Analysis Of Electrostatic Atomized Solar Desalination Evaporation System

Desalination is an effective way to alleviate global water shortages.Solar desalination technology without the external energy supply to adapt to the environment can be of good application value.In this paper,the electro-atomization technology is introduced to make the liquid in a high-voltage electrostatic field environment,and at the same time rapidly expand the surface contact area of seawater to improve the heat transfer efficiency so as to improve the system efficiency of thermal solar seawater desalination.In this paper,the heat transfer and evaporation processes of droplets and high temperature interface in different high-voltage electrostatic atomization modes are studied.(1)The factors affecting the evaporation of droplets in natural state are analyzed,and the mathematical model for calculating the evaporation rate of droplets in natural state has been established.Evaporation analysis of atomized droplets provides a reference.(2)According to the theory of heat conduction,the paper has established a mathematical model of electrostatic atomization droplet evaporation heat transfer and electrostatic atomization droplet evaporation rate,and analyzed the heat transfer process of electrostatic atomized droplets in different modes;(3)The paper has established electrostatic atomization charge.The equation of motion of the electric droplets under the action of the coupling field is used to analyze the motion law of the electrostatically atomized droplets in the coupled field.(4)The relationships between the flow rate and the atomized droplet energy storage,energy release and interface temperature heat transfer have been established.The findings show that the liquid charging voltage is 8KV,and the energy absorption and release of the atomized droplets reach a dynamic equilibrium when the droplet flow rate is 347ml/min;the liquid flow rate is the largest at 73.33ml/min,and the droplet evaporation is at 36.67ml/min.(5)The paper has also established a relationship between the flow rate and the electrostatic mist droplet energy storage,energy release,evaporation,evaporation rate and collector tube interface temperature;the liquid flow rate and the atomization droplet evaporation rate show a parabolic trend.When the liquid evaporation voltage of electrostatic atomization is 10 KV,it increases with the decrease of the flow rate of the charged liquid.(6)The evaporation amount,evaporation rate and droplet temperature of the electrostatic atomization droplet have been obtained.The temperature of the interface of the collector tube changes with the electric field;the evaporation amount of the atomized droplet increases monotonously with the increase of the electric field strength until it reaches saturation state,and the electric field strength has a field strength enthalpy with the largest increase in evaporation efficiency.After reaching the threshold value,the continuing to increase the electric field strength will not effectively increase the evaporation rate of the droplets.In this paper,the experimental data and the relationship curve of electrostatic atomization droplet evaporation system in different modes can be used for the efficient combination of electrostatic atomization and traditional seawater desalination distillation technology,providing a reference literature for the mathematical model of electrostatic atomization solar seawater desalination vapor diffusion.