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All Journal ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika JTERA (Jurnal Teknologi Rekayasa) JIRA: Jurnal Inovasi dan Riset Akademik REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat International Journal of Applied Technology Research JITEL (Jurnal Ilmiah Telekomunikasi, Elektronika, dan Listrik Tenaga) Industrial Research Workshop and National Seminar The International Journal of Education Management and Sociology Jurnal Inovasi Pengabdian dan Pemberdayaan Masyarakat SEMNASTERA (Seminar Nasional Teknologi dan Riset Terapan) Madani : Jurnal Pengabdian Kepada Masyarakat
Toto Tohir
Politeknik Negeri Bandung
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Journal : International Journal of Applied Technology Research

 1 
Experimnetal Investigation on Outdoor and Indoor PM2.5 and PM10 in Supermarkets in Bandung During Covid-19 Pandemic Kasni Sumeru; Toto Tohir; Neni Emrida Panjaitan; Mohamad Firdaus bin Sukri
Jurnal Internasional Penelitian Teknologi Terapan Vol 2 No 2 (2021): October 2021
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v2i2.52

Abstract

During the Covid-19 pandemic, the number of visitor at the trade center in Bandung was much reduced as compared to before pandemic, which was only about 30% of normal conditions. The present study is to investigate particulate concentrations of PM2.5 and PM10 in three supermarkets in Bandung, namely Kosambi, Batununggal Modern and Cinunuk supermarkets during the pandemic of Covid-19. Air sampling was measured using a particulate counter CEM DT96 for 11 hours, from 06:00 AM to 5:00 PM, local time. The results showed that the average of outdoor and indoor concentrations of PM10 in two supermarkets (Batununggal Modern and Griya Cinunuk) was lower than standard during that 11 hours. As for the outdoor concentrations of PM2.5, both markets exceeded the standard for several hours in the morning. In general, it can be concluded that the outdoor and indoor concentrations of PM2.5 and PM.10 during pandemic were below the standard, except in the morning before 10:00 AM
Battery-Supercapacitor Current Control Using Fuzzy Supervisory with PI Controller for Electric Vehicle Application Adnan Rafi Al Tahtawi; Muhammad Reihan Iskandar; Sofian Yahya; Toto Tohir; Dedi Aming
Jurnal Internasional Penelitian Teknologi Terapan Vol 3 No 2 (2022): October 2022
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v3i2.82

Abstract

The configuration of the battery-supercapacitor as a hybrid power source (HPS) is one solution to overcome the limitations of battery life, such as in an electric vehicle. To achieve battery energy savings when a supercapacitor is added, a control scheme is needed. This paper proposes a battery-supercapacitor current sharing control scheme using Fuzzy Supervisory Control (FSC). The FSC is designed to determine how much current of the battery and supercapacitor need to discharge based on the current requirement of the load. The output of the FSC will produce a reference current which is then controlled in the main closed-loop control using a Proportional-Integral (PI) controller. The control signal in the form of a duty cycle is then used to regulate the battery-supercapacitor current through a DC/DC converter. This control scheme is tested using a resistive load change scenario both simulation and experimental. The results show that the battery-supercapacitor current can be controlled according to the loading conditions.
Design of Hybrid Energy System for Railway Application (Case Study of People Mover System in Doha, Qatar) Nugroho, Sri; Mauludin, Luthfi Muhammad; Sirait, Togar; mujiman, mujiman; Sofyan, Ahmad; Tohir, Toto
Jurnal Internasional Penelitian Teknologi Terapan Vol 4 No 1 (2023): April 2023
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v4i1.112

