导热优化中的最小传递势容耗散与最小熵产

为了比较分析强化传热中存在的熵产最小化和传递势容耗散最小化两种不同的方法,针对体点问题,根据这两种方法对导热系数分布进行了优化。数值计算和理论分析的结果表明,根据最小传递势容耗散原理得到的结果优于最小熵产原理得到的结果。其原因在于传递势容耗散最小的优化目标是提高热量传递效率,而熵产最小的优化目标实际上是减少可用能损失。

POTENTIAL CAPACITY DISSIPATION MINIMIZATION AND ENTROPY GENERATION MINIMIZATION IN HEAT CONDUCTION OPTIMIZATION

Two methods in the heat transfer enhancement, the entropy generation minimization and the potential capacity dissipation minimization, are compared by the heat conductivity optimization in volume-to-point problem. The numerical and analytic results show that the heat transfer rate obtained by potential capacity dissipation minimization is better than that by entropy generation minimization. The comparison shows that potential capacity dissipation minimization is to maximize the heat transfer rate, while the entropy generation minimization is to minimize the loss of available energy.