A Method And System For Managing Compressor Oil In A Carbon Dioxide Based Cooling System

Abstract: The present disclosure discloses a method (300) for regulating operation of a carbon dioxide (CO2) based cooling system (100). The method (300) includes regulating operation of a vapor control valve (18) connected between an intermediate pressure receiver (17) and a compressor unit (10) of the cooling system (100). The method (300) includes regulating operation of the vapor control valve (18) based on determination of oil level in an oil reservoir (13) fluidly coupled to the compressor unit (10). With such configuration, the method (300) recovers oil mixed with the refrigerant without reduction in efficiency/loading conditions of the cooling system (100) and may enhance heat exchanger (15) efficiency of the cooling system (100). Further, such method (300) may eliminate or reduce additional cost required to high capacity equipment required to compensate for mixing of lubricant oil and the refrigerant. Figure 2 is a representative figure.

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