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All Journal Jurnal Sains Materi Indonesia JFA (Jurnal Fisika dan Aplikasinya) Telaah Science and Technology Indonesia Teknologi Indonesia Metalurgi Jurnal Teknik Mesin Cakram Makara Journal of Science Makara Journal of Technology

Perdamean Sebayang

Lembaga Ilmu Pengetahuan Indonesia (LIPI)

Author-ID : 375085

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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FLYWHEEL AS THE KINETIC ENERGY STORAGE IN A GENERATOR SYSTEM: EXPERIMENTAL AND SIMULATION Tetuko, Anggito Pringgo; Juliyana, Ujang T; Purwanto, Budi A; Kurniawan, Candra; Setiadi, Eko A; Andrameda, Yurian A; Ginting, Masno; Sebayang, Perdamean
Teknologi Indonesia Vol 41, No 1 (2018)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jti.v41i1.529

In this paper, a flywheel generator system as a kinetic energy storage was analysed that consists of both theoretical models (analytical and numerical) and experimental. The analytical model was solved to calculate the kinetic energy stored and the moment of inertia of the flywheel. On the other hand, the numerical model was developed to analyse the stress and the deformation distributions on the flywheel. The experiments were conducted by varying the flywheel mass of 15-18 kg; and the pulley ratio of 1:1, 2:1, 3:1. The numerical simulation confirmed that the stress and the deformation values on the flywheel were under the material ultimate stress. The experimental results suggested that the increase of the flywheel mass also increases the capability of the flywheel to store the kinetic energy. A similar trend also found in the pulley ratio variations where the increase of the pulley ratio enhances the rotational speed of the generator thus increasing its electricity generation.

ANALISIS PERPINDAHAN PANAS PADA WATER JACKET DI RUANG BAKAR PRIMER INCINERATOR SAMPAH KOTA Nailul Atifah; Bambang Herlambang; Edi Tri Astuti; Yayan Mulyana; Perdamean Sebayang
Jurnal Teknik Mesin Cakram Vol 3, No 2 (2020)
Publisher : Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jtc.v3i2.7519

Telah dilakukan penelitian mengenai analisis perpindahan panas pada water jacket di ruang bakar primer incinerator sampah kota. Analisis perpindahan panas dilakukan ketika water jacket berada dari fase cair hingga mencapai titik didihnya, yaitu 100 oC, Suhu api pembakaran diasumsikan seragam berdasarkan hasil pengukuran api ruang bakar diperoleh nilai stabil yakni 1097 oC. Variasi debit aliran water jacket adalah 300, 400, 500, dan 600 liter/jam. Tujuan penelitian ini adalah untuk mengetahui bagaimana kenaikan suhu dan karakteristik perpindahan panas pada water jacket dan pengaruh variasi debit terhadap kenaikan suhu water jacket di sepanjang ketinggian dinding ruang bakar. Penelitian dilakukan dengan melakukan perhitungan parameter termohidrolika yang merupakan fungsi suhu yang meliputi densitas, viskositas, konduktivitas, dan bilangan Prandtl. Kemudian, dilanjutkan dengan melakukan perhitungan bilangan Reynolds, Nusselt, koefisien perpindahan panas konveksi, Log Mean Temperature Difference (LMTD), resistensi termal total, dan laju perpindahan panas di sepanjang tinggi cerobong (L) sampai suhu air mencapai 100 oC. Perhitungan tersebut dilakukan dengan metode Euler. Dari hasil perhitungan perpindahan panas diketahui bahwa suhu water jacket di sepanjang ketinggian dinding ruang bakar mengalami kenaikan hingga mencapai titik didihnya. Akan tetapi, ketika aliran water jacket semakin mencapai ke atas, gradien kenaikan suhunya mengalami penurunan nilai. Dengan demikian, laju perpindahan panasnya juga ikut mengalami penurunan. Dari variasi debit diperoleh hasil bahwa semakin besar debit aliran water jacket, kenaikan suhu yang dialami water jacket di sepanjang ketinggian ruang bakar juga semakin kecil. Dengan demikian semakin besar debit aliran water jacket, lintasan yang dibutuhkan untuk mencapai titik didihnya juga semakin panjang. Semakin besar debit aliran water jacket, maka laju perpindahan panas di posisi aliran yang sama juga semakin besar.

