Article Per Year (5 Year)
p-Index From 2021 - 2026
3.198
P-Index
This Author published in this journals
All Journal Jurnal Ilmiah Teknologi dan Rekayasa Rekayasa Mesin OPSI FLYWHEEL : Jurnal Teknik Mesin Untirta Jurnal Rekayasa Mesin SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Sebatik Jurnal Serambi Engineering Infotekmesin Specta Journal of Technology Abdimas Universal Risenologi G-Tech : Jurnal Teknologi Terapan Jurnal Rekayasa Energi dan Mekanika Eksergi: Jurnal Teknik Energi AMMA : Jurnal Pengabdian Masyarakat Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
Gad Gunawan
Institut Teknologi Kalimantan, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation Other

Published : 24 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 24 Documents
Search

 1   2   3 
KAJI EKSPERIMENTAL PENGARUH HEAD TERHADAP PERFORMA TURBIN ULIR ARCHIMEDES TIGA SUDU Alfi Nandar; Gad Gunawan; Doddy Suanggana; Alfian Djafar
Jurnal Ilmiah Teknologi dan Rekayasa Vol 28, No 2 (2023)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35760/tr.2023.v28i2.5275

Abstract

Indonesia masih memiliki potensi energi air yang belum dimanfaatkan secara maksimal. Turbin Ulir Archimedes merupakan salah satu tipe turbin yang dapat digunakan untuk mengekstraksi energi dari dalam aliran air, khususnya untuk head rendah. Banyak hal yang mempengaruhi performa Turbin Ulir Archimedes, seperti head, debit, jumlah sudu, pitch ratio dan lain-lain. Penelitian ini berfokus pada pengaruh variasi head terhadap performa (daya dan efisiensi mekanis) dari Turbin Ulir Archimedes dengan jumlah sudu tiga. Metode yang dilakukan dalam penelitian  ini adalah eksperimen dengan variasi head yang digunakan 300 mm, 500 mm, dan 700 mm pada debit 0,00436 m3/s. Hasil eksperimen pada variasi head,  didapatkan daya mekanis tertinggi untuk  head 300 mm sebesar 4,657 Watt pada putaran 189 rpm, untuk head 500 rpm sebesar 5,569 Watt pada putaran 113 rpm, dan untuk head 700 mm 6,690 Watt pada putaran 181 rpm. Berdasarkan data tersebut, daya mekanis meningkat seiring dengan peningkatan head. Efisiensi turbin menunjukkan hasil yang berkebalikan dengan daya, efisiensi cenderung turun seiring peningkatan head. Efisiensi untuk ketiga variasi tersebut secara berurutan adalah 36,273 %, 26,012 %, dan 22,323 %.  Hal ini menunjukkan setiap turbin memiliki daerah kerja optimal tertentu, peningkatan potensi air belum tentu sebanding dengan ekstraksi energi pada turbin.
Analisis Unjuk Kerja Turbin Ulir Archimedes Satu Sudu dengan Variasi Head Gad Gunawan; Cloudiandy Mukti Kimana; Doddy Suanggana; Alfian Djafar
G-Tech: Jurnal Teknologi Terapan Vol 8 No 2 (2024): G-Tech, Vol. 8 No. 2 April 2024
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/gtech.v8i2.4218

Abstract

Solusi alternatif yang menjawab permasalahan energi fosil adalah penggunaan energi terbarukan. Energi air merupakan salah satu energi terbarukan yang cukup besar penggunaannya di dunia. Salah satu turbin yang cocok diaplikasikan pada kondisi aliran  dengan head yang rendah adalah turbin Ulir Archimedes. Penelitian ini bertujuan untuk  menguji performa turbin ulir Archimedes pada beberapa head, yaitu head 300 mm, 500 mm dan 700 mm. Turbin yang digunakan memiliki jumlah sudu satu. Metode yang digunakan adalah eksperimen, yang dilakukan di laboratorium pada instalasi pengujian yang dirancang.  Pada eksperimen ini didapatkan  daya tertinggi didapatkan pada head 700 mm sebesar 6,407 Watt dan efisiensi terbesar 26,59% pada variasi head 500 mm. Hal ini menunjukkan performa suatu turbin tergantung pada kondisi operasinya.
Analysis of Effect of Propeller Rotational Speed Variations on Torque and Power Using Computational Fluid Dynamics (CFD) Method Dicky Ocza Tama; Pradisty, Daffa Kurnia; Hosea, Richard Marbun; Gunawan, Gad
Indonesian Journal of Maritime Technology Vol. 1 No. 1 (2023): Volume 1 Issue 1, June 2023
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v1i1.890

