Evaluation And Optimization Of Vertical Spray Chamber Based Entransy Dissipation Theory

Mine temperature and humidity year-round constant temperature from 15~30 DEG C,,humidity in more than 90%,is a kind of high quality waste heat resources.The coupling water source heat pump system can realize the utilization of the waste heat resource of the return air in technology.The core research object is the heat recovery system of the mine return air spray.Therefore,in this paper,the gas-water heat and moisture exchange as the object,first of all,on the basis of the existing water droplet movement law and the Force analysis,the development of the gas-moisture countercurrent heat and moisture exchange coupled two-dimensional droplet movement law of the mathematical model,and experimental results in good contrast.Under the condition of considering the influence of the wall on the droplet trajectory,the relationship between the factors affecting the impact of the water droplet on the wall is derived,and the factors affecting the impact of the water drop on the wall are analyzed.Secondly,according to the heat and moisture transfer mechanism of high humidity air and spray water,based on the study of thermodynamic parameter "fire accumulation" and "fire used" in heat and mass transfer,the effect of heat and moisture exchange between wet air and spray water in spray chamber is improved.In order to obtain the system optimization method,on the basis of analyzing the existing thermodynamic parameters and evaluating the deficiency of heat and moisture exchange process between high humidity air and spray water,By introducing the thermodynamic parameter "fire accumulation",the "fire accumulation" dissipation model used to describe gas-water heat and moisture exchange is developed,and the loss of "fire accumulation" in the process of gas-water heat and humidity exchange is analyzed in detail.Based on the principle of minimum dissipation loss and minimum dissipative thermal resistance of "fire accumulation",it is found that there exists an ideal heat and moisture exchange process,and the parameters used to evaluate the thermodynamic perfection of the system are proposed.The formula for optimizing the water vapor ratio equation is obtained,which provides a theoretical reference for the theory of heat and moisture transfer and engineering application.On this basis,the parameters of spray chamber structure and spray arrangement are optimized by simulation orthogonal test,and the optimization parameter combination is obtained.In this section,an engineering example is introduced.In order to solve the problem of low heat transfer efficiency caused by the change of environment,this paper presents the control method of the heat recovery system of the mine return air,and obtains the optimized combination method by using the traditional orthogonal experiment.In this paper,four evaluation indexes of heat exchange and "fire accumulation" dissipation resistance,"fire used" efficiency and thermodynamic perfection are compared and analyzed.This project lays a good foundation for spraying room design,obtains a series of mathematical model,criterion and calculation program,and its follow-up research is expected to deepen the theory and guide its engineering application.