Heat exchange – Flow passages for two confined fluids – Interdigitated plural first and plural second fluid passages
Patent
1977-03-29
1981-02-03
Davis, Albert W.
Heat exchange
Flow passages for two confined fluids
Interdigitated plural first and plural second fluid passages
165 10, 65 4A, 65 33, F28F 300, F28F 702
Patent
active
042482976
ABSTRACT:
Disclosed is an assembly or matrix comprising an arrangement of integrally fused tubes forming a series of nonporous, longitudinal parallel passageways therethrough. The matrix is of a low-expansion ceramic material and the passageways therethrough have thin walls; a high proportion of the cross-sectional or frontal area of the matrix is free open area. Also disclosed are methods for making such a matrix from glass tubes that are thermally crystallizable; one method involves longitudinally bundling the tubes with their ends sealed and heating the assembly to soften, expand and fuse the tubes in a heat treatment schedule that also nucleates and thermally crystallizes the matrix to the final ceramic product. Another embodiment involves superimposing a plurality of layers of tubes, one layer above the other in successive parallel planes, with the tubes in each plane being essentially parallel to each other and transverse to the tubes in adjacent layers. The matrix of tubes, each with its ends sealed, is heated to soften, expand and fuse the tubes. The sealed ends are opened and a plurality of such matrices are assembled into an annular structure, each matrix being separated from adjacent matrices by a wedge-shaped member.
REFERENCES:
patent: 2821369 (1958-01-01), Hilliard
patent: 2887303 (1959-05-01), Reys
patent: 3112184 (1963-11-01), Hollenbach
patent: 3269817 (1966-08-01), Bondley
patent: 3279931 (1966-10-01), Olcott
Click Myron E.
Davis Albert W.
Lynch Charles S.
Owens--Illinois, Inc.
Wilson David H.
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