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Pengaruh Aspek Rasio Terhadap Perubahan Tekanan Dan Koefisien Kerugian Fluida Pada Diffuser Silinder Thomas Pagasis
Jurnal Teknik Mesin Sinergi Vol 7, No 2 (2009): Oktober 2009
Publisher : Politeknik Negeri Ujung Pandang

Penelitian ini dilakukan untuk mengatasi kerugian tekan atau penurunan tekanan, dengan mengubah aspek rasio dan kerampingan suatu diffuser. Model eksperimen diuji pada sebuah terowongan angin subsonic di Laboratorium Mekanika Fluida Teknik Mesin Universitas Hasanuddin, dengan cara menguji (diffuser) disambung dengan terowongan yang dibuat berdasarkan aspek rasio (AR = 3, AR = 4, AR = 5 dan AR =6), yang diuji dengan variasi pembukaan katup. Hasil penelitian menunjukkan bahwa perubahan aspek rasio dan kerampingan dapat mempengaruhi perubahan tekanan dan koefisien kerugian tekan, dimana semakin besar aspek rasio (AR) dan kerampingan (L/D1) suatu diffuser silinder maka perubahan tekanan dan koefisien kerugian tekanan akan semakin besar pada berbagai bilangan Reynolds dan nilai optimum aspek rasio yang dihasilkan pada AR = 3.

PELATIHAN PENGEMBANGAN PLTMH BERBASIS MASYARAKAT MANDIRI Djuarensi Patabang; Thomas Pagasis
JURNAL PENGABDIAN PAPUA Vol 1, No 1 (2017)
Publisher : LPPM Uncen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/.v1i1.395

The community service was conducted at the Laboratory of the Faculty of Engineering, Cenderawasih University. The topics is The Development Training of "MHP Community-Based Self", given the potential for development of renewable energy sources potential so desperately needs a good knowledge of how business can be done to develop the potential utilization of renewable energy, especially the MHP as electricity generator spread in Papua based society. The approach offered in this activity is to provide an overview of activities that will be implemented in the development of electrical energy (MHP) based independent community. Implementation of these activities are done through training and simulation in the field how to ultimately determine the location of micro hydro power plants, and utilization of energy available in the location to be effective and efficient in their utilization, especially for the development of home industries in the villages. It is hoped this activity will produce a group of people who can develop electrical energy independent community-based MHP and produced a training module for community service learning development of micro hydro power plant (MHP). The impact of this activity can form a community of skilled, creative, innovative and independent as well as increased utilization of new and renewable energy, especially in the field of micro hydro power plant as well as the needs of the community on electrical energy can be addressed and their efforts in the community independent produktivities.Keywords: Papua, MHP, energy, produktivities

Characteristics of Multi-tier Hybrid Dryer for Drying Corn Grains Allo, Rombe; Pongsapan, Allo Sarira; Mangallo, David; Agustinus; Siregar, Samuel Parlindungan; Pagasis, Thomas; Werdhani, Anastasia Sri; Numberi, Johni Jonatan; Palamba, Pither; Banda, Dionisius Desriadi; Joni
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa & Inovasi Volume 6 Nomor 2 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i2.6370

The type of drying device known as a hybrid dryer is a tool that harnesses solar energy and the heat generated by a biomass fuel-powered heat exchanger. This study was conducted to assess the performance of the hybrid dryer by analyzing the parameters of the device itself and the dried material. The research was carried out experimentally using a solar collector and a biomass furnace (as a heat exchanger) to heat the air. The solar collector used consists of 0.35 mm thick, black-painted zinc, coated with 5 mm thick glass, and installed at a 20-degree angle. The heat exchanger pipe used has a diameter of 1.25 inches and is made of galvanized pipe. The tested sample is corn seeds with an initial moisture content of about 24.6%. The experimental results show that in the drying process using a solar dryer, the initial moisture content of 24.8% was successfully reduced to 14% at 5.50 h (rack 1), 6.50 h (rack 2) and 7.00 h (rack 3) with a thermal efficiency of 24.25%. Meanwhile, in the hybrid drying process, the required time is approximately 5.00 h (rack 1), 5.50 h (rack 2) and 6.00 h (rack 3), with a efficiency of the drying equipment used is 21.048±5.690% (hybrid) and 22.706±6.437% (solar).

