Patent ID: 8915095

Claim:
An environmental conditioning system, comprising: a compressor for compressing air in an air flow path; a turbine for driving said compressor and providing air flow to a passenger compartment, said turbine coupled to said compressor; a first evaporator in communication with air from said compressor, said first evaporator configured to cool air from said compressor; a heat exchanger disposed in said air flow path between said compressor and said first evaporator, said heat exchanger configured to cool air from said compressor; a second evaporator downstream of said first evaporator, wherein said second evaporator is configured to cool air from the passenger compartment, wherein said first and second evaporators are in fluid communication and in series within a refrigerant flow path of a refrigerant system; a first control valve controlling refrigerant flow to the first evaporator; a second control valve controlling refrigerant flow to the second evaporator; and a controller controlling the first control valve and the second control valve for balancing the refrigerant flow to each of the first evaporator and the second evaporator for controlling a combination of air flow from the turbine and recirculated air flow from the passenger compartment.