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All Journal G-Tech : Jurnal Teknologi Terapan
Agustinus Agustinus
Universitas Cenderawasih, Indonesia
Computer Science & IT Decision Sciences, Operations Research & Management Energy Engineering

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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

Abstract

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.
Optimization of Hole Variations in Honeycomb Charcoal Briquettes from Corn Waste for Enhanced Combustion Efficiency Agustinus Agustinus; Rombe Allo; Enos Tambing; Selyus Rantepulung; Mickael Ruben Kaiway
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.v9i2.6639

Abstract

This study investigates the viability of corn byproducts as an alternative energy source via conversion into honeycomb charcoal briquettes. Discarded corn byproducts are transformed into briquettes to mitigate fossil fuel reliance, particularly in the Arso region. This research aims to assess the energy output of briquettes with varying perforation configurations (4, 8, and 12 holes) and a diameter of 5 inches. The Water Boiling Test (WBT) method, utilizing temperature measurement tools such as a K-type thermocouple and an infrared thermometer, was utilized for performance assessment. One liter of water was heated to its boiling point during the experiment. The results indicated that the 8-hole briquette had the quickest boiling time of 25 minutes, with a fuel consumption rate of 2.8 × 10⁻³ kg/s. In comparison, the 4 and 12-hole briquettes required 35 minutes, with an average fuel usage of 2.86 g/s. The maximum combustion temperature for the 4-hole briquette was measured at 589°C, while the 12-hole briquette reached a mere 427°C. These outcomes demonstrate that the 8-hole briquette possesses superior efficiency. A decrease in hole quantity adversely affects boiling speed, while an increase in holes results in greater fuel consumption. These findings highlight the importance of optimized briquette design in improving biomass fuel efficiency.
Optimisasi rekayasa proses dan validasi parameter pengukuran di stand uji pengeringan biomassa Agustinus Giai; Mickael Ruben Kaiway; Joni Joni; Agustinus Agustinus; Samuel Siregar; Syilius Rantepulung; Anastasia Sri Werdhani
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.v9i2.6818

Abstract

This research is motivated by the need for the efficiency of the biomass solid fuel drying process in existing dryer installations. This study aims to optimize the insulation on the primary and secondary sides of the spiral heat exchanger and validate the electrical power on the heater register and the heat flow measured by the system. The approach used was the application of a mixture of 25 ml ISO PUR K 760 and 100 ml ISO-PUR K760 Härter (ISO-ELEKTRA Elektrochemische Fabrik GmbH) and the comparison of thermal and electrical power results calculated using temperature difference data between the inlet and outlet of the heater register without readings in a PC regulator. Experiments were conducted with constant parameters, i.e. target temperature 50°C, fan power level 7, and compressor electricity consumption 541 W. This study proves that after sealing the spiral heat exchanger, there is an increase in energy consumption efficiency. In addition, the approach based on temperature difference in calculating heat power can improve the accuracy in observing energy in the biomass drying system.
Co-Authors Agustinus Giai Anastasia Sri Werdhani David Mangallo Enos Tambing Joni Mickael Ruben Kaiway Ranteallo, Obet Rombe Allo Samuel Parlindungan Siregar Selyus Rantepulung Syilius Rantepulung Thomas Pagasis