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All Journal Jurnal Teknik Mesin TEKNIK Rotasi Jurnal Simetris Jurnal Pendidikan Teknologi dan Kejuruan Jurnal Teknosains Rekayasa Mesin EMITTER International Journal of Engineering Technology Media Teknika Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Jurnal Sistem Teknik Industri Sprocket : Journal of Mechanical Engineering Dinamis Sinergi Polmed : Jurnal Ilmiah Teknik Mesin Journal of Community Service in Science and Engineering Journal of Renewable Engineering
Tulus Burhanuddin Sitorus
Departemen Teknik Mesin Fakultas Teknik, Universitas Sumatera Utara, Universitas Sumatera Utara
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation

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Utilization of a Coffee Peeler Machine for Coffee Farmer Groups in Gunung Tua Village Mandailing Natal: Coffee Peeler Machine Sitorus, Tulus Burhanuddin; Nasution, Ahmad Y; Hamsi, Alfian; Lubis, Syaifuddin
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 7 No. 2 (2022): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/abdimastalenta.v7i2.7749

Abstract

Topographically, the Mandailing Natal district is divided into lowland areas which are coastal areas with an elevation of 00 -20 covering an area of ​​160,500 Ha (24.24%). One of the drivers of economic growth in Mandailing Natal district is plantations. Plantation plants in the Mandailing Natal district can develop coffee, cinnamon, coconut, candlenut, sugar palm, and cloves. However, the level of absorption of agricultural technology is still not as expected, especially for coffee farmers in Gunung Tua village, Mandailing Natal Regency, making coffee productivity from this area less than optimal. From the survey results and discussions with coffee farmer partners in the town of Gunung Tua Mandailing Natal, it was found that there were several problems in the post-harvest process, and one of them was the peeling of the coffee bean skin. So far, most coffee farmers use a coffee peeler manually with a 20 kg/hour capacity and require quite a high operational cost. Therefore, the service implementation team and coffee farmer partners agreed to make a 100 kg/hour coffee peeler machine and an electric motor drive based on these conditions. Test data in the field shows that for a coffee peeler with a capacity of 100 kg/hour, only one liter of fuel is needed to peel 400 kg of coffee beans. This, of course, makes a significant reduction in production costs in the post-harvest process. It is hoped that this machine can work optimally to reduce the production cost of coffee peeling and increase the income of coffee farmers in the village of Gunung Tua Mandailing Natal.
Pengaruh Bahan Bakar Biodiesel dari Dimetil Ester Terhadap Kinerja Mesin Diesel Empat Langkah Sitorus, Tulus Burhanuddin; Zebua, Yosua F.S.R; Sinaturi, Daniel F.B; Siagian, Jonathan A.R; -, Suprihatin; Siagian, Lestina
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 3 No 2 (2022): Edisi Februari 2022
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (823.123 KB) | DOI: 10.36655/sprocket.v3i2.649

Abstract

This study aims to determine the effect of biodiesel fuel from dimethyl ester on four-stroke stationary diesel engines' performance and exhaust emissions. Tests were carried out using B10 and B30 fuels with engine speed variations and load variations without modifying the engine. The results showed that the torque, power, and thermal efficiency tended to decrease when using B10 and B30. In addition, the specific fuel consumption has increased when the engine uses B10 and B30. But exhaust emissions of CO and unburned hydrocarbon (UHC) decreased NOx and increased CO2 when the engine uses B10 and B30. This research also obtains the correlations and regression equations involving engine performance parameters.
PERFORMANSI MESIN DIESEL MENGGUNAKAN BIODIESEL DARI CAMPURAN BIJI KARET-MINYAK PIROLISIS LIMBAH PLASTIK-MINYAK SOLAR Sitorus, Tulus Burhanuddin; Tambunan , Bisrul Hapis; Sihombing , Hendrik Voice; Ambarita, Himsar
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1765

Abstract

This research examines the performance of a Diesel engine that uses alternative fuel biodiesel from a mixture of rubber seeds with plastic waste pyrolysis and diesel oil. The plastic waste used is plastic bottle caps, which are processed by pyrolysis to obtain oil. One of the objectives of mixing biodiesel with plastic waste pyrolysis oil is to increase the calorific value of rubber seed biodiesel. The calorific value of rubber seed biodiesel is 39.95 kJ/kg, and the calorific value of plastic waste pyrolysis oil is 46.55 kJ/kg. Mixing rubber seed biodiesel with plastic waste pyrolysis oil increases the calorific value of rubber seed biodiesel by around 9.63%-13.63%. Experimental results show that there is a reduction in exhaust emissions when using biodiesel for opacity of 7.51-66.08%, CO 12.5-50%, HC 7.14-62.96% and an increase in CO2 emissions of around 3.08-84.62%. Tests using biodiesel were carried out without modifying the Diesel engine.
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.
Ocean Clean Energy: Optimizing the Use of Solar Panels to Increase Cooling Storage Efficiency for Fishermen in Sibolga Towards Sustainability and Climate Change Mitigation Sitorus, Tulus Burhanuddin; Yasmine Anggia Sari; Sarah Patumona Manalu; Hendrik Voice Sihombing; Ahmad Yunus Nasution; Mhd Azmy Vizzyansjah Lubis; Ananda El Shaddai Oktavia Siahaan; Muhammad Rizky Maulizar
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 10 No. 2 (2025): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/abdimastalenta.v10i2.18685

