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All Journal Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Jurnal Abdi Insani G-Tech : Jurnal Teknologi Terapan Jurnal Pengabdian Mandiri Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Teknik AMATA
Mickael Ruben Kaiway
Universitas Cenderawasih
Religion Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemistry 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 Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Public Health Social Sciences Other

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Laboratory-Scale Production of Charcoal from Acacia Wood Tendinus Werenengga; Joni Joni; Selyus Rantepulung; Mickael Ruben Kaiway
G-Tech: Jurnal Teknologi Terapan Vol 9 No 4 (2025): G-Tech, Vol. 9 No. 4 October 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v9i4.8146

Abstract

This study aims to analyze the production of charcoal from acacia wood (Acacia spp.) as a sustainable energy alternative, considering the depletion of fossil fuel reserves and the abundance of acacia biomass in Indonesia. The carbonization process was conducted through slow pyrolysis for 5 hours using a 12-kg gas cylinder reactor with used oil as fuel, and 1.8 kg of acacia wood pieces (5 cm in diameter, 5 cm in length) as raw material. The results showed a charcoal yield of 38.89% (0.7 kg), which is higher than the conventional range of 25–35%. Proximate analysis, based on estimates and supporting literature, indicated a moisture content of approximately 3%, volatile matter of 18%, ash content of 4%, and fixed carbon of 75%, meeting the SNI 01-1683-1989 standard for high-quality charcoal. Stable temperature distribution during the process ensured optimal decomposition of hemicellulose, cellulose, and lignin, producing charcoal with high calorific value and low emissions. These findings confirm the potential of acacia wood as an environmentally friendly charcoal feedstock, with recommendations for further optimization of temperature in the range of 400–600 °C to enhance production efficiency and reduce reliance on unsustainable forest resources.
Evaluasi Kemampuan Produksi Serta Match Factor Alat Gali Muat Cat 390D Dan Alat Angkut OHT Cat 775F Pada Pengupasan Overburden Tambang Batubara PT. Bara Alam Utama Kabupaten Lahat Sumatera Selatan Vhalentio Pakombong; Evellyne Binsyowie Sandhiya Mandosir; Mickael Ruben Kaiway; Agustinus Giai
Jurnal Teknik AMATA Vol. 7 No. 1 (2026)
Publisher : Politeknik Amamapare

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55334/jtam.v7i1.351

Abstract

Kegiatan penambangan PT. Bara Alam Utama  pada penelitian ini difokuskan di Pit Barat dengan target produksi batubara yang direncanakan adalah 87.416,66 ton atau 2.819,90 ton/hari dan pada pengangkutan overburden direncanakan sebesar 303.833,33 m3 atau 9.801,08 m3/hari dengan menggunakan 2 unit alat muat Excavator Caterpillar 390D dan tiap unitnya menggunakan 4 unit OHT Caterpillar 775F sebagai alat angkut ke disposal yang berjarak  ± 2,5 km. Berdasarkan data aktual yang diolah maka diperoleh waktu edar (cycle time) untuk alat muat 0,40 menit dengan efisiensi kerja 50% dan 18,36 menit dengan efisiensi kerja 69% untuk alat angkut, sehingga diperoleh produksi overburden untuk alat muat adalah 217.596,80 m3/bulan dan produksi untuk alat angkut adalah 156.986,00 m3/bulan, MF ( match factor) = 0,5 (MF < 1) berarti pada keadaan ini menunjukkan bahwa alat muat mempunyai waktu tunggu dan alat angkut bekerja penuh, dimana target produksi belum tercapai.  Dengan adanya evaluasi perhitungan data diperoleh efisiensi kerja untuk alat muat 85% dengan waktu edar 0,40 menit dan efisiensi kerja untuk alat angkut 85% dengan waktu edar 16,45 menit. Dimana produksi untuk alat muat adalah 528.431,20 m3/bulan dan 308,460 m3/bulan untuk alat angkut dari front penambangan di Pit Barat ke disposal, sehingga target produksi yang tadinya direncanakan dapat terpenuhi
LATEX APPLICATION TRAINING FOR THESIS WRITING: A COMMUNITY SERVICE INITIATIVE FOR DEIYAI DORMITORY STUDENTS IN JAYAPURA, PAPUA Agustinus Giai; Mickael Ruben Kaiway; Joni Joni; Pither Palamba; Selyus Rantepulung; Vhalentio Pakombong
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 10 No. 2 (2026): JUNI
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v10i2.3498

