ENVIRONMENTAL CONTROL SYSTEM WITH AIR CYCLE MACHINE BYPASS SHUTOFF VALVES

摘要

An environmental control system (10) includes an air cycle machine. The air cycle machine includes a compressor section (26) with a compressor inlet (26A) and a compressor outlet (26B), and a first turbine section (28) with a first turbine inlet (28A) and a first turbine outlet (28B). The environmental control system (10) further includes a first turbine bypass shutoff valve (50) positioned at the first turbine inlet (28A). The first turbine bypass shutoff valve (50) is configured to shut off the flow of air to the first turbine inlet (28A).