Research On The Mechanism Of Triboelectric Nanogenerator For Water Energy Collection In Ship Cooling Water System

The monitoring and maintenance of the ship ’s cooling system needs to rely on various types of sensors,which has higher requirements for the power supply system installed in the cooling water system,and requires a reliable energy that can be distributed and transform the tiny energy in the environment.With the application research and theoretical development of triboelectric nanogenerator technology,triboelectric nanogenerators relying on solid-liquid contact have emerged,and there have been examples and research results in the application of liquid flow energy collection and self-powered sensing.Based on the principle of solid-liquid triboelectric nanogenerator,a triboelectric nanogenerator for collecting water flow energy of cooling water system is designed and fabricated by using single electrode structure.The main research contents and conclusions are as follows :(1)The single-electrode solid-liquid friction nanogenerator suitable for cooling water pipeline system is studied,and the feasibility of the scheme is verified by mechanism verification test.The output characteristics of solid-liquid friction nanogenerator under different flow conditions are studied.The results show that the tubular single-electrode solid-liquid triboelectric nanogenerator can collect the liquid flow energy on the pipe wall.When the pipe contains air,unstable and discontinuous flow occurs,the open-circuit voltage output performance of the triboelectric nanogenerator is improved.(2)The effects of structural factors such as substrate,electrode length and multi-unit joint work on the power generation performance of solid-liquid TENG were studied by changing the structure.The results show that the output performance of the solid-liquid triboelectric nanogenerator with the substrate removed is improved.The area of the electrode determines the basic output performance of the solid-liquid triboelectric nanogenerator.The larger the electrode area,the stronger the output performance of the solid-liquid triboelectric nanogenerator.In the case of the same total electrode area,the output performance of multiple tubular solid-liquid triboelectric nanogenerator units in parallel flow is higher than that of multiple tubular solid-liquid TENG units in series flow.(3)In order to study the influence of environment on the power generation performance of triboelectric nanogenerator,the influence of environmental factors such as water temperature,water quality and flow state on the performance of solid-liquid triboelectric nanogenerator was studied by using the same structure to change the environmental conditions.The results show that the water temperature has a negative correlation with the output performance of the solidliquid triboelectric nanogenerator.When the ion concentration in water increases,the performance of the solid-liquid triboelectric nanogenerator increases first and then decreases.(4)In order to improve the power generation performance,based on the research results of the influence of the structure on the power generation performance of the solid-liquid friction nanogenerator,the optimized solid-liquid friction nanogenerator structure was fabricated and the power generation performance test was carried out again.The results show that the output performance of the optimized solid-liquid friction nanogenerator has been greatly improved.