Analisis Pengaruh Arus Listrik dan Elektroda Terhadap Kekuatan dan Kekerasan pada Proses Pengelasan SMAW Baja Karbon Rendah Enos Tambing; Thomas Pagasis; Obet Takke Ranteallo; David Mangallo; Samuel Parlidungan Siregar; Agustinus Agustinus
G-Tech: Jurnal Teknologi Terapan Vol 8 No 2 (2024): G-Tech, Vol. 8 No. 2 April 2024
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/gtech.v8i2.4070

The Shielded Metal Arc Welding (SMAW) process, a common method in electric arc welding, is the focus of this research. The study utilizes low carbon steel plates with variations in electrode diameters. The primary objectives are to evaluate the strength of the welding outcomes and analyze the hardness levels in each zone of the subjected workpiece. Employing an experimental approach, low carbon steel plates are selected, cut with a V-groove, and joined using the SMAW electric welding technique. Data collection involves tensile testing, macroscopic observations of specimens post-tensile testing, and hardness testing in three welding zones. Research findings indicate that the heat generated by the electric current significantly impacts the changes in strength and hardness levels in all three welding zones. The highest tensile strength is achieved with a welding current of 120 A, and hardness testing reveals variations in each zone. The base metal (BM) exhibits the highest hardness levels in welding with 80 A current and a 2.6 mm electrode diameter, while the Heat-Affected Zone (HAZ) shows maximum hardness in specimens with a 120 A current and a 3.2 mm electrode diameter. The Weld Metal (WM) area attains the highest hardness level in specimens with a 120 A electric current and a 3.2 mm electrode diameter.

PROCESSING CORN COB WASTE AS AN ALTERNATIVE FUEL USING CARBONIZATION AND BRIQUETING PROCESSES Agustinus, Agustinus; Tambing, Enos; Mangalo, David; Joni, Joni; Pagasis, Thomas; Allo, Elisabet Payung
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 8 No. 1 (2024): MARET
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v8i1.2269

The potential natural resources of Keerom Regency, Arso District, especially in the agricultural sector, are very abundant. Corn cob waste produced by farmers is a loss if it is not converted into something more useful. Corn cobs contain cellulose, hemicellulose, and lignin. This content will later be converted into smaller molecules through various treatments to be used as energy. This service aims to provide knowledge and skills to the farming community, on how to process corn cob waste as solid fuel or briquettes. The results of proximate testing or the composition of corn cob briquettes carried out in the Unhas Animal Husbandry Laboratory showed that at the highest temperature of 100oC, fixed carbon was obtained at 39.7, and at the lowest temperature of 60oC, fixed carbon was at 41.3. This can be stated as the amount of carbon contained in the remaining material after the volatile matter has been removed. Likewise, the higher the fixed carbon value, the quality of the corncob briquettes increases. Thus, the highest energy or heat pattern obtained is 5933 cal/gr, so corn cob briquettes can be used as briquette fuel energy. Utilizing corn cobs as fuel for briquettes can reduce dependence on fuel oil and can be used as a home industry business.

THE APPLICATION OF BIOMASS STOVES AMONG THE BERKAT RAMA FARMER GROUP IN BIBIOSI VILLAGE, ARSO DISTRICT, KEEROM REGENCY Pongsapan, Allo Sarira; Allo, Rombe; Mangallo, David; Pagasis, Thomas; Palamba, Pither; Joni, Joni; Rantepulung, Selyus; Membala, Semuel Boron; Tambing, Enos; Siregar, Samuel Parlindungan; Kariongan, Yakobus; Mangopo, Dultudes; Kati, Oktavianus
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 8 No. 4 (2024): DESEMBER
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v8i4.2512

This community service activity aims to introduce biomass stoves to communities in need, particularly those with abundant biomass waste. The biomass stove's performance has already been evaluated through prior research conducted on campus. This community service initiative will be carried out with the Berkat Rama farmer group in Bibiosi Village, a major corn production area near Cenderawasih University in Arso District, Keerom Regency. Based on preliminary site assessments, local farmers reported significant quantities of agricultural waste, specifically corn cobs, left after harvest. This waste has not been optimally utilized by farmers and is typically disposed of by burning. Motivated by this, our community service team from the Department of Mechanical Engineering at Cenderawasih University aims to introduce corn cob-fueled biomass stoves to the local community. The Community Service Program (PKM) was met with strong enthusiasm from participants, who actively engaged in the socialization session through to its conclusion. The community expressed a desire for more frequent activities of this kind to broaden their knowledge and skills, especially regarding appropriate technology applications. The final outcome of this community service is an increase in both knowledge and skills among members of the Berkat Rama farmer group, specifically in the fabrication and operation of the introduced biomass stoves. They also received training in operational safety for biomass stoves. The acquired knowledge and skills are expected to be applied and shared with other community members and farmers in the area.

APPLICATION OF MECHANICAL CORN SHELLING MACHINE TO THE CORN FARMING COMMUNITY OF BIBIOSI VILLAGE ARSO SWAKARSA DISTRICT KEEROM DISTRICT Pagasis, Thomas; Mangallo, David; Allo, Rombe; Tambing, Enos; Rantepulung, Selyus; Kaiway, Mickael Ruben
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 9 No. 1 (2025): MARET
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v9i1.2605

The application of corn shelling machine technology aims to increase the productivity of partner farmers in Bibiosi Village, Keerom Regency so that they can improve their welfare. The target to be achieved is the adoption of corn shelling technology which works mechanically by the target community, increasing corn shelling production and community income, as well as establishing intensive cooperation between Cenderawasih University as the producer and developer of appropriate technology, the community using the technology and the local government. The method used to achieve this goal is by providing a technological touch to the community in processing corn harvests so that corn production can be optimized through the mechanical shelling process of corn. Application of appropriate technology in the form of a corn shelling machine using a petrol motor with 5.5 HP power. Based on the performance test results, this corn shelling machine has a production capacity of 1000 kg/hour. This is expected to help corn farmers to produce shelled corn more quickly and save energy. The application of appropriate technology will have an impact on the welfare of the community in the community partnership program. Apart from that, the application of science and technology is a solution for farmer groups in building insight and mindset in society.

