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All Journal Sinergi Barometer JTTM: Jurnal Terapan Teknik Mesin Jurnal Rekayasa Energi dan Mekanika METAL : Jurnal Sistem Mekanik dan Termal Journal of Artificial Intelligence and Digital Business Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim
Diki Ismail Permana
Jurusan Teknik Mesin, Institut Teknologi Nasional, Bandung
Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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PEMANFAATAN PANAS BUANG FLUE GAS PLTU DENGAN APLIKASI SIKLUS RANKINE ORGANIK Diki Ismail Permana; Mohammad Azis Mahardika
BAROMETER Vol 4 No 2 (2019): Barometer
Publisher : Fakultas Teknik, Universitas Singaperbangsa Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (659.429 KB) | DOI: 10.35261/barometer.v4i2.1851

Abstract

Dalam penelitian ini, Siklus Rankine Organik (SRO) digunakan untuk mencapai daya dari pembangkit listrik tenaga uap dengan menggunakan panas buang dari flue gas sebagai sumber panas. Tujuan utama dari makalah ini adalah untuk menemukan daya yang dihasilkan dan konfigurasi evaporator yang tepat untuk memasang SRO pada sistem gas buang. Dalam hal ini, evaporator SRO dirancang, dan penurunan tekanan gas buang dihitung, dimana didapatkan hasil penurunan tekanan yang paling efektif terjadi pada evaporator yang jumlah susunan tube-nya secara stagger dengan jumlah tube sebanyak 12. Selain itu, tujuan utama kedua adalah untuk merancang sistem SRO, yang menghasilkan daya tertinggi dari pemanfaatan gas buang flue gas, sehingga pemilihan fluida kerja yang cocok sangat diperlukan. Isopentena dipilih sebagai fluida kerja yang cocok baik itu secara perpindahan energi maupun dalam aspek lingkungan (ODP dan GWP), dimana SRO dapat menghasilkan daya sebesar 747,3 kW di temperatur 130oC pada susunan evaporator secara stagger.
Optimasi Parameter Permesinan Terhadap Tingkat Kekasaran Permukaan Aluminium Proses Pembubutan Dengan Metode Taguchi Diki Ismail Permana; Yayat Yayat
METAL: Jurnal Sistem Mekanik dan Termal Vol 3, No 1 (2019)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (562.835 KB) | DOI: 10.25077/metal.3.1.10-16.2019

Abstract

This study is to determine the most suitable machining parameters to produce optimum surface roughness on turning operations using the Hurco TM20 CNC machine, ISCAR DNMG IC907 insert tool with aluminum 6061 as an object test material. The analysis was carried out using the Taguchi method with objective functions smaller the better and using ANOVA (analysis of variance) that determines which machining parameters have a significant effect on surface roughness. The machining parameters that evaluated are spindle speed, feedrate, and depth of cut. The test results shows that the machining parameters that produce the optimal surface roughness level is on range of 0.28 ± 0.13, and the parameters are spindle speed = 2092 rpm, feedrate = 0.07 mm / ref, dept of cut = 0.5 mm.
Design and Construction of Micro-hydro Model With Different Flowrate as a Learning Medium Diki Ismail Permana; Dini Fauziah; Decy Nataliana
METAL: Jurnal Sistem Mekanik dan Termal Vol 4, No 1 (2020): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1864.732 KB) | DOI: 10.25077/metal.4.1.28-32.2020

Abstract

Renewable energy generation such as hydropower, micro-hydro, and pico hydro are among the concerns of the government to reduce the greenhouse effect, gas emissions, and global warming and have set targets in 2025. Higher education institutions are expected to contribute to government development targets, one of which is by producing human resources, which is reliable, especially in the field of renewable energy and hydropower generation. So, we need innovative learning methods or media in the teaching and learning process. In this case, a set of demonstration tools in the form of a micro-hydro system model with varying parameters so that students can easily understand a course and could connect the theory with the real world/industry.
Analysis of variance dimension of reinforcement to stress concentration factor using Finite Element Method Ali Ali; Diki Ismail Permana; Hermawan Nurfakhira Yudha
SINERGI Vol 26, No 3 (2022)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2022.3.004

Abstract

Stress concentration is a condition when stress increases only at a certain area of a component compared to the stress at the uniform cross-section of the component when given a load. This phenomenon can occur due to irregular geometry such as a hole, sharp angle, cross-section change, notch, threads, groove, crack, etc. Any change in geometric shape on a uniform cross section will cause a stress increases. High stress concentrations need to be reduced to prevent faster failure of a component. The stress concentration that occurs can be determined by using stress concentration factors (Kt). Using FEM method, the simulation obtained stress distribution that occurs in the shaft that is modelled, both without and with the additional groove. The results obtained by the additional of a semi-circular groove can reduce stress concentrations up to ten percent.
Solar energy utilization in desalination power plan Erdiansyah; Kristyadi Tarsisius; Diki Ismail Permana
JTTM : Jurnal Terapan Teknik Mesin Vol 4 No 1 (2023): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v4i1.527