Abstract

The speed on the ship is inseparable from a good propeller design in order to get the optimal thrust generated by the propeller motion. The propeller is a very important part in determining the ship's motion. The propeller itself is a tool used to generate thrust that comes from engine power transmitted through the shaft. Computational Fluid Dynamics (CFD) is a very suitable method for analyzing complex systems that are difficult to solve using manual calculations. With these advantages, CFD is often used to analyze a pattern of a system, one of which is the propeller, which in this study uses variations in flow velocity and propeller speed which can affect the value of the torque and power produced by the propeller.
Analysis of Tool Wear and Surface Roughness in Turning ST41 by Insert Tool for Variation in Feed Rate Manta, Faisal; Artika, Kurnia Dwi; Gunawan, Gad
Sebatik Vol. 29 No. 1 (2025): June 2025
Publisher : STMIK Widya Cipta Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46984/sebatik.v29i1.2609

Abstract

The turning process in manufacturing is used as the formation of cylindrical components, threads and drilling. ST41 steel has the ability to form, weld and treat, so it is used as a material for tools and automotive components. Insert tools with long life (live time), resistance to wear and high temperatures are better than conventional tools, making the type of insert tool used for various cutting processes. The quality of turning is determined by the selection of cutting parameters that are appropriate to the type of material being cut and the tool used. Lathe parameters are feed rate, cutting speed, deep cut. Feed rate parameters affect process time, surface roughness and tool wear. The use of excessive feed rate causes surface roughness outside tolerance and large tool wear. Therefore, research on ST 41 steel with insert tools to obtain optimal parameters is needed. Research using the experimental study method aims to analyze the effect of tool wear values ​​on changes in feed motion and surface roughness. Turning of ST41 steel on a GUT C0636D X 1000 lathe, CCMT 060204 insert tool, 0.6mm depth cut, 300 rpm cutting speed and feed rate variation of 0.1620, 0.3250, 0.8120 mm/rev. The results of the study measured the tool wear value increasing against feed rate and surface roughness. The highest tool wear value is 0.021 grams, namely with a feed rate variation of 0.8120 mm/rev, a surface roughness of 8.961 μm is obtained. The lowest tool wear value is 0.005 grams, namely with a feed rate of 0.6120 mm/rev, a surface roughness of 5.300 μm is obtained.
Analisis Beban Pendinginan dengan Metode Cooling Load Temperature Difference pada Ruang Perkuliahan Gedung F Institut Teknologi Kalimantan Rachman, Fiqriza Hadista; Rizianiza, Illa; Gunawan, Gad; Sa’adiyah, Devy Setiorini
SPECTA Journal of Technology Vol. 7 No. 1 (2023): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (409.082 KB) | DOI: 10.35718/specta.v7i1.490

Abstract

The era of globalization requires humans to continue to innovate in developing technology. The comfort factors of a room are largely determined by the location, characteristics and activities in it. Determination of the amount of power in the Air Conditioner is carried out based on the amount of cooling load obtained. The method used is data the collection of the outside temperature, the measurement of the area of the component to be calculated, and the heat transfer coefficient for the components used. The results show that the cooling load in the 104F lecture room of 21,133 Watt of equivalent to 72,109 BTU/h. While the cooling load in the 105F lecture room, the results are 13,444 W or equivalent to 45,873 BTU/h. From that finding, it can be concluded that the power of the Air Conditioner used in the two rooms has not covered the amount of existing cooling, because the 104F lecture room has three Air Conditioners whereas one Air Conditioner has a power of 2 PK or equivalent to ±18,000 BTU/h, and 105F have two Air Conditioners with the same power. So that the cooling load of the two rooms is greater than the power of the Air Conditioner used.
DESIGN AND PERFORMANCE OF A 300-WATT HELICAL TYPE H-ROTOR WIND TURBINE Kurniawati, Diniar Mungil; Farhan, Alfandy Muhammad; Am, Chaerul Qalbi; Gunawan, Gad; Giyantara, Andhika
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i2.1983

