Heat exchanger tube and method for making
AssigneeHexcel Corporation
InventorsThomas K. Owen, James R. Watts, Milton F. Custer, Kevin D. McVicker
Life of this patent
Estimating the term…
Abstract
A heat exchanger tube (2, 2a, 2b) is made using a hollow, impermeable, monolithic ceramic inner tube (4) and wrapping the inner tube with a circumferentially extending reinforcing material (12) impregnated with a slurry of ceramic particles, particle carrier medium and thermoset binder. The combination of the inner tube and the impregnated reinforcing material is first heated to solidify the thermoset binder. The combination is then sintered to drive off the particle carrier medium and themoset binder to create a two-layer heat exchanger tube including the inner tube and an outer tube (6).
Claims9
A heat exchanger tube comprising:
- a hollow ceramic first tube having a longitudinal axis, an inner surface and an outer surface;
- and
- at least one circumferentially extending, fibrous ceramic-impregnated reinforcement layer of a chosen thickness said reinforcement lying opposite of the first tube, the first tube having a thickness substantially equal to or greater than a thickness of the reinforcement layer and extending in the longitudinal direction along a substantial portion of the reinforcement layer.
A heat exchanger tube comprising:
- a hollow ceramic inner tube having a longitudinal axis, an inner surface and an outer surface;
- and
- at least one circumferentially extending fiber ceramic-impregnated reinforcement layer of a chosen thickness, said reinforcement layer comprising a substantially continuous sheet of fabric wrapped circumferentially around the outer surface of the first tube, the first tube having a thickness substantially equal to or greater than a thickness of the reinforcement layer.
A heat exchanger tube comprising:
- a hollow ceramic first tube having a longitudinal axis, an inner surface and an outer surface;
- and
- at least one circumferentially extending, fibrous ceramic-impregnated reinforcement layer of a chosen thickness, said reinforcement lying opposite the outer surface of the first tube, the first tube extending in the longitudinal direction along a substantial portion of the reinforcement layer;
- wherein the reinforcement layer includes woven fibers;
- wherein the woven fibers include axial fibers oriented parallel to the longitudinal axis and hoop fibers oriented in a circumferential direction relative to the longitudinal axis.
Dependencies are inferred from the claim text.