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All Journal Jurnal Teknik ITS Jurnal Sains Materi Indonesia Rekayasa Mesin Power Plant Energi & Kelistrikan Metalurgi Journal of Electronics, Electromedical Engineering, and Medical Informatics Metalurgi
Andika Widya Pramono
FTBE IT PLN
Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Analisa Pengaruh Jumlah Pengoperasian CWP Terhadap Performa Kondensor PLTU Rembang Andika Widya Pramono; Gita Puspa Artiani; Alan Laksono
JURNAL POWERPLANT Vol 3 No 1 (2015): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/powerplant.v3i1.790

Abstract

Heat exchanger is a device used to transfer heat from one fluid to another fluid. One in Rembang heat exchanger is a condenser. The condenser serves to condense low pressure steam turbine output by using sea water as coolant fluid. The condenser is a turbine auxiliary equipment which, if having problems then it will result in generation efficiency. In the design of the contractor takes 4 CWP to supply cooling water condenser, but the reality on the ground, only 3 CWP operated. Therefore it is necessary to know how the effects of these operations on the performance of the condenser. The method of analysis is done by calculating the performance of the condenser is based on the current operating parameters of the performance test. By knowing the conditions and the actual performance of the condenser, it will be able to increase plant efficiency.
Modifikasi Sistem Backup Udara Instrument Boiler, Turbin Dan Generator Dari Udara Service Untuk Meningkatkan Kehandalan Operasi Pada PLTU Suralaya Unit 1-4 Andika Widya Pramono; Indah Handayasari; Asep Tresna Lh
JURNAL POWERPLANT Vol 3 No 2 (2015): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/powerplant.v3i2.819

Abstract

The operation of a power plant, reliability is one of the factors that is maintained. One of the factors that have a very important role in the operation system reliability PLTU air instrument is a system where the system is working to provide air supply pressured performing for the operation instrument controls Honda pneumatic. Suralaya Power Plant In unit 1-4 this system is equipped with three for each unit and this in complete system backup system of air service to anticipate if there was a problem in the air instrument. Current, if there is any drop pressure because bermasalahnya air conditioning system instrument backup air instrument from the air opened by manual service by the operators because isoting valve is still a valve manual work so that they will have a response inadequate. To improve response safety backup from the air service can be done by using valve control that worked independently automatically without the control of operator. Planning process valve control is done in implementing the aspects the choice of valve, determining the values settings, reliability operation, and security operations valve control.
Pengaruh Perlakuan Panas Terhadap Sifat Mekanis Dan Struktur Mikro Pada Baja AISI 4340 Halim Rusjdi; Andika Widya Pramono; Wahyu Bawono Faathir
JURNAL POWERPLANT Vol 4 No 2 (2016): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1328.133 KB) | DOI: 10.33322/powerplant.v4i2.848

Abstract

The heat treatment is a combination of heating and cooling operations to metals or alloys in solid state at a certain time interval detention. This heat treatment is given on the metal or alloy to obtain certain properties. The heat treatment process varies depending on the purpose of the provision of heat treatment itself, which commonly refers to the mechanical properties and microstructure of the material. In this study, we want to know is the effect of heat treatment on mechanical properties and microstructure happened. The heat treatment process is carried out by the method of quenching and tempering method, performed at the beginning of the workpiece AISI4340 and medium carbon steel and mechanical testing is performed tensile test, hardness test rockwell, and testing of microstructure.
Analisis Kegagalan Material Stem Control Valve Desuperheater PLTU 1x660 Mw PT.Lestari Banten Energi Andika Widya Pramono
JURNAL POWERPLANT Vol 8 No 2 (2020): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/powerplant.v8i2.1509

