CHARACTERISTICS OF THE HEAT-EXCHANGE APPARATUSES OF THE CASCADE REFRIGERATION MACHINE, OPERATING ON AMMONIA, NON-AZEOTROPIC MIXTURE

摘要

The purpose of this theoretical investigation is comparison heat-exchange apparatuses of the cascade refrigeration machine. Heat-exchange apparatuses - condenser of the high stage and condenser-evaporator are made from bare-pipe (1-st variant of apparatuses) and pipe with transverse ring swirl strips (2-nd variant). Comparison is made at operating conditions of R170 -R290/R600a/R600 and R13 - R717 systems.