Abstract

This community service activity aims to improve fishermen's welfare in Sibolga City by implementing more efficient technology. The main focus is enhancing fresh fish storage efficiency using refrigeration systems that utilize alternative energy. The activities involving faculty and students from the University of North Sumatra include raising awareness about alternative energy, promoting the use of solar panels, and installing them directly on fishing boats at Sibolga Harbor. The results of this initiative demonstrate increased awareness among fishermen about the importance of clean and sustainable energy. It is hoped that this will improve the quality of the catch, reduce operational costs, and contribute to local climate change mitigation efforts.
PENGUJIAN EMISI GAS BUANG MESIN OTTO STASIONER DENGAN BAHAN BAKAR CAMPURAN MINYAK PIROLISIS PLASTIK DAN METANOL Siahaan, Enzo Wiranta Battra; Sitorus, Tulus Burhanuddin; Ambarita, Himsar; Nur, Taufiq Bin; Abdullah, Ilmi; Simanjuntak, Janter Pangaduan
SINERGI POLMED: Jurnal Ilmiah Teknik Mesin Vol. 7 No. 1 (2026): Edisi Februari
Publisher : Politeknik Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51510/sinergipolmed.v7i1.3072

Abstract

Studi ini menganalisis pengaruh penambahan metanol pada minyak pirolisis limbah plastik terhadap emisi gas buang mesin Otto stasioner sebagai upaya meningkatkan kualitas pembakaran bahan bakar alternatif. Penelitian ini bertujuan untuk menganalisis pengaruh fraksi metanol dalam bahan bakar minyak pirolisis limbah plastik terhadap emisi HC, CO, CO₂, O₂, dan nilai lambda pada mesin Otto stasioner serta mengidentifikasi komposisi campuran optimum berdasarkan kinerja emisi. Pengujian dilakukan pada tiga putaran mesin yaitu 1500 rpm, 2000 rpm, dan 2500 rpm dengan parameter emisi yang diukur meliputi HC, CO, CO₂, O₂, dan nilai lambda. Hasil pengujian menunjukkan bahwa campuran 5% metanol dengan 95% pirolisis plastik memberikan performa emisi terbaik, ditandai dengan kadar HC dan CO yang lebih rendah, CO₂ lebih tinggi, serta O₂ yang lebih rendah dibandingkan campuran lainnya. Sementara itu, pada campuran 10% dan 15% metanol terjadi peningkatan emisi HC dan CO serta penurunan CO₂, yang menandakan pembakaran kurang sempurna. Dengan demikian, penambahan metanol dalam jumlah terbatas mampu meningkatkan efisiensi pembakaran dan menekan emisi berbahaya dari mesin Otto stasioner berbahan bakar campuran pirolisis plastik.
Study on Thermoelectric Cooler Driven by Solar Energy in Medan City Sitorus, Tulus Burhanuddin; Lubis, Zulkifli; Ariani, Farida; Sembiring, Ferry
EMITTER International Journal of Engineering Technology Vol 6 No 2 (2018)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1352.369 KB) | DOI: 10.24003/emitter.v6i2.303

Abstract

The primary purpose of this study is to investigate the performance of thermoelectric cooler driven by solar energy in Medan city, Indonesia. This cooler able to use in a remote area where electricity is still not available. The cooler could be used to store beverage that must be stored at low temperatures to maintain the freshness such as drink cup. The solar thermoelectric cooler is based on the principles of a thermoelectric module or Peltier effect to create a hot side and a cold side. The cold side of the thermoelectric module is utilized for cooling purposes to the cooling space. The heat from the hot side of the module is rejected to ambient surroundings by using heat sinks and fans. The solar thermoelectric cooler was experimentally tested for the cooling purpose. Experimental results showed that the solar thermoelectric cooler could reduce the temperature of the drink cup from 26oC to 15oC in approximately 40 min. The maximum COP of the cooling system during the experiment was calculated and found to be about 0.356. The effect of weather conditions on the COP value was about 85.90%.
Co-Authors Abdullah, Ilmi Ahmad Yunus Nasution Alexander, Ryan Alfian Hamsi Ananda El Shaddai Oktavia Siahaan Andi Syahputra Arief Hariyanto David Chandra Elisabeth Ginting Farida Ariani Gabriel Alexandro Sembiring Ginting, Elizabeth Hendrik Voice Sihombing Himsar Ambarita Ilmi , Ilmi Irfandi, Ridha Jaya Arjuna Joi Jogi Pakpahan Lubis, Syaifuddin Manik, Terang U. H. S. G. Manik, Terang U.H.S. Ginting Manik, Terang UHS Ginting Manik, Terang UHSG Mhd Azmy Vizzyansjah Lubis Muhammad Ibrahim Syah Muhammad Reihan Triandhika Muhammad Rizky Maulizar Mulfi Hazwi Nasution, Ahmad Y Nasution, Ahmad Yunus Nur, Taufiq Bin Parulian Siagian Rachmat Kentardjo Sarah Patumona Manalu Sembiring, Ferry Sembiring, Ferry Siagian, Jonathan A.R Siagian, Lestina Siahaan, Enzo W.B Sihombing , Hendrik Voice Sihombing, Roland Simanjuntak, Janter Pangaduan Sinaturi, Daniel F.B Siti Qeisya Puandhani Siregar Situmorang, Mangontang Suprihatin - Syahrul Abda Syahrul Abda Tambunan , Bisrul Hapis Tanadi, Derrick Tania Alda Tekad Sitepu Wiranto Arismunandar Yasmine Anggia Sari Zebua, Yosua F.S.R Zulkifli Lubis