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All Journal Jurnal Pengabdian Kompetitif Jurnal Polimesin
Annisa Wulan Sari
Universitas Riau
Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Hydrogen enriched combustion in a small spark-ignition engine using a NaOH-based alkaline electrolyzer: experimental evaluation at 0.5 kg/cm² brake load Suci Rahmadhani Irawan; Ahmad Ilham Wicaksono; Annisa Wulan Sari; Awaludin Martin
Jurnal Polimesin Vol 24, No 3 (2026): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i3.8784

Abstract

The increasing concern over greenhouse gas emissions from fossil fuels has driven the exploration of hydrogen as a clean energy source. However, the practical application of hydrogen in internal combustion engines is still limited by the stability of on-demand hydrogen production systems and their integration with conventional engines. This study aims to design and evaluate a NaOH-based alkaline electrolyzer for on-demand hydrogen production and its application in a small spark-ignition engine. The electrolyzer was fabricated using 8 cell stacks with electrode dimensions of 16×16 cm, an inter-electrode gap of 2 mm, and a thickness of 1.2 mm. Experimental tests were conducted at currents of 40 A and 50 A with 30 wt.% NaOH solution. The produced hydrogen gas was directly supplied to a 97cc spark-ignition engine under a constant braking load of 0.5 kg/cm². The result showed that hydrogen production reached 0.9 L/min at 40 A and 1.25 L/min at 50 A. The addition of hydrogen significantly improved engine performance, with brake power increasing by up to 20.8%, brake thermal efficiency by 6.2%, and volumetric efficiency by 9.1%, while reducing brake specific energy consumption by 28%. These findings indicate that hydrogen generated from an alkaline electrolyzer can enhance combustion efficiency and improve overall engine performance, supporting the development of cleaner and more efficient energy systems.
EVALUASI KAPASITAS PRODUKSI DAN IDENTIFIKASI KEBUTUHAN PENGEMBANGAN MESIN LEMANG BERBASIS VOICE OF CUSTOMER Anggraini Dwi Saputri; Anita Susilawati; Awaludin Martin; Feblil Huda; Dinni Agustina; Yogie Rinaldy Ginting; Herisiswanto Herisiswanto; Annisa Wulan Sari; Dedy Masnur; Putri Nawang Sari; Ari Andriyas Puji; Dodi Sofyan Arief; Yohanes Yohanes
Jurnal Pengabdian Kompetitif Vol. 5 No. 1 (2026): Jurnal Pengabdian Kompetitif (JPK)
Publisher : Komunitas Manajemen Kompetitif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35446/pengabdiankompetif.v5i1.2931

Abstract

The implementation of the Closed Rotary Lemang Baking Machine at Rumah Lemang MSME in Pekanbaru improved burning time efficiency by 50%–62.5% per batch. However, field evaluation revealed a critical capacity gap: machine capacity (10 bamboo/batch) was significantly lower than traditional production capacity (40 bamboo/batch), resulting in lower actual throughput (6–7 bamboo/hour vs. 10–13 bamboo/hour) and reduced daily output (20–30 vs. 40 bamboo). This study analyzed this gap through throughput analysis and identified second-generation machine requirements using Voice of Customer (VoC). Methods included in-depth interviews with the MSME owner, production performance measurement, and comparative gap analysis. VoC results identified an ideal capacity of 50 bamboo/batch, with the owner already planning an independent modification as an indication of active technology adoption. This study recommends an iterative development approach with modular second-generation machine specifications grounded in real user needs.
Co-Authors Ahmad Ilham Wicaksono Anggraini Dwi Saputri Anita Susilawati Ari Andriyas Puji Awaludin Martin Dedy Masnur, Dedy Dinni Agustina Dodi Sofyan Arief Feblil Huda Ginting, Yogie Rinaldy Herisiswanto Herisiswanto Putri Nawang Sari Suci Rahmadhani Irawan Yohanes Yohanes