Method of operating a multi-pack environmental control system
AssigneeHamilton Sundstrand Corporation
InventorsLouis J Bruno, Thomas M. Zywiak, Diane G. Drew
Life of this patent
Estimating the term…
Abstract
An environmental control system (ECS) pack is provided including a primary heat exchanger, a secondary heat exchanger, and an air cycle machine. The air cycle machine includes a compressor and a turbine. The compressor is fluidly coupled to an outlet of the primary heat exchanger and to an inlet of the secondary heat exchanger. The outlet of the secondary heat exchanger is fluidly coupled to the turbine. A first conduit connects the outlet of the primary heat exchanger and the inlet of the secondary heat exchanger. The first conduit includes a first valve. A second conduit connects the outlet of the secondary heat exchanger to an air load. The second conduit includes a second valve.
Claims14
An environmental control system (ECS) pack, comprising:
- a primary heat exchanger;
- a secondary heat exchanger;
- an air cycle machine including a compressor, and a turbine, the compressor being fluidly coupled to an outlet of the primary heat exchanger and an inlet of the secondary heat exchanger and an outlet of the secondary heat exchanger being fluidly coupled to the turbine;
- a first conduit connecting the outlet of the primary heat exchanger and the inlet of the secondary heat exchanger, the first conduit including a first valve;
- a second conduit connecting the outlet of the secondary heat exchanger directly to an air load, the second conduit including a second valve;
- and
- a third conduit including a third valve, the third conduit and third valve configured to allow for flow from an outlet of the primary heat exchanger directly to the air load, bypassing the air cycle machine.
An aircraft comprising:
- a plurality of engines;
- at least two environmental control system (ECS) packs, each ECS pack being configurable to operate in at least two operating modes and including:
- a primary heat exchanger;
- a secondary heat exchanger;
- an air cycle machine including a compressor, and a turbine, the compressor being fluidly coupled to an outlet of the primary heat exchanger and an inlet of the secondary heat exchanger, and an outlet of the secondary heat exchanger being fluidly coupled to the turbine;
- a first conduit connecting the outlet of the primary heat exchanger and the inlet of the secondary heat exchanger, the first conduit including a first valve;
- a second conduit connecting the outlet of the secondary heat exchanger directly to an air load, the second conduit including a second valve;
- a third conduit including a third valve, the third conduit and third valve configured to allow for flow from an outlet of the primary heat exchanger directly to the air load, bypassing the air cycle machine;
- and
- a controller configured to command the at least two environmental control system packs to operate in one of the at least two operating modes.
Dependencies are inferred from the claim text.