Darrel D Hornbaker

US Patent:

20170137132, May 18, 2017

Filed:

Nov 16, 2015

Appl. No.:

14/942946

Inventors:

- Wichta KS, US
DARREL DUANE HORNBAKER - WICHITA KS, US

International Classification:

B64D 13/06

Abstract:

An Environmental Control System (ECS) for aircraft is provided. The ECS includes a heat exchanger (HX) and an air conditioning unit (ACU) upstream of the heat exchanger. The heat exchanger receives flows of hot air bled from a plurality of aircraft engines and flows of cold ambient air drawn from the aircraft exterior for use by the heat exchanger and ACU for heating and cooling the interior cabin of the aircraft. The ECS may operate in one of several modes, whether the heat exchanger and air conditioning unit are operating normally or have failed. In a normal mode, the ACU and heat exchanger operate in series. In an “ACU only” mode, the ACU operates without the heat exchanger. In an “HX only” mode, the heat exchanger operates without the ACU. In an “ECS off” mode, both the heat exchanger and ACU are bypassed.