Vybor khladagenta dlya kholodil'noy ustanovki na osnove entropiynostatisticheskogo analiza

The paper presents the method of a refrigerant choice for a refrigeration plant using the entropy and statistical thermodynamical analysis that allows determining expenditure of energy to compensate the entropy generation both with respect to all cycle and as well as to separate elements of a refrigeration plant for each studied refrigerant and necessary boiling temperatures. The methodology and the example of calculation in regard to a R22 onestage cycle at -31 оС boiling temperature, at 42 оС condensation and at 27 оС ambient temperature are given. The results of defining specific loss of work through the elements of the plant as well as for a group of other refrigerants used in refrigeration engineering such as R32, R134a, R1234yf, R404A, R407C, R410A, R507, R600a, R717, are presented. Calculations of specific loss of work at throttling for all these refrigerants at different boiling temperatures (from -43 to +12 оС) were carried out; recommendations according to the usability range of singlestage compression depending on refrigerant and boiling temperature as well as according to expander types are given.

выбор хладагента, энтропийностатистический метод термодинамического анализа (ЭСМТА), потери работы на компенсацию производства энтропии, одноступенчатый холодильный цикл, удельные потери работы по элементам холодильной установки