THE PERFECTION OF REFRIGARATION MACHINE WITH REFRIGERANT RECHARGING OF COMPRESSOR’S CYLINDER. II. THE PRODUCTION OF COLD AT TWO LEVELS OF TEMPERATURE

Abstract

The refrigeration machines with the various circuits and designs are used for production of cold
at two levels of temperature. Such machines often are created on the basis of only one compressor.
In this case a loss from irreversibility in a cycle of the refrigeration machine there is, sometimes
rather significant, rides that all cold is made at the bottom temperature level. The presence of two
pressure of suction in a cycle of the refrigerating machine (in Vorhis's cycle), working with
refrigerant recharging by cylinder of the compressor, allows to remove this loss. The description
of the schemes of two-temperature machines of such type is resulted in article. Is shown that at
exchange from a usual cycle to the explored cycle of production of a two-temperature cold at
levels -20°C and +5°C it is possible to increase the exergy efficiency on 35%for a coolant R12 and
on 45 % for a coolant R600a.