Combined environmental control and power system for aircraft

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Article publication date: 1 April 2001

110

Keywords

Citation

(2001), "Combined environmental control and power system for aircraft", Aircraft Engineering and Aerospace Technology, Vol. 73 No. 2. https://doi.org/10.1108/aeat.2001.12773bad.002

Publisher

:

Emerald Group Publishing Limited

Copyright © 2001, MCB UP Limited


Combined environmental control and power system for aircraft

Combined environmental control and power system for aircraft

Keywords British Aerospace, Power devices, Patents

In GB Patent 2340890 British Aerospace PLC describes a combined environmental control and power system for an aircraft. Bleed air from the engine is cooled by a heat exchanger and supplied to an expansion turbine where it expands to generate mechanical power and cools to a temperature appropriate for cooling the cockpit and/or avionics equipment. The power generated by the turbine is supplied to the aircraft gearbox where it is combined with that obtained from a power take off which takes mechanical power directly from the engine and is then available to drive various pumps and generators. The turbine air outlet temperature is controlled by a variable ram air inlet to the heat exchanger. Fuel may be used to cool hydraulic fluid and a lubricant heat exchanger. Boiling of fuel is prevented by first being passed through ram air coolers. The intercooler and compressor of a conventional cold air unit are not required.

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