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All Journal Eksergi: Jurnal Teknik Energi BULLET : Jurnal Multidisiplin Ilmu AMMA : Jurnal Pengabdian Masyarakat
Evan, Bah
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Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing

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Analisis Kerusakan Retract Actuator Nose Landing Gear Pada Pesawat Boeing 737-800 Next Generation Pambekti, Arif; Misi Okia, Yudha; Kurniawan, Riski; Al Huda, Luqman; Evan, Bah; Kamal Fajri, Amrisal; Tri Efendi, Erwan
BULLET : Jurnal Multidisiplin Ilmu Vol. 3 No. 6 (2024): BULLET : Jurnal Multidisiplin Ilmu
Publisher : CV. Multi Kreasi Media

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Abstract

The retract actuator is one of the main parts of the landing gear, which functions to retract or extend. The retract actuator must be free in its operation and its movement must also be smooth. If the aircraft experiences a failure of the retract actuator function, namely the retract actuator in a slow to retract condition. Where there is a slowdown during retract and extend. Careful handling is required and in accordance with applicable aircraft maintenance procedures, especially regarding slow to retract conditions. This study uses a direct observation method for the analysis of the troubleshooting process on the B737-800 NG in the Merpati Maintenance Facility hangar. In addition, this study also uses the Fault Tree Analysis method to obtain the cause of the failure of the standby reservoir. After analyzing the results, the possible causes of failure in the Retract Actuator are by using the Fault Tree Analysis (FTA) method, the minimum cut set results are obtained with calculations consisting of 18 basic events.
Pelatihan Sistem Air Conditioning Pesawat Boeing 737-200 Bagi Siswa Jogja Flight Pambekti, Arif; Al Huda, Luqman; Evan, Bah; Kamal Fajri, Amrisal; Tri Efendi, Erwan
AMMA : Jurnal Pengabdian Masyarakat Vol. 3 No. 12 : Januari (2025): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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Abstract

Partners in this community service activity are Jogja Flight students. The goals and targets to be achieved in community service for Jogja Flight students are to increase students' knowledge about one of the aircraft systems, namely air conditioning. With this activity, it is hoped that it can increase students' provisions in job competition in the aviation world. To achieve the goals and targets of this community service program, partners are given training on air conditioning systems in the form of writing, pictures or videos during this activity. After this activity, Jogja Flight students have an additional ability of 90% which was initially only 17% about the Boeing 737-200 aircraft air conditioning system which is useful as added value when working later.
Development of a MATLAB GUI Application for Computing Reliability Indices at an Electrical Substation Fajri, Amrisal Kamal; Efendi, Erwan Tri; Evan, Bah; Prihatmini, Eri
Eksergi Vol. 21 No. 02 (2025): MAY 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v21i02.6844

Abstract

The reliability of power distribution systems plays a crucial role in ensuring the continuous and efficient supply of electricity to consumers. This study presents the development of a MATLAB-based Graphical User Interface (GUI) application designed to compute key reliability indices, including SAIFI (System Average Interruption Frequency Index), SAIDI (System Average Interruption Duration Index), and CAIDI (Customer Average Interruption Duration Index), specifically for electrical substations. The application was developed using MATLAB's App Designer and structured to provide an intuitive and interactive user experience. Real operational data from a 150 kV substation were utilized to test and validate the application’s functionality. The results demonstrate that the tool effectively simplifies the reliability analysis process, reduces calculation time, and minimizes the potential for manual errors. This application can serve as a practical support system for engineers and researchers in evaluating and improving the performance of electrical distribution systems.
Study of Hybrid Wind and Solar Energy Power Plants: An Analysis of the Battery Charging and Discharging System Sumarno, F Gatot; Evan, Bah; Aspriyanti, Vita Ayu; Alwi, Muhammad
Eksergi Vol. 21 No. 03 (2025): SEPTEMBER 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v21i03.7098

Abstract

Alternative energy can address the issue of PLN electricity supply, which is not available in all regions of Indonesia. The hybrid system of solar cells and wind turbines is a clean and environmentally friendly energy source because it does not produce carbon dioxide (CO₂) or other gases that play a role in global warming. The purpose of this final project is to analyze the length of time needed by a hybrid generator to charge and discharge the battery using load variations. This test was conducted in the Energy Conversion Laboratory using a unit of hybrid system equipment produced by KTENG (Korea Technology). The method employed involves charging the battery with energy generated from the hybrid system and discharging it using variations in lamp load. The results of this study indicate that the time needed to charge the battery is 21.28 hours in slightly cloudy weather with a total current of 4.7 amperes, and the battery discharge reaches 200 hours using a 10-watt load. Hybrid Generator, Battery Charging, and Discharging
Case Study on Energy Strategy Concerning Santa Ana Wind Activity Triggering Fires in Southern California Evan, Bah; Al Huda, Luqman; Dianisa Khoirum Sandi; Yusuf Dewantoro Herlambang; Eri Prihatmini; Vita Ayu Aspriyanti
Eksergi Vol. 20 No. 03 (2024): SEPTEMBER 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v20i03.6348

