Heat exchanger
AssigneeHamilton Sundstrand Corporation
InventorsWallace T. Nietupski, Steven D. Army, Kurt L. Stephens, Michael Doe, Jr.
Life of this patent
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Abstract
A heat exchanger assembly for an inert gas system includes a ram air inlet flange, a ram air outlet flange, and a core coupled to the ram air inlet flange and the ram air outlet flange. The core includes a fin assembly having a plurality of hot layers and ram air layers. The hot layers have an effective hot flow length, the ram air layers have an effective cold flow length, and the fin assembly has a no flow length. A ratio of the effective hot flow length to the effective cold flow length is between 9.23 and 10.32. A ratio of the no flow length to the cold flow length is between 21.86 and 25.23.
Claims20
A heat exchanger assembly for an inert gas system, the heat exchanger assembly comprising:
- a ram air inlet flange;
- a ram air outlet flange;
- and
- a core coupled to the ram air inlet flange and the ram air outlet flange, the core comprising a fin assembly of a plurality of hot layers and ram air layers, the hot layers having an effective hot flow length, the ram air layers having an effective cold flow length, and the fin assembly having a no flow length, wherein a ratio of the effective hot flow length to the effective cold flow length is between 9.23 and 10.32 and a ratio of the no flow length to the cold flow length is between 21.86 and 25.23.
A heat exchanger core for a heat exchanger assembly of an inert gas system, the heat exchanger core comprising:
- a fin assembly comprising a plurality of hot layers and ram air layers, the hot layers having an effective hot flow length, the ram air layers having an effective cold flow length, and the fin assembly having a no flow length, wherein a ratio of the effective hot flow length to the effective cold flow length is between 9.23 and 10.32 and a ratio of the no flow length to the cold flow length is between 21.86 and 25.23.
A method of installing a heat exchanger assembly for an inert gas system in a ram air cooling system comprising:
- coupling a ram air inlet flange of the heat exchanger assembly to an environmental control system heat exchanger pack of the ram air cooling system;
- coupling a ram air outlet flange of the heat exchanger assembly to a ram outlet header of the ram air cooling system;
- coupling a hot inlet of the heat exchanger assembly to an inlet conduit configured to provide engine bleed air;
- coupling a hot outlet of the heat exchanger assembly to an outlet conduit configured to provide a cooled flow from the engine bleed air to an air separation module of the inert gas system;
- and
- wherein cooling of the engine bleed air is provided by a core of the heat exchanger assembly comprising a fin assembly of a plurality of hot layers and ram air layers, the hot layers having an effective hot flow length, the ram air layers having an effective cold flow length, and the fin assembly having a no flow length, wherein a ratio of the effective hot flow length to the effective cold flow length is between 9.23 and 10.32 and a ratio of the no flow length to the cold flow length is between 21.86 and 25.23.
Dependencies are inferred from the claim text.