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All Journal Turbo : Jurnal Program Studi Teknik Mesin Nozel : Jurnal Pendididikan Teknik Mesin
Rama Abimanyu
Universitas Al-Azhar Medan
Mechanical Engineering

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Analisis Kelayakan Tekno-Ekonomi Menggunakan Metode Net Present Value (NPV) dan Internal Rate Of Return (IRR) pada Konversi Mesin Diesel 1-Silinder ke Biodiesel B20 Berbasis Limbah Minyak Jelantah pada Industri Tahu Skala UMKM Rama Abimanyu
Nozel : Jurnal Pendididikan Teknik Mesin Vol 9, No 2 (2027)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v9i2.123384

Abstract

The reliance of the MSME-scale tofu industry on diesel fuel for single-cylinder diesel engines results in high operating costs and increased exhaust emissions. B20 biodiesel made from used cooking oil is a fuel alternative with the potential to reduce production costs, minimize waste, and support the adoption of renewable energy. This study aims to analyze the techno-economic feasibility of using B20 biodiesel derived from used cooking oil in single-cylinder diesel engines through a Systematic Literature Review (SLR) approach, adhering to the PRISMA principles. The reviewed literature consists of scientific publications from 2019 to 2025 that discuss the performance of diesel engines fueled by B20 biodiesel, the utilization of used cooking oil as a biodiesel feedstock, and technical-economic analyses using Net Present Value (NPV) and Internal Rate of Return (IRR). The results of the study indicate that the use of B20 biodiesel leads to a 1–3% decrease in effective power, a 2–5% decrease in thermal efficiency, and a 5–10% increase in specific fuel consumption. Nevertheless, these changes remain within the operational tolerance limits of SMEs and do not require significant engine modifications. From an environmental perspective, B20 biodiesel reduces CO, HC, and particulate emissions, although there is a tendency for NOx emissions to increase. From an economic perspective, a positive NPV and an IRR of 12–25%, which exceeds the MARR of 9.5%, indicate that converting diesel engines to B20 biodiesel is financially viable. Thus, the use of B20 biodiesel made from used cooking oil can serve as an economical, practical, and sustainable alternative energy solution for the MSME-scale tofu industry.
Pengembangan dan Optimasi Sistem Pendinginan Mesin Pembakaran Internal dengan Penggunaan Material Phase Change Material (PCM) untuk Meningkatkan Efisiensi Bahan Bakar dan Mengurangi Emisi Gas Buang pada Kendaraan Bermotor Zus tian Zustian; Ella Aprilliyah; Rama Abimanyu
TURBO [Tulisan Riset Berbasis Online] Vol 14 No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4306

Abstract

Penelitian ini mengkaji penggunaan Phase Change Material (PCM) dalam sistem pendingin mesin pembakaran internal untuk meningkatkan efisiensi pendinginan, mengurangi buangan gas emisi, dan meningkatkan efisiensi bahan bakar. Hasil penelitian menunjukkan bahwa penerapan PCM dapat mengurangi berat sistem, mempercepat waktu pemanasan, serta meningkatkan efisiensi termal dan kinerja sirkulasi mesin. Teknologi ini juga berkontribusi dalam pengurangan pengurangan bahan bakar dan emisi berbahaya, serta memberikan keuntungan signifikan bagi industri otomotif, termasuk pengurangan biaya perawatan dan perpanjangan umur komponen. Penelitian ini menggunakan simulasi CFD-FEM dan pengujian siklus WLTP dan NEDC untuk menghasilkan analisis yang lebih akurat, yang mengonfirmasi keunggulan PCM dalam sistem pendingin. Dengan aplikasi PCM pada berbagai jenis mesin, penelitian ini menawarkan solusi lebih ramah lingkungan, mengurangi emisi COâ‚‚, dan mengoptimalkan kinerja mesin kendaraan.
Co-Authors Ella Aprilliyah Zus tian Zustian