Abstract

This paper presents the conceptual design of hybrid energy system used in railway application. The hybrid system with batteries and energy storage double-layer capacitor is a new technology that is used under extreme climatic conditions, especially in daytime temperature up to 50°C, high relative humidity, dust and heavy rain. It is a combination of double-layer capacitors and traction batteries. It draws power both externally and from braking energy. In order to reduce CO2 emissions to the environment, energy-saving drives and energy storage are used. Also, in public transportation, Sitras Hybrid Energy System (HES), hybrid energy storage system for trams, has been developed which combines a double-layer capacitor with a nickel-metal hydride battery. The storage not only allows driving without overhead lines, it also enables braking energy to be recovered. A reliable cooling system is required to ensure that the performance of the battery and the capacitor storage is maintained for as long as possible. The results of finite element model showed the robustness for railway application. The computational model refers to proof of static and dynamic strength in accordance with EN12663. A cooling system for a tram using this innovative technology was designed and qualified for the "Qatar Education City People Mover System (PMS)" project.
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.
Energy and Exergy Analysis of Chest Freezer Using R134a and R290 as Working Fluids Based on Experimental Data Pramudantoro, Triaji Pangripto; Muliawan, Rizki; Nuriyadi, Muhammad; Hidayat, Syarif; Tohir, Toto; Sulaimon, Shodiya
Jurnal Internasional Penelitian Teknologi Terapan Vol 5 No 2 (2024): June 2024
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v5i2.153

Abstract

Although R134a has a very high global warming (GWP) effect, it is still used as a refrigerant in chest freezers. As an alternative to R134a is R290 which has a very low GWP value, which is only 3. Therefore, it is expected that there will be no more chest freezers using R134a and replaced with R290, soon. Thermodynamic studies need to be conducted to see the advantages and disadvantages of the two refrigerants based on experimental data. In this study, a chest freezer which was originally manufactured for R134a with a charging mass of 150 g was used as a test object. Experimental data of the chest freezer using R290 was taken after testing with R134a was completed. Experimentally, the cabin temperatures of the chest freezer using R134a and R290 are -20.5oC and -35.7oC, respectively, and the input power are 264 W and 176 W, respectively. Total irreversibility on the four main components of the chest freezer using R134a is greater than using R290, namely 184.4 W and 107.0 W, respectively. This means that the use of R290 as a working fluid in the chest freezer is more efficient. There are at least three advantages of replacing R134a with R290, namely reducing greenhouse gas emissions because R290's GWP is much smaller than R134a, lower cabin temperature, and decreasing the input power of the chest freezer.
Co-Authors Abdullah Assegaf Adithia Maulady Adnan Rafi Al Tahtawi Aghnia Nur Zahrah Agriyani, Fioni Ahmad Sofyan Ahmad Yusuf Aisyah Indah Almira Ambar Susanto Anisa Dyah Lestari Annisa Nurul Sholihah Anwar, Hadrian Arifal Triprasetyo Adi Ashshidiqi, Hasbi Azzahra Salsabila Baisrum Baisrum, Baisrum Bambang Puguh Manunggal Bimo Fajrie Alwaaritsi Brian Fadilah Susanto Budi Setiadi Budi Setiadi, Budi Budi Triyono Dandy Nugraha Darwati, Endang Dedi Aming Destri Muliastri Diki Diki Dwi Septiyanto, Dwi Endang Habinuddin Fadilah, Rizal Fazrin, Rifki Rizkullah Febi Ariefka Septian Putra Fikri Sofhani Habinuddin, Endang Handayani Nur Jamilah Hasan Surya Icha Marsya Ramadhani Ichwan Latif Fajari Ilman, Sofyan M. Kartono W. Kasni Sumeru Kumar, Saurav Laras Nurul Syamsy Mauludin, Luthfi Muhammad Melisa Mulyadi Mohamad Firdaus bin Sukri Muhamad Alwi Muhamad Fahmy Muhammad Reihan Iskandar Mujiman Mujiman, Mujiman Muliawan, Rizki MULYONO, NANANG Neni Emrida Panjaitan Nisrina Nurul Fadlilah Nuriyadi, Muhammad Pramudantoro, Triaji Pangripto Putra, Pahreza Ridwan Putri, Amelia Ocktriviani Rena Reinita Ridwan Solihin Robert Adriaan Philipus Robert Adrian Sapto Prajogo Shodiya Sulaimon Sirait, Togar SISWOYO Sofian Yahya Sophia Latifah Aulia Sri Nugroho SRI UTAMI Sudrajat Sudrajat Sudrajat Sudrajat SUNARTO Sunarto Sunarto Sunarto Sunarto Supriyadi, Tata Supriyanto Supriyanto Suhono Supriyanto Supriyanto Syarif Hidayat Trisnawiyana Trisnawiyana Trisnawiyana, Trisnawiyana Wijayanti, Linda Yosep Santosa Yoseph Santosa Yudi Prana Hikmat