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Khairul Anam
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Redaksi International Journal of Mechanical Engineering Technologies and Applications (MECHTA), Jurusan Teknik Mesin Fakultas Teknik, Universitas Brawijaya Jl. MT. Haryono 167 Malang, Jawa Timur Indonesia 65145
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International Journal of Mechanical Engineering Technologies and Applications (MECHTA)
Published by Universitas Brawijaya
ISSN : -     EISSN : 27223213     DOI : https://doi.org/10.21776/ub.mechta
Core Subject : Science, Engineering,
Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering
International Journal of Mechanical Engineering Technologies and Applications (MECHTA) is published by Mechanical Engineering Department, Engineering Faculty, Brawijaya University, Malang, East Java, Indonesia. MECHTA is an open-access peer-reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. MECHTA accepts submissions from all over the world, especially from Indonesia. MECHTA aims to provide a forum for international academicians, researchers, and practitioners on mechanical engineering to publish the original articles. All accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage. The scope of MECHTA is specific topics issues in mechanical engineering such as design, energy conversion, manufacture, and metallurgy. All articles submitted to this journal can be written in the English Language.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 244 Documents
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DECREASING ELECTRICAL ENERGY COST AND INDIRECT CO2 EMISSIONS OF AN AIR CONDITIONING UNIT AFTER PREVENTIVE MAINTENANCE Risonarta, Victor Yuardi; Widodo, Agung Sugeng
International Journal of Mechanical Engineering Technologies and Applications Vol. 5 No. 2 (2024)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2024.005.02.9

Abstract

During the summer season in subtropical countries and the dry season in tropical countries, air temperature is high. To adapt this condition, an air conditioning (AC) unit is used. The air conditioning use, however, increases the electrical energy consumption which contributes to the increase of indirect CO2 emissions. For many buildings, a monthly electrical energy cost from the use of AC system can contribute up to 40% of a monthly utility expenditure. It is then a great motivation to decrease electrical energy consumption of the AC unit. In this work, an adaptable preventive maintenance for an AC unit shows an acceptable level of electrical energy decrease. An experiment was performed for 2 AC types. The first one is a wall mounted unit with a cooling capacity of 9,300 BTUH.  The second unit is a split duct unit with a cooling capacity of 48,000 BTUH. The cleaning of evaporator in the wall-mounted AC unit decreased the hourly electrical energy consumption by 4.1% from 810 to 777 Watt-hour. In addition, cleaning of condenser for the similar AC unit decreased the electrical energy consumption by 6.2% from 810 to 760 Watt-hour. Meanwhile, the evaporator cleaning for a 48,000 split duct AC decreased the hourly electrical energy consumption by 2.4% from 4.64 to 4.53 kWh and cleaning of condenser decreased the energy consumption by 5.4% from 4.64 to 4.39 kWh. If this electrical energy decrease could be scaled up to the global energy consumption from the air conditioning use, this should be a significant decrease of the global energy consumption and the correlated indirect CO2 emissions from the air conditioning sector.
COOLING LOAD ANALYSIS IN THE CENTRAL SURGERY ROOM OF SULTAN IMANUDDIN HOSPITAL PANGKALAN BUN BASED ON THE REGULATION OF THE MINISTER OF HEALTH OF THE REPUBLIC OF INDONESIA NUMBER 7/MENKES/2019 Khusnaini, Alfan; Aspiansyah, Aspiansyah; Harianto, Agus; Handoyo, Budi; Munajat, Cecep
International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 2 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2020.001.02.10

Abstract

In Sultan Imanuddin Hospital's central surgical room, analyzing the cooling load is essential to maintaining optimal working conditions for medical procedures. This study aimed to evaluate the efficacy of the cooling system in the surgical room according to the Republic of Indonesia's Minister of Health Regulation Number 7 of 2019. The investigation measured the cooling load required to maintain the room temperature within established health standards. The central surgical room was found to have a cooling load of 4301.462 kcal/h, equivalent to 17059.60 Btu/h. The hospital's air conditioning system, with a capacity of 2 PK or 18000 Btu/h, was determined to be sufficient to handle this load, providing a margin of 940.4 Btu/h. These findings enhance our understanding of the hospital's cooling system and offer recommendations to ensure that patients and medical personnel receive high-quality, safe care.
Influence of Co-Firing PKS (Palm Kernel Shell) with Coal on Boiler Efficiency Combustor Type: Reciprocating Servo Grate Tratama, Teddy; Aspiyansyah, Aspiyansyah; Harianto, Agus; Budi, Agung Prasetyo
International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 2 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2020.001.02.6

