Anti-icing heat exchanger for aircraft air cycle performance enh

Details Anti-icing heat exchanger for aircraft air cycle performance enh Anti-icing heat exchanger for aircraft air cycle performance enh

1995-01-11

1996-09-10

Ford, John K.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62172, 62402, 62513, 62434, F25D 900

Patent

active

055534619

ABSTRACT:
Unconditioned, sub-freezing turbine exhaust air is employed to cool liquid coolant from radar electronics in an aircraft. This is accomplished by utilizing a liquid/air exchanger. However, in order to ensure that the air-cooled heat exchangers do not experience freezing of moisture droplets, sufficient heat is supplied to a liquid/air heat exchanger, located at the turbine exhaust, to maintain all surfaces (fins) above freezing, and also to heat the entire turbine exhaust air stream to a temperature above freezing as it exits that heat exchanger. Use of this anti-icing liquid/air heat exchanger, in conjunction with the proper air and liquid flow controls, will permit savings of total cooling air (i.e., engine bleed air) flow by negating the need for a hot air bypass to reheat turbine exhaust air.

REFERENCES:
patent: 3428242 (1969-02-01), Rannenberg
patent: 4430867 (1984-02-01), Warner
patent: 4535606 (1985-08-01), Rannenberg
patent: 4553407 (1985-11-01), Rannenberg
patent: 5137079 (1992-08-01), Anderson

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