Air conditioning system

An air conditioning system comprising:

• an evaporator;
• a compressor fluidly connected to the evaporator to compress low-pressure refrigerant exiting the evaporator to high-pressure refrigerant;
• a condenser fluidly connected to the compressor to receive the high pressure refrigerant and dissipate heat therefrom;
• a valve configured to control flow of high pressure refrigerant exiting the condenser;
• an energy recovery device having an inlet fluidly connected to the valve to receive high pressure refrigerant, an outlet fluidly connected to the evaporator to deliver low pressure refrigerant thereto, the energy recovery device being configured to extract work from flow of refrigerant therethrough;
• a bypass passage downstream from the inlet and upstream from the outlet of the energy recovery device, the bypass passage being configured to deliver an auxiliary flow of refrigerant to the energy recovery device to reduce suction power loss;
• and
• a high-pressure line configured to deliver high-pressure refrigerant from the compressor to the valve and a bypass line configured to deliver high-pressure refrigerant from the high-pressure line to the bypass passage.

An air conditioning system comprising:

• an evaporator;
• a compressor fluidly connected to the evaporator to compress low-pressure refrigerant exiting the evaporator to high-pressure refrigerant;
• a condenser fluidly connected to the compressor to receive the high pressure refrigerant and dissipate heat therefrom;
• a valve configured to control flow of high pressure refrigerant exiting the condenser;
• an energy recovery device having an inlet fluidly connected to the valve to receive high pressure refrigerant, an outlet fluidly connected to the evaporator to deliver low pressure refrigerant thereto, the energy recovery device being configured to extract work from flow of refrigerant therethrough;
• a bypass passage downstream from the inlet and upstream from the outlet of the energy recovery device, the bypass passage being configured to deliver an auxiliary flow of refrigerant to the energy recovery device to reduce suction power loss;
• and
• a low pressure line configured to deliver low pressure refrigerant from the energy recovery device to the evaporator and a bypass line configured to deliver low pressure refrigerant from the low pressure line downstream from the energy recovery device to the bypass passage.