Abstract

A steam power plant (PLTU) uses demin water to generate 3x350 MW of electrical energy. Reverse Osmosis Desalination system is used to treat the 190 m3/hour of desalinated water that is produced from seawater. Solar energy will replace the 225.41 kW of electrical energy required for the RO desalination pump in order to lessen pollution and the greenhouse effect caused by PLTU. The PLTU is situated in Pelabuhan Ratu Sukabumi, West Java. This region has a solar radiation potential of 3.189 kWp/day/m2 and a deployment space for PV modules of 6,167 m2, divided into two zones: the ground and the roof. The needs analysis is carried out by utilizing software simulations that estimate the power requirements of desalination pumps and the potential of electrical energy from solar radiation based on land availability. According to the modeling findings, PLTS can produce 1024 MWh/year of electrical energy with 1,458 pieces of 450 Wp PV modules and 5 units of 120 kW inverters.
Pelontar Ball Bullet Otomatis dengan Variasi Tekanan Liman Hartawan; Diki Ismail Permana; Priyan Aras Sandi
Jurnal Rekayasa Energi dan Mekanika Vol 3, No 1 (2023): JREM
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/JREM.v3i1.24

Abstract

ABSTRAK Ball bullet adalah peluru dengan diameter 6 mm yang biasa digunakan untuk air soft gun. Airsoft gun memanfaatkan gas CO2, green gas atau udara yang dimampatkan dalam tabung/chamber. Kapasitas gas atau udara yang dihasilkan untuk mendorong ball bullet sudah tertentu. Hal ini akibat konstruksi sistem pelepasan gas atau udara mampat tersebut. Pada penelitian ini dibuat alat pelontar ball bullet 6 mm yang dapat di variasikan tekanannya. Variasi tekanan ini berdampak terhadap peningkatan kecepatan ball bullet (dalam fps) yang keluar dari barel. Tipe pelontar ball bullet yang dibuat adalah single pump, sehingga seluruh udara bertekanan di dalam chamber dikeluarkan semua dalam satu kali tembak. Udara bertekanan dihasilkan dari mini kompresor yang ditampung dalam chamber. Bahan chamber yang digunakan adalah pipa PVC schedule 40 ukuran 1 inch dan panjang 10 cm, agar mudah dibuat dan mampu menahan tekanan pengujian. Tekanan pada chamber divariasikan 1 hingga 5 bar melalui yang diukur menggunakan piezoresistive pressure sensor. Pengukuran kecepatan lontaran ball bullet pada ujung barel diukur menggunakan chronometer. Perangkat kontrol yang digunakan adalah Arduino UNO yang mengendalikan solenoid valve untuk melepaskan udara bertekanan dari chamber. Pengujian dilakukan dengan jarak tembak 5 meter menggunakan target standar Perbakin. Hasil pengujian diperoleh rata-rata peningkatan kecepatan terhadap kenaikan tekanan adalah 28% dari 1 bar hingga 3 bar. Namun pada tekanan 4 dan 5 bar hanya meningkat 15% dan 20%. Kecepatan rata-rata ball bullet minimal pada tekanan 1 bar yaitu 111,2 fps dan maksimal pada tekanan 5 bar yaitu 252,4 fps. Tingkat kepresisian terendah adalah pada tekanan 3 bar yaitu 53 mm dan tertinggi pada tekanan 5 bar yaitu 28 mm. Kata-kata kunci: Airsoft Gun, Single Pump, PVC pipe, chronometer, solenoid valve. ABSTRACT Ball bullet is a bullet with a diameter of 6 mm which is commonly used for air soft guns. Airsoft guns use CO2 gas, green gas or compressed air in a tube/chamber. The capacity of the gas or air produced to push the ball bullet is certain. This is due to the construction of the gas or compressed air release system. In this study, a 6 mm ball bullet launcher was made which can be varied in pressure. This pressure variation has an impact on increasing the speed of the ball bullet (in fps) that comes out of the barrel. The type of ball bullet launcher that is made is a single pump, so that all the pressurized air in the chamber is removed all in single shot. Pressurized air is produced from a mini compressor which is accommodated in the chamber. The chamber material used is schedule 40 PVC pipe with a size of 1 inch and a length of 10 cm, so that it is easy to make and strong enough with testing pressure. The pressure in the chamber is varied from 1 to 5 bar through which it is measured using a piezoresistive pressure sensor. Measurement of the speed of the ball bullet at the end of the barrel is measured using a chronometer. The control device used is Arduino UNO which controls the solenoid valve to release compressed air from the chamber. The test was carried out to shoot Perbakin's standard targets with 5 meters shooting range. The test results the average speed to pressure increase 28% from 1 bar to 3 bar. But at 4 and 5 bar it only increased 15% and 20%. The minimum average speed of the ball bullet is at 1 bar pressure 111.2 fps and the maximum is at 5 bar 252.4 fps. The lowest level of precision is at 3 bar which is 53 mm and the highest is at 5 bar which is 28 mm. Keywords: Airsoft Gun, Single Pump, PVC pipe, chronometer, solenoid valve.
Perancangan dan Simulasi Kompressor Sentrifugal dengan fluida SCO-2 Pada Siklus Brayton Regeneratif Gunawan, Gad; Permana, Diki Ismail
Jurnal Rekayasa Energi dan Mekanika Vol 3, No 2 (2023): JREM
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/JREM.v3i2.112

