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US 10,850,853 B2Granted
Environmental control system utilizing bleed pressure assist
AssigneeHamilton Sunstrand Corporation
InventorLouis J. Bruno
Life of this patent
Estimating the term…
Abstract
A system is provided. The system includes a first inlet providing a medium from a source, a compressing device in communication with the first inlet, and at least one heat exchanger. The compressing device includes a compressor that receives the medium, a first turbine downstream of the compressor, and a second turbine that receives the medium. An outlet of the at least one heat exchanger is in fluid communication with an inlet of the compressor and an inlet of the first turbine.
Claims9
A system, comprising:
- a first inlet providing a flow of bleed air to the system;
- a compressing device in fluid communication with the first inlet to receive the flow of the bleed air, wherein the compressing device comprises:
- a compressor,
- a first turbine located downstream of the compressor with respect to the flow of the bleed air, and
- a second turbine;
- a valve;
- and
- at least one heat exchanger,
- wherein an outlet of the at least one heat exchanger is in fluid communication with an inlet of the compressor,
- wherein the system operates in at least two modes comprising a low pressure mode and a high pressure mode,
- wherein, in the low pressure mode, the bleed air is mixed with a recirculation air at a first mixing point, the first mixing point being located downstream of the compressor with respect to the flow of the bleed air and upstream from the at least one heat exchanger,
- wherein, in the low pressure mode, the bleed air provided via the first inlet is divided into first and second sub-flows, the first sub-flow bypasses the compressor and is provided directly to the at least one heat exchanger, the second sub-flow is provided directly to the second turbine to maintain a speed of the compressing device, and
- wherein, in the high pressure mode, the bleed air is mixed with the recirculation air at a second mixing point, the second mixing point being located downstream of the first turbine with respect to the flow of the bleed air.
10 more elements
A system, comprising:
- a first inlet providing a flow of bleed air to the system;
- a compressing device in fluid communication with the first inlet to receive the flow of the bleed air, wherein the compressing device comprises:
- a compressor,
- a first turbine s located downstream of the compressor with respect to the flow of the bleed air, and
- a second turbine;
- a valve;
- and
- at least one heat exchanger,
- wherein the at least one heat exchanger comprises a plurality of passes by which the bleed air flows,
- wherein an outlet of a first pass of the plurality of passes is in fluid communication with an inlet of the compressor, and
- wherein an outlet of a final pass of the plurality of passes is in fluid communication with an inlet of the first turbine,
- wherein the system operates in at least two modes comprising a low pressure mode and a high pressure mode,
- wherein, in the low pressure mode, the bleed air is mixed with a recirculation air at a first mixing point, the first mixing point being located downstream of the compressor and the first pass of the plurality of passes and upstream from the final pass of the plurality of passes with respect to the flow of the bleed air, and
- wherein, in the high pressure mode, the bleed air is mixed with the recirculation air at a second mixing point, the second mixing point being located downstream of the first turbine with respect to the flow of the bleed air, and the second turbine receives the bleed air to power the compressor.
11 more elements
Dependencies are inferred from the claim text.