Abstract: Based on the first and second laws of thermodynamics and the theory of non-equilibrium thermodynamics, a new systematic approach to studying the exergy transfer processes of forced convective heat transfer through a duct with constant heat flux for fully developed turbulent flow was introduced.The local and mean convective exergy transfer coefficient, exergy flux, exergy-transfer Nusselt number were defined and the equation of convective exergy transfer rate was developed and their new generalized expressions were derived.By reference to a smooth duct, the numerical results of exergy transfer characteristics were obtained,and the effects of Reynolds number, non-dimensional heat flux and different cross-sectional locations in the duct on exergy transfer process were analyzed.In addition, a comparison of the results of exergy transfer with that of energy transfer was also discussed.

摘要： 从管内传热与流动的特点出发，基于热力学第一、第二定律和非平衡热力学理论，对壁面恒热流工况下，管内充分发展段对流换热的火用传递过程进行了研究，定义了对流换热传火用系数、火用流密度、传火用Nusselt数和对流换热火用传递方程，并导出相应的计算式;讨论了Reynolds数、量纲1热通量和不同截面位置等参数对对流换热火用传递过程的影响;最后将传火用和传热的结果进行了比较.