Co2 refrigeration system for ice-playing surface

Abstract

A CO2 refrigeration system comprising a transfer circuit for heat exchange between a supracompression circuit of CO2 refrigerant, and an evaporation circuit of CO2 refrigerant. A transfer circuit absorbs heat from the evaporation circuit, and releases heat to the supracompression circuit. The supracompression circuit comprises a compression stage in which CO2 refrigerant is compressed, a cooling stage in which the CO2 refrigerant from the compression stage releases heat, and a pressure-regulating unit in a line between the cooling stage and the evaporation heat exchanger to maintain a pressure differential therebetween. The evaporation circuit receives CO2 refrigerant having released heat in the condensation heat exchanger. The evaporation circuit comprises a condensation reservoir in which CO2 refrigerant is accumulated in a liquid state, and an evaporation stage in which the CO2 refrigerant from the condensation reservoir absorbs heat to cool an ice-playing surface.

1 .- 9 . (canceled) 
     
     
         10 . A refrigeration system comprising:
 a compression stage in which refrigerant is compressed to a higher pressure state;   a condensation stage in which the refrigerant in the higher pressure state releases heat;   a pressure-regulating downstream of the condensation stage to lower a pressure of the refrigerant having released heat; and   an evaporation stage in which the refrigerant absorbs heat to cool a fluid;   wherein the condensation stage comprises geothermal gas cooling.   
     
     
         11 . The refrigeration system according to  claim 10 , wherein the evaporation stage comprises a heat exchanger in which the refrigerant absorbs heat from another refrigerant. 
     
     
         12 . The refrigeration system according to  claim 10 , wherein the condensation stage comprises a heat reclaim exchanger by which heat is reclaimed by another refrigerant for heating purposes. 
     
     
         13 . The refrigeration system according to  claim 10 , wherein the pressure regulating unit is at least one valve. 
     
     
         14 . The refrigeration system according to  claim 13 , wherein the valve is an expansion valve.