Abstract

This study describes a community service initiative for undergraduate students at the Deiyai Dormitory in Jayapura, Papua, that aims to improve academic writing skills through LaTeX training. A one-day intensive training program utilizing a practice-based technique was attended by 26 individuals who had never used LaTeX before. Document structure, mathematical formatting, figures and tables, cross-references, and BibTeX were all covered in the training materials. 100% of participants successfully produced simple LaTeX documents, surpassing the 80% goal (+20%), according to the results. However, only over 30% were proficient in creating thesis templates and BibTeX, falling short of the expectations of 60% (−30%) and 70% (−40%). The goal of ≥40 (−35%) was not met by participation (26). In terms of access, the dual-platform concept was validated by the fact that 38% utilized computers and 62% used smartphones via Overleaf. Two completed assignments (goal ≥5) and a learning community with more than thirty participants and more than ten talks over a three-month period were among the post-training outcomes. These findings show a significant short-term increase in fundamental skills, but they also demonstrate the need for continuous interventions and long-term training for advanced competencies.
Design and Energy-Economic Evaluation of a Pellet-Solar Heating System for Single-Family Houses using DIN EN 12831 in Wagete-Papua Agustinus Giai; Ruben Mickael Kaiway; Joni Joni; Samuel Siregar
G-Tech: Jurnal Teknologi Terapan Vol 10 No 3 (2026): G-Tech, Vol. 10 No. 3 July 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i3.10474

Abstract

This study presents the design and thermal analysis of a heating and ventilation system for a residential single-family house located in Wagete, Kabupaten Deiyai, Provinsi Papua Tengah, Indonesia, using the calculation procedures specified in DIN EN 12831. The design heating load was calculated to be 6,560 W, comprising transmission heat losses of 4,232 W, ventilation losses of 1,097 W, and an additional reheating capacity of 1,231 W. A pellet boiler (ETA Pellets Unit 7, 2.3–7.7 kW) combined with a flat-plate solar thermal system (4 collectors, total absorber area 9.4 m²) was selected as the heat generation system. Underfloor heating was designed for all rooms using wet-screed pipe systems (Variotherm, 16 mm aluminum composite pipes), supplemented by wall-mounted radiators in the bathroom (248 W) and shower (38 W). The annual heat demand was determined to be 17,756 kWh/a, with the solar system contributing 4,935 kWh/a (27.8%). Annual CO₂ emissions were estimated at 4,283 kg/a. The system complies with all requirements of the Energieeinsparverordnung (EnEV, 2014) and the Erneuerbare-Energien-Wärmegesetz (EEWärmeG, 2014), with a specific transmission heat loss of H'T = 0.29 W/(m²·K), well below the 0.4 W/(m²·K) limit. The methodology presented here provides a systematic, replicable framework for residential building energy system design in temperate climates, with direct relevance for energy system planning in remote highland communities in Papua Tengah, Indonesia.
Uncertainty-Quantified Grid-Convergence Analysis of RANS Turbulence Models for 2-D Incompressible Backward-Facing Step Flow in OpenFOAM Mickael Ruben Kaiway; Joni; Agustinus Giai; Samuel Parlindungan Siregar; Enos Tambing; Obia Pius
Advance Sustainable Science Engineering and Technology Vol. 8 No. 1 (2026): November - January
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i1.2390

Abstract

A concise evaluation of Reynolds-Averaged Navier–Stokes (RANS) turbulence modeling for two-dimensional, incompressible, steady backward-facing step (BFS) flow at Re = 1000–3000 was conducted using OpenFOAM’s SimpleFoam solver with the standard k–ε model. A tri-level mesh enhancement (coarse, medium and fine) was implemented, and ambiguity was measured utilizing the Convergence Ratio (CR) and Grid Convergence Index (GCI). The fine grid (CR = 0.54; GCI = 0.0059%) was the only configuration exhibiting monotonic convergence, ensuring valid GCI estimation. Results showed reattachment length increasing from 0.11 m to 0.12 m, with stronger vortical structures and steeper shear gradients at higher Re. This study uniquely integrates RANS model validation with grid-uncertainty quantification, providing guidance for mesh optimization and reliable turbulence modeling in BFS simulations.
Co-Authors Agustinus Agustinus Agustinus Giai AKBAR SILO Allo Sarira Pongsapan Anastasia Sri Werdhani David Mangallo Endang Hartiningsih Enos Tambing Evellyne Binsyowie Sandhiya Mandosir Griapon, Nourish Hesti Maria Loisa Msiren Johni J Numberi Joni Karapa, Enos Manalu, Janviter Marthen Liga Mega Fatimah Rosana Nourish Christin Griapon Obia Pius Oktavianus Kati Patabang, Djuarensi Pither Palamba Pither Palamba Pither Palamba Ranteallo, Obet Rombe Allo Rumar, Kristofel Safanpo, Apolo Samuel Parlindungan Siregar Selyus Rantepulung Siregar, Samuel Syilius Rantepulung Tendinus Werenengga Thomas Pagasis Tosuli, Yohanis Tangke Vhalentio Pakombong Vhalentio Pakombong Wambrauw, Oscar O. Werdani, Anastasia Sri Werdhani, Anastasia Sri Yakobus Kariongan Yane Oktovina Ansanay Yohanis Tangke Tosuli Yohanis Wanane Yohanis Yulius Wanane