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Journal : Jurnal Teknik Mesin Indonesia

The Effect of Funnel Angle on Density, Hardness, and Calorific Value in Briquette Pressing Machine Ma'a, Mustaza; Syachreffi, Mohammad Ichwan; Novison, Roni; Zaira, Jupri Yanda; Nugroho, Nur Cahya
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v20i1.721

Abstract

Efforts to find new energy sources continue, including Renewable Energy Sources (RES). Biomass is an alternative source of renewable energy and one example of biomass is briquettes. Briquettes are solid fuels made from renewable organic materials derived from plants such as mangrove wood, coconut shells, and palm kernel shells. Thus, briquettes can serve as an alternative energy source to replace fossil fuels like coal. In this study, briquettes were produced using a briquette pressing machine with a screw conveyor method. The briquette materials used were palm kernel shell charcoal dan mangrove wood charcoal, with variations in funnel angles to observe the impact on briquette quality. The funnel angles tested were 55̊, 60̊ and 70̊. Three tests were conducted : density, hardness and Water Boiling Test (WBT),with five data points for each test. The best results were obtained for mangrove wood briquettes at a 55̊ funnel angle, with an average density of 1,12 grams/cm3, average hardness of 38,34 kg/cm2 and average WBT value of 5.785,02 kJ/kg. Funnel angle significantly influenced the quality of the produced briquette.
Homogenization of Bricket Dough: A Study on Horizontal Helical Ribbon Mixer Ma'a, Mustaza; Adli, Muhammad Amirul; Novison, Roni; Wijianto, Agus; Nugraha, Nurcahya
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v20i1.727

Abstract

The design of this briquette dough mixer machine is designed to mix briquette dough with a horizontal stirrer, the mixing knife used is a helix with two blades with different directions and sizes. This mixing machine uses a 1 HP AC motor with a motor speed of 1,400 Rpm, the engine also uses a 1:20 ratio gearbox, the rotation is obtained at 70 Rpm then reduced again to 50 Rpm using the pulley ratio so that the rotational speed achieved is 50 Rpm. The capacity of the mixing tube made is 10 kg in one mixing process, to be able to reach a capacity of 10 Kg requires matching the composition of the dough which consists of 5.75 Kg of charcoal, 0.287 Kg starch and 4.025 Kg water. In the process of mixing the dough, the starch is first dissolved in hot water, then slowly poured into the drum which has been filled with charcoal powder. Data collection was carried out by comparing 3 time variations, namely 10, 20 and 30 minutes. After mixing, the dough from each time variation was divided into 4 samples weighing 2.5 kg each and placed in different places. We can compare each time variation in terms of shape, texture and color so that we can analyze it. It was found from field experiments that to produce quality briquette dough, the mixing time was 30 minutes with an average power consumption of 2.49 KwH.