Dual heat exchanger fuel tank inerting system

摘要

A fuel tank inerting system includes a bleed air inlet, a bleed air conditioning system, an air separation module, a nitrogen-enriched air conditioning system, a nitrogen-enriched air outlet, and a controller. The bleed air conditioning system is connected to the bleed air inlet and is configured to cool bleed air. The air separation module is connected to the bleed air conditioning system and is configured to produce nitrogen-enriched air. The nitrogen-enriched air conditioning system is connected to the air separation module and is configured to cool nitrogen-enriched air. The controller controls nitrogen-enriched air temperature and nitrogen-enriched air flow rate at the nitrogen-enriched air outlet.

主权项

1. A fuel tank inerting system comprising:
a ram air duct having a bleed air inlet; a bleed air conditioning system connecting the bleed air inlet and an air separation module, the bleed air conditioning system comprising a primary heat exchanger positioned in the ram air duct; a nitrogen-enriched air conditioning system connecting the air separation module and a nitrogen-enriched air outlet, the nitrogen-enriched air conditioning system comprising a secondary heat exchanger positioned in the ram air duct, wherein the secondary heat exchanger is configured to receive nitrogen-enriched air from the air separation module and configured to provide cooled bleed air, and wherein the nitrogen-enriched air conditioning system further comprises a diverter valve configured to receive nitrogen-enriched air from the air separation module and configured to direct nitrogen-enriched air to the secondary heat exchanger, to a nitrogen-enriched air outlet, or to both; and a controller configured to control nitrogen-enriched air temperature and nitrogen-enriched air flow rate at the nitrogen-enriched air outlet.