The Analysis Of Field Synergy To Optimize The Performance Of Liquid Desiccant

With the environmental problem and energy problem emerging,air condition technology has been developing constantly.As a prospecting technology,the THIC technology becomes a hot topic,and as a concrete form of THIC,liquid desiccant has been studied in many aspects.In order to optimize the liquid desiccant technology,this paper uses field synergy theory and to optimize the liquid desiccant technology.Firstly,this paper simulates the liquid desiccant between double tube and then discuss the distribution of flow regime,the changes of vector field and the distribution of field synergy angle.This paper uses the angle between velocity vector and concentration gradient as the standard to measure mass transfer synergy angles in different flow regime,and then indicates that the mass transfer synergy performance of drops and columnar is better than the stabilized liquid membrane.There is a further discussion about the applicability analysis of three kinds of mass transfer synergy angles,which are quality-weighted synergy angle,velocity-weighted synergy angle and arithmetic average synergy angle;and the results show that these angles share the consistent change trend.This paper uses the angle between velocity vector and temperature gradient as the standard to measure heat transfer synergy angles near the pipe wall,and then qualitatively indicates that the heat transfer synergy performance of drops and columnar is better than the stabilized liquid membrane near the pipe wall.Secondly,this paper simulates the process of liquid desiccant occurring in two different structural forms of the model.This paper analyzes the parameter distribution of velocity and moisture content.In combination with mass transfer synergy,there is a comparison of mass transfer synergy performance for two different structure forms of model.Results show that the mass transfer synergy angle of fork row model is 96?,and the mass transfer synergy angle of aligned arrangement model is 92?,which means the mass transfer synergy performance of fork row model is better than aligned arrangement model.This paper uses the outlet moisture as the standard to measure the performance of dehumidification,and there is a discussion about two different structure forms' performance with different factors,such as the velocity of inlet air and solution concentration.The fork row model generally have better mass transfer synergy performance than aligned arrangement.On that basis,this paper adopts the better form model and makes three-dimensional simulation.Then,this paper gets the simulation results about the parameter distribution and dehumidification characteristics in different conditions.Simulation shows that moisture constantly decreases along the direction of export;the temperature of pipe is lower than other regions;pressure in equipment is uniform.Finally,this paper makes dehumidification experiments to test performances under different conditions.Results show that the efficiency of dehumidification decreases with inlet velocity of air,and the rate of dehumidification increase with solution concentration,inlet velocity of air,moisture of air and inlet velocity of solution.The differential analysis of reality and simulation is ±20%.