METHOD TO CONTROL PRESSURE OF TRANSCRIPT OF REFRIGERATING UNIT ON CARBON DIOXIDE GAS Russian patent published in 2020 - IPC F25B49/02 

FIELD: cooling or freezing equipment.

SUBSTANCE: invention relates to refrigeration engineering, primarily to methods of adjusting pressure of transcritical cycle of refrigerating plant on carbon dioxide gas for ships with unlimited navigation area, when temperature of cooling water reaches 36 °C, and ambient temperature of 60 °C. In operation of the plant and changes in heat load, the pressure of the gas cooler and the evaporator (equilibrium boiling point) is kept constant by means of regulators, suction pressure is controlled with positive feedback by compressor capacity; overheating after evaporator supports expansion device controlled by controller. When the plant is stopped, the expansion device is switched off, the pressure of the evaporator is reduced to 6 bar, the electric valve of the pipeline is connected pneumatically connecting the discharge line to the carbon dioxide gas capacity, after termination of pressure drop in the line and gas cooler, the valve and the compressor are switched off and the adjustment of the evaporator pressure regulator is restored.

EFFECT: technical result is method simplification.

5 cl, 1 dwg