Analysis of Corn Cob Briquette Characteristics Using Different Adhesives in the Pyrolysis Process David Mangallo; Thomas Pagasis; Rombe Allo; Mickael Ruben Kaiway; Enos Tambing; Selyus Rantepulung
G-Tech: Jurnal Teknologi Terapan Vol 9 No 2 (2025): G-Tech, Vol. 9 No. 2 April 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/gtech.v9i2.6635

Corn cobs, an abundant agricultural waste, represent a promising alternative energy source when converted into briquettes. This study aimed to characterize corn cob briquettes and determine the optimal adhesive type and concentration for enhanced performance. Charcoal was produced from corn cobs via pyrolysis in repurposed oil drums, then ground and sieved through a 60-mesh screen. The resultant charcoal was combined with either starch or sago starch adhesives at concentrations of 7.5%, 10%, 12.5%, and 15% and subsequently molded into honeycomb briquettes using a 4-inch diameter mold with 16 perforations, fabricated from galvanized iron pipes and operated with a hydraulic jack. Proximate analysis indicated moisture levels of 5.37–6.71%, ash levels of 30.64–39.16%, volatile matter levels of 20.61–23.07%, fixed carbon proportions of 32.53–42.44%, and calorific values between 2893 and 3727 kcal/kg. A Water Boiling Test conducted with 1 liter of water demonstrated that briquettes incorporating 7.5% sago starch adhesive achieved boiling within 36 minutes, indicating superior combustion efficiency. These findings confirm the potential of corn cob briquettes as a renewable energy source and underscore the critical role of adhesive formulation in optimizing biomass fuel performance.

Characteristics of Multi-tier Hybrid Dryer for Drying Corn Grains Rombe Allo; Allo Sarira Pongsapan; David Mangallo; Agustinus; Samuel Parlindungan Siregar; Thomas Pagasis; Anastasia Sri Werdhani; Johni Jonatan Numberi; Pither Palamba; Dionisius Desriadi Banda; Joni
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 6 Nomor 2 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i2.6370

The type of drying device known as a hybrid dryer is a tool that harnesses solar energy and the heat generated by a biomass fuel-powered heat exchanger. This study was conducted to assess the performance of the hybrid dryer by analyzing the parameters of the device itself and the dried material. The research was carried out experimentally using a solar collector and a biomass furnace (as a heat exchanger) to heat the air. The solar collector used consists of 0.35 mm thick, black-painted zinc, coated with 5 mm thick glass, and installed at a 20-degree angle. The heat exchanger pipe used has a diameter of 1.25 inches and is made of galvanized pipe. The tested sample is corn seeds with an initial moisture content of about 24.6%. The experimental results show that in the drying process using a solar dryer, the initial moisture content of 24.8% was successfully reduced to 14% at 5.50 h (rack 1), 6.50 h (rack 2) and 7.00 h (rack 3) with a thermal efficiency of 24.25%. Meanwhile, in the hybrid drying process, the required time is approximately 5.00 h (rack 1), 5.50 h (rack 2) and 6.00 h (rack 3), with a efficiency of the drying equipment used is 21.048±5.690% (hybrid) and 22.706±6.437% (solar).

PENERAPAN MESIN PERONTOK BIJI JAGUNG BAGI MASYARAKAT PETANI JAGUNG KAMPUNG BIBIOSI KABUPATEN KEEROM Thomas Pagasis; David Mangallo
Panrita Inovasi: Jurnal Pengabdian Kepada Masyarakat Vol 5, No 1 June 2026
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56680/pijpm.v5i1.82948

The primary challenge in post-harvest corn handling among farmers in Bibiosi Village, Keerom Regency, is the continued use of manual shelling tools, which are time-consuming and labor-intensive, resulting in delayed sales and reduced corn quality. To address this issue, appropriate technology in the form of a gasoline-powered mechanical corn sheller (5.5 HP) was introduced to improve processing efficiency and productivity. The program aimed to increase farmers’ shelling capacity, enhance income, promote technology adoption, and strengthen collaboration among Cenderawasih University, the local community, and the local government. The implementation method included machine fabrication, equipment installation, operational and maintenance training, and evaluation. Performance testing demonstrated that the machine has a production capacity of 350 kg per hour. The application of this technology significantly improves post-harvest efficiency and contributes to increasing farmers’ productivity and welfare. Furthermore, the program fosters technological awareness and encourages a more progressive mindset within the farming community.

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