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All Journal ASEAN Journal of Systems Engineering ELKHA : Jurnal Teknik Elektro Teknofisika Jurnal Otomasi Kontrol dan Instrumentasi Journal of Environmental Science and Sustainable Development Journal of Social Research Eduvest - Journal of Universal Studies Applied Engineering and Technology Jurnal Pengabdian, Riset, Kreativitas, Inovasi, dan Teknologi Tepat Guna (Parikesit)
Rachmawan Budiarto
Universitas Gadjah Mada
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Neuroscience Physics Public Health Social Sciences

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Pengenalan Emosi Dasar dan Anti-Bullying sebagai Upaya Peningkatan Kesadaran Berempati dalam Masyarakat Rachmawan Budiarto; Ridha Hanifah; Novi Astuti Indra Paranita; Rias Janathun Qolbi; Lintang Ratri Handaru Putri; Adrian Yoga Permana; Alvina Mita Iknawati; Alya Akmala Luthfiani Farras; Cahyo Indarti; Joko Sudibyo; Sujono
Jurnal Pengabdian, Riset, Kreativitas, Inovasi, dan Teknologi Tepat Guna Vol 1 No 2 (2023): November
Publisher : Direktorat Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/parikesit.v1i2.9718

Abstract

Bullying in the school environment is an emerging issue that needs to be taken care of by various parties. It will cause a negative impact on the future of both the perpetrator and the victim. Children may grow up with unstable emotions and have low empathy for others. The purpose of this activity is to introduce basic emotions and anti-bullying knowledge as an effort to increase empathetic awareness in the community in preventing bullying. Prospective comparative study with an observation and interview was carried out as the methodology, teachers, and parents. The research sample was selected using a purposive sampling method. Based on observations, it was found that there are behaviors that indicate bullying in the school environment. In addition, students were also found to have poor empathy and emotional management. The activity of introducing basic emotions and anti-bullying behavior utilized posters, mini games, and attaching stickers. This activity is targeted for grade 5 elementary school students because they are already able to recognize their emotions, and their experience will be an example for other students in another grade. Students, teachers, and parents who have been interviewed stated that this emotional recognition and anti-bullying activity was excellent and had a positive impact on children's emotional development. Students increasingly understand the meaning of basic emotions and anti-bullying, recognize self-emotions, know how to express emotions, increase empathy, and create a more comfortable school environment.
SUSTAINABILITY ANALYSIS OF MICROHYDRO POWER PLANTS IN JAYAPURA REGENCY, PAPUA Adhitia, Pius; Sulaiman, Muhammad; Budiarto, Rachmawan
ASEAN Journal of Systems Engineering Vol 6, No 2 (2022): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajse.v6i2.76534

Abstract

The need for energy and electricity in a number of regions currently tends to increase every year. The fast pace of modernization and increasing economic activity in various parts of Indonesia are the main factors triggering the increase in energy demand. The data analysis technique in this study was using quantitative correlation methods with questionnaires and data from field observations. Data in the form of questionnaires and data from observations are primary data in this study. The purpose of this survey is to measure the performance of Micro hydro Power Plants (MHPP) at each site using KPIs related to the sustainability of the site. In addition to verifying objects that are connected and not connected to the MHPP, this survey also covers topics related to the sustainability of the MHPP site which includes operational status, finances, checking of physical components and the results obtained. Based on a survey conducted on the five MHPP sites, there are 325 houses stairs, 24 social institutions, and 28 PUE, Non-functioning buildings are the main reason, Damage to components and the presence of new generators are the main reasons behind MHPP not operating, There is a correlation between MHPP performance and customer satisfaction, Tariff system applied by all MHPP sites is a fixed rate with a cost of Rp. 20,000.00 to Rp. 30,000.00, All MHPP sites, Damage to generator and ELC components, Deforestation occurs in all MHPP sites, and Based on physical checks on MHPP.
Reliability Analysis and Maintainability for the Design of Grid and Hybrid Solar Power Plant Systems in Wonogiri Regency Nur’Aini, Etika; Budiarto, Rachmawan; Setiawan, Bakti; Ma'arif, Alfian
ELKHA : Jurnal Teknik Elektro Vol. 13 No. 1 April 2021
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/elkha.v13i1.46011