Abstract

The Helical Type H-rotor turbine is a modification of the Darrieus turbine by Alexander Gorlov to improve the design of the H-Darrieus so the turbine can self-starting in low wind speed conditions. The purpose of this study is to analyze the pitch angle (5°, 0°, and -5°) when using the symmetrical airfoil (NACA 0018) on the performance of coefficient of power (CP), tip speed ratio (TSR) and coefficient of torque (CT) produced by Helical Type H-rotor turbine. The method used in this research is experimental investigation using wind tunnel.  The Helical Type H-rotor wind turbine is subjected to wind speed of 6 m/s. The results obtained show that the use of 0° pitch angle produces better CP, TSR and CT values than other pitch angles due to the angle of attack produced. this is due to the 0° pitch angle produces an angle of attack that is able to make a more optimal lift force on the turbine blade. At 0° pitch angle the CP value is 0.0337, TSR value is 1.5073 and CT value is 0.0224. While wind turbine that use -5° pitch angle produce better performance than wind turbine that use 5° pitch angle. However, the performance value of both (-5° and 5° pitch angle) is still below the wind turbine with 0° pitch angle.
Testing the Effect of Variation of Deflector Shapes on the Performance of the Three Blade Vertical Axis Savonius Water Turbine Gunawan, Gad; Susilo, Rizky Dwi; Kurniawati, Diniar Mungil
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (362.94 KB) | DOI: 10.32497/eksergi.v18i2.3273

Abstract

Hydropower is energy obtained from flowingwater and can be used for mechanical energy or electricalenergy. Electrical energy is energy that is used to fulfill humanneeds in life. The need for electrical energy in Indonesiacontinues to increase by an average of 3.9% from year to yearuntil 2050. There are various water sources in Kalimantansuch as water ditches, as well as reservoirs that have low-speedwater flow and the capacity to accommodate water levels thatare not too high. The Savonius water turbine can be utilized inthese conditions because it has the advantage of a simpleturbine construction, and is suitable for relatively low velocitywater flows. This study analyzes how well the Savonius waterturbine is by applying different deflector shapes. The methodapplied in this experiment is an experimental study using aSavonius turbine. The conclusion in this study is that applyinga deflector will improve turbine performance much better thannot using a deflector. Experiments by applying deflectors,namely convex deflectors, flat deflectors, and concavedeflectors, it was concluded that the application using aconcave deflector resulted in the highest rotational speedproduced by the turbine, the maximum value of turbine powerand the Savonius turbine coefficient of 206.3 rpm, 0.196 Wattand Cp = 0.124.
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
Analisis Daya Elektrik dan Efisiensi dengan Variasi Debit Air dan Sudut Kemiringan Turbin pada Turbin Ulir Archimedes Dua Sudu Ivan Christofel Hutabarat, Frans; Matarru, Andre Amba; Gunawan, Gad
Infotekmesin Vol 14 No 1 (2023): Infotekmesin: Januari, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i1.1610

