Method and device for indirect heat exchange

摘要

The invention relates to a method and a device for indirect heat exchange between at least a warm fluid flow 2, which over a given period changes essentially linearly from a low temperature level to a higher temperature level, and at least one fluid flow 5 that is colder relative thereto. A heat carrier flowing in its own circuit 3 serves as intermediate medium. The heat carrier circuit 3 connects two heat exchangers 1, 4 to which the warm fluid flow 2 is applied, on the one hand, and the colder fluid flow 5 is applied, on the other hand. Mutually independently connected heat accumulators 8, 9 are coupled to one another by a temperature comparison control 21, 28, 37 via in each case a feed line 10, 11 and a return line 12, 13 in the branch 7 of the heat carrier circuit 3 conducting the heated heat carrier. The temperature comparison control 21, 28, 37 enables the storage and dissipation of cold and hot quantities of heat carrier to the effect that the fluid flow 5 to be heated is uniformly heated and thus is available always at the same temperature level.