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US 6,681,592 B1Granted
Electrically driven aircraft cabin ventilation and environmental control system
AssigneeHamilton Sundstrand Corporation
InventorsCharles E. Lents, Steven E. Squier, Wayne A. Thresher
Life of this patent
Estimating the term…
Abstract
The present invention relates to an electrically driven aircraft cabin and ventilation and environmental control system. The system includes at least one inlet for capturing ram air, an electrically driven compressor for pressurizing the ram air, and a thermal conditioning subsystem for thermally conditioning the pressurized ram air. The system further includes a subsystem for removing undesirable moisture from the thermally conditioned ram air.
Claims8
An electrically driven aircraft cabin ventilation and environmental control system comprising:
- means for capturing ram air;
- means for creating a first flow of said ram air and a second flow of said ram air;
- electrically driven means for receiving said first flow of ram air and for creating a pressurized ram air flow;
- first means for cooling said pressurized ram air flow, said first cooling means receiving said second ram air flow and using said second ram air flow as a heat sink;
- second means for receiving said cooled pressurized ram air from said first cooling means and for cooling and removing moisture from said cooled pressurized ram air;
- expansion means for receiving said cooled ram air from said second means and for expanding said cooled ram air;
- means for delivering said cooled pressurized air from said expansion means to said cabin;
- said delivering means comprises a mix manifold for receiving an exit air stream from said expansion means and for delivering air to said cabin;
- said mix manifold receives at least one of recirculated air from said cabin, a portion of said pressurized ram air prior to said compressed air entering said first cooling means, and hot gas bypass air from an engine;
- a recovery heat exchanger for receiving said air exiting said, electrically driven means;
- means for delivering cabin exhaust air to said recovery heat exchanger to act as a heat sink;
- and
- said electrically driven means, an electric motor for driving said electrically driven means, and a power turbine mounted on a common shaft and said cabin exhaust air delivered to said recovery heat exchanger further being used to drive said power turbine.
10 more elements
An electrically driven aircraft cabin ventilation and environmental control system comprising:
- means for capturing ram air;
- means for creating a first flow of said ram air and a second flow of said ram air;
- electrically driven means for receiving said first flow of ram air and for creating a pressurized ram air flow;
- first means for cooling said pressurized ram air flow, said first cooling means receiving said second ram air flow and using said second ram air flow as a heat sink;
- second means for receiving said cooled pressurized ram air from said first cooling means and for cooling and removing moisture from said cooled pressurized ram air;
- expansion means for receiving said cooled ram air from said second means and for expanding said cooled ram air;
- means for delivering said cooled pressurized air from said expansion means to said cabin;
- and
- means for mixing hot bypass air from another ECS pack with air exiting said expansion means prior to said air being delivered to said second cooling means.
6 more elements
A method for delivering conditioned air to an aircraft cabin comprising the steps of:
- capturing ram air;
- creating a first flow of ram air and a second flow of ram air from said captured ram air;
- delivering said first flow of ram air to an electrically driven compressor and pressurizing said ram air in said compressor;
- providing first means for cooling said pressurized ram air;
- delivering said second ram air flow to said first cooling means and using said second ram air flow as a heat sink;
- providing second means for cooling said ram air and for removing moisture from said ram air;
- delivering said cooled ram air from said first cooling means to said second cooling means;
- providing expansion means and delivering said cooled ram air from said second cooling and moisture removing means to an inlet of said expansion means;
- delivering said cooled pressurized air from an outlet of said expansion means to said cabin;
- said second cooling and moisture removing means providing step comprising providing a reheater heat exchanger and a condenser;
- said step of delivering said cooled ram air from said first cooling means comprising cooling said ram air by passing said ram air through said reheater heat exchanger and said condenser;
- warming said air exiting said condenser by passing said air through said reheater heat exchanger;
- said expansion means comprising a cooling turbine;
- introducing said warmed air exiting said reheater heat exchanger into an inlet of said cooling turbine;
- expanding said air introduced into said cooling turbine inlet;
- said delivering step comprising introducing said expanded air exiting said cooling turbine into said condenser and delivering said expanded air in a cooled condition to a cabin air distribution system mix manifold;
- and
- mixing hot gas bypass air from an engine with said expanded air prior to introducing said expanded air into said condenser.
15 more elements
Dependencies are inferred from the claim text.