US 12,168,518 B2
Hybrid ECS architecture to reduce engine bleed dependency for aircraft cabin pressure and temperature control
John John Kocherry, Kerala (IN); Santosh Kumar Tripathy, Karnataka (IN); and Tony Ho, Glastonbury, CT (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Nov. 5, 2019, as Appl. No. 16/674,839.
Claims priority of application No. 201911035927 (IN), filed on Sep. 6, 2019.
Prior Publication US 2021/0070453 A1, Mar. 11, 2021
Int. Cl. B64D 13/06 (2006.01); B64D 33/02 (2006.01); F25B 9/00 (2006.01)
CPC B64D 13/06 (2013.01) [B64D 33/02 (2013.01); F25B 9/004 (2013.01); B64D 2013/0611 (2013.01); B64D 2013/0618 (2013.01); B64D 2013/064 (2013.01); B64D 2013/0644 (2013.01); B64D 2033/0266 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An environmental control system, comprising:
an ambient air conduit and a bleed air conduit;
an electric compressor connected to the ambient air conduit;
a mechanical compressor connected to an outlet of the electric compressor and to the ambient air conduit, the electric compressor supported for rotation independent of the mechanical compressor;
a turbine operatively connected to the mechanical compressor, the turbine connected to both the ambient air conduit and the bleed air conduit to provide conditioned air to a conditioned air conduit;
a primary heat exchanger connecting the bleed air conduit to the turbine;
a secondary heat exchanger connecting the mechanical compressor to the conditioned air conduit; and
a heat exchanger interconnect valve operable to fluidly couple an outlet of the secondary heat exchanger directly to an inlet of the primary heat exchanger, the secondary heat exchanger being arranged upstream from and in series with the primary heat exchanger relative to an ambient air flow.