A ceramic tubesheet pierced by a plurality of hollow, glass fibers and consisting of sintered particles is rendered essentially impermeable by selectively fusing the portion of the tubesheet subjacent to and defining one of its surfaces. The fiber lengths extending from the opposite surface of the tubesheet are freer to flex and less likely to be broken than if the entire tubesheet were fused.
CROSS-REFERENCE TO RELATED APPLICATION
This is a divisional, of application Ser. No. 012,637 filed Feb. 16, 1979, now U.S. Pat. No. 4,219,613 issued Aug. 26, 1980.
Method for producing a high temperature resistant exchanger. The exchanger is made from a number of tubes sealingly connected to a pipe plate which is further connected to an enclosure. The pipe plate is realised by positioning enclosure and tubes in a mould and pouring a ceramic slurry which is subsequently sintered.
Several advantages as to ease of cell fabrication, maximum cell size, fiber breakage, tubesheet tightness, resistance to tubesheet deformation in prolonged service, safety, etc., can be realized by using as the tubesheet in a hollow fiber type battery cell one which is elongated in shape, has a substantially smaller diameter than the fiber "bundle" depending from it and in which the fiber ends passing through it are closely packed.
Several advantages as to ease of cell fabrication, maximum cell size, fiber breakage, tubesheet tightness, resistance to tubesheet deformation in prolonged service, safety, etc., can be realized by using as the tubesheet in a hollow fiber type battery cell one which is elongated in shape, has a substantially smaller diameter than the fiber "bundle" depending from it and in which the fiber ends passing through it are closely packed.
The exchanger is made from a number of tubes sealingly connected to a pipe plate which is further connected to an enclosure. The pipe plate is realized by positioning enclosure and tubes in a mould and pouring a ceramic slurry which is subsequently sintered.
