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    • 9. 发明公开
    • ENVIRONMENTAL CONTROL SYSTEM UTILIZING TWO AIR CYCLE MACHINES
    • 冷却系统,两个空气循环发动机
    • EP1305210A1
    • 2003-05-02
    • EP01959279.9
    • 2001-07-27
    • Hamilton Sundstrand Corporation
    • HIPSKY, Harold
    • B64C13/06F25B9/00
    • B64D13/06B64D2013/0662F05B2220/50F25B9/004Y02T50/56
    • An environmental control system and method are provided for conditioning water-vapor compressed air for supply as conditioned air. The environmental control system (8) includes two air cycle machines (9, 10) that rotate independent of each other. The air cycle machine (9) includes a turbine (11) that drives a fan (12), and the air cycle machine (10) includes a turbine (15) that drives a compressor 816). The environmental control system (8) further includes a primary heat exchanger (19= upstream of the compressor (16), a secondary heat exchanger (20) downstream of the compressor (16), a reheater (21) downstream of the secondary heat exchanger (20), a condenser (22) downstream of the reheater (21), a water collector (24) downstream of the condenser (22), and three bypass control valves (28, 30, 32). In combination, the turbine (11), reheater (21), condenser (22), and water collector (24) form a dehumidification loop (34) for the environmental control system (8). In one mode of operation, the environmental control system (8) further compresses the compressed air in the compressor (16) and then dehumidifies the further compressed air in the turbine (15) to cool the dehumidified further compressed air and to power the compressor (16) in the absence of rotating engagement between the turbine (15) and the turbine (11).