Entropiynostatisticheskiy analiz kaskadnykh kholodil'nykh sistem s CO2

In connection with imposing a ban on high GWP refrigerants use the interest is growing to the use of natural refrigerants, in particular carbon dioxide, in refrigerating plants. There are several circuits of CO2 refrigerating plants. The paper examines a cascade refrigerating plant with CO2 in the lowstage part and with R134а in the upperstage part. A basic circuit and refrigerating cycle are cited. A cascade cycle was analyzed for adopted initial conditions that provide the supply of needed cold to consumers of lowand average temperatures using the entropy and statistical method of analysis (ESMA). A sequencing of calculation is given as well as the formulae and results of calculation of all necessary values to specify energy losses through components of the cascade system. The data are compared with the losses through components of other СО2 and R404А systems. The power efficiency of all systems was compared as well, and the comparison proved the advantage of the R744/R134а cascade system.

каскадная холодильная система с СО2 в нижнем каскаде, энтропийностатистический метод анализа, энергоэффективность холодильной системы