Method for collecting electric energy by utilizing low-speed airflow flow-induced vibration

Abstract

The invention discloses a method for collecting electric energy by utilizing low-speed airflow flow-induced vibration. According to the method, low-speed airflows are subjected to rectification and acceleration through a wind flow collecting passage, a flow surrounding vibration blunt body generates vortex shedding, the vibration blunt body is excited to vibrate, fluid flowing energy is converted into the vibration mechanical energy of the vibration blunt body, and an electro-magnetic induction generator is utilized for converting the vibration mechanical energy of the vibration blunt body into electric energy; and in the vortex forming process, the downstream moving is caused, a flexible piezoelectric vibration sheet is further excited to generate deformation and swings along with the vortex flowing, the vibration blunt body drives the flexible piezoelectric vibration sheet to move, and the fluid flowing energy is directly converted into the electric energy. The method for collecting the electric energy by utilizing low-speed airflow flow-induced vibration is simple, the required starting wind speed is low, the energy conversion efficiency is high, two modes including electro-magnetic induction and piezoelectric effect are adopted, and the electric generation capability is greatly improved.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a method for collecting electric energy by causing flow-induced vibrations caused by low-speed air flow around a blunt body. Background technique [0002] With the development of the world economy, energy issues have become a hot spot in the world. The use of fossil energy has made environmental pollution more and more serious. The development and utilization of new energy and renewable energy has become the focus of development in the current energy field. Flow energy in the environment is a very important resource, and wind energy is a ubiquitous renewable resource. Wind power generation is a major form of utilization of wind energy. The generator power of the first wind turbine that operates automatically and is used for power generation is only 12 kilowatts. The "wind farm" proposed by scholars later enabled various countries to develop wind power on a large scale. Ho...

AI Technical Summary

Problems solved by technology

[0004] Existing wind power generation technology mainly utilizes rotary electromagnetic induction generators, which require high wind speed to start, high energy loss and low efficiency

Many forms of flow-induced vibration power generation technology have been proposed, but most of them are concentrated in water flow, and there are defects such as unreasonable technology (structure), small power generation, and difficult system design, especially for the use of low-speed airflow.

The technology of using the breeze with low flow velocity to generate flow-induced vibration to generate electricity has not yet been reported

Images