International Journal on Science and Technology

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Exploring the Feasibility of Gravity-Based Energy Conversion for Sustainable Electricity Generation

Author(s) Agus Margiantono, Supari, Titik Nurharyanti
Country Indonesia
Abstract This study demonstrates that gravity-based energy conversion systems have tangible potential as small-scale power generators. Using a 150 kg weight suspended at a height of 2 meters, a potential energy of 2,943 Joules was successfully converted into rotational energy through a pulley system and a four-stage gearbox. Experimental results showed a gradual torque reduction from 5.52 Nm at the first shaft to 0.045 Nm at the fourth, accompanied by an increase in rotational speed from 28.57 rpm to 740 rpm. Mechanical power decreased from 0.301 W to 0.134 W, consistent with typical energy losses in mechanical systems. The total system efficiency was calculated at 44.5%, which is promising for a simple prototype design. Regression analysis revealed a linear relationship between torque and power with R² ≈ 0.95, indicating mechanical stability and predictable output characteristics. Efficiency calculations estimated that a torque input of 6,700 Nm at the primary shaft would be required to achieve a generator torque of 30 Nm at 2,500 rpm, meeting the output requirements for 3.8 kW electrical generation. Overall, the results quantitatively verify the technical feasibility of employing gravity-based systems for small-scale electricity generation, although efficiency improvements are still necessary.
Keywords gravity energy, mechanical transmission, power efficiency, micro-generation system, torque-power relationship.
Field Engineering
Published In Volume 16, Issue 3, July-September 2025
Published On 2025-07-08
DOI https://doi.org/10.71097/IJSAT.v16.i3.6574
Short DOI https://doi.org/g9sx7c
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