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All Journal STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin
Nashrullah, M Dimyati
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PENGARUH VARIASI KONSENTRASI PREKURSOR TERHADAP KARAKTERISASI NANOPARTIKEL ZINC OXIDE DENGAN METODE SOL-GEL Rahman, Purnama Auliya; Junus, Salahuddin; Hardiatama, Intan; Nashrullah, M Dimyati; Nurdiansyah, Haidzar
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 1 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Nanomaterial research, especially in the field of experimentation, cannot be separated from characterization or measurement activities, with characterization we can be sure that the synthesized material meets the nanostructure criteria, one of which is nanometer-sized. In this study we will characterize ZnO nanomaterials from the sol-gel method. Sol-gel is a chemical method that changes the state of the sol (liquid) into a gel state which is then after treatment and the transition to solid oxide material. Zinc Oxide nanoparticles are made with variations in the precursor of Zinc Acetate Dyhidrate 0.3 M and 0.1 M produce crystalline nanomaterial sizes of 157-123 nm. The crystal lattice parameters obtained are a = 3.2714 Å and c = 5.2121 Å and structural characterization revealed a single phase of ZnO with hexagonal wurtzite structure. For the average particle size of Zinc Oxide nanoparticle produced is 86,64-12,60 nm and the morphological form of ZnO nanoparticles produced is spherical and particles agglomerate. The final results show that the increase in the variation of the Zinc Acetate Dyhidrate precursor will increase both the crystal size and the size of the particles produced.
OPTIMASI PARAMETER VACUUM ASSISTED RESIN INFUSION PRODUK FRONT TOP TERHADAP KEKASARAN PERMUKAAN Valerian, Joey; Dwilaksana, Dedi; Syuhri, Ahmad; listyadi S, Digdo; Nashrullah, M Dimyati; Noor HS, Skriptyan
STATOR: Jurnal Ilmiah Teknik Mesin Vol 6 No 2 (2023): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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The use of composite materials as a substitute for metal materials in the engineering field has become increasingly widespread not only in the field of transportation panels but also in other fields such as property and architecture because alternatives have the advantage of using composite materials to be lightweight, corrosion resistant and strong and can be designed as needed. One of the methods developed to manufacture composite polymers is resin infusion with vacuum assistance. This method is inversely compared to the non-vacuum method. The (VARI) process requires an airtight space in printing and can reduce the fouling effects that occur in non-vacuum processes such as causing a lack of optimal composite material properties. The Taguchi method is a methodology in the field of engineering which is very much aimed at improving a product quality in a time process while at the same time reducing costs and minimal resources. The Taguchi method is a product or process that is robust against noise, therefore this method is a robust design. In writing this research, I have experience in the process of making and researching carbon in body organization in the Mechanical Engineering University of Jember named Tawang Alun, here I will conduct research in analyzing the optimal parameters for the surface roughness characteristics of front cover products made of carbon fiber using a vacuum process. resin infusion aid. The factor that contributes the most to the surface roughness response is vacuum pressure with a contribution of 25.20%. For hardener factor contribution of 14.93% and coating factor of 23.77%. The contribution error that occurs is 36.09%. Each factor has a value contribution that is not too different. Based on the data and analysis results that have been obtained using the Taguchi method with the help of Minitab 19 and Microsoft Excel, it shows that the parameter of vacuum pressure has a significant influence on the results of surface roughness. While the hardener parameter has no significant effect on surface roughness, then the coating parameter has a significant effect on surface roughness. In the calculation of the F test, it can be concluded that the optimal factor parameters in making a front top with a small surface roughness value are 0.4 bar vacuum pressure, 60% hardener and PVAC coating. Keywords: PVAC, vacuum, carbon fiber, resin
ANALISIS VARIASI LUASAN HEATSINK TERHADAP UNJUK KERJA MODUL GENERATOR TERMOELEKTRIK (TEG) MEMANFAATKAN PANAS BUANGAN KONDENSOR KULKAS Wiradika, Yudha; Ilminafik, Nasrul; Junus, Salahuddin; Hardiatama, Intan; Nashrullah, M Dimyati
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 2 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Heat energy is generally only used by humans for heating an object and then heat wastefully into the environment without being converted into other energy. This study aims to find out how to utilize waste heat from 6U type refrigerator condensers by using thermoelectric generator modules. This study uses an experimental method that is used to compare the performance of a thermoelectric generator to convert waste heat from a condenser to a variation of 120cm2, 96cm2, and 72cm2 heatsink area. In the study taken every 5 minutes for 2 hours this results in a declining value. The variation of the 120cm2 heatsink area produces a temperature difference of 12.4oC - 9.4oC, the output power is 0.00119 Watts - 0.00072 Watts, and produces an efficiency of 0.014% - 0.011%. In testing the variation of 96cm2 heatsink area, it produces a temperature difference of 8.1oC - 5.3oC, the output power is 0,00055 Watt - 0,00025 Watt, and produces an efficiency of 0,010% - 0,007%. In testing the variation of the 72cm2 heatsink area it produces a temperature difference of 6.9oC - 4.5oC, the output power is 0,00042 Watts - 0,00019 Watts, and produces an efficiency of 0.009% - 0.006%. Of the three variations of the heatsink area that have been tested, the variation of the 120cm2 heatsink area produces the best results compared to other heatsink area variations.
Co-Authors Ahmad Syuhri Dedi Dwilaksana Digdo Listyadi, Digdo Haidzar Nurdiansyah Ilminafik, Nasrul Intan Hardiatama Noor HS, Skriptyan Rahman, Purnama Auliya Salahuddin Junus Valerian, Joey Wiradika, Yudha