A new concept called entropy generation effectiveness(EGE) which is same as heat transfer effectiveness is advanced,and the irreversibility of heat exchanger is evaluated by using EGE.

• 以热力学第二定律为基础讨论了理想的逆流、并流和错流型换热器的不可逆损失,并且提出采用熵产效率评价换热器的不可逆程度。