CALCULATION OF HEAT EXCHANGE FOR VARIABLE-HEAT-CAPACITY FLOWS

The authors have obtained minimum conditions for the irreversibility and the contact surface of double-fl ow heat exchange with a prescribed total heat load with various constraints imposed on the set of permissible fl ow temperatures. Consideration has been given to fl ows with a constant heat capacity and to fl ows with a temperaturedependent heat capacity and, in particular, changing their phase state, that are of arbitrary high heat capacity at the boiling/condensation point. It has been shown that the obtained relations yield the existence of realizability limits of the process and relations have been derived to calculate them. For variable-heat-capacity fl ows, the entropy production in their mixing has been obtained
   
Author:  A. M. Tsirlin ,  L. G. Gagarina
Keywords:  double-fl ow heat exchange, irreversibility, contact surface, heat load, entropy production
Page:  283