Study On Influencing Factors Of Wind-Magnetic-Eddy Current Heating Effect

In the present situation,many rural buildings,field research stations,toll stations,stations and other decentralized buildings are more or less difficult to obtain heating or heat source problems.Therefore,direct heating with wind energy is proposed to further study and verify the feasibility of a new type of wind-magnetic-electric eddy current heating system,which will promote the green development of rural areas and improve the quality of agricultural development.It is of great significance to implement the strategy of rural revitalization.By studying the current situation of direct heating of wind energy,the characteristics of wind energy distribution in China are briefly analyzed,and the advantages of space-time matching of renewable energy and direct heating of wind energy are summarized.The principle of the wind-magnetic-eddy current heater is analyzed in detail.The principle of the wind-magnetic-eddy current heater is that the wind wheel drives the metal rotor disk to cut the magnet array attached to the stator disk.Heat is generated by the electromagnetic induction of the eddy current heat effect of the metal.Combined with the existing definitions of the heat loss of vortex current,the factors affecting the heating power of the heater,such as the heating material,the frequency of the magnetic field change,the magnetic induction intensity,etc.,are reanalyzed.It provides a theoretical basis for the design of the influence parameters in the vortex current heater.In addition,the principle and calculation method of finite element calculation theory are introduced.With the help of finite element method,the accurate simulation calculation of experimental model can be realized in the later period of time,and the time of experiment and the steps of setting up test platform are reduced.An experimental device is designed and manufactured to simulate the heating of wind,magnetic and electric eddy current.The device has high flexibility and can change the test parameters according to the need of the experiment,and designs the indexes that affect the heating power of the experiment.The effect of temperature rise of heated rotor disk in 20 min is analyzed,combining with the data comparison,and considering many factors,it is concluded that the temperature rise curve decreases with the increase of the speed of the rotor,and the air gap spacing decreases.The proper thickness of the material and the reinforcement of the magnet array,the improvement of the material of the rotor disk,the increase of the amplitude of temperature rise gradually,and the amplitude of temperature can reach 65 ℃ rapidly under the condition of limited experimental conditions.The most obvious way of temperature rise is to change the magnet array and compound the high permeability metal to the rotor disk to enhance the air gap magnetic induction intensity.If the experimental parameters are continuously optimized,the heating power can reach kilowatt level,and the effect of temperature rise can far meet the expectation of providing stable and high-power heat source.By using ANSYS MAXWELL electromagnetic analysis software,the 1:1 simulation of 3D transient field is carried out according to the experimental model,and the results of magnetic induction intensity,eddy current density,thermal power and resistance moment are obtained.The phenomenon and cause of eddy current heat generation are verified intuitively.By calculating the average heating power of rotor disk and the fitting degree of verification experiment and simulation simulation,the results show that the fitting degree of the results in the experiment is less than 10%,that is,the simulation research method is more reliable.Based on the analysis of experimental and simulation results,a kind of wind-magnetic-electric eddy current heating system is designed.The system is simple in structure and high in energy utilization ratio,which combines the wind-magnetic induction vortex heating system with the low-temperature surface radiation heating used for heating in modern cities.Through the analysis and selection of each module in the system,the economic analysis and calculation of this system and other heating methods are carried out.,this paper provides a strong basis for the practical engineering application in the future.