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All Journal JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Journal of Engineering and Applied Technology
Susilo, Gunawan Budi
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Automotive Engineering Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Engineering Mechanical Engineering Social Sciences

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Energy balance of thermal and catalytic degradation processes of plastic waste for producing alternative fuel Sasongko, Beni Tri; Wisnu Wardhana, Prabuditya Bhisma; Kurniawan, Stephanus Danny; Susilo, Gunawan Budi
Journal of Engineering and Applied Technology Vol. 4 No. 2 (2023): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v4i2.61334

Abstract

A simple thermal and catalytic degradation of polyethylene plastic waste has been carried out to produce alternative liquid fuel. Plastic of 1500 grams was pyrolyzed at a specific temperature of 450 °C. The gases were condensed in a water-cooled condenser and collected in a liquid container. Energy balance calculation was done where catalytic cracking with Y zeolite as catalyst seemed to be the best because the generated thermal energy from waste plastic oil was already higher than the required electric energy supplied for the cracking. However, several improvements must always be made in order to save more energy and create the best result for commercialization.
CORN COB AND COCOA SHELL WASTE: A RENEWABLE ENERGY SOURCE SOLUTION Susilo, Gunawan Budi; Hayati, Nur
Jurnal Dinamika Vokasional Teknik Mesin Vol. 10 No. 1 (2025)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v10i1.83911

Abstract

This study aims to assess the potential of corn cob and cocoa shell waste as a renewable energy source and develop effective technology to convert these wastes into renewable energy, as well as test the efficiency and safety of using alternative fuels produced from corn cob and cocoa shell waste. The stages of this research start from the stage of making briquettes and testing the physical briquettes and water boiling tests. The results showed that corn cob and cocoa shell waste can be converted into biomass that can be used as an energy source. The charcoal briquettes produced from corn cob waste and cocoa peels have a high calorific value, so they can be used as an effective energy source. In addition, the use of corn cob and cocoa shell waste as an energy source can reduce the amount of waste generated and environmental pollution caused by burning waste. Corn cobs and cocoa pods have good thermal properties to be used as biomass fuel in renewable energy generation systems. The study evaluated the physical quality based on variation of corn cobs and cocoa shells mixture composition. The physical quality to be analyzed were stability, density, thermal properties, and heat of combustion. With the right process, these two wastes can be a solution for environmentally friendly energy needs, while providing economic benefits for farmers. Proper management of these wastes can accelerate the shift towards renewable energy, reduce waste and mitigate negative environmental impacts.
ANALYSIS OF THE EFFECT OF CUTTING SPEED AND CURRENT ON SURFACE ROUGHNESS WITH CNC PLASMA CUTTING ON STEEL PLATES SS400 Susilo, Gunawan Budi; Sasongko, Beni Tri; Wardhana, Prabuditya Bhisma Wisnu
Jurnal Dinamika Vokasional Teknik Mesin Vol. 9 No. 1 (2024)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v9i1.72268

Abstract

Surface roughness characteristics are very important data in the machining process. This study aims to determine how much influence the cutting speed and current variation with air pressure of 1 MPa on surface roughness of SS 400 steel plate cutting using CNC plasma cutting on roughness. The independent variables of the research are variations in cutting speed and current. Testing the cutting speed of the material removal rate (MMR) using the method of reducing the mass of the workpiece and calculating the empirical formula, testing the surface roughness using the surface roughness tester TR 1200. The data are presented in the form of tables and graphs. The results of the material removal rate test for reducing the mass of the workpiece, the lowest value obtained in this study was 378 mm/min3 with a cutting current of 110 A and the highest was 1890 mm/min3 with a cutting current of 100 A, while at the melting point at a current of 90, 100, 110 Ampere get a value of 0.444, 0.494, 0.543 cm/min3.baSe The results of the roughness test, which should be that the higher the melting point value, the higher the roughness level, at 90 Ampere cutting currents get an average value of 12,502 μm, 100 Ampere currents have an average value of 8.653 μm and, 110 Ampere currents have an average value of 7.56 μm . Cutting speed affects the cutting current, the results of calculations using the mass weighing method and using calculations, the results of testing the measurement of the roughness value are getting smaller. 
Co-Authors Kurniawan, Stephanus Danny Nur Hayati Sasongko, Beni Tri Wisnu Wardhana, Prabuditya Bhisma