Abstract

Santa Ana winds, which are characterized by their scorching, arid, and forceful surges, significantly exacerbate wildfire hazards in Southern California, extending to 23,000 ha, particularly in the Los Angeles region. The purpose of this study is to examine the correlation between anthropogenic influences and natural climatic phenomena, with a specific focus on the influence of regional energy policies on the frequency and intensity of wildfires. The interaction between the Santa Ana winds and landscapes that are becoming more flammable has become more intensive in recent decades, although they are a natural phenomenon. Inadequately regulated urban expansion, prolonged droughts, and elevated temperatures are the causes of this intensification. Utility companies explicitly link wildfire ignitions during wind events to their energy infrastructure, particularly above-ground power lines. Moreover, the crisis has been further exacerbated by inadequate utility modernization, delayed policy reforms, and limited investment in fire-resilient infrastructure. This study assesses the degree to which regulatory inertia and climate change interact to elevate the likelihood of wildfires by analyzing historical wildfire data, meteorological patterns, and the evolution of California's energy policies. In the face of escalating climatic extremes, the results underscore the urgent need for energy strategies that are forward-thinking and integrated and that prioritize environmental sustainability, conflagration prevention, and resilience.
Polymer Microfluidics Chip Fabrication and Its Energy Application: A Mini Review Sandi, Dianisa; Li, Yang; Evan, Bah; Efendi, Erwan Tri; Huda, Luqman Al; Fajri, Amrisal Kamal; Prihatmini, Eri
Eksergi Vol. 21 No. 01 (2025): JANUARY 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v21i01.6352

Abstract

Microfluidics is a technology that manipulates fluids at a microscale and has shown great potential in various fields, including energy. This mini-review discusses common microfluidic materials and the main techniques in microfluidic chip fabrication, such as photolithography, soft lithography, and 3D printing-based fabrication methods. Furthermore, several applications of microfluidic chips in the energy sector, such as solar energy and fuel cell systems development, are also discussed. The use of microfluidic chips in energy systems offers high efficiency, low material consumption, and good system integration. This review aims to provide an overview of the progress of microfluidic chip fabrication and its energy potential applications.
The Effectiveness of Mechanical Power on An Auxiliary Rotor in The Design of Counter Rotating Wind Turbine (CRWT) Huda, Luqman Al; Evan, Bah; Prasetya, Ari; Sandi, Dianisa Khoirum; Prihatmini, Eri; Fajri, Amrisal Kamal
Eksergi Vol. 21 No. 01 (2025): JANUARY 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v21i01.6359

Abstract

The counter-rotating wind turbine (CRWT) represents a novel development in horizontal-axis wind turbine technology. This innovative design incorporates an additional rotor that rotates in unison with the main rotor along the same axis. Without the supplementary rotor, the turbine's configuration is analogous to that of a horizontal-axis wind turbine (HAWT) with the main rotor functioning independently. The primary objective of this study is to undertake a comparative analysis of the effectiveness of mechanical energy generation, as measured by torque, between the CRWT and HAWT designs. The configuration of the wind turbine is situated within a wind tunnel, characterized by a rectangular cross-section. The testing of wind turbines has been conducted at wind velocity of 2 m/s, 3 m/s, and 4.5 m/s. The total mechanical power measured was 0.14 W, 0.21 W, and 0.28 W at wind velocity of 2 m/s, 3 m/s, and 4.5 m/s, respectively. The final results of the study have analyzed the effectiveness of power enhancement through power coefficients.
Co-Authors Al Huda, Luqman Ari Prasetya, Ari Arif Pambekti Aspriyanti, Vita Ayu Dianisa Khoirum Sandi Efendi, Erwan Tri Eri Prihatmini F Gatot Sumarno, F Gatot Fajri, Amrisal Kamal Huda, Luqman Al Kamal Fajri, Amrisal Li, Yang Misi Okia, Yudha Muhammad Alwi Prihatmini, Eri Riski Kurniawan Sandi, Dianisa Sandi, Dianisa Khoirum Tri Efendi, Erwan Vita Ayu Aspriyanti Yusuf Dewantoro Herlambang