Based on the first and second thermodynamic laws, a new systematic approach to study in detail the exergy transfer processes of forced convective heat transfer through a duct with constant wall temperature for fully developed turbulent flow is introduced. Some definition formula of the local and mean convective exergy transfer coefficient, convective exergy resistance, exergy flux and exergy-transfer Nusselt number etc have been provided and their new generalized expressions are derived. By reference to smooth duct, the numerical results of exergy transfer are obtained, the effect of Reynolds number and different cross-sectional position in the duct on exergy transfer process is analyzed. In addition, a comparison of the results of exergy transfer with that of energy transfer is also discussed.

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