TRANS-CRITICAL VAPOR CYCLE SYSTEM WITH IMPROVED HEAT REJECTION

摘要

A cooling system for an aircraft includes an air intake, an expansion device, and an evaporator. A first heat exchanger receives air passing into the air intake when the aircraft is operating at elevation, and receives the refrigerant from a first compressor at a first pressure. A second compressor receives the refrigerant from the first heat exchanger and compresses the refrigerant to a second pressure that is greater than the first pressure. A second heat exchanger receives the refrigerant from the second compressor. The first and second compressors are configured the first and second compressors are configured to operate at pressures that avoid temperature differences between the refrigerant and the air within each of the first and second heat exchangers below a set restriction.

主权项

1. A cooling system for an aircraft, comprising:
an air intake; an expansion device; an evaporator positioned within the aircraft and configured to receive heated air from a compartment within the aircraft and heat a refrigerant; a first heat exchanger configured to receive air passing into the air intake when the aircraft is operating at elevation, and configured to receive the refrigerant from a first compressor at a first pressure; a second compressor configured to receive the refrigerant from the first heat exchanger and compress the refrigerant to a second pressure that is greater than the first pressure; and a second heat exchanger configured to receive the refrigerant from the second compressor; wherein the first and second compressors are configured to operate at pressures that avoid temperature differences between the refrigerant and the air within each of the first and second heat exchangers below a set restriction.