გადაცივების მუშაობის რეჟიმის ზემოქმედება მაცივარი მანქანის ენერგოეფექტურობაზე

Abstract

Currently, refrigeration machines (HM) with two temperature regimes are widely used in modern supermarkets and hypermarkets. Medium temperature refrigerating machines (ST XM) with a boiling point of -10 ℃ are designed to maintain the air temperature in storage chambers within 0 ÷ -6 ℃. Low-temperature refrigerating machines (NT XM) with a boiling point of -35 ℃ are designed to maintain an air temperature of -18 ÷ -20℃. To carry out these processes, one-stage refrigerators were used, the schematic diagrams of which are shown in the first figure. The article presents an innovative technology which is based on the subcooling of liquid refrigerant NT XM (Fig. 2). The essence of this scheme is that after the condenser, the liquid refrigerant NT XM is subcooled to approximately 0 ÷ -5 ℃. Subcooling is carried out due to the boiling of the ST XM refrigerant. As a result, the refrigerating capacity of the low-temperature circuit increases, but at the same time the heat load on the mediumtemperature circuit increases, which leads to an increase in the energy consumption of the medium-temperature compressor unit. But in the end we get the effect which is a reduction in the total energy consumption of both systems cold supply.