Study on the mechanism of exergy destruction

By applying nonequilibrium thermodynamics theory to exergy analysis, the paper aims to derive the common relation between the rate of exergy destruction and the driving forces and expound the mechanism of exergy destruction caused by irreversible processes. The result shows that one type of driving force causes not only the same type of exergy destruction but also another type of exergy destruction resulting from the coupling between different types of driving force. The result also points out that for the calculation of exergy destruction in engineering, the coupling terms are generally negligible.