Abstract
We are reporting energy scavenging from fluid flows inside tubular structures using triboelectric effects. Two separate designs of triboelectric generators are proposed. A tubular design that uses liquid-solid interaction mechanism for water, and freestanding flapping films design utilizing contact-separation mechanism for wind flow energies conversions. The developed generators exhibit capabilities to produces power from fluid motions through the tube. Osmotic water having conductivity of 2.05±0.05 μS/cm provides higher triboelectric responses in comparison to tap water (conductivity of 322.0±2.0 μS/cm) flow. An average power of 37.4 μW for an osmotic water flow of82.5±0.5 cm3/s was generated for two pairs of triboelectric generators. Under a wind flow of 8.2±0.1 m/s and using three pairs of generators an average power of 144.8 μW was obtained across an optimum load resistance (RL) of 7.6 MΩ.
Highlights
With the growing demand of internet of things (IoT) and the limited lifespan of batteries prompts the demand for energy harvesting from renewable and sustainable energy sources and of developing selfpowered electronics systems
The tubular triboelectric generator having a diameter of 16 mm with two electrodes that was used to harvest water flow energy has two electrodes
In summary, we have demonstrated the implementation of triboelectric effect for fluid flow, namely, water and wind flow, energy harvesting within enclosed pipe system
Summary
With the growing demand of internet of things (IoT) and the limited lifespan of batteries prompts the demand for energy harvesting from renewable and sustainable energy sources and of developing selfpowered electronics systems. Mechanical/ kinetic energies, that is generally wasted in everyday life, including water and wind flow energies can be harnessed to power low-power electronics. Different principles, such as, electromagnetic [1] and piezoelectric [2], can be implemented to convert fluid flow energies to electrical signal. Triboelectric nanogenerator (TENG), that uses contact electrification and electrostatic induction mechanisms [3], has attracted extensive attention to harvest energy from kinetic motions/ vibrations implementing various designs because of simple fabrication process, possibilities of using wide varieties of materials and high energy conversion efficiency [4]. Fluid flow energy conversion through supply pipes infrastructure using triboelectric effect remains little explored
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