The idea you've described involves using small, lightweight spheres with thin aluminum sheets inside, and small grains such as sand as the ball. These spheres would be connected in series on wires and hung in a setup to catch wind and generate energy through vibration using shaker generators. While this concept is interesting, there are several practical considerations that would need to be addressed to determine its feasibility and potential energy output.
First, the mechanical design of the spheres would need to be carefully engineered to ensure they are durable and able to withstand the forces of wind and vibration over time without deforming or breaking. Additionally, the spheres would need to be aerodynamically designed to efficiently catch wind and convert its kinetic energy into vibrational motion.
Second, the electrical design would need to consider the potential difference generated across the aluminum sheets inside the spheres. The size and configuration of the aluminum sheets, as well as the properties of the small grains used as the ball, would affect the magnitude of the potential difference and the resulting electrical output. The non-uniformity of current across the aluminum sheets could potentially impact the efficiency of the system, and would need to be carefully considered and mitigated.
Third, the actual energy output from such a setup would depend on various factors, including the wind speed, the number and size of the spheres, and the efficiency of the shaker generators. It would be important to conduct experimental testing to determine the actual power output of the system under different wind conditions.
As for your idea of harvesting the energy as heat by passing large current discharges through the sand or other grains, it would require careful consideration of the heat generated, potential safety risks, and the overall efficiency of the energy conversion process.
Overall, while the concept of using lightweight spheres with aluminum sheets and small grains for wind energy harvesting through vibration is intriguing, it would require careful engineering and experimentation to determine its feasibility and potential energy output. Consulting with experts in the field of renewable energy and mechanical and electrical engineering would be advisable to further explore and develop this idea.