Power plants – Combustion products used as motive fluid
Reexamination Certificate
2000-08-22
2001-09-18
Freay, Charles G. (Department: 3746)
Power plants
Combustion products used as motive fluid
C060S039010, C060S039183, C244S058000, C244S118500, C454S071000
Reexamination Certificate
active
06289665
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The field of the invention is aircraft air conditioning exhaust energy recovery.
2. Description of the Prior Art
At present, aircraft air conditioning exhaust is expelled through air-flow outlet valves without taking advantage of the potential energy contained in the pressure difference of the interior of the cabin in relation to the exterior of the aircraft caused by the flow of air required for its renewal.
BRIEF DESCRIPTION OF THE INVENTION
The aircraft air conditioning energy recovery device captures the potential energy held in the pressurized cabin of an airplane flying at altitude. The pressurized cabin contains potential energy relative to the unpressurized exterior. As air exits the pressurized cabin, potential energy is converted into kinetic energy as the gas flows out. This kinetic energy can be harnessed and converted to more usable forms such as electrical energy.
The invention involves the placement of a turbine of an air pump and the aircraft outflow valve in a duct through which the air flows. The turbine shaft attached to an electric generator, a hydraulic pump, or accessory gearbox inside the engine, the turbine receives the aircraft air conditioning exhaust from the pressure cabin.
The aircraft air conditioning exhaust can be also sent through a duct to strike inclined tips of the fan blades and first stage of the low speed compressor blades of the turbine engine.
In all these cases, the engine efficiency is increased by adding the potential energy from the pressurized cabin to the system.
REFERENCES:
patent: 2391838 (1945-12-01), Kleinhans et al.
patent: 2734356 (1956-02-01), Kleinhans
patent: 2777301 (1957-01-01), Kuhn
patent: 4261416 (1981-04-01), Hamamoto
patent: 5137230 (1992-08-01), Coffinberry
patent: 5442905 (1995-08-01), Claeys et al.
patent: 5482229 (1996-01-01), Asshauer
Freay Charles G.
Schwartz Robert M.
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