Abstract

Pada boiler terdapat desuperheater yang berfungsi untuk mengontrol temperatur uap yang keluar dari superheater Control valve digerakkan oleh actuator dan minyak hidrolik sebagai penggerak buka tutupnya valve, pada material actuator ditemukan suatu komponen yang mengalami kegagalan material berupa patahnya suatu stem. Untuk mengetahui akar penyebab dan mekanisme kegagalan stem, maka dilakukan studi serta penelitian yang meliputi pengamatan visual dan analisis dari beberapa pengujian seperti pengujian kekerasan, pengujian metalografi guna mengetahui struktur mikro, pengujian fraktografi untuk melihat struktur makro dan pengujian SEM – EDS mapping
Fabrikasi Kawat Resistansi Nol Berbahan MgB2/Stainless Steel dengan Variasi Reduksi Ukuran melalui Pengerolan Dingin terhadap Karakteristik Mekanik dan Struktur Mikro Satrio Herbirowo; Andika Widya Pramono
Energi & Kelistrikan Vol 13 No 2 (2021): Energi dan Kelistrikan: Jurnal Ilmiah
Publisher : Sekolah Tinggi Teknik PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/energi.v13i2.1491

Abstract

Magnesium Diboride (MgB2) is a high potential material for medical and electrical applications with zero resistance and high efficiency. The raw materials of Mg powder with a purity of 98% and B amorphous with a purity of 95%, were mixed with a ratio of 1:2, ground for 2 hours using an agate mortar, and subsequently compacted and inserted into stainelss steel (SS) tube by powder-in-tube (PIT). The SS tube was previously annealed at 900°C for 1 hour. The sintering process was carried out using a muffle furnace at a temperature of 800°C for 1 hour, followed by cold wire rolling with gradual reduction. The samples were characterized for their mechanical properties using Vickers microhardness tester and ultimate tensile test machine. Surface morphologies of samples were observed using optical microscope and SEM-EDAX Superconducting properties were measured with the cryogenic resistance measurement. The highest hardness value of 377,2 HV was achieved at a 60% size reduction along with the tensile strength of 1381 KN/mm. The results of the morphological observation showed homogeneous deformation without any cracks, with the the grain shape tended to be crystalline. The superconductivity test showed the phenomenon of zero resistance at a critical temperature of 39.55K at a 40% reduction in MgB2 wire
PERCOBAAN PEMBUATAN FASA INTERMETALIK Nb3Sn DENGAN PROSES SINTERING LOGAM NIOBIUM (Nb) DAN TIMAH (Sn) Florentinus Firdiyono; Andika Widya Pramono; Pius Sebleku; Nurhayati Indah Ciptasari; Anton Suryantoro
Metalurgi Vol 26, No 3 (2011): Metalurgi Vol. 26 No. 3 Desember 2011
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (632.387 KB) | DOI: 10.14203/metalurgi.v26i3.19

Abstract

Penentuan kondisi optimum meliputi waktu milling Nb dan Sn dengan HEM (High Energy Milling), perbandingan jumlah Nb dan Sn, waktu dan temperatur pemanasan campuran Nb dan Sn. Pengamatan karakterisasi Nb3Sn yang terbentuk dilakukan dengan  menggunakan DTA (Differential Thermal Analyzer), XRD ( X-Ray Diffraction), SEM (Scanning   Electron Microscope) dan EDS (Enegy Dispersive x-ray Spectroscopy). Analisis dengan menggunakan SEM dan XRD menunjukkan waktu minimum yang diperlukan untuk milling campuran Nb dan Sn adalah 3 jam, sedangkan hasil dari analisis DTA menunjukkan pembentukan Nb3Sn terjadi pada temperatur sekitar 700 °C. Analisis XRD terhadap campuran Nb dan Sn menunjukkan bahwa makin lama waktu pemanasan maka fasa intermetalik Nb3Sn yang terbentuk akan semakin banyak. Abstract Determination of optimum conditions include milling time of Nb and Sn with HEM, ratio of Nb and Sn, heating time and heating temperature of mixed Nb and Sn. Characterization of Nb3Sn produced from the process was performed using DTA, XRD, SEM and EDS. The results of SEM and XRD analysis showed the minimum time needed for milling Nb and Sn are 3 hours, and the result of DTA analysis showed the intermetalic phase of Nb3Sn was occured at the temparetuir around 700 °C. The result of XRD analysis for mixed Nb and Sn showed that by the increasing of heating time will produced more intermetalic phase of Nb3Sn.
ANALISA KERUSAKAN PADA ATAP ZINCOATING DI LINGKUNGAN ATMOSFER INDUSTRI[Damage Analysis of Zincoted Roof in the Industrial Atmospheric] Moch Syaiful Anwar; Cahya Sutowo; Andika Widya Pramono; Budi Priyono; Ronald Nasoetion
Metalurgi Vol 27, No 3 (2012): Metalurgi Vol.27 No.3 Desember 2012
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (433.095 KB) | DOI: 10.14203/metalurgi.v27i3.232

