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All Journal Jurnal Penelitian Saintek Sainteknol : Jurnal Sains dan Teknologi Rekayasa Mesin Prosiding Semnastek Jurnal Rekayasa Mesin Jurnal Teknologi Terapan Infotekmesin Scientific Journal of Mechanical Engineering Kinematika Journal of Mechanical Design and Testing (JMDT) METAL : Jurnal Sistem Mekanik dan Termal Prosiding Seminar Nasional Teknologi Industri Berkelanjutan Journal of Applied Science and Advanced Engineering
Fauzun Fauzun
Department Of Mechanical And Industrial Engineering, Faculty Of Engineering, Universitas Gadjah Mada. Jl. Grafika No. 2, Kompleks UGM, Yogyakarta 55281, Indonesia
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Numerical Analysis of the Coal Mixture Composition Effects on Combustion and Gas Emissions in CFB Boiler Santoso, Santoso; Fauzun, Fauzun
Journal of Applied Science and Advanced Engineering Vol. 2 No. 1 (2024): JASAE: March 2024
Publisher : Master Program in Mechanical Engineering, Gunadarma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59097/jasae.v2i1.24

Abstract

The combustion system in the CFB boiler had a high complexity, in order to identify and understand the combustion process that occurs in the CFB boiler, CFD analysis was applied. This study was conducted to analyze the combustion and gas emissions produced in a CFB boiler with several variations of coal mixture. Coal particles injected into the furnace were modeled with DPM, specifically the Euler-Lagrange approach. The coal used came from two coal mining industries and mixed with the percentages of 20% : 80%, 30% : 70% and 40% : 60%. The amounts and conditions of combustion air and coal had been determined. The simulation process in the CFB boiler was carried out at a maximum load (110 MWe) without involving bed material. The results showed that the energy and combustion temperature produced in the mixture of 20% : 80% reached the highest value, the mixture of 40% : 60% produced the highest concentration of H2O and produced the lowest concentrations of CO2, O2, NO and SO2. On the other hand, the distribution of pressure and gas velocity had relatively the same value in each mixture. This could be caused by the characteristics of coal mixture, the amount of air and coal injected, and the absence of bed material.
SIMULASI CFD PROSES PERPINDAHAN PANAS PADA MESIN PENGERING SOHUN KAPASITAS 20 KG DENGAN VARIASI BUKAAN DAMPER Fauzun, Fauzun; Tamtomo, Danang Eko; Rahman, Muhammad Aulia; Hidayat, Akbar Fadhlurrohman; Yogiswara, Cahyo Wibi
Jurnal Teknologi Terapan Vol 11, No 1 (2025): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v11i1.587

Abstract

Drying machines have a vital role in food products drying for packaging to avoid bacteria contamination and ensure its durability. A properly designed dryer is utterly fundamental to maintaining adequate drying capacity, especially to overcome the ever-changing weather. In aiming for the pre-described drying rate, numbers of parameters need to be considered, such as the drying temperature, airflow speed, temperature distribution, and humidity. Henceforth, a comprehensive study considering all these parameters is necessary during the dryer machine design process. Employing numerical simulation is a solution to reduce the required cost and time from the experimental approach. This study proposed a set of vermicelli dryer designs with various inlet and outlet damper openings of 30%, 45%, and 60%. The study shows that the openings affect the temperature gradient and drying rate. The most optimum design is obtained at the damper opening of 30%, whereby the drying time, temperature gradient, and vermicelli temperature of 23,99 minutes, 2,98 oC and 57,9 oC respectively.
Studi Eksperimental Performa Perpindahan Kalor Sistem Pendinginan Single Phase Immersion Cooling untuk Data Center Janan, Garda Naufal; Pranoto, Indro; Fauzun, Fauzun
Prosiding SENASTITAN: Seminar Nasional Teknologi Industri Berkelanjutan Prosiding SENASTITAN Vol. 05 2025
Publisher : Institut Teknologi Adhi Tama Surabaya

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Abstract

Data Center (DC) saat ini menjadi infrastruktur yang sangat penting. Namun, DC juga mengonsumsi sekitar 3% dari total listrik global, dan angka ini diperkirakan akan meningkat hingga 12%, di mana 45% dari konsumsi listrik DC dialokasikan untuk sistem pendinginan. Oleh karena itu, pengembangan dan pengoptimalan sistem pendingin untuk DC menjadi perhatian yang sangat krusial. Penelitian ini melakukan uji coba eksperimental untuk mengevaluasi kinerja sistem pendinginan menggunakan metode immersion cooling pada data center. Data center ditempatkan di dalam sebuah chamber yang berisi fluida dielektrik yang dialirkan dengan bantuan pompa. Penelitian ini bertujuan membandingkan kinerja metode fan cooling dengan immersion cooling. Hasil penelitian mengungkapkan bahwa temperatur CPU lebih rendah ketika menggunakan metode immersion cooling dibandingkan fan cooling. Selain itu, nilai heat transfer coefficient immersion cooling lebih tinggi. Secara keseluruhan, metode immersion cooling menunjukkan performa pendinginan yang lebih optimal dibandingkan dengan metode fan cooling. Selain itu, berdasarkan pemantauan efisiensi daya listrik melalui nilai PUE, immersion cooling terbukti lebih hemat energi dibandingkan fan cooling. Temuan ini menegaskan bahwa immersion cooling dapat menjadi alternatif solusi pendinginan yang lebih unggul bagi DC, baik dari segi kinerja termal maupun efisiensi energi, sehingga mampu mengatasi tantangan dalam sistem pendinginan konvensional.
Analisis Numerik dan Eksperimental Performa Annular Heater dengan Variasi Jumlah Axial Fin Insert dan Mass Flow Rate Ardama, Muhammad Galih; Fauzun, Fauzun
Prosiding SENASTITAN: Seminar Nasional Teknologi Industri Berkelanjutan Prosiding SENASTITAN Vol. 05 2025
Publisher : Institut Teknologi Adhi Tama Surabaya

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Abstract

Sistem annular heater memegang peranan penting dalam berbagai aplikasi industri, terutama dalam meningkatkan efisiensi energi melalui kontrol panas yang efektif. Penelitian sebelumnya telah menunjukkan bahwa modifikasi geometri pada annular heater, seperti penambahan rectangular wire coil dan outsert, dapat mempengaruhi kinerja perpindahan panas secara signifikan. Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi jumlah axial fin insert dengan variasi plain tube, 2, 3, 4, dan 5 buah yang dioperasikan pada mass flow rate yang beragam (0,1 kg/s, 0,2 kg/s, 0,3 kg/s, dan 0,4 kg/s) terhadap kinerja perpindahan panas pada annular heater. Metode yang digunakan melibatkan simulasi numerik menggunakan Computational Fluid Dynamics (CFD), yang divalidasi dengan data eksperimental. Hasil penelitian menunjukkan bahwa validasi antara eksperimen dan simulasi menunjukkan deviasi sebesar 2,9%. Peningkatan mass flow rate pada annular heater meningkatkan bilangan Reynolds dan Nusselt, yang memengaruhi karakteristik aliran dan perpindahan panas fluida di sisi annulus. Untuk meningkatkan kinerja perpindahan panas, dilakukan modifikasi desain dengan empat variasi jumlah axial fin insert, yang dapat meningkatkan nilai koefisien perpindahan kalor lebih tinggi dibandingkan desain konvensional (plain tube), meskipun terjadi peningkatan pressure drop. Studi ini menunjukkan bahwa desain annular heater dengan penambahan empat buah axial fin insert memberikan performa terbaik, menghasilkan rasio perpindahan kalor terhadap pressure drop sebesar 21,005 W/m².K.Pa pada mass flow rate 0,1 kg/s. Rasio perpindahan kalor terhadap pressure drop relatif stabil untuk berbagai variasi geometri axial fin insert, sehingga desain ini memiliki potensi signifikan dalam meningkatkan kinerja perpindahan kalor annular heater.
Studi Numerik Kontur Pola Aliran Fluida Pendinginan Pada Mold Injeksi Molding Bagus Prasetiyo, Angger; Fauzun, Fauzun; Asyratul Azmi, Azhim; Ilmal Yaqin, Rizqi
Infotekmesin Vol 12 No 1 (2021): Infotekmesin: Januari 2021
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v12i1.493

Abstract

The conventional cooling process was chosen because of the better estimation of manufacturing times and lower manufacturing costs. One alternative to minimize the decline in quality in plastic products is by using a conformal cooling process. This study will compare the contours of the fluid flow pattern between conventional cooling channels and conformal cooling channels. Case study on a box-shaped product made of PP material which has a melt temperature of 205 ° C. 3D product images were made with Solidwork 2017 software and process simulation using fluent 19.0 software. The results showed that the temperature flow pattern in the conformal channel resulted in a temperature absorption of around 303.2K while the conventional cooling channel was around 302.5K. Then the coolant channel that experiences high pressure drop occurs in the conformal cooling channel around 88888.9 pascals and the conventional cooling channel around 355555.6 pascals.
STUDI NUMERIK EFEK LETAK AIR SUPPLY DIFFUSERS DAN AIR RETURN GRILLES PADA DISTRIBUSI TEMPERATUR DAN KECEPATAN UDARA DI BUS Fauzun, Fauzun; Hidayat, Akbar Fadhlurrohman; Yogiswara, Cahyo Wibi
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1606

Abstract

The purpose of air conditioning system in the vehicle is to provide comfort for passengers. To achieve this, it is required to investigate the air flow and temperature distribution in the passenger area. This study aims to find the effect of layout variations of the air supply diffuser and air return grille on the temperature and velocity distribution in the passenger compartment of a bus and get the most optimal system with CFD simulation method that used ANSYS Fluent. The number of layout variations that simulated is six. The results can be inferred that the variation with one air supply diffuser at the floor or sidewall and the air return grille located on the bottom sidewall will result in lower temperature distribution. Then, it will make lower average air velocity at the top of the compartment. Considering nonuniformity index and heat removal efficiency, the most optimal scheme system is owned with one air supply diffuser on the sidewall, another on the ceiling, and the air return grille on the bottom sidewall.
NUMERICAL ANALYSIS OF GILL AND COOLING DUCT ADDITION ON SIDEPOD OF FORMULA STUDENT RACING CAR TYPE Fauzun, Fauzun; Yudhistira, Thareq Akbar Arya; Yogiswara, Cahyo Wibi; Hidayat, Akbar Fadhlurrohman
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1624

Abstract

Formula Student SAE (FSAE) car is designed to optimize the engine performance to achieve maximum power. To get the maximum power, the work of the car is very vulnerable to over-heating problems. Prevention step of overheating problems can be done by optimizing radiator cooling system performance. It is needed a design that can maximize radiator cooling performance by maximizing the supply of airflow through the radiator using the aerodynamic system in the car. The sidepod geometry with the addition of gills and cooling duct is specifically investigated to produce best airflow to maximize radiator cooling performance and optimize the car's aerodynamic system. This research investigates how modifications to the sidepod geometry, including the addition of gills and cooling ducts, can improve airflow and heat transfer to maximize radiator cooling performance and enhance the car's aerodynamic system. The value of the heat transfer rate, lift coefficient, and drag coefficient of the car were investigated using ANSYS Fluent. Furthermore, the Existing Sidepod design was evaluated and the results will be taken as the forthcoming development of the new sidepod designs. Adding geometry to the sidepod proves can affect the value of the heat transfer rate, lift coefficient, and drag coefficient. The addition of geometry in the form of outlet gills and cooling duct has been proven to increase the value of heat transfer rate and reduce the value of lift coefficient and drag coefficient. While the addition of inlet gills only increases the value of the heat transfer rate and reduces lift coefficient without reducing drag coefficient. The best performance from all aspects reviewed was obtained by giving geometry on the sidepod is the outlet gills. This method offers a novel approach to optimizing sidepod designs in Formula Student Cars, contributing to both performance and efficiency advancements.
STUDI EKSPERIMENTAL PERBANDINGAN KINERJA PENDINGINAN IMERSI DAN UDARA UNTUK DATA CENTER Andreas Argo Daru; Indro Pranoto; Fauzun Fauzun
Scientific Journal of Mechanical Engineering Kinematika Vol 11 No 2 (2026): SJME Kinematika December 2026
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v11i2.915

Abstract

The efficiency with conventional air cooling systems in controlling surplus heat has reached its limits due to the growing computing load in data centers. On a server with a 100% workload, this study compares the thermal performance and energy efficiency of air cooling and single-phase immersion cooling systems. An experimental test utilized Shell S3X dielectric fluid at a steady flow rate of 1.75 LPM to simultaneously cool an Intel Xeon E-2336 CPU and an Nvidia RTX A400 GPU. The findings demonstrate that immersion cooling significantly lowered operating temperatures by 17.50% for the GPU from 80.0 °C to 66.0 °C and by 35.53% for the CPU from 76.0 °C to 49.0 °C. This performance improvement is caused by a large increase in the convective heat transfer coefficient of up to 157.37% compared to conventional air cooling, which directly reduces the system's thermal resistance by up to 60.81%. In terms of energy efficiency, immersion cooling achieved a Power Usage Effectiveness score of 1.04, compared to 1.69 for the air system, and a Cooling Performance Index of 15.76.
Co-Authors Abrar Ridwan Adhika Widyaparaga Ahmad, Shaleh Andreas Argo Daru Angger Bagus Prasetiyo Ardama, Muhammad Galih Asyratul Azmi, Azhim Azhim Asyratul Azmi Azhim Azyratul Azmi Bobie Suhendra Dannys Arif Kusuma Deendarlianto Furqanul Fikri Harwin Saptoadi Hery Mada Indra Paska Hidayat, Akbar Fadhlurrohman Ilmal Yaqin, Rizqi Indarto Indarto Indro Pranoto Janan, Garda Naufal Mohammad Hamdi, Mohammad Muhammad Aulia Rahman Ridwan Abdurrahman Rizqi Ilmal Yaqin SANTOSO SANTOSO Sena, Boni Sigit Haryo Pranoto Tadashi Ariga, Tadashi Tamtomo, Danang Eko Teguh Wibowo Widi Widayat Yogiswara, Cahyo Wibi Yudhistira, Thareq Akbar Arya