TY - JOUR AU - Bondar, V.P. PY - 2017/03/20 Y2 - 2024/03/29 TI - CONDITIONS OF MINIMAL LOSS OF EXERGY IN NON-EQUILIBRIUM PROCESSES OF ACTUATING MEDIUMS HEAT EXCHANGE JF - Energy Technologies & Resource Saving JA - Energ. Tech. & Res. Sav. VL - 0 IS - 2 SE - Thermophysical basics of energy processes DO - 10.33070/etars.2.2017.04 UR - https://etars-journal.org/index.php/journal/article/view/66 SP - 30-34 AB - Heat exchange of actuating mediums in heat-exchanging apparatuses runs non-equilibrium (irreversibly), causing loss of operational part of heat. Two types of non-equilibrium process are distinguished: external and internal. External irreversibility is function of average temperature difference (irreversibility degree) and relation of incomplete recuperation on heat exchange boards of actuating mediums. Nature of internal non-equilibrium processes is related to friction work of actuating mediums that are practically impossible to be taken into account and described analytically. In this article, in order to define conditions of change of current temperature difference by exponential law, external and internal irreversibility are reviewed both mutual and separately. Change of current temperature difference by exponent is one of conditions of minimal numeric value of entropy production of system in non-equilibrium processes of actuating mediums heat exchange existence. Analysis, performed in article, along with example, are evidence that at all types of irreversible processes of actuating mediums heat-exchange, exist conditions of gaining the numeric value of minimum entropy production and exergy losses. Bibl. 8, Fig. 1. ER -