초록 ▼

A vapor compression refrigeration system, such as a water chiller, uses a centrifugal compressor with magnetic bearings and a refrigerant, specifically HFC-227ea and HFC-227ca, to minimize enthalpy rise across the compressor and/or provide compression in a single stage for low cooling capacity. Magn

A vapor compression refrigeration system, such as a water chiller, uses a centrifugal compressor with magnetic bearings and a refrigerant, specifically HFC-227ea and HFC-227ca, to minimize enthalpy rise across the compressor and/or provide compression in a single stage for low cooling capacity. Magnetic bearings eliminate the problem caused by lubricated bearings to support rotating structure during normal compressor operation. The centrifugal compressor can be configured with a pre-defined static surge line.

대표청구항 ▼

[ What is claimed is:] [4.] A vapor compression refrigeration system, comprising a condenser, an evaporator, an expansion device between an outlet of the condenser and an inlet of the evaporator, a centrifugal compressor supported by magnetic bearings arranged between an outlet of the evaporator and

[ What is claimed is:] [4.] A vapor compression refrigeration system, comprising a condenser, an evaporator, an expansion device between an outlet of the condenser and an inlet of the evaporator, a centrifugal compressor supported by magnetic bearings arranged between an outlet of the evaporator and an inlet of the condenser, and a refrigerant selected from a group of refrigerants to reduce specific enthalpy rise of the refrigerant passing through the centrifugal compressor.