Abstract

Biomass fuel, recognized for its renewable and environmentally friendly characteristics, presents an attractive option for energy production. This study explores a co-firing system incorporating palm kernel shell (PKS) and coal as fuel feeds for a boiler, aiming to optimize energy production and reduce gas emissions. The influence of co-firing PKS with coal on fuel feed rate and boiler efficiency was analyzed. Boiler efficiency measurements and calculations were conducted using the indirect method. The fuels were co-fired in various ratios: 65:35, 60:40, 55:45, and 50:50 (PKS). The results show that increasing the coal ratio in the fuel blend reduces the fuel feed rate and increases boiler efficiency. The optimized co-firing ratio of PKS to coal was determined to be 60:40, achieving a maximum boiler efficiency of 55.38%.
Analysis of Permeability and Compressive Strength of Local Sand of West Kotawaringan District as Molding Sand in Metal Casting Aspiyansyah, Aspiyansyah; Harianto, Agus; Mustofa, Edi
International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 2 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2020.001.02.7

Abstract

Sand is the most widely used material as a molding material in the metal casting process. Sand can be used as a molding medium if it meets the requirements, including good formability and good permeability. This research was conducted by examining West Kotawaringin local sand by providing several tests, which include a clay content test, a water content test, a formability test, and a permeability test. The test results for local sand showed that the permeability value of sand was 0.001-0.032 cm/sec and the compressive strength value of sand was 0.073-0.126 kg/cm2. These results show that the local sand of West Kotawaringin meets the requirements of molding sand so that it can be used as molding sand in metal casting.
Effect of Ferrite Bead on Honda Suprafit 100 CC Engine Performance Makinun, Makinun; Masruri, Thohir; Fauzi, Agus Muhammad; Rastoto, Nur Dyan Enggar
International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 2 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2020.001.02.9

Abstract

Ferrite beads, ceramic compounds made from iron oxide powder, have been shown to enhance the performance of gasoline engines using premium fuel, pertalite, and pertamax. This research demonstrated that installing ferrite beads in the ignition system of gasoline engines led to improvements in power, torque, acceleration time, and the efficiency of the spark plug ignition system. These findings suggest that ferrite beads can boost engine performance without compromising the quality of the combustion process.
ANALYSIS OF OIL CHARACTERISTICS FROM PYROLYSIS OF LOW DENSITY POLYETHYLENE (LDPE) PLASTIC WASTE IN A SMALL CAPACITY REACTOR Purnama, Ari; Effendy, Marwan; Ngafwan, Ngafwan
International Journal of Mechanical Engineering Technologies and Applications Vol. 5 No. 2 (2024)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2024.005.02.10

Abstract

Plastic waste in Indonesia remains a significant unresolved issue, particularly due to the extensive use of plastic bags in the food sector, industry, and other areas, which adversely affects the environment. Addressing this, one effective approach is converting plastic waste into fuel oil through the pyrolysis process. The process involves preparing pyrolysis equipment and extracting oil by conducting laboratory tests on the properties of pyrolysis oil, including Gas Chromatography-Mass Spectrometry (GCMS), Fourier Transform Infrared (FTIR) spectroscopy, and droplet combustion tests. Pyrolysis is performed by heating plastic waste at temperatures ranging from 250°C to 400°C. This study focuses on pyrolysis oil derived from Low-Density Polyethylene (LDPE) plastic, which can be used as an alternative fuel. The results show that pyrolysis oil can be ignited with sparks at a heating temperature of 300°C, exhibiting a viscosity of 1.1378 cP and a calorific value of 10,965.2 cal/g.
Performance Enhancement of a 2-Cylinder Engine with Naphthalene Addition to RON 90 Hariyadi, Muhammad Arif; Aspiyansyah, Aspiyansyah; Harianto, Agus; Pratama, Rubi
International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 2 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2020.001.02.8

