Procedure for the calculation and analysis of the basic transcritical cycle CO2

Abstract

The increasingly strict legislations in the field of ecology have necessitated the search for novel refrigerants that can be alternatives to the existing refrigerants.
 One option is the use of so-called natural refrigerants, including ammonia, СО2, and propane.
 Although there is considerable research interest in the use of СО2 as a refrigerant, the required calculation procedures have not been sufficiently described in literature. In addition to the calculation of cycles and the determination of parameters at the base points, conducting an efficiency analysis to determine the optimal solution is necessary.
 The purpose of this study was to develop a methodology for calculating and analyzing the basic transcritical СО2 cycle of.
 The calculation related to the transcritical cycle is based on the fundamental laws of thermodynamics, and the analysis is based on the entropy-statistical method of thermodynamic analysis.
 The calculation includes the analysis of compression loss with respect to system components.
 A description of the operation of the basic transcritical СО2 cycle having two temperature levels and the procedure for calculating and analyzing losses in the elements of the refrigerating unit operating according to the basic transcritical СО2 cycle are reported herein.
 Using this method, identifying the elements and processes with the maximum losses and taking measures to improve the efficiency of the refrigeration system would be possible.