Abstract: A plurality of parallel tubes in the form of at least a first plurality of parallel tube rows and a second plurality of parallel tube rows are supported by a baffle comprising an outer ring capable of surrounding the tubes and a plurality of parallel rods which form a plurality of parallel chords with the outer ring wherein the rods are capable of passing in the spaces between the tubes forming adjacent parallel tube rows of one plurality of parallel tube rows and wherein the number of rods in the baffle is substantially less than the total number of rods which could be positioned in the spaces between the tube rows in the plurality of parallel tube rows.

Abstract: In a shell and tube heat exchanger, cooperation between a shell and shroud within the shell is established by at least one boss extending radially outward from the exterior surface of the shroud and at least one channel on the inside of the shell. The channel has longitudinal and circumferential path portions which are adapted to receive the boss so as to allow for longitudinal and radial temperature expansion without incurring undesirable stresses on either the shell or the shroud. The shroud is disclosed as further including at least one longitudinally extending alignment guide which enables cooperation with guide rails associated with a tube bundle positioned within the shroud.

Abstract: A baffle is mounted in a ring having a beveled edge to facilitate movement in a direction normal to the plane of the baffle.

Abstract: The tubes in a U-tube bundle are supported by rod baffles characterized by inner and outer arcuate rod support members. Methods and apparatus for assemblint the components of the heat exchanger are also provided.

Abstract: A baffle is mounted in a ring having a beveled edge to facilitate movement in a direction normal to the plane of the baffle.

Abstract: The tubes in a U-tube bundle are supported by rod baffles characterized by inner and outer arcuate rod support members. Methods and apparatus for assembling the components of the heat exchanger are also provided.

Abstract: The heat transfer coefficient of a tube bundle is improved by providing the bundle with at least one transverse vortex generating member.

Abstract: The heat transfer coefficient of a tube bundle is improved by providing the bundle with at least one transverse vortex generating member.

Abstract: In a rod baffled tube and shell heat exchanger a rod having non-circular (e.g., elliptical) cross section allows easy assembly and firm engagement of the rods and the tubes by simple rotation of the rods around their axes.

Abstract: The heat transfer coefficient of a tube bundle is improved by providing the bundle with at least one transverse vortex generating member.

Abstract: A heat exchanger has the tube sections supported by one or more units comprising a cylinder section surrounding the bundle of tube sections and having rods forming a rod baffle attached to each of its two opposing faces. In another embodiment, the tube sections are surrounded along a substantial porton of their length by a shroud cylinder having a plurality of rod baffles attached thereto. The shroud cylinder can be composed of a plurality of cylinder sections having recesses in their opposing faces so that abutting faces of adjacent shroud cylinder sections have facing pairs of recesses which correspond in shape essentially to the shape of the end of the rods of a rod baffle.

Abstract: In a cryogenic plant utilizing a liquid sparged into a cold vapor in heat exchange relationship with hotter vapor, variations in the load in terms of the volume of hