Garuda - Garba Rujukan Digital

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

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.

Electrochemical Characterization Techniques for Performance Optimization in Dye-sensitized Solar Cells: A Narrative Review Purnomo, Agung; Aziizudin, Achmad; S, Arbye; Yogiswara, Cahyo Wibi; Halim, Dimas Ardiansyah; Putra, Setya Drana Harry
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 6 No 3 (2024): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/motivection.v6i3.351

Dye-sensitized solar cells (DSSCs) offer advantages such as low production costs, simple fabrication methods, and reduced toxicity compared to silicon-based solar cells, although their efficiency remains a major limitation. The aim of this review is to discuss the fundamental principles of DSSCs and evaluate the electrochemical techniques used to optimize their performance. The method employed is a narrative literature review, allowing the author to synthesize relevant literature from various sources. Current-voltage (I-V) measurements and electrochemical impedance spectroscopy (EIS) are identified as the primary tools for assessing DSSC efficiency and quality. The findings indicate that I-V measurements provide critical metrics such as efficiency and fill factor, while EIS helps identify charge transfer resistance and improves cell stability. Techniques such as voltammetry and Tafel polarization plots offer additional insights into catalytic activity and diffusivity. This review underscores the importance of electrochemical characterization in supporting efficiency improvements and the development of new materials, with EIS playing a key role in modelling cell morphology through equivalent circuit analysis.

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

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.

PENGARUH THREE QUARTER BAFFLE TERHADAP LAJU PERPINDAHAN KALOR DAN DAYA POMPA PADA KONDENSOR VERTIKAL Yogiswara, Cahyo Wibi; Fauzun; Taufiqurrahman, Muhammad Salim
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 2 (2025): SJME Kinematika Desember 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i2.730

A condenser is a heat exchanger that functions to convert vapor into liquid. One of the most commonly used of condensers is the shell and tube. This study was conducted on a laboratory-scale vertical condenser to determine the heat transfer coefficient, pressure drop, and the ratio of heat transfer rate to the required pump power. In this study, variations were made in four types of baffles and three mass flow rate ratios. The baffle types used include segmental, disc and doughnut, and three-quarter with 90° and 180° configurations. Meanwhile, the mass flow rate ratio was varied based on theoretical values, namely 90%, 100%, and 110% of the theoretical value. The condenser used is a shell and tube, where the hot fluid flows through the tube, and the cold fluid flows through the shell. Experimental results show that variations in baffle type and mass flow rate ratio significantly affect the heat transfer coefficient and the ratio of heat transfer rate to pump power. The three-quarter baffle with a 90° configuration demonstrated the best performance, with a heat transfer coefficient of 83.27 W/m²°C and a heat transfer rate-to-pump power ratio of 1.64 at a water flow rate of 2.2 GPM.

Design of Universal Jig for Standardization and Efficiency of Frame Production Chopper Motorcycle Halim, Dimas Ardiansyah; Murdiono, Mohamad Bimo; Suparno, Joko; Aziizudin, Achmad; Purnomo, Agung; S, Arbye; Yogiswara, Cahyo Wibi; Putra, Setya Drana Harry
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 11, No 2 (2025): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v11i2.28487

Chopper motorcycle frames had a fierce and macho impression on users. The frame was characterized by high handlebars, long front legs and a low seat. Chopper motorcycles were suitable for casual riding. Therefore, the Chopper frame must be specially designed or custom-made. Making the frame required a jig to maintain precision and dimensional accuracy in accordance with the original frame. Making a universal jig allowed craftsmen to make Chopper frames according to market demand without leaving the center balance on the frame. The jig manufacturing process included material selection, measurement, material cutting, machining, jig calibration, jig assembly, welding, checking and finishing. The welding process used argon TIG welding. The use of the jig shortened the frame manufacturing time by 2 times faster and minimizes wasted frame material due to dimensional errors.

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

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

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.

Title

Found 7 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 7 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 7 Documents
Search