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International Journal of Applied Technology Research
Published by Politeknik Negeri Bandung
ISSN : -     EISSN : 27217582     DOI : https://doi.org/10.35313/ijatr
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics
This journal is intended to foster and stimulate the exchange of discourses on applied technology research issues among professionals and academics throughout the world. IJATR welcomes articles in all areas of engineering and technology research, both applied and theoretical. In case of theoretical article, it must provide a clear link to some important and interesting engineering and technology applications.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 7 Documents
 1 
Search results for , issue "Vol 4 No 2 (2023): October 2023" : 7 Documents clear
Analysis of Selection of Alternative Materials Outer Support Solar Water Heater Destri Muliastri; Aldi Alfares; Emsa Ayudia Putri
Jurnal Internasional Penelitian Teknologi Terapan Vol 4 No 2 (2023): October 2023
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v5i1.98

Abstract

In producing a product, the Manufacturing Industry always prioritizes safety, quality, and profit. One product that prioritizes these criteria is Outer Support on Solar Water Heaters. Currently, the material used in the outer support of the solar water heater is SS 304, the SS 304 material is considered too expensive, so the profits obtained by the manufacturing industry are very small. In addition, SS304 material from year to year is getting harder and harder to find. In this study, an analysis of the selection of alternative outer support materials for solar water heaters was carried out in order to obtain materials that can fulfill the outer support function at a relatively cheap price, do not reduce the outer support function and are easy to obtain or many on the market. The method used in this study uses the Analytical Hierarchy Process (AHP) and CES edupack software as the process of selecting materials. In this study, several tests of mechanical properties were carried out, namely tensile tests, hardness tests, and corrosion resistance tests to determine the mechanical properties of the material, and simulations of selected materials were carried out using Solidworks software, with the aim of knowing the maximum stress value and safety factor. The results obtained from this study obtained an alternative material, namely AISI 201 for the outer support. The results of the hardness test obtained the best hardness value in AISI 201 of 177.17 VHN. The results of the tensile test obtained a yield strength value of 390.35 MPa on AISI 201 material
Agglomeration Decrement from Nanocellulose Synthesis by adding PVA Capping Agent Kusumawati, Endang; hidayatulloh, irwan; Elizabeth, Lidya
Jurnal Internasional Penelitian Teknologi Terapan Vol 4 No 2 (2023): October 2023
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v4i2.111

Abstract

Indonesia is one of the largest palm oil productions in the world. In 2017, Indonesia was responsible for almost 50% of global palm oil production. The abundant availability of Oil Palm Empty Fruit Bunches (OPEFB) has become a potential resource to be further utilized in derivative products such as cellulose, hemicellulose and lignin. The demand for nanocellulose material from extracted cellulose fibers is increasing. In this study, nanocellulose synthesis was carried out in several stages namely hydrolysis (H2SO4 64% (v/v) at 45oC for 45 minutes), delignification (NaOH 17,5% (w/v) at 80oC for 30 minutes), and bleaching (H2O2 10% (v/v) at 60oC for 15 minutes). Then, nanocellulose was subjected to ultrasonication. It was proved that nanocellulose with 50.487 nm diameters resulted from ultrasonication 50% amplitude. Moreover, adding 5%-w PVA (polyvinyl alcohol) as capping agent obtained 36.635 nm average diameter of nanocellulose. It showed nanocellulose synthesis successfully lowering agglomeration and maintaining diameter size of nano size.
Efforts of Community Adaptation to Deal with Rob Floods on The Meulaboh Coastline Febrianti, Dian; Zakia, Zakia; Safriani, Meylis; Ikhwali, M. Faisi; Husaini, Muhammad Zakki; Prayogo, Wisnu; Ersa, Nanda Savira; Farizal, Teuku
Jurnal Internasional Penelitian Teknologi Terapan Vol 4 No 2 (2023): October 2023
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v4i2.121

Abstract

Most of Indonesia's territory is geographically located in the coastal area. One of the areas located in the coastal area is the city of Meulaboh, West Aceh Regency. The coastal area of Meulaboh often experiences tidal flooding, especially the coastal area of Gampong Pasir and has a quite severe impact compared to other areas on the coast of Meulaboh. Based on this background, this study aims to identify community adaptation to the tidal flood event based on community responses in the coastal area and identify efforts to mitigate the impact of tidal floods that have been carried out by the community and the government. The analytical methods used are descriptive quantitative and qualitative analysis methods, as well as cross-tabulation analysis related to community adaptation variables, which include community characteristics, the impact of tidal floods on the residential environment, identification of tidal flood conditions and efforts to mitigate the impact of tidal floods, carried out by the community and the government. The results showed that the people of the coastal area of Meulaboh were able to make efforts to deal with tidal floods in the form of repairing road networks, residential houses, drainage channels, places of worship (mosques), village offices, and clean water and sanitation systems. The government's efforts to deal with tidal floods are carried out by making barriers to protect the coast through tetrapod. These results are important to take future action to deal with tidal floods.
Design Of Generator Test Equipment With Microcontroller-Based Dummy Load Heating Element With Fuzzy Logic Method Tohir, Toto; Baisrum, Baisrum; Putra, Pahreza Ridwan; ilman, sofyan muhammad; Putra, Febi Ariefka Septian; Habinuddin, Endang
Jurnal Internasional Penelitian Teknologi Terapan Vol 4 No 2 (2023): October 2023
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v4i2.123

