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In-depth evaluation and enhancement of a PV-wind combined system: A case study at the Engineering Faculty of Wahid Hasyim University Mauludin, Moch Subchan; Khairudin, Moh.; Asnawi, Rustam; Trisnoaji, Yuki; Prasetyo, Singgih Dwi; Azizah, Safira Rusyda; Wiraguna, Rayie Tariaranie
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 16, No 2: June 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v16.i2.pp1274-1283

Abstract

Energy sustainability is crucial for mitigating climate change and reducing dependence on fossil fuels. This research evaluates a hybrid renewable energy system combining photovoltaic (PV) technology and wind turbines to meet the electricity demand of Wahid Hasyim University's Faculty of Engineering, totalling 555,000 VA. Using HOMER Pro software, the study identifies the optimal configuration based on technical, economic, and environmental aspects. The hybrid system integrating PV, wind turbines, batteries, and converters achieves the lowest Net Present Cost (NPC) of $214,877 and a Levelized Cost of Energy (LCOE) of $0.0185/kWh, outperforming grid-only systems. Environmentally, the system significantly reduces carbon dioxide (CO2) emissions, from 559,226 kg/yr in conventional systems to 62,452 kg/yr. Solar energy contributes 56% of electricity generation, leveraging stable solar radiation of 4.28–5.54 kWh/m²/day. Additionally, an annual surplus of 156,350 kWh can be sold back to the grid, enhancing operational efficiency. This study demonstrates that hybrid renewable energy systems deliver long-term cost efficiency and significantly mitigate climate impacts. It provides a sustainable energy model for campuses in Indonesia and worldwide, particularly in regions with abundant solar resources.
Fabrication and Structural Integrity Analysis of a Jenang Mixer Machine: A Solution for Modernizing Traditional Indonesian Food Production Prasetyo, Singgih; Kusumawardana, Arya; Fathur Rizal, Royb; Munir, Misbahul; Sukarman, Sukarman; Karhoma Wijaya, Ababil; Trisnoaji, Yuki
Jurnal Teknik Mesin Mechanical Xplore Vol. 6 No. 1 (2025): Jurnal Teknik Mesin Mechanical Xplore (JTMMX)
Publisher : Mechanical Engineering Department Universitas Buana Perjuangan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36805/jtmmx.v6i1.10414

Abstract

The design and fabrication of the Jenang mixer machine are carried out to enhance the efficiency of household industrial-scale Jenang production. The machine is designed using an engineering approach based on numerical analysis and the Design for Manufacture and Assembly (DFMA) method. The drive power calculation shows a minimum requirement of 2072.7 Watts; therefore, a 3 HP electric motor equipped with a gearbox is used to produce significant torque at low revs. Analysis of the frame strength using static simulations in Fusion 360 software revealed that the machine structure had a safety factor of 15 and a maximum displacement of only 0.006 mm, indicating a robust and stable structure. The fabrication results indicate that the machine comprises 12 principal components and operates reliably in evenly stirring the Jenang dough, making it suitable for small to medium-scale production.
Optimization of solar panel orientation and tracking systems for standalone PV applications Prasetyo, Singgih Dwi; Trisnoaji, Yuki; Munir, Misbahul; Permatasari, Meirna Puspita; Mahadi, Abram Anggit; Rizkita, Marsya Aulia; Arifin, Zainal
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 16, No 4: December 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v16.i4.pp2721-2730

Abstract

The performance of photovoltaic (PV) systems is greatly influenced by the angle of arrival of sunlight and the geometric orientation of solar panels, especially in tropical regions with the potential for solar energy throughout the year. This study aims to evaluate the effect of tilt angle variation and tracking systems on energy output and performance indicators of standalone PV systems using PVsyst software. The simulation was conducted at the State University of Malang, Indonesia, by comparing four fixed-angle configurations (20°, 40°, 60°, and 80°) as well as a two-axis tracking system. The simulation results showed that the two-axis tracking system produced the highest normalized daily energy production of 6.8 kWh/kWp/day, with a performance ratio (PR) of 77.2% and a solar fraction (SF) of 97.1%, while a fixed configuration with an angle of 80° showed the lowest performance. These findings confirm the importance of selecting optimal panel orientation to maximize the efficiency of PV systems, as well as being the basis for the development of advanced research, such as field-based experiments, integration of adaptive MPPT algorithms, and economic feasibility studies in the application of PV systems in tropical and off-grid regions.
Simulasi dan Pembuatan Prototipe Generator Listrik Bertenaga Langkah Mekanis untuk Aplikasi Energi Terbarukan Nur Afiqoh, Nabella Sofa; Trisnoaji, Yuki; Novena, Nindia Nova; Atha, Muh Farhan
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.329