EFEK ADITIF FeMo DAN PROSES KALSINASI PADA SERBUK MAGNETIK BaFe12O19 Ayu Yuswita Sari; Cut Hani Safira; Eko Arief Setiadi; Silviana Simbolon; Candra Kurniawan; Perdamean Sebayang
Jurnal Sains Materi Indonesia Vol 18, No 3: APRIL 2017
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Pada penelitian ini, telah dilakukan investigasi efek aditif FeMo dan proses kalsinasi pada pembuatan magnet permanen bariumheksaferit (BaFe12O19). Proses pembuatan magnet bariumheksaferit dilakukan denganmetode mechanical alloying. Serbuk hasil mixing antara BaFe12O19dan FeMo dikalsinasi dengan variasi suhu kalsinasi 1000 oC dan 1200 oC. Karakterisasi yang dilakukan meliputi sifat fisis dan magnetik, dengan menggunakan X-Ray Diffraction (XRD) dan piknometeruntuk mengetahui fasa dan nilai densitas magnet, serta menggunakanVibrating SampleMagnetometer (VSM) pada pengukuran sifatmagnetikmagnet bariumheksaferit. Dari hasil eksperimen, dapat diketahui bahwa penambahan aditif FeMo dapat menaikkan nilai densitas pada serbuk bariumheksaferit. Hasil analisis sifat magnetik, dapat diketahui bahwa penambahan aditif FeMo secara keseluruhan menurunkan sifat magnetik magnet. Namun penambahan %wt FeMo menaikkan nilai remanensi, saturasi dan energi produk maksimum (BHmax) magnet barium heksaferit, meskipun nilai koersivitas magnet tetap menurun. Sedangkan kenaikan suhu kalsinasi mampu menaikkan nilai remanensi, dan BHmax, namun menurunkan nilai koersivitas dan saturasi dari magnet barium heksaferit. Hal ini menunjukkan penambahan zat aditif FeMo mampu mengubah struktur material magnet permanen barium heksaferit dari hard magnetik menjadi soft magnetik material. Nilai optimumdihasilkan pada komposisi penambahan 5 %wt aditif FeMo dengan nilai densitas serbuk 3,71 g/cm3 sebelum dikalsinasi, dan memiliki sifat magnetik seperti: saturasi 2,12 kG, remanensi 1,15 kG, koersivitas 0,45 kOe dan BHmax0,145 MGOe setelah dikalsinasi pada suhu 1000 oC.

Efek Aditif 3Al2O3.2SiO2 dan Suhu Sintering terhadap Karakteristik Keramik -Al2O3 Perdamean Sebayang; Anggito Pringgo Tetuko; Deni Shidqi Khaerudini; Muljadi Muljadi; Masno Ginting
Jurnal Fisika dan Aplikasinya Vol 3, No 2 (2007)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Telah dilbuat keramik corundum (-Al2O3) menggunakan serbuk Al2O3 dan masing-masing ditambah: 10, 15, 20 dan 25% (berat) 3Al2O3.2SiO2, digiling 24 jam, lolos ayakan 200 mesh, dikeringkan 110C, dicetak 50 Mpa, dan disintering pada suhu: 1300, 1400, 1500 dan 1600C. Sebesar 20% aditif 3Al2O3.2SiO2 dan suhu sintering 1600C merupakan kondisi optimum, menghasilkan: densitas = 3,47 g/cm3, porositas = 0,64%, kekerasan (Hv) = 1454 kgf/mm2, kuat patah = 313 MPa, dan koesien ekspansi termal = 6,3 x 10−6 C−1.Corundum (-Al2O3) merupakan fasa dominan, partikelnya bulat, grain size: 0,3-0,8 μm dan minornya adalah mullite (Al2O3.2SiO2), berbentuk jarum, dan grain size: 0,3-3,0 μm.

Investigation of Microstructure and Magnetic Properties of Zn1-xMnxO and Zn0.98-xMnxFe0.02O (x = 0, 0.05, and 0.09) prepared by Solid-state Reaction Method Sebayang, Perdamean; Kurniawan, Candra; Lubis, Ridwan Y; Priyadi, Ignu; N, Nasruddin M; Aryanto, Didik
Makara Journal of Science Vol. 24, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

In this study, we investigated the microstructure and magnetic properties of Zn1-xMnxO and Zn0.98-xMnxFe0.02O (x = 0, 0.05, and 0.09) powders prepared by the solid-state reaction method. The starting material, which consisted of ZnO, Mn, and Fe powders, were wet milled for 3 hours using high-energy milling. We then used an X-ray diffractometer (XRD), scanning electron microscope, and vibrating sample magnetometer to investigate the effects of doping and co-doping on the microstructure, morphology, and magnetic properties, respectively. The XRD results suggest that Mn and Fe ions had substituted into the ZnO matrix, as illustrated by the resulting single-phase polycrystalline hexagonal wurtzite structures. The diffraction intensity was observed to decrease as the Mn composition increased. The analysis showed that the lattice parameters decreased due to Mn2+ and Fe3+ ion substitution in the ZnO matrix. The co-doping of Mn-Fe ions in the ZnO structure enhanced the magnetic properties, particularly due to the Zn0.89Mn0.09Fe0.02O composition. The increase in the Mn dopant and Mn-Fe co-dopant concentrations strongly contributed to the improved morphology and magnetic properties. Therefore, we can conclude that the presence of Mn and Fe co-dopants in the ZnO system contributed to its magnetic properties, as confirmed by high-saturation magnetization.