Abstract

OVERVIEW OF DENSITY FUNCTIONAL THEORY FOR SUPERCONDUCTORS[Sekilas Tentang Teori Fungsional Kerapatan Elektron pada Superkonduktor] Andika Widya Pramono; Anton Suryantoro
Metalurgi Vol 27, No 2 (2012): Metalurgi Vol. 27 No. 2 Agustus 2012
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (609.796 KB) | DOI: 10.14203/metalurgi.v27i2.141

Abstract

Pendekatan Persamaan Ginzburg – Landau dalam Superkonduktifitas Tipe II[APPROXIMATION OF GINZBURG – LANDAU EQUATIONS IN TYPE II SUPERCONDUCTIVITY] Andika Widya Pramono; Anton Suryantoro
Metalurgi Vol 27, No 3 (2012): Metalurgi Vol.27 No.3 Desember 2012
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (636.529 KB) | DOI: 10.14203/metalurgi.v27i3.228

Abstract

Characterization and Analysis of Hardness, Microstructure, and Crystallography of SS 304-Sheathed MgB2 Superconducting Wires Rivai, Rizky Ramadhani; Pramono, Andika Widya; Priyanto, Tri Hardi; Maghfirah, Awan
Metalurgi Vol 38, No 1 (2023): Metalurgi Vol. 38 No. 1 2023
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (828.233 KB) | DOI: 10.55981/metalurgi.2023.694

Abstract

This research was conducted to analyze the hardness, microstructural morphology, and crystallography of the MgB2 compound in the form of a SS 304-sheathed superconducting wire. MgB2 superconducting wire with SS 304 outer sheath was manufactured using an ex-situ rolling process. The results of the Vickers hardness test with a load of 0.3 N showed the MgB2 hardness value of 355.1 HV. The results of observations with SEM-EDS (scanning electron microscopy-energy dispersive spectroscopy) showed the agglomerations of the second phase of (Mg)B-O with various compositions due to the rolling process. There was also a longitudinal crack in the MgB2 area due to the work-hardening phenomenon in the brittle MgB2 solid. There were no obvious Bragg peaks in the MgB2 phase. The detected Bragg peaks came from the austenitic (g-Fe) of SS 304-sheath.   
Co-Authors Adjiantoro, Bintang Agung Imaduddin Alan Laksono Anton Suryantoro Anton Suryantoro Anton Suryantoro Anwar, Moch Syaiful Ari Yulianto Asep Tresna Lh Bintoro Siswayanti Budi Priyono Budi Priyono Cahya Sutowo Ciptasari, Nurhayati Indah Doty Dewi Risanti Fendy Rokhmanto Florentinus Firdiyono Florentinus Firdiyono Franciska Pramuji Lestari Gita Puspa Artiani Halim Rusjdi Hendrik Hendrik Indah Handayasari Kholifatul Aniswatin Maghfirah, Awan Moch Syaiful Anwar Nasoetion, Ronald Nurhayati Indah Ciptasari Paristiawan, Permana Andi Pius Sebleku Pius Sebleku Pius Sebleku Puspasari, Vinda Rivai, Rizky Ramadhani Ronald Nasoetion Satrio Herbirowo Sigit Dwi Yudanto Suryantoro, Anton Talitha Asmaria Tri Hardi Priyanto Wahyu Bawono Faathir Yeni Rian Sari