Abstract

 Di Indonesia, terdapat potensi energi baru dan terbarukan (EBT) yang cukup besar dan beragam. Salah satu sumber energi terbarukan yang tersedia adalah biomassa. Pemanfaatan Siklus Brayton dengan karbon dioksida sebagai fluida kerja pada fase superkritis merupakan salah satu metode pemanfaatan biomassa. Karena karbon dioksida tersedia secara luas di Bumi dan memiliki kepadatan tinggi pada fase superkritis, mesin turbo kompak dapat digunakan. Hal ini memungkinkan desain turbin, kompresor, dan alternator yang kecil. Keuntungan Siklus Brayton adalah penggunaan regenerator untuk pemulihan panas di sisi keluar turbin. Tujuan dari proyek ini adalah untuk membangun kompresor sentrifugal untuk Siklus Regeneratif Brayton. Output bersih kompresor yang diharapkan adalah 40 kW pada 70.000 rpm. Fluida kerja karbon dioksida superkritis (S-CO2) yang digunakan dalam siklus regeneratif Brayton ditujukan untuk temperatur masuk turbin 800 K, temperatur masuk kompresor 320 K. Menurut desain siklus, turbin dan kompresor memiliki daya masing-masing sebesar 113,84 kW dan 60,53 kW. Pendekatan desain geometris yang digunakan sejalan dengan beberapa literatur terkait penelitian. Hasil desain kompresor kemudian disimulasikan oleh computational fluid dynamic (CFD). Berdasarkan temuan pemodelan CFD, kompresor sentrifugal membutuhkan daya sebesar 69,89 kW dengan efisiensi isentropik sebesar 60,03 persen pada kondisi desain. Daya bersih yang dihasilkan sebesar 43,39 kW berdasarkan hasil simulasi CFD. Kata kunci: siklus Brayton, karbon dioksida superkritik, kompreso, perancangan dan simulasi Abstract In Indonesia, there is a substantial and varied potential for new and renewable energy. One of the renewable energy sources that is present practically everywhere is biomass. Utilizing the Brayton Cycle with carbon dioxide as the working fluid in the supercritical phase is one method of utilising biomass. Because carbon dioxide is widely available on Earth and has a high density in the supercritical phase, compact turbomachinery can be used. This allows for the small design of the turbine, compressor, and alternator. The Brayton Cycle's advantage is the employment of a regenerator for heat recovery on the turbine's exit side. The purpose of this project is to build a centrifugal compressor for the Regenerative Brayton Cycle. The intended net output of the compressor is 40 kW at 70,000 rpm. The supercritical carbon dioxide working fluid (S-CO2) used in the regenerative Brayton cycle is intended for turbine inlet temperatures of 800 K, compressor inlet temperatures of 320 K. According to the cycle's design, the turbine and compressor have respective powers of 113.84 kW and 60.53 kW. An approach to geometric design is used that is in line with some of the research-related literature. The outcomes of the compressor design are then subjected to CFD simulations. According to the CFD modeling findings, the centrifugal compressor requires 69.89 kW of power with an isentropic efficiency of 60.03 percent under design conditions. The net power produced is 43.39 kW based on the outcomes of the CFD simulation. keywords ; Brayton cycle, supercritical karbon dioxide, compressor, design and simulation
Implementasi Reliability Centered Maintenance (RCM) Berbasi Analisis Kuantitatif Vibrasi dan Infrared Thermography Pada Pompa Sentrifugal Untuk Meningkatkan Keandalan Sistem Samloy, Marscel Alpharo; Shidiq, Ahmad; Joenoes, Ahmad Taufik; Permana, Diki Ismail
RIGGS: Journal of Artificial Intelligence and Digital Business Vol. 5 No. 1 (2026): Februari - April
Publisher : Prodi Bisnis Digital Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/riggs.v5i1.7393