Abstract

New power plants are urgently needed to support the needs of the community and industry in accordance with government regulations on the need for renewable energy sources. However, in its implementation, the construction of this new power plant is hampered by the absence of facilities and infrastructure, especially the technology that supports it, one of which is pre-operation activities. At this stage, it is necessary to test the generators that will be used in the plants. Generators are an important component in the electricity system. Meanwhile, research on generator testing is still rare, as are the tools that support the process of generator testing. This study aims to design a generator test tool so that this test can take place more effectively and efficiently. In general, the testing method uses a dummy load so that the load on the generator can be manipulated. With fuzzy logic control on dummy load control, the testing process can be done more optimally and can be monitored on a larger system. The results of this study showed current measurement with a maximum error of 1.64%, voltage measurement with a maximum error of 0.5%, frequency measurement with a maximum error of 0.4%, and a maximum control error of 5.7%. The automation system applied is still limited to monitoring electrical parameters.
Experimental Investigation on PM10 and PM2.5 Concentrations in North Bandung Wellid, Ismail; Nurfitriani, Nita; Falahuddin, Muhamad Anda; Simbolon, Luga Martin; Sunardi, Cecep; Nuryati, Neneng; bin Sukri, Mohamad Firdaus
Jurnal Internasional Penelitian Teknologi Terapan Vol 4 No 2 (2023): October 2023
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v4i2.124

Abstract

North Bandung is an area where there are several tourist attractions, including the Dago Dream Park. The main road to several locations in North Bandung is via the road in front of Terminal Dago. For this reason, the purpose of this study was to collect data on PM2.5 and PM10 concentrations at both locations, namely in front of Terminal Dago and Dago Dream Park. Data collection was carried out for seven days, from Monday to Sunday, from 08.00 to 16.00 local time. To evaluate air quality in these two places, the national standard, namely PPRI No. 22 of 2021 and international standards from WHO were applied. The measurement results show that the concentrations of PM2.5 and PM10 in these two locations are still within the national standard. Meanwhile, when evaluated with WHO standards, PM10 concentrations in both locations are still within standard, but for PM2.5, there are several days where the air quality is out of the standard. The average concentrations of PM2.5 and PM10 during the 7 days of measurement at Terminal Dago are 19.9 μg/m3 and 21.6 μg/m3, respectively. While the average concentration of PM2.5 and PM10 during 1 week of data collection were 18.9 μg/m3 and 19.9 μg/m3, respectively. This means that the concentration of PM2.5 and PM10 at Terminal Dago is slightly higher than that of at Dago Dream Park. In addition, based on an evaluation using national standards, Dago Dream Park tourist attractions still have good air quality and are safe for local residents and tourists. From the data recorded at the Health Centre (Puskesmas), the number of ARI cases in the two locations in 2020 and 2021 is relatively not much different.
Numerical Study of Thermal Comfort Evaluation in Naturally Ventilated Classrooms Prasetyo, Bowo Yuli; Muliawan, Rizki; Afifah, Andini Luthfiyyah; Wang, Fujen
Jurnal Internasional Penelitian Teknologi Terapan Vol 4 No 2 (2023): October 2023
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v4i2.131

Abstract

The classroom is one of the important facilities in teaching and learning activities. Just like any other room, ensuring thermal comfort becomes a vital aspect for its occupants. This study aims to evaluate environmental conditions and the thermal comfort experienced by classroom occupants through numerical methods. The evaluation involves the integration of the Predicted Mean Vote (PMV) and Predicted Percentage of Dissatisfied (PPD) equations into Computational Fluid Dynamics (CFD) simulations using a user-defined function. Furthermore, extensive field measurements and questionnaire surveys are also employed to support the simulation process. The results indicate that the air temperature tends to be high, reaching 30.91°C. Meanwhile, the air velocity within the room, particularly in the occupied areas, is significantly low, with an average value of 0.04 m/s. According to the ASHRAE Standard 55, the classroom is perceived as uncomfortable, as evidenced by a PMV value of 1.38 and a PPD of 44.94%. Therefore, efforts are required to enhance the thermal comfort in the space.
Numerical Study of Aerodynamic Characteristics of Airflow Around NACA 0012 and NACA 4412 Airfoils at Re = 170000 Soetanto, Maria Fransisca; Sugianto, Sugianto; Hartono, Budi; Z, M Rizki
Jurnal Internasional Penelitian Teknologi Terapan Vol 4 No 2 (2023): October 2023
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v4i2.134

Abstract

In this paper, a numerical study of the aerodynamic characteristics using the CFD method of the two-dimensional flow around NACA 0012 and NACA 4412 airfoils at -10 degrees to 25 degrees of angle of attack operating at Re 170000 is presented. The formation of flow patterns, pressure distribution, pressure coefficient (Cp), lift coefficient (Cl), drag coefficient (Cd), moment coefficient (Cm), and skin friction coefficient distribution along the chord The Y+ wall value curve is a validation that the mesh formation is in accordance with the requirements, i.e., a Y+ wall value below 10 for viscous dominant flows and for Spalart-Allmaras turbulent model viscous. The geometry of NACA 0012 and NACA 4412 airfoils is created using SolidWork, and CFD analysis is carried out using Ansys Workbench 2018. The results show that the stall condition at NACA 0012 is at 15 degrees of angle of attack, while at NACA 4412 it is at 16 degrees. Under stall conditions, Cl of NACA4412 is approximately 13 percent higher than NACA 0012, while the value of Cd shows almost the same value for both NACA 0012 and NACA 4412.

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