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All Journal Jurnal Teknik Mesin Otopro EDUCATIONE: Journal of Education Research and Review
Silvy Dollorossa Boedi
Politeknik Negeri Manado
Automotive Engineering Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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RANCANG BANGUN TURBIN KINETIK SUDU BERENGSEL LUAR SEBAGAI PEMBANGKIT LISTRIK SKALA PIKOHIDRO Silvy Dollorossa Boedi; Alfred Noufie Mekel; Adrian Maidangkay
Otopro Vol 17 No 2 Mei 2022
Publisher : Jurusan Teknik Mesin Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v17n2.p69-75

Abstract

The problem of energy shortages is still a global problem which is especially felt in developing countries whose residents live in villages, which still require the development of more efficient energy sources. The problem of meeting the availability of electricity in rural areas by utilizing water energy as new and renewable energy is a long-term goal in this research.  The goal is to obtain the value of the turbine power from the turbine design which is designed to later be able to fulfill a picohydro scale power plant. The current research on kinetic turbines is a combination of two types of waterwheels, which have a vertical axis (overshot turbine and pusher turbine). Most water turbines have fixed blades. In this research, the target of the novelty is a kinetic turbine with a vertical shaft which has a hinged blade. Hinged blades are blades that can move when the flow of water hits the blades, so that on one side of the turbine it will reduce negative torque and on the other hand it will increase turbine rotation. The results of the research that became the target were to obtain a turbine design that has more optimal turbine power and efficiency, compared to a turbine that has a fixed blade, so that this externally hinged blade kinetic turbine can contribute to the provision of rural electrical energy. The optimum value in this study is the number of blades 10 and turbine power 59.01 Watt.
DESIGN AND PERFORMANCE EVALUATION OF A 50 WP OFF-GRID SOLAR PV TRAINER KIT AS AN INSTRUCTIONAL MEDIUM IN VOCATIONAL EDUCATION Rion Michael Potoe; Silvy Dollorossa Boedi; I Gede Para Atmaja
EDUCATIONE Volume 4, Issue 1, January 2026
Publisher : CV. TOTUS TUUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59397/edu.v4i1.146

Abstract

Renewable energy has become a global priority to reduce dependence on fossil fuels, with solar power offering significant potential, particularly in equatorial countries like Indonesia. Despite abundant solar energy resources, its utilization remains limited, underscoring the need for educational interventions that build technical competencies in renewable energy. This study aims to design, construct, and evaluate the performance of a 50 Wp off-grid Solar Photovoltaic (PV) Trainer Kit as an instructional medium for vocational and higher education laboratories. The research employed a design-based approach consisting of planning, product design, fabrication, and testing. The trainer kit integrates essential components including a polycrystalline solar module, inverter, charge controller, VRLA battery, and monitoring devices. Performance testing was conducted using true outdoor experimental methods, focusing on solar radiation intensity, charging efficiency, and discharging duration. Results indicate that under clear weather conditions, the trainer achieved full battery charging in 3.5 hours, while battery discharge under a 100 W AC load lasted approximately one hour. These findings confirm the trainer’s functional reliability and its potential as an effective learning medium. The study concludes that the developed trainer kit not only enhances practical learning of photovoltaic systems but also supports national efforts in renewable energy education. The research recommends further development with larger solar module capacity and alternative battery types to expand instructional applications.
DEVELOPMENT OF A SPRING-LOADED PRESSING SYSTEM AND HUSK DISPOSAL SYSTEM FOR A COCONUT DEHUSKING MACHINE Rifan Gabriel Pantow; Andri Firmansyah Yalisando; Nazriel Jusuf; Priyono; Djefry Paulus Hosang; Fransiscus Josep Tulung; Silvy Dollorossa Boedi
EDUCATIONE Volume 4, Issue 2, July 2026
Publisher : CV. TOTUS TUUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59397/edu.v4i2.300

Abstract

The previously developed coconut dehusking machine showed operational limitations because the pressing mechanism required operator assistance and the removed husk was not continuously discharged. This study developed and functionally validated an integrated spring-loaded pressing mechanism and belt conveyor-based husk disposal system intended to stabilize coconut movement and maintain a clear dehusking area. The engineering-development process comprised problem identification, computer-aided design, fabrication and assembly, machine testing, and descriptive data analysis. The pressing subsystem used a tension spring, rollers, a belt, and bolt-type lugs to maintain contact with the coconut, whereas the disposal subsystem used a belt conveyor positioned below the dehusking zone. Functional testing was conducted with ten mature coconuts with circumferences of 54.5–57.0 cm. The mean dehusking time was 8.85 s (SD = 0.80 s; range = 7.71–10.27 s). During the reported trials, the pressing mechanism maintained contact and guided coconut rotation, while the conveyor transported the removed husk to the collection area without reported manual clearing during the dehusking cycle. These findings demonstrate successful integration and proof-of-function under the tested conditions; they do not establish comparative performance improvement because no baseline machine was tested concurrently. Further work should quantify capacity, durability, energy use, safety, and performance across a wider range of coconut characteristics and operating conditions.
Pembuatan Biobriket dari Limbah Nilam dan Sekam Padi dengan Variasi Perekat Sagu Reynaldi Pontoh; Silvy Dollorossa Boedi; Tineke Saroinsong
Jurnal Teknik Mesin Vol. 19 No. 1 (2026): Jurnal Teknik Mesin (In Press)
Publisher : Politeknik Negeri Padang

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

Abstract

The increasing global energy demand and the depletion of fossil fuel reserves have driven the search for renewable energy alternatives. Biomass-based biobriquettes offer a promising solution, particularly through the utilization of agricultural waste. This study aims to analyze the effect of sago binder variations (5%, 8%, 10%, 12%, and 14%) on the quality of biobriquettes made from a 50:50 mixture of nilam distillation waste and rice husk. Quality parameters tested include moisture content, ash content, volatile matter, and combustion rate, referring to SNI 01-6235-2000 standards. The results showed that increasing sago binder content from 5% to 14% caused an increase in moisture content (7.84% to 8.86%) and volatile matter (29.04% to 36.87%), while ash content decreased significantly (44.46% to 31.85%). The 12% binder variation produced the lowest combustion rate (0.089 g/min) with the highest durability. The 14% variation achieved the highest combustion temperature (469.0°C). All variations met SNI moisture content standards (<8%) except the 14% variation. The 12% sago binder composition is recommended as the optimal formulation for producing biobriquettes with balanced quality characteristics.
Co-Authors Adrian Maidangkay Alfred Noufie Mekel Andri Firmansyah Yalisando Djefry Paulus Hosang Fransiscus Josep Tulung I Gede Para Atmaja Nazriel Jusuf Priyono Reynaldi Pontoh Rifan Gabriel Pantow Rion Michael Potoe Tineke Saroinsong