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Energy: Jurnal Ilmiah Ilmu-ilmu Teknik
Published by Universitas Panca Marga Probolinggo
ISSN : 20884591     EISSN : 29622565     DOI : https://doi.org/10.51747/energy.vol15no1
Core Subject : Science, Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Energy Journal serves as a platform for information and communication of various research findings and scientific writings in the field of engineering, contributed by practitioners, researchers, and academics who are involved in and have a keen interest in the development of science and technology. The scope of the Energy Journal covers all branches of engineering, including but not limited to: Electrical Engineering Mechanical Engineering Industrial Engineering Engineering Physics Chemical Engineering Materials and Metallurgical Engineering Environmental Engineering Mining Engineering Civil Engineering Architectural Engineering Computer Engineering Informatics Engineering Geodesy and Geomatics Engineering And other engineering disciplines not explicitly mentioned
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 115 Documents
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Design Analysis of an Adjustable Road Bicycle Stem Based on Ergonomics and Biomechanics Armando Edo Anggriawan; Retno Widyaningrum
ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK Vol. 16 No. 2 (2026): ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK (July-November 2026 Edition)
Publisher : Universitas Panca Marga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51747/energy.v16i2.p459-473

Abstract

Road bicycles are designed to achieve aerodynamic efficiency through a forward-leaning riding posture. Although this position can improve cycling performance, it may also increase biomechanical loading and the risk of musculoskeletal complaints when it is not aligned with the rider’s anthropometric characteristics. The limited adjustability of conventional bicycle stems further restricts riders from achieving a more ergonomic riding position. This study investigated the ergonomic and biomechanical performance of an adjustable road bicycle stem developed to provide greater flexibility in handlebar positioning. A comparative experimental design was employed involving 30 road cyclists, with measurements conducted before using the standard stem and after using the adjustable stem prototype. Riding posture was assessed using motion capture to determine trunk flexion angle, while biomechanical loading was evaluated by calculating trunk moment. Ergonomic performance was assessed using the SNI 9011 questionnaire for musculoskeletal complaints. The adjustable stem increased the mean trunk flexion angle from 30.73° to 52.90° and reduced the average trunk moment from 193.94 Nm to 136.13 Nm. Participants also reported lower musculoskeletal complaint risk following use of the prototype. These findings suggest that the adjustable stem offers a more adaptable riding position and contributes to improved ergonomic performance by reducing biomechanical loading. The study provides evidence that incorporating ergonomic and biomechanical considerations into bicycle stem design can support the development of road bicycle components that better accommodate variations in rider characteristics.
Development of a Safety-Support Prototype for Artisanal Hookah Divers Susana Merary Romero Benitez; Retno Widyaningrum; Aqilah Gusti Nindira
ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK Vol. 16 No. 2 (2026): ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK (July-November 2026 Edition)
Publisher : Universitas Panca Marga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51747/energy.v16i2.p474-489

Abstract

Artisanal hookah divers in small-scale fisheries face significant occupational safety risks because they rely on surface-supplied compressors and long breathing-air hoses, while existing commercial dive computers are not designed for this operational context. This study aimed to develop a safety-support prototype tailored to the needs of artisanal hookah divers using a human-centred design approach. User needs were identified through preliminary field observations and supported by literature, safety standards, and technology benchmarking. These needs were translated into system requirements and prioritised using an evidence-weighted engineering design process to guide prototype development. The resulting prototype integrates a diver-mounted monitoring module, a surface monitoring and control unit, and a compressor-side flow-proxy module connected through a wired communication pathway. The analysis identified reliable wired communication between the diver and the surface unit as the highest engineering priority, and the prototype successfully implemented a functional manual surface-to-diver warning mechanism. This study contributes a context-specific prototype that reallocates safety-support functions between the diver and the surface operator, providing a practical design framework for improving occupational safety in artisanal hookah diving. Technical validation and field evaluation remain subjects for future research.
IoT-Based Automated Irrigation for Pak Choy Using Aquaculture Wastewater Mukhsin Mukhsin; Denny Arief Rusamsi; Alfian Atoillah Falahuddin
ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK Vol. 16 No. 2 (2026): ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK (July-November 2026 Edition)
Publisher : Universitas Panca Marga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51747/energy.v16i2.p519-530

