flow case, numerical results were compared with the analytical Hagen–Poiseuille solution for fully developed laminar flow, demonstrating strong consistency. The results indicate that the software accurately reproduces velocity profiles in both laminar and fully developed regimes, while also improving computational speed without compromising accuracy. This development broadens access to CFD technology for a wide range of engineering applications, enabling complex flow analyses with more efficient use of computational resources.
Engineering Design of Vertical and Horizontal Briquette Printing Machines on Briquette Quality Angger Bagus Prasetiyo; Aditya Rahayu; Daru Sugati
Jurnal Mesin Nusantara Vol 9 No 1 (2026): Jurnal Mesin Nusantara
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jmn.v9i1.28318

Abstract

Briket biomassa merupakan salah satu sumber energi terbarukan yang potensial, namun kualitas briket sangat dipengaruhi oleh mekanisme densifikasi dan orientasi gaya tekan yang dihasilkan oleh mesin pencetak briket. Penelitian ini bertujuan untuk menganalisis pengaruh desain mesin pencetak briket tipe vertikal dan horizontal terhadap karakteristik fisik dan mekanik briket biomassa. Penelitian dilakukan secara eksperimental dengan pendekatan komparatif menggunakan campuran biomassa berupa arang sekam padi (40%), arang serbuk kayu (40%), perekat tapioka (10%), dan air (10%). Mesin pencetak tipe vertikal menggunakan sistem pemadatan pneumatic-hydraulic dengan variasi tekanan sebesar 206.842, 344.738, 482.633, dan 620.528 Pa, sedangkan mesin tipe horizontal menggunakan mekanisme screw press yang digerakkan motor listrik 1,5 HP dengan diameter screw 6 cm, panjang screw 26 cm, dan kapasitas produksi 200 kg/jam. Tekanan pemadatan pada mesin horizontal tidak dapat dinyatakan sebagai satu nilai tetap seperti pada mesin vertikal karena mekanisme screw press menghasilkan tekanan dinamis yang berubah secara kontinu selama proses pencetakan. Kualitas briket dianalisis berdasarkan densitas, ketahanan mekanik (drop test), water resistance index (WRI), dan laju pembakaran. Hasil penelitian menunjukkan bahwa peningkatan tekanan pemadatan pada mesin vertikal mampu meningkatkan densitas briket dari 0,551 menjadi 0,731 g/cm³ serta menurunkan persentase kerusakan drop test dari 45,15% menjadi 18,51%. Selain itu, laju pembakaran menurun dari 0,215 menjadi 0,158 g/menit yang menunjukkan terbentuknya struktur briket yang lebih padat dan stabil. Mesin horizontal menghasilkan densitas rata-rata sebesar 0,654 g/cm³ dengan laju pembakaran sebesar 0,175 g/menit serta menunjukkan variasi struktur yang relatif lebih besar. Hasil penelitian menunjukkan bahwa orientasi gaya tekan vertikal menghasilkan distribusi tekanan yang lebih merata dan proses densifikasi biomassa yang lebih efektif sehingga menghasilkan briket dengan kekuatan mekanik dan kestabilan pembakaran yang lebih baik. Penelitian ini memberikan kontribusi ilmiah dalam menjelaskan hubungan antara orientasi gaya tekan, mekanisme densifikasi, dan kualitas briket pada sistem pencetakan biomassa.
Co-Authors Abdulkadir, Muhammad Aditya Rahayu Amat Agus Salim Amat Agus Salim Andriyanto Setyawan Angger Bagus Prasetiyo Ardi, Iwan Aris Warsita Dandung Rudy Hartana Diah Suwarti Widiastuti Didit Setyo Pamuji Edi Susanto Efendi , Nizam Eka Yawara Endik Syah Rival Fal dian Harianto Harianto Hendri Hermawan Adinugraha Kristian Hubra Kadu M. Abdulkadir nopriantoro, sulung Nugroho, Harry Laksono Pra tikto Ratna Kartikasari Salim , Amat Agus Salim, Amat Agus Saputra, Agung Wahyu Solikhah Retno Hidayati Syed Ahmad Raza Yohannes Agus Jayatun Yosua Heru Irawan Yusril Yusril