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Hamdan Akbar Notonegoro
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FLYWHEEL : Jurnal Teknik Mesin Untirta
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 24077852     EISSN : 25977083     DOI : https://doi.org/10.36055/fwl.v0i0.
Core Subject : Science, Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
The journal publishes original and (mini)review articles covering the concepts of materials science, mechanics, kinematics, thermodynamics, energy and environment, mechatronics and robotics, fluid mechanics, tribology, cybernetics, industrial engineering and structural analysis. The journal follows new trends and progress proven practice in the mechanical engineering and also in the closely related sciences as are electrical, civil and process engineering, medicine, microbiology, ecology, agriculture, transport systems, aviation, and others, thus creating a unique forum for interdisciplinary or multidisciplinary dialogue.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 5 Documents
 1 
Search results for , issue "Volume 7, Issue 2, October 2021" : 5 Documents clear
The Copper Influence into Physical and Mechanical Properties of the Al-5Si Alloy Isom Mudzakir, MSi.; Suhariyanto Suhariyanto; Renanto Putra Wijaya; Hamdan Akbar Notonegoro; Bambang Soegijono
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 7, Issue 2, October 2021
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.12566

Abstract

The microstructure and the hardness due to addition of copper of the Al-Si-Zn-Mg-Cu Alloy have been investigated. The copper has been varied from 0 wt.%– 4.9 wt.% in order to see how the microstructure and the hardness of the alloy change. The Heat treatment at temperature 510 oC during 5 hours and then cooling to ambient temperature, have done to foster the dissolution of copper in the crystal and then precipitate during cooling. The results show that the alloying element form a phase distributed in the matrix of the alloy. Increasing the content of the copper makes the form of the second phase smaller and at the matrix show fine particle distributed mostly entire of the surface. The hardness of the alloy increase as the copper content increase. The increase in hardness might come from the fine particle distributed in the matrix. The onset, endset and melting temperature tend to decrease as the copper content increase.
Development of Single Layer Edible Film Composite from Chitosan Nanoparticles-based as Fruit Packaging Materials Egi Erlangga; Agus Pramono; Endarto Yudo Wardhono
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 7, Issue 2, October 2021
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.12560

Abstract

This experiment was conducted to develop chitosan-based edible films and chitosan nanoparticles with cellulose nanocrystals (CNCs) as stabilizers and fillers. Chitosan nanoparticles were synthesized based on ionic cross-linking with sodium tripolyphosphate and glycerol as plasticizer. The experiment began with making 1% w/v chitosan solution, stirred using a magnetic stirrer at 300 rpm for 24 hours then making CNP-TPP colloid solution, the chitosan solution was heated at 50 oC then added TPP solution with a concentration of 5% as much as 20% by weight. dry chitosan dropwise under constant stirring at 1000 rpm using a magnetic stirrer for five minutes. Making CNP-TPP-CNC-KMnO4 matrix, CNP-TPP colloid solution, added glycerol solution with variations of 5,10 and 15% w/w dry chitosan base and added CNC with variation 1-5% w/w dry chitosan base, stirred at 300 rpm for 30 minutes at room temperature. 8% w/w of dry chitosan base was added with KMnO4 at a temperature of 50 oC under constant stirring at 1000 rpm for five minutes. The film solution was poured into a petri dish and then heated using an oven at 62 oC for 12 hours. Various properties were characterized, mechanical properties and functional group characterization. The experimental results determined the optimum results of the film tensile strength test at 5% CNC and 10% glycerol variations. The tensile strength of the composite film reached a maximum value of 464.1 Mpa on a chitosan-based film and 266.3 MPa on a nano chitosan-based film. The addition of active agent KMnO4 as much as 8% can reduce the value of tensile strength by 46.3%.
Spraying Agricultural Crops Based on Internet of Things (IoT) Shofiatul Ula, M.Eng.; Sidik Susilo; Erny Listijorini; Raka Irawan; Aceng Sambas; Aldis Tia Assidiq
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 7, Issue 2, October 2021
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.12847

Abstract

Indonesia's Agriculture is a strategic sector in increasing economic growth. One of the efforts to increase agricultural production in Indonesia is through technology. Smart farming models can be developed to improve the efficiency and effectiveness of farmland management. The monitoring and watering regulation system using IOT has many benefits, including time efficiency, work effectiveness, remote operation, simplicity, and better irrigation accuracy. In this study, the Smart Farming Device was placed in a coastal area with a hot climate in the chili garden. The experiment was conducted 9 hours from 08.00 – 17.00 WIB (West Indonesian Time). The Smart Farming Device works in a modular manner controlled remotely by the internet network, which works by energy converted from the sunlight. The use of types of sensors and the sensors placed on the farmland will determine the accuracy of the information received by farmers. From the sensors parameter, we found that spraying water to the farmland does not raise the soil moisture. A wind speed sensor needs to be added to the device to determine the effect of wind blow on the environmental parameters of the farmland. The irrigation method looks more promising for improving soil moisture conditions than the method of spraying water through the air. 
Numerical Analysis of the Effect of Serrated Fin to the Heat Transfer in the Condenser Lohdy Diana; Febrian Kusumawardani; Wahyu Nur Fadilah; Muhammad Nabiel Ariansyah; Muhammad Farid Irfianto
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 7, Issue 2, October 2021
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.12034

Abstract

Condenser is one of the most important components in the power generation industry, which serves to condense the output steam from low-pressure turbine for boiler feed water. Several ways can be used to improve the performance of the condenser, one way is to add a serrated fin on the outer tube to lower the temperature of the outlet. A serrated fin that is used has 0° and 30 segments per period, which is installed on the tube with the diameter of the outer of 0.03175 m. This research was carried out by using the numerical method of CFD 2D to compare the performance of the heat transfer on the tube without and with a serrated fin on the variation speed of 7 m/s and 9 m/s. By inputting the parameters of the inlet of 350.15 °K, the resulting value of the outlet serrated fin tube temperature which is lower than the annular tube (tube without the serrated fin). On the simulation of the serrated fin tube with an inlet velocity of 7 m/s resulting outlet temperature of 343.2 °K, lower than in the simulation on the annular tube which produces the outlet temperature of 344.53 °K.
Magnetism of Stainless Steel 304 Due to Cold Rolling Naila Mubarok; Hamdan Akbar Notonegoro
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 7, Issue 2, October 2021
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.12567

Abstract

304 austenitic stainless steel (SS 304) is widely used in the oil and gas industry for its resistance to high pitting and stress corrosion. However, Its ability to withstand wear resistance due to fine sand particles carried by oil and gas is very limited.  Cold rolling is one of the methods used to mechanically increase the hardness of SS 304 steel. As a result of this method there is a deformation of the structure which causes a phase transformation from austenite to martensite. This change is accompanied by the formation of magnetic properties in the new phase.The increase in the percentage of deformation is followed by an increase in the magnetic saturation value and a change in the magnetic coercivity. Magnetic saturation is influenced by the large population of martensite phase formed, while the magnetic coercivity is influenced by grain shape of the martensite phase. This magnetic property will respond to an external magnetic field. So that the identification of the deformation can simply be known by observing the interaction of the SS 304 material with a magnetic object that is brought near.

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