Abstract

This study analyzes the effect of water discharge and the angle of inclination of the turbine on electrical power and efficiency using Archimedes screw turbine with two blades. This study aims to determine the effect of water discharge and the angle of inclination of the turbine on the electrical power and efficiency of the two-blade Archimedes screw turbine. The turbine is fed with water at variations of water discharge of 150 l/m, 300 l/m, 450 l/m. And vary angle of inclination of the turbine of 35°, 40°, and 45°. By using the variation of the water discharge that has been mentioned, the electrical power and efficiency obtained are 1,24 W and 9,78 % at a variation of 150 l/m, 2,89 W and 10,77 % at a variation of 300 l/m, and 3,65 W and 9,06 % at a variation of 450 l/m. When varying the angle of inclination, the electrical power and efficiency obtained are 3,33 W and 10,77 % on a slope of 35°, 3,65 W and 10,53 % on a slope of 40°, and 3,15 W and 8,6 % on a variation of 45°.
Assessment of disassembly difficulty level of lithium battery pack by integrating Ease of Disassembly Metric (eDiM) and difficulty rating approach Muqimuddin, Muqimuddin; Utomo, Dutho Suh; Farid, Nik Mohd; Armia, Iin; Dimyati, Aufar Fikri; Gunawan, Gad; Zamzani, Muhammad Imron
OPSI Vol 18 No 2 (2025): OPSI - December 2025
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v18i2.15580

Abstract

The demand for batteries is expected to rise in line with the growing need for electric vehicles. As the number of electric vehicles increases, more battery waste will be generated, considering the average battery lifespan is only 10 to 15 years. If batteries are not recycled, this will lead to a significant accumulation of waste. Therefore, it is important to evaluate the ease of battery disassembly. This assessment can help manufacturers design batteries that are easier to disassemble. This study aims to determine the disassembly ease score and provide improvement recommendations using the Ease of Disassembly approach through eDiM and Difficulty Rating. The disassembly process is analyzed using the Ease of Disassembly Metric (eDiM) to evaluate difficulty levels based on standard disassembly operation time, and Difficulty Rating based on the indicators of Accessibility, Positioning, and Force. Based on the analysis results, the most difficult disassembly operations involve removing screws from the top cover, bottom cover, controller circuit, and BMS circuit, as well as detaching the nickel strip. The research findings indicate the presence of disassembly stages with low time values but high preference-based difficulty levels.
Co-Authors Achmad Fahrizul Hasmi Achmad Farizul Hasmi Agung Prabowo Alfi Nandar Am, Chaerul Qalbi Andre Amba Matarru Anzan Aulia Yahya Armia, Iin Aufar Fikri Dimyati Bagas Hendi Prasetya Chaerul Qalbi Chaerul Qalbi AM Chandra Suryani Rahendaputri Cloudiandy Mukti Kimana Devy Setiorini Sa’adiyah Dhio Stofani Diana Nurlaily Dicky Ocza Tama Dimas Rizqi Fahrezi Djafar, Alfian Dutho Suh Utomo Faadhilah Faadhilah Farhan, Alfandy Muhammad Farid, Nik Mohd Febrillian Bima Jagad Saksana Felita Tsany Pandya Frans Ivan Christofel Hutabarat Giyantara, Andhika Gofind Hasoloan Happy Aprilia Haryono, Hadhimas Dwi Hasyer Kamal Baron Wicaksono Hosea, Richard Marbun I Made Ivan Wiyarta Cakra Sujana Idhil Ismail, Andi Ivan Christofel Hutabarat, Frans Jefri Aldo Kevin Hasiholan Lumban Tobing Kurnia Dwi Artika, Kurnia Dwi Kurniawati, Diniar Mungil Lantiunga Celine Agvi Sanchia Linda Manta, Faisal Maulana Bayu Iqmal Muhammad Hariz Dedy Sayogi Muhammad Irwan Gunawan Muhammad Syaiful Umara Muqimuddin Muqimuddin Naufal Akmal Oddy Adam Permana, Diki Ismail Pradisty, Daffa Kurnia Rachman, Fiqriza Hadista Rahma Sarita Dewi Razif Mahmudi Syahlie Ricko Orientius Paseru Ridhwan Haliq Ridhwan Haliq Rifqi Al Wafi Rifqi Al Wafi Rijal Surya Rahmany rizianiza, illa Rukayya Syakira Suanggana, Doddy Suardi Suardi Susilo, Rizky Dwi Tina Febriana Usman Ali Widyantama, Fakhrul Yonathan Parsaulian Lobo Silalahi Yongki Christandi Batubara Yun Tonce Kusuma Priyanto Zamzani, Muhammad Imron