Abstract

Indonesia has the potential for large solar power plants. It has relatively constant solar radiation because it is close to the equator. Besides, solar energy includes renewable energy that is more environmentally friendly and easier to apply in office areas, especially Wonogiri. However, it turns out that the solar power plant projects that have been built are not yet fully functional, and some have even failed. A lack of responsibility and maintenance causes this carried out after the project is complete. For this reason, it is necessary to estimate the reliability of these components and determine the maintenance schedule before the project is carried out. So that later they have a picture and be better prepared when this project is already underway. The fault tree method's failure factors are expected to create a picture to maintain reliability and determine the prioritized components for maintainability. For the results obtained to be more appropriate, apart from seeing the quantitative analysis output, the fault tree also needs to be adjusted to the component manual or datasheet to determine the replacement of spare parts and their maintenance. So that the resulting schedule for maintenance and replacement of spare parts. Thus, the solar power plant project that has been built will be more reliable and can be appropriately utilized.
Analisis Energi dan Emisi CO2 Rencana Bus Listrik di Yogyakarta Studi Kasus Trans Jogja Rismana, Angata; Budiarto, Rachmawan; Widi Harto, Andang
Jurnal Otomasi Kontrol dan Instrumentasi Vol 11 No 1 (2019): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2019.11.1.1

Abstract

Sektor transportasi memiliki proporsi konsumsi energi terbesar kedua di Indonesia setelah sektor rumah tangga. Berdasarkan Indonesia Energy Outlook 2017, konsumsi energi sektor transportasi mencapai 31% dari total kebutuhan dan meningkat 5,2% per tahunnya dalam kurun waktu 2010-2015. Yogyakarta sebagai kota pelajar dan tujuan wisata mendorong perbaikan sistem transportasi umum untuk menekan jumlah penggunaan kendaraan pribadi. Kendaraan listrik merupakan salah satu cara mengatasi ketergantungan bahan bakar berbasis minyak bumi sekaligus dapat menjadi solusi transportasi umum ramah lingkungan dan rendah emisi. Analisis konsumsi energi pada bus listrik dilakukan dengan menggunakan bus Trans Jogja jalur 3B untuk mendapatkan parameter berkendara yang sesuai, dari hasil analisis tersebut dapat ditentukan bus yang memerlukan konsumsi energi dan emisi CO2 paling sedikit. Melalui hasil penelitian diperoleh siklus berkendara Trans Jogja jalur 3B memiliki jarak 36.818 m, waktu tempuh 5.391 s, dan rerata kecepatan 24,5 km/jam. Berdasarkan pemodelan perhitungan energi tiap lampu lalu lintas, diperoleh konsumsi energi bus listrik sebesar 1,35 kWh/km sedangkan bus konvensional membutuhkan 2,74 kWh/km. Emisi yang dihasilkan dalam satu siklus berkendara bus listrik berdasarkan pemodelan pasokan energi tahun 2025 dan 2050 adalah sebesar 22,13 kgCO2 dan 19,78 kgCO2 sedangkan pada bus konvensional sebesar 26,94 kgCO2.
ASSESSING POTENTIAL ENERGY SUSTAINABILITY OF MICRO-HYDROPOWER SYSTEM THROUGH A SUSTAINABLE INDICATOR APPROACH Safitri, Icmi Alif; Sulaiman, Muhammad; Budiarto, Rachmawan
Journal of Environmental Science and Sustainable Development Vol. 7, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The development of micro-scale renewable energy power generation systems, such as micro-hydropower (MHP), often needs more consideration for sustainability during the planning stages. Many small-scale renewable energy systems have shorter-than-expected lifespans, jeopardizing Indonesia's Net Zero Emission Target for 2060 or earlier. Despite this, only some studies have examined the long-term viability of installed renewable energy generation projects, particularly MHP plants not managed by state-owned companies or PLN (Pembangkit Listrik Negara). The primary objectives of this research are to evaluate the feasibility of retrofitting and assess the potential sustainability of a decommissioned MHP in Banjarnegara, Central Java. A cash flow analysis was performed to assess techno-economic indicators. Additionally, the social-institutional dimension was analyzed through in-depth interviews with 15 stakeholders. Sustainability was evaluated using a framework of 15 indicators across technical, economic, environmental, social, and institutional dimensions. The findings revealed that among the four sustainability aspects, the social-institutional dimension scored the lowest potential sustainability at 26.67%. In contrast, the technical and environmental dimensions showed higher potential sustainability, scoring 83.7% and 87.5%, respectively. The economic dimension was deemed feasible only when the financing model accounted solely for retrofitting costs. It is crucial to consider all dimensions comprehensively. Furthermore, engaging multiple stakeholders and fostering local community awareness is vital to ensure the long-term sustainability of decentralized energy systems. This study enhances the understanding of the sustainability potential of abandoned decentralized energy systems and explores how reusing abandoned MHP facilities can support stakeholders in revitalization efforts, contributing to an increased share of renewable energy in the overall energy mix.
The Optimization of Efficiency in Grid-Connected PV Systems in Tropical Climates Using a Single-Axis Solar Tracker Based on Simulation Hendra Budiono Putra Parapa; Rachmawan Budiarto; Mohammad Kholid Ridwan
Journal of Social Research Vol. 5 No. 4 (2026): Journal of Social Research
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/josr.v5i4.3106

Abstract

The high potential for solar radiation in the tropics demands a Solar Power Plant (PLTS) system that can adapt to the sun's dynamic annual movements. Conventional fixed-tilt systems tend to be suboptimal at low latitudes due to the limited variation in solar radiation angle throughout the year. This study aims to evaluate and optimize the performance of on-grid solar power plants using a horizontal east-west single-axis solar tracker (SAT), as well as to analyze the effect of increased thermal losses on system efficiency in tropical climatic conditions. The case study was conducted on an on-grid solar power plant with a capacity of 50.4 kWp located in Mawang, Makassar (5.22° S), with a fixed-tilt system at a tilt angle of 17° as a comparison. The research methodology used a PVsyst software-based simulation approach with the activation of a backtracking scheme to mitigate inter-row shading at a ground coverage ratio of approximately 55.8%. The simulation results showed that the application of single-axis trackers increased the annual energy channeled to the grid (E<sub>Grid</sub>) by 4.81%, equivalent to 3,149 kWh. However, the increase in the Performance Ratio (PR) was relatively limited, from 0.794 to 0.798, due to the increase in module thermal losses reaching 13.3%. These findings make a quantitative contribution regarding the trade-off between increased irradiation capture and thermal penalty in the application of single-axis trackers in the tropics, and confirm that the optimization of tracking systems depends not only on optical aspects but also on the thermal management of photovoltaic modules.
Energy Recovery from Cooling Tower Blowdown Water for Micro-Hydropower Generation: A Case Study at Asam Asam Coal-Fired Power Plant Handa Ramadhan; Rachmawan Budiarto; Kusnanto Kusnanto
Journal of Social Research Vol. 5 No. 7 (2026): Journal of Social Research
Publisher : International Journal Labs (AHU-0028405-AH.01.14 Tahun 2022)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/josr.v5i7.3218

Abstract

The global electricity sector faces increasing pressure to maintain reliable supply while reducing greenhouse gas emissions. In coal-fired power plants, cooling tower blowdown water is typically discharged as wastewater, despite containing hydraulic energy potential. This study aims to evaluate the technical, environmental, and financial feasibility of utilizing cooling tower blowdown water for low-head micro-hydropower generation at the Asam Asam Coal-Fired Power Plant in South Kalimantan, Indonesia. The research methodology combines field measurements of flow and head, hydraulic and turbine design, annual energy modeling, carbon emission reduction estimation, and financial analysis including NPV, IRR, Payback Period, and LCOE. Results indicate that the selected cooling towers, with a Q?? discharge of 0.15 m³/s and gross head of 4 m, can generate 25,379–25,996 kWh/year, supplying approximately 85.42% of the mosque's annual energy demand. The system can reduce CO? emissions by 31.80–32.57 tons per year and demonstrates financial feasibility with an NPV of IDR 43,043,390.85 and a payback period of just over seven years. In conclusion, cooling tower blowdown water represents a viable energy recovery source, contributing to operational sustainability and emission reduction. The study recommends future exploration of hybrid energy systems and optimization for larger-scale industrial applications.
Optimization of PV-BESS System Capacity Considering Battery Degradation for Nighttime Peak Load Supply: A Case Study of Guluk-Guluk, Madura Herdian Raditya; Rachmawan Budiarto; Roni Irnawan
Eduvest - Journal of Universal Studies Vol. 6 No. 7 (2026): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v6i7.53297

Abstract

The integration of photovoltaic (PV) generation into power systems presents operational challenges due to the temporal mismatch between daytime solar production and nighttime peak demand. This issue is particularly critical in tropical systems with limited local generation flexibility, such as Guluk-Guluk, Madura, where a PV–battery energy storage system (PV-BESS) is planned to support nighttime peak load demand. This study aimed to determine the optimal PV-BESS capacity configuration under a PV-only charging scheme, in which the battery is charged solely by PV generation without grid support. A 25-year time-series simulation based on historical solar resource data was integrated with Particle Swarm Optimization (PSO) to minimize the Net Present Cost (NPC) while penalizing unmet energy demand. Battery degradation was modeled using calendar and cycle aging, and the impact of Power Conversion System (PCS) charging capacity was evaluated through sensitivity analysis and re-optimization. The baseline optimal configuration consisted of 75.36 MWp of PV capacity and 570.98 MWh of initial BESS capacity with a 50 MW PCS, achieving 83.85% reliability and an NPC of USD 269.18 million. The results indicated that battery aging was not the dominant factor limiting system reliability; instead, daily solar variability and PCS charging constraints had stronger impacts. Increasing PCS capacity from 50 MW to approximately 56 MW significantly improved reliability, while further increases yielded diminishing returns as the system transitioned from power-limited to energy-limited operation. These findings emphasize the importance of integrated PV, BESS, and PCS planning for renewable peaker applications in tropical power systems.
Co-Authors Adhitia, Pius Adrian Yoga Permana Ahmad Saiful Fathi Alfian Ma’arif Alvina Mita Iknawati Alya Akmala Luthfiani Farras Arief Budiman Bakti Setiawan Cahyo Indarti Deendarlianto Efendi S Wirateruna Endang Sulastri Faruq Nashrulloh Fitrotun Aliyah Fitrotun Aliyah Handa Ramadhan Hendra Budiono Putra Parapa Herdian Raditya Joko Sudibyo Kurniawan, Aries Taufiq Kusnanto Kusnanto Lintang Ratri Handaru Putri Memory Motivanisman Waruwu Memory Motivanisman Waruwu Mohammad Kholid Ridwan Muhammad Sulaiman Muhammad Sulaiman Novi Astuti Indra Paranita Nur’Aini, Etika Prasetyo, Ridwan Budi Rias Janathun Qolbi Ridha Hanifah Rismana, Angata Roni Irnawan Safitri, Icmi Alif Salsabila Khulukin Hasanah Septiana Ria Prihandita Singgih Hawibowo Sujono Sunarno Sunarno Sunarno Sunarno Tri Rahayu Kusumaningsih Utami, Sentagi Sesotya Widi Harto, Andang