Patent ID: 9656755
Date: 2017-05-23
CPC Classifications: B64D,Y02T

Claim:
1. An air cycle machine (ACM) pack system for an aircraft, the system having an improved low inlet pressure cooling performance, the system comprising: an air cycle machine (ACM) comprising at least one compressor mechanically coupled to at least one turbine in series on an ACM shaft; a primary heat exchanger and a secondary heat exchanger coupled to and in fluid communication with the at least one compressor of the ACM, the at least one compressor receiving outlet air from the primary heat exchanger, and the at least one compressor discharging compressor outlet air to the secondary heat exchanger; and, a bypass air flow assembly coupled in parallel to the ACM, the bypass air flow assembly having a bypass air flow regulating element, the bypass air flow assembly being coupled to the ACM via one of, a mechanical drive element, a parallel turbine valve assembly, or a turbo-compressor assembly, wherein the bypass air flow assembly transfers energy extracted by the bypass air flow assembly to the ACM to aid the air cycle machine (ACM) pack system in cooling performance, the extracted energy transferred via one of, the mechanical drive element, the parallel turbine valve assembly, or the turbo-compressor assembly.