US 12,215,930 B2
Tube-in-tube unified shell heat exchanger
James Fredric Wiedenhoefer, Windsor, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Oct. 6, 2022, as Appl. No. 17/960,857.
Prior Publication US 2024/0118034 A1, Apr. 11, 2024
Int. Cl. F28D 7/12 (2006.01); F28D 7/16 (2006.01); F28D 21/00 (2006.01)
CPC F28D 7/12 (2013.01) [F28D 21/0003 (2013.01); F28D 7/1607 (2013.01); F28D 2021/0026 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A tube-in-tube unified shell element heat exchanger comprising:
an outer tube structure comprising a tube wall defining a first end opposite a second end; the outer tube structure comprises an interior surface and an exterior surface opposite the interior surface; the interior surface includes an augmentation structure; the outer tube structure comprises an end cap connected to the second end of the tube wall; the outer tube structure comprises a top section proximate the first end; the top section includes a flange and a flow outlet; the tube wall of the outer tube structure connects with the top section proximate the flange to form an integral outer tube structure;
an inner tube structure including a tubular shaped inner body defining an internal flow area, the inner tube structure including surface features formed on the exterior of the inner tube structure; the inner tube structure including a top ring connected to the exterior proximate an inlet port of the inner tube structure; inner tube structure includes an outlet port opposite the inlet port; wherein the top ring of the inner tube structure is connected with the top section of the outer tube structure; and
a gap formed between the outer tube structure and the inner tube structure, the gap fluidly coupled between the inlet port and the flow outlet.