Micro-Magnetic Activity of the Fabricated MnFe2O4 via Co-Precipitation from Natural Iron Sand Rianna, Martha; Hussain, Muhammad Khalid; Sembiring, Timbangen; Guk-Guk, Herwati Permata Indah Raja; Sitorus, Kurnia Jesiska; Setiadi, Eko Arief; Tetuko, Anggito P.; Sebayang, Perdamean
Science and Technology Indonesia Vol. 10 No. 1 (2025): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.1.221-227

This study explores the micromagnetic behaviour of MnFe2O4 derived from natural iron sand through the coprecipitation method, without the need for calcination. Using manganese chlo-ride and iron sand as precursors, one can create MnFe2O4. Through the utilisation of X-ray Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX), and Vibrating Sample Magnetometer (VSM), one can effectively analyse and understand the crystal structure, morphology, and magnetic properties. The crystal size was reduced by a fac-tor of 0.40 nm, as revealed by XRD crystal structure analysis. Additionally, the XRD results indicated the absence of impurities, confirming the presence of a single phase. In addition, the SEM analysis revealed that samples 1, 2, and 3 underwent agglomeration. The particles have a cubic shape. The analysis using EDX indicates that there are no other elements present in the Mn, Fe, and O. Additionally, the VSM analysis confirms that the sample exhibits magnetic hardness. Sample 1 exhibits exceptional magnetic properties, with Ms values of 217.53 emu/g, Mr 34.27 emu/g, and Hc 127.42 emu/g. Photoluminescence (PL) spectroscopy was used to observe the optical properties of MnFe2O4. Sample 1 exhibits a distinct emission spectrum at 440 nm, representing the purple band. Sample 2 displays a sharp emission spectrum at 448 nm, indicating the blue band. Lastly, Sample 3 demonstrates a clear emission spectrum at 427 nm, signifying the purple band.

Effect of Audio–Sonic Waves on Heat Transfer Enhancement in a Distilled Water-Based Heat Exchanger Tetuko, Agggito Pringgo; Sari, Ayu Yuswati; Simbolon, Silviana; Sebayang, Achmad M.S.; Effendi, Nur H; Ernando, Riko; Fachredzy, Amdy; Asri, Nining S; Setiadi, Eko A; Sebayang, Perdamean
Makara Journal of Technology Vol. 29, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

In this research, the influence of audio–sonic waves on distilled water used as the working fluid in a shell-and-tube heat exchanger was examined. The audio–sonic wave frequencies and flow rates of the cold and hot liquids were varied as follows: 4.85, 6.78, and 13.43 kHz for the audio–sonic waves; 0.3, 0.4, and 0.5 l/min for the cold liquid; and 0.76, 1.0, and 1.5 l/min for the hot liquid. An increase in the audio–sonic wave frequency enhanced both the overall heat transfer coefficient (U) and the enhancement factor (EF). The optimum values of U and EF, measured at 300 W/m3 ·°C and 1.05, respectively, were achieved at the highest frequency of 13.43 kHz. Additionally, the flow rates of the hot and cold liquids in the heat exchanger significantly influenced the optimal values of U and EF.

Co-Authors Aji, Mahardika P Andrameda, Yurian A Anggito P. Tetuko, Anggito P. Anggito Pringgo Tetuko Anggito Pringgo Tetuko Asri, Nining S Ayu Yuswita Sari Ayu Yuswita Sari Bambang Herlambang Candra Kurniawan Candra Kurniawan Cut Hani Safira Deni Shidqi Khaerudini Didik Aryanto Edi Tri Astuti Effendi, Nur H Eko Arief Setiadi Eko Arief Setiadi, Eko Arief Ernando, Riko Fachredzy, Amdy Fresky Agung Prasetya, Fresky Agung Ginting, Riski Titian Guk-Guk, Herwati Permata Indah Raja Hia, Taufik Hidayat Hussain, Muhammad Khalid Juliyana, Ujang T Khoirun Nisa Lubis, Ridwan Y Lukman Faris Nurdiyansyah, Lukman Faris Martha Rianna Masbah Rotuante Tagore Siregar, Masbah Rotuante Tagore Masno Ginting Masno Ginting Muljadi Muljadi Muljadi, - N, Nasruddin M N, Nasruddin M N, Nasrudin M Nailul Atifah Nugraha, Endra Priyadi, Ignu Priyo Sardjono Purwanto, Budi A Sari, Ayu Yuswati Sebayang, Achmad M.S. Setiadi, Eko A Setiadi, Eko A Silviana Simbolon Simbolon, Silviana Siregar, Elfrida Sitorus, Kurnia Jesiska Tetuko, Agggito Pringgo Timbangen Sembiring Toto Sudiro

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