chapter  4
42 Pages

Entropy generation in heat transfer

Coincidentally, this goal agrees with the objectives of contemporary thermal design practice. In very broad terms the contemporary heat transfer design objectives fall into two large categories:

a heat transfer augmentation problem is one in which the thermal conductance hA is to be increased. In such a problem the heat transfer rate is usually prescribed by design, hence increasing the thermal conductance leads to improved thermal contact (lower temperature difference, T1 - T2). At the same time, as shown in Equation (2.41), the entropy generation rate also decreases.