Abstract

Efficient irrigation management and nutrient utilization are essential factors in improving pak choy productivity. This study proposes an Internet of Things (IoT)-based automated irrigation system that integrates an ESP32 microcontroller, soil moisture sensors, rain sensors, Telegram Bot, and n8n workflow automation. The system applies growth-stage-based irrigation scheduling and utilizes catfish pond wastewater as an alternative nutrient source. Irrigation volumes were dynamically adjusted according to plant growth stages, consisting of 0.65 L (days 1–14), 0.63 L (days 15–21), and 0.37 L (days 22–35). System performance was evaluated through communication testing, confusion matrix analysis, and plant growth observations. Experimental results showed average end-to-end delays of 6.0 s for Telegram communication and 11.3 s for n8n integration, with an average command latency of 2.779 s. The irrigation decision mechanism achieved 90% accuracy, 88.9% precision, and 91% recall. Furthermore, pak choy irrigated with catfish pond wastewater demonstrated superior growth performance, reaching 16 cm plant height, 20 leaves, and 81 g harvest weight, compared with 14 cm, 16 leaves, and 67 g under conventional irrigation. These findings demonstrate that the proposed system provides reliable irrigation automation while supporting sustainable agriculture through the reutilization of aquaculture wastewater.
Productivity Measurement of Fried Onion Production After Hot Air Dryer Implementation Muhammad Yusuf; Ainur Rofiq Ainur Rofiq; Jusef Saeful
ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK Vol. 16 No. 2 (2026): ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK (July-November 2026 Edition)
Publisher : Universitas Panca Marga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51747/energy.v16i2.p490-501

Abstract

Conventional sun drying in fried onion production causes weather dependency, prolonged processing time, inconsistent schedules, and limited production capacity, particularly for Micro, Small, and Medium Enterprises (MSMEs). This study evaluates the impact of implementing a Hot Air Dryer (HAD) system on production productivity at UD. Dua Sejati, Banyuwangi, Indonesia. A before-and-after comparative design was employed, with data collected over five working days before and after HAD implementation. Productivity was assessed using the partial productivity approach, comparing output against labor hours and process time. The results showed that the HAD system reduced drying time by 58.3% and overall production cycle time by 38.7%. Consequently, daily production capacity increased by 63.1%, while labor and process productivity both improved by approximately 63%, achieved without additional labor or working hours. This study contributes novelty by empirically quantifying the productivity impact of drying technology implementation—a dimension largely overlooked in previous research that focused predominantly on drying kinetics and energy efficiency. The findings demonstrate that HAD technology is a practical and economically feasible solution for eliminating production bottlenecks, enhancing operational performance, and improving competitiveness in food-processing MSMEs. These results offer valuable guidance for similar enterprises seeking low-cost technological innovation to achieve sustainable production.
Evaluation of Nano-Scale ZnO Coatings Prepared via the Sol–Gel Method on Cast Iron Piston Rings: Tribological Performance Fabrobi Ridha; Nurul Hidayana; Haidzar Nurdiansyah; Zaid Sulaiman
ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK Vol. 16 No. 2 (2026): ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK (July-November 2026 Edition)
Publisher : Universitas Panca Marga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51747/energy.v16i2.p501-518

Abstract

This study evaluated the structural, thermal, and tribological performance of nano-scale ZnO coatings synthesized via a sol–gel method and deposited on FC-25 grey cast iron substrates using dip-coating followed by annealing at 400 °C. Three precursor molarities (0.1 M, 0.2 M, and 0.4 M) and two dipping cycles (1× and 2× dip) were investigated. Structural characterization confirmed the formation of crystalline hexagonal wurtzite ZnO after annealing. Thermogravimetric analysis indicated a 4.48% mass loss in non-furnaced samples due to organic precursor decomposition, whereas annealed samples exhibited a stable relative mass change (+4.68%). Scanning electron microscopy revealed post-annealing microcracks resulting from volumetric shrinkage and thermal expansion mismatch. Tribological testing under ASTM G99 conditions demonstrated that the coated specimens did not outperform the untreated cast iron substrate (friction force: 0.89±0.22" N" ; CoF: 0.18±0.05; wear depth: 6.6±2.1 μ"m" ). Among the coated conditions, performance was strongly governed by process parameters: double-dipping at low molarity (2× Dip, 0.1 M) produced the highest wear and friction (friction force: 4.91±1.55" N" ; CoF: 1.00±0.32; wear depth: 131.4±69.3 μ"m" ), whereas increasing precursor molarity (2× Dip, 0.4 M) substantially mitigated wear degradation (friction force: 1.63±0.57" N" ; CoF: 0.33±0.10; wear depth: 41.5±14.8 μ"m" ). Two-way ANOVA confirmed that precursor molarity exerts a primary statistically significant effect (p<0.05) alongside a significant interaction with dipping cycle (p<0.05). These results demonstrate that coating structural integrity and stress management play a more critical role than bulk crystallinity in dictating tribological performance.

Page 12 of 12 | Total Record : 115

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