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All Journal JoMMiT : Jurnal Multi Media dan IT Journal of Renewable Engineering
Sihombing, Roland
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Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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Performance and Emission Assessment of Tree-Based Biofuel Additives in Compression Ignition Engines: A Review Ilmi , Ilmi; Sitorus, Tulus Burhanuddin; Siagian, Parulian; Sihombing, Roland
Journal of Renewable Engineering Vol. 3 No. 1 (2026): JORE - February
Publisher : Pt. Anagata Sembagi Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62872/89zh4557

Abstract

This study reviews the performance and emissions of compression ignition (CI) engines using Calophyllum inophyllum (CIME/tamanu)-based biofuel additives through a narrative review of the latest international literature. Inclusion criteria encompassed CI engine test studies reporting efficiency metrics (BTE, BSFC) and key emissions (CO, HC, NOx, smoke/PM) for CIME blends (B10–B100) both without and with additive/mitigation strategies. In general, compared to diesel, CIME reduced CO, HC, and smoke/PM, with a trade-off increase in NOx. The addition of oxygenated additives (e.g., n-pentanol, dimethyl carbonate) and ignition improvers (e.g., DTBP) tends to improve combustion quality, reduce BSFC, and suppress CO/HC; while the application of approximately 10% EGR effectively reduces NOx with a moderate penalty on HC/CO/smoke. Nano-additives (graphene/MWCNT) show potential for increasing BTE and reducing smoke, but present issues of dispersion stability and safety/environment. The most balanced performance generally occurs at low–medium blends (≈B10–B20) combined with oxygenated additives and EGR-based NOx control, accompanied by proper injection calibration. From a sustainability perspective, C. inophyllum—as a non-food source with high FFA pretreatment requirements—has the potential to support transportation decarbonization, although industrial-scale success depends on supply chains, policies, and LCA/TEA results. Further studies are recommended on real-world test cycles, long-term durability, aftertreatment compatibility, and comprehensive environmental assessment.
Sistem Point of Sale pada Warkop Pardapa dengan Fitur Pembayaran dan Laporan Keuangan Septanto, Henri; Sihombing, Roland
JoMMiT Vol 9 No 2 (2025): Artikel Jurnal Volume 9 Issue 2, Desember 2025
Publisher : Politeknik Negeri Media Kreatif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46961/jommit.v9i2.1664

Abstract

Pencatatan transaksi dan pengelolaan stok masih dilakukan secara manual merupakan masalah yang dihadapi Warkop Pardapa. Pemilik kesulitan melacak kemajuan bisnis mereka secara langsung untuk itulah penelitian ini bertujuan untuk mengembangkan sistem Point of Sale (PoS) berbasis web yang memiliki fitur pembayaran dan laporan keuangan sebagai solusi untuk membantu mengelola bisnis dengan lebih baik dan lebih akurat. Proses pembangunan perangkat lunak menjadi lebih mudah dengan metode pengembangan sistem Waterfall. Observasi dan wawancara dengan pemilik bisnis dilakukan sebagai proses pengumpulan data dalam penelitian ini. Sistem yang dibuat tidak hanya memungkinkan pencatatan transaksi dan manajemen stok, tetapi juga memungkinkan pemilik untuk mengakses laporan tentang stok dan penjualan setiap saat. Hasil dari penelitian ini adalah sebuah Sistem Point of Sale (PoS) yang berguna untuk membantu pemilik dalam mengelola usaha mereka dengan lebih baik dan mengurangi kesalahan pencatatan yang terkadang terjadi secara manual. Sistem ini menjadi solusi digital yang membantu pertumbuhan usaha kecil seperti Warkop Pardapa.
Co-Authors Henri Septanto, Henri Ilmi , Ilmi Siagian, Parulian Tulus Burhanuddin Sitorus