Abstract

The octane number of fuel is crucial for the performance of a two-cylinder gasoline engine. This study aims to enhance the octane number by using naphthalene. The method involved mixing RON 90 gasoline with naphthalene to evaluate engine performance parameters, including torque, power, specific fuel consumption, and efficiency. The results indicate that adding 20 mg of naphthalene to 1 liter of RON 90 gasoline optimizes the performance of a two-cylinder gasoline motorcycle engine.
ROTARY SOOT BLOWING TREATMENT INCREASES EFFECTIVENESS OF ECONOMIZER CAPACITY OF 58.5 TPH AT PT SBI INDONESIA Harianto, Agus; Aspiyansyah, Aspiyansyah; Rahman, Muhammad Muksin Galih
International Journal of Mechanical Engineering Technologies and Applications Vol. 5 No. 2 (2024)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2024.005.02.11

Abstract

In an industrial era that increasingly prioritizes energy efficiency and environmental sustainability, optimizing the use of energy in the production process is crucial. One of the key aspects of achieving this goal is utilizing waste heat to improve the overall efficiency of the system. In this context, the use of economizers has become a major focus in the boiler industry. PT Surya Borneo Industri (SBI), as an industrial entity committed to energy efficiency and environmental sustainability, has adopted the latest technology in a bid to improve the performance of their boiler system. One of the latest innovations they have implemented is the use of rotary soot blowing, an automated device designed to clean the heat exchanger surfaces in the economizer. This study aims to determine the effectiveness value of the economizer before and after the rotary soot blowing treatment on the PT SBI boiler system. Through a series of field observations and data analysis, this research reveals the potential benefits of using rotary soot blowing in improving thermal efficiency, reducing energy losses, and contributing to the sustainability of industrial operations. The results obtained showed that the economizer effectiveness value before the rotary soot blowing treatment was 55, 54, 55, and 54%, and after the rotary soot blowing treatment, the effectiveness value increased to 59, 60, 61, and 60%. This is due to maintenance activities, namely cleaning dust or soot attached to the economizer pipes.
SUPERHYDROPHOBIC AND ANTIBACTERIAL COATINGS ON VARIOUS COTTON FABRICS USING ZNO AND AESO Wijaya, Hastono; Gapsari, Femiana; Sulaiman, Abdul M.; Harmayanti, Afifah; Barasa, Alvadro; Andrean, Janu; Warman, Sa Bashkaran Adi; Kriswardhana, Willy; Naimah, Azimatun
International Journal of Mechanical Engineering Technologies and Applications Vol. 5 No. 2 (2024)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2024.005.02.12

Abstract

Superhydrophobic coatings on cotton utilized in medical applications like hospital gowns and bed linens to offer a protective barrier against fluids and bacteria. Masks were worn with different types of materials. In this study, various cotton employed ZnO and AESO to effectively decrease the surface energy of cotton fabric via a Schiff base reaction. This chemical transformation resulted in the formation of a textured surface structure that exhibited robust adhesion qualities. The study demonstrates that the superhydrophobic coating on silk fabric increases 153. 59%. The coating on silk provides a reference for fabric types with ZnO and AESO coatings.
THE PREDICTION OF HYDROGEN EVOLUTION REACTION FROM DYNAMIC MAGNETIC FIELD ASSISTED WATER ELECTROLYSIS ARTIFICIAL NEURAL NETWORK Nugroho, Willy Satrio; Purnami, Purnami; Schulze, Ajani Aiman; Anggara, Teuku; Schulze, Klauss
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.01.1

Abstract

This study explores the prediction of Hydrogen Evolution Reaction (HER) performance in Dynamic Magnetic Field (DMF) assisted water electrolysis using Artificial Neural Networks (ANN). The integration of ANN models with experimental data from DMF-assisted electrolysis provides valuable insights into the complex interplay between magnetic fields and electrochemical processes. The results show significant enhancements in HER rates compared to conventional electrolysis, with static magnetic fields also contributing to performance improvements. The ANN models developed exhibit high accuracy in predicting HER performance under varying DMF rotational speeds, as evidenced by low Mean Squared Error (MSE), Root Mean Squared Error (RMSE), and high R-squared values, demonstrating their strong predictive power and reliability. However, caution is advised regarding overfitting, and future research should focus on incorporating techniques like regularization and cross-validation to enhance model generalization. This study lays the foundation for further optimization of efficient hydrogen production technologies in the context of sustainable energy solutions.

Page 10 of 25 | Total Record : 244

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