THE PERFECTION OF REFRIGARATION MACHINE WITH REFRIGERANT RECHARGING OF COMPRESSOR’S CYLINDER. 1. THE PRODUCTION OF COLD AT ONE LEVEL OF TEMPERATURE

Abstract

The conversion of the various equipment of refrigerating technics at the ozone-nondestruction refrigerants is proceeding now a days. From all variety of offered working bodies the big interest is shown to such natural refrigerant as isobutane (R600а). However the given refrigerant in the case of production low-temperature colds boils at vacuum in the evaporator. It results to the decrease of cold-productivity of refrigerating machine. To increase of efficiency of the real one-temperature cycle of cooling it is offered to use the compressor which working with refrigerant recharging of volume of compression. The effective constructive decisions which should be realized at use of the standard compressor in such cycle are considered in given article. The theory of a cycle with recharging (Vorhis’s cycle) is stated, the plain thermodynamic treatment of the basic operating modes of the refrigerating machine such type and existence of optimal pressure of recharging is given. Comparative researches of refrigerating Vorhis’s machine on the refrigerants R12 and R600a have confirmed an opportunity of increase in its efficiency from 11–13 % (for R12) and up to 19–22 % (for R600а).