Abstract

Pompa sentrifugal merupakan peralatan vital dalam sistem industri yang berperan penting dalam menjaga kontinuitas proses produksi. Peralatan ini rentan terhadap berbagai kegagalan mekanis, seperti mass imbalance, misalignment, dan kerusakan bearing. Gangguan tersebut umumnya ditandai dengan meningkatnya tingkat getaran serta munculnya anomali temperatur pada komponen utama, yang apabila tidak segera ditangani dapat menyebabkan penurunan kinerja hingga kegagalan sistem. Oleh karena itu, diperlukan pendekatan pemeliharaan yang tepat untuk mendeteksi kerusakan sejak dini secara akurat dan sistematis. Penelitian ini bertujuan mengembangkan metode Reliability Centered Maintenance (RCM) berbasis pendekatan kuantitatif melalui integrasi analisis vibrasi dan Infrared Thermography. Pengukuran getaran dilakukan untuk mengidentifikasi spektrum frekuensi dominan, yang kemudian dibandingkan dengan standar ISO 10816-3 dalam mengevaluasi tingkat keparahan getaran mesin. Hasil analisis menunjukkan bahwa nilai getaran berada pada zona C (kelas 3), yang mengindikasikan adanya potensi mass imbalance pada sistem pompa. Selanjutnya, analisis Infrared Thermography dilakukan dengan mengacu pada standar ISO 18434-2 untuk mendeteksi distribusi temperatur pada area bearing housing dan coupling. Hasil pengamatan menunjukkan adanya pola pemanasan asimetris yang mengindikasikan potensi misalignment serta degradasi pelumasan. Integrasi kedua metode condition monitoring dalam kerangka RCM mampu meningkatkan ketepatan identifikasi failure mode, mengoptimalkan interval pemeliharaan, serta mendukung peningkatan keandalan dan efisiensi operasi pompa sentrifugal secara berkelanjutan dan optimal.
Analisis Frekuensi Getaran dan Diagnosis Kegagalan pada Kompresor Udara Ulir Ganda Berdasarkan Standar ISO 10816-3 Juliyanda Cendrika Zahrawan; Muhammad Alwan Ramadhan Herma; Diki Ismail Permana; Ahmad Taufik Joenoes; Dani Rusirawan
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 2 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i2.5162

Abstract

A twin screw air compressor is an important industrial machine whose performance is strongly influenced by its mechanical condition during operation. One of the main parameters used to evaluate machine condition and health is vibration. Excessive vibration may indicate mechanical faults such as mass imbalance, mechanical looseness, and abnormal rotor lobe interaction. This study aims to analyze the vibration characteristics of a twin screw air compressor during operation and to identify fault indications based on frequency spectrum analysis. Vibration measurements were carried out using an Emerson CSI 2130 Machinery Health Analyzer with tri-axial accelerometers at several measurement points on the compressor and electric motor. Time-domain vibration data were processed using the Fast fourier transform (FFT) method to obtain frequency spectra, which were then analyzed based on fundamental frequencies, harmonics, and Lobe mesh frequency (LMF). The vibration amplitude results were compared with ISO 10816- 3 standard to evaluate machine condition. The analysis results show dominant frequencies at 0.5× RPM and 1× RPM indicating mechanical looseness and mass imbalance, as well as the appearance of a frequency around 253 Hz and its harmonics identified as lobe mesh frequency. Evaluation based on ISO 10816-3 indicates that the machine vibration condition ranges from acceptable to dangerous zones at certain measurement points. This study can be used as a basis for machine condition assessment and maintenance recommendations.
Co-Authors Ahmad Shidiq, Ahmad Ahmad Taufik Joenoes Ali Ali Dani Rusirawan Decy Nataliana DINI FAUZIAH Erdiansyah Erdiansyah Gad Gunawan Hermawan Nurfakhira Yudha Joenoes, Ahmad Taufik Juliyanda Cendrika Zahrawan Kristyadi, Tarsisius Liman Hartawan Mahardika, Mohammad Azis Muhammad Alwan Ramadhan Herma Priyan Aras Sandi Samloy, Marscel Alpharo Yayat Yayat