Recently, researchers from the Beijing Institute of Nano Energy and Systems, Chinese Academy of Sciences and other institutions have developed a triboelectric nanogenerator for omnidirectional water wave energy collection. The device can effectively collect water wave energy of different frequencies through resonance effect, and has obtained good experimental results in the water wave test. On May 26, related papers were published in "Joule".
Wang Jie, the corresponding author of the paper and a researcher at the Beijing Institute of Nano Energy and Systems of the Chinese Academy of Sciences, said that although electromagnetic generators have developed into the mainstream of mechanical energy collection technology, they are limited by their high price, large size, and low low-frequency efficiency. The best choice for large-scale wave energy collection. The triboelectric nanogenerator (TENG), which has the advantages of low price, light weight, low frequency and high efficiency, is considered to be one of the most effective technologies for ocean wave energy collection. However, related research cannot achieve the collection of omnidirectional and full-frequency water wave energy, and the problem of water shielding effect on the weakening of TENG output performance needs to be further resolved.
The researchers designed an active resonant TENG (AR-TENG) for omnidirectional and full-frequency water wave energy collection. AR-TENG can adapt well to changes in the direction of water waves.
After that, the researchers used a simple pendulum and a tumbler structure to form a resonance system. AR-TENG can achieve effective collection of water wave energy at different frequencies through the resonance effect. With the high-frequency damping motion of the related structure, AR-TENG achieves high-frequency output driven by low-frequency water waves, thereby greatly improving the collection efficiency of water wave energy.
In addition, the output performance of AR-TENG has been improved more than ten times compared with the spherical TENG with point contact in the early stage. Moreover, AR-TENG has achieved similar output performance in real water waves and simulation tests.