Abstract

The design and fabrication of a Mechanical Footstep Power Generator was developed as an innovative approach to harness kinetic energy from footsteps and convert it into electrical energy. Using a fabrication analysis and Design for Assembly (DFA) method, the prototype was designed to be both efficient and easy to assemble. The system consists of nine primary components, including the top plate, bottom plate, gear plate, gear, pinion, spring, dynamo (DC), long bolt M12, and nut. Fabricated parts were processed through tapping, drilling, milling, grinding, shaping, and chamfering, while other components were commercially purchased. DFA analysis indicated a medium level of assembly complexity, with potential errors mitigated by applying error proofing and systematic assembly guidelines. Experimental testing demonstrated a consistent increase in electrical output corresponding to the number of steps applied, starting from 2.96 V and 0.0074 W at the first step, reaching 5.71 V and 0.051961 W at the twentieth step. These results confirm that the prototype can reliably convert mechanical energy into electrical energy, though its application is currently limited to low-power usage. Nevertheless, the system presents significant potential for future development aimed at improving efficiency, capacity, and broader applicability in renewable energy solutions.
Tinjauan Komprehensif Teknologi Pemulihan Panas Terbuang (Waste Heat Recovery) pada Sistem Boiler untuk Peningkatan Efisiensi dan Reduksi Emisi Dzaky Abdad, Muhammad Rafif; Rochma Fa’alih, Saika Khoolish; Nurhuda Rizkiawan, Wildan Yusril; Dwi Putra, Muhamad Fraja; Trisnoaji, Yuki
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.352

Abstract

This systematic literature review examines the application of Waste Heat Recovery (WHR) technologies in boiler systems to improve thermal efficiency and reduce CO₂ emissions. Using the PRISMA 2020 framework, 20 relevant studies published between 2010 and 2025 were selected through predefined eligibility and quality criteria. A thematic analysis was conducted to synthesize methodological approaches, performance outcomes, and implementation challenges across the included studies. The findings indicate that WHR integration can enhance thermal efficiency by up to 20.3%, provide fuel savings of 17.9%, and reduce CO₂ emissions by approximately 180 kg/MWh. Heat Recovery Steam Generators (HRSG) and Organic Rankine Cycle (ORC) systems demonstrate the highest performance levels, although their adoption is often constrained by higher capital costs and engineering complexity. The review also highlights gaps in policy incentives and regulatory support, which remain significant barriers to large-scale deployment. Overall, WHR technologies present a strategic pathway for improving industrial energy efficiency and advancing decarbonization efforts through a synergistic interplay of technological innovation, economic feasibility, and supportive policy frameworks.  
Evaluasi Sistematis Efisiensi Turbin Angin Lepas Pantai Terapung dan Potensi Reduksi Emisi Karbon Salsabila, Salma; Prasetyo, Sigit; Wicaksana, Putra Adil; Sa’Diah, Siti Dhurrotus; Dzaky Abdad, Muhammad Rafif; Trisnoaji, Yuki
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.357

Abstract

The growing demand for clean energy has accelerated interest in Floating Offshore Wind Turbines (FOWTs), which enable efficient wind energy harvesting in deep-water regions. This study conducts a systematic literature review across four major databases, Scopus, ScienceDirect, SpringerLink, and Google Scholar, to evaluate the energy efficiency, carbon emission reduction potential, and economic feasibility of FOWT systems. The findings indicate that combined configurations, such as Spar–TLP and multi-turbine platforms, provide the highest energy conversion performance and structural stability, contributing to up to 17% in carbon emission reduction. Economically, several studies report competitive Levelized Cost of Energy (LCOE) and relatively short payback periods. This research strengthens the understanding of FOWT performance by integrating global evidence into the context of marine energy sustainability. However, methodological limitations arise from data variability across studies and the dominance of simulation-based analyses. Further research is required to optimize mooring systems and adapt FOWT designs to tropical and archipelagic environments, such as those found in Indonesia.