| 摘要 |
A CO2 refrigeration system for an ice-playing surface comprises a transfer circuit, a CO2 refrigerant circuit and an independent condensation circuit. A transfer refrigerant circulates in the transfer circuit between a condensation heat exchanger and an evaporation heat exchanger. The CO2 circuit is in heat-exchange relation with the condensation heat exchanger to release heat from the CO2 refrigerant. The CO2 circuit comprises a condensation reservoir to accumulate the CO2 refrigerant, and an evaporation stage to receive the CO2 refrigerant from the condensation reservoir to absorb heat from the ice-playing surface. The independent circuit is in heat-exchange relation with the refrigerant of the transfer circuit at the evaporation heat exchanger. The independent circuit comprises a compression stage with a magnetically operated compressor to compress a secondary refrigerant, a condensation stage in which the secondary refrigerant releases heat, and an evaporation stage in which the secondary refrigerant is in heat-exchange relation with the transfer refrigerant at the evaporation heat exchanger to absorb heat.
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