基于■耗散理论喷淋室内水气比的优化研究

Study of The Performance Optimization of Water-Gas Ratio Based on Entransy Theory in Spray Chamber

为了分析水气比对喷淋室气-水逆流传热传质效果的影响规律,寻求喷淋换热系统优化水气比的方法。本文根据气-水传热传质能量守恒方程,推导得出理论最优条件下水气比计算方程。基于[火积]耗散理论,对此方程进行了验证。并利用此最优水气比计算方法,对比了三种工况下(M1、MO、M2)水气比对空气出口温度、全热换热量、[火用]效率及[火积]煅耗散热阻的影响规律,结果表明:对于给定状态的饱和湿空气和水的传热传质过程,存在一个最优水气比,此时[火积]耗散热阻最小且等于0,[火用]效率达到最大值。

In order to analyze the influence of water-air ratio on heat and mass transfer of spray chamber air-water countercurrent,the optimizing method of water-air ratio in the spray chamber system is explored.Based on energy conservation equation of heat and mass transfer of air and water,the calculation equation of water-air ratio under the optimal condition is derived.And based on entransy dissipation theory,the equations are proved.By the optimal calculation method of water-air ratio,the influences of water-air ratio(M1,MO,M2)on air outlet temperature and total heat exchange capacity,exergy efficiency and entransy dissipation thermal resistance under three working conditions are compared,the results show that there is an optimal water-air ratio for each heat and mass transfer process of saturated humid air and water in a given state,while the thermal resistance of entransy dissipation is minimum and equal to 0,the exergy efficiency reaches the maximum.