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All Journal Eksergi: Jurnal Teknik Energi
Efendi, Erwan Tri
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Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Energy Engineering Mechanical Engineering

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Prototype of Electrical Power Breaker Automation ON PHB-TR Using Microcontroller-Based IOT For Flood-Prone Areas Kusuma Wardhany, Arum; Setya, Hilman Luthfi; Kamil, Ikhsan; Efendi, Erwan Tri
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.v21i02.6497

Abstract

The flood disaster caused losses for PT PLN consumers whose areas were flooded. To prevent electric shock accidents due to flooding, PT PLN took steps to extinguish distribution substations whose areas were affected by flooding. This step was taken to maintain the safety of the flood-affected community from being electrocuted, but this resulted in a loss for PT PLN, namely the selling kWh that was not distributed. In this study, the method used is research and development, where the author makes an idea to overcome the problem of the length of power outage due to flooding by making a PHB-TR Control Prototype for Distribution Substations. Where this prototype is an innovation to replace the main switch on the PHB-TR with MCCB and MCB which are applied in the box panel. With this prototype, PT PLN officers can speed up the process of blackout areas experiencing flooding quickly by controlling the MCCB and MCB at the PHB-TR distribution substation from the PLN office, but still maintaining the reliability of the 20 kV Medium Voltage Network. This prototype is based on the Internet of Things that can be controlled remotely using the Blynk application that can be operated from smartphones and computers. This prototype design is expected to help PLN officers to cut off the PHB-TR load from the PLN office or remotely, as well as some of the benefits that PT PLN can receive from this tool innovation, namely saving kWh that is not channeled and a positive image for PT PLN will be maintained by maintain the reliability of the electrical distribution system.
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.
Evaluation of the Efficiency and Stability of High-Frequency Inverters Under Varying Load Profiles in Photovoltaic Systems Zahro, Nabila Aida Az; Samaratungga, Langga; Hendrawati, Dwiana; Ferandez, Aggie Brenda; Efendi, Erwan Tri
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.v21i03.7111

Abstract

This research undertakes an operational performance analysis of a high-frequency inverter (HFI) within a Solar Power Plant (SPP) system configuration. The investigation prioritizes assessing the effects of pure resistive and mixed resistive-inductive load profiles on its efficiency stability. Experimental findings definitively demonstrate that the HFI inherently maintains superior efficiency stability when operating under purely resistive loads. Conversely, the introduction of varying inductive loads tends to compromise this efficiency stability, inducing significant fluctuations. These results yield crucial recommendations, establishing that HFIs are optimally suited for systems with predominantly resistive loads, thereby contributing to the overall system power efficiency enhancement
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.
Simulation of Automatic Solar Tracker Control System Using Proteus Application Efendi, Erwan Tri; Wibowo, Bayu Setyo; Dhiyaussalam, Dhiyaussalam; Wardhany, Arum Kusuma; Wibisono , Arifin
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.v20i03.6360

Abstract

As a tropical country, Indonesia possesses significant renewable energy potential, particularly from solar and wind sources. However, seasonal variations—such as high solar intensity during the dry season and increased wind speeds during the rainy season—pose challenges to optimizing solar cell utilization. While solar energy presents an ideal solution for clean energy transition, static photovoltaic (PV) systems suffer from efficiency limitations due to their inability to track the sun’s movement. Dual-axis solar trackers can enhance energy efficiency by 25–35% compared to fixed systems, particularly in tropical regions with dynamic solar positioning. However, large-scale physical implementation requires substantial investment, making simulation tools like Proteus essential for computational validation prior to real-world deployment. Proteus facilitates comprehensive modeling of LDR sensors, servo motors, and microcontroller-based control algorithms (e.g., Arduino) in a precise virtual environment. This approach also evaluates the impact of tropical conditions (e.g., humidity, rainfall) on system reliability while optimizing designs to reduce costs. Integrating current research with Proteus simulations offers a robust methodology to accelerate solar tracker adoption in Indonesia.
Operational Assessment of Shell and Tube High Pressure Heater in PT Sumber Segara Primadaya's 300 MW Unit 2 Power Plant Mulyono, Mulyono; Efendi, Erwan Tri; Setiyawan, Rayhan Muhammad Faqi Fikar; Sandi, Dianisa Khoirum; Dhiyaussalam , Dhiyaussalam
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.v21i01.6361

Abstract

Electricity is a fundamental necessity, with Indonesia's per capita consumption reaching 1.73 kWh/capita in 2022—a 4% increase from 2021 and the highest in five decades. Projections indicate demand will surge to 1,885 TWh by 2060, with per capita consumption exceeding 5,000 kWh, underscoring the need for efficient power generation. In coal-fired power plants (PLTU), high-pressure shell-and-tube heat exchangers are critical for optimizing efficiency, recovering waste heat to preheat boiler feedwater, reducing fuel use by 5–10%, and minimizing emissions. This study evaluates the performance of these heat exchangers at PT Sumber Segara Primadaya PLTU Cilacap, a major Indonesian PLTU with units totaling 2,260 MW capacity. By analyzing operational effectiveness, this research aims to enhance maintenance strategies and maximize energy output, supporting Indonesia's growing electricity demands while improving thermal efficiency in coal-dependent power systems.
Co-Authors Arum Kusuma Wardhany Dhiyaussalam , Dhiyaussalam Dhiyaussalam, Dhiyaussalam Dwiana Hendrawati Evan, Bah Fajri, Amrisal Kamal Ferandez, Aggie Brenda Huda, Luqman Al Ikhsan Kamil Kusuma Wardhany, Arum Li, Yang Mulyono Mulyono Prihatmini, Eri Samaratungga, Langga Sandi, Dianisa Sandi, Dianisa Khoirum Setiyawan, Rayhan Muhammad Faqi Fikar Setya, Hilman Luthfi Wibisono , Arifin Wibowo, Bayu Setyo Zahro, Nabila Aida Az