Procedure for calculation and analysis of transcritical cycle CO₂ with parallel compression and ejector

Abstract

Attempts to reduce the negative impact on the environment have led, among other things, to the use of so-called natural refrigerants. One of which is SO₂.

At food processing enterprises, this refrigerant is used in two main cycles - cascade and transcritical.

Along with the negative impact on the environment, it is also necessary to take into account the increase in the efficiency of refrigeration plants, which is especially important for transcritical cycles.

The purpose of the study was to develop a method for calculating and analyzing the transcritical cycle of SO₂ with parallel compression and an ejector.

The calculation of the transcritical cycle is based on the fundamental laws of thermodynamics, the analysis method is based on the entropy-statistical method of thermodynamic analysis. Cycle calculation includes analysis of compression loss by system components.

Description of operation of transcritical cycle of SO₂ with parallel compression and ejector with two temperature levels is given, procedure of calculation and analysis of losses in elements of refrigerating unit operating according to transcritical cycle of SO₂ with parallel compression and ejector is given.

The use of this method allows you to identify the elements and processes with the greatest losses and take further measures to improve the efficiency of the refrigeration system.

Keywords

transcritical cycle / CO₂ / entropy-statistical method of thermodynamic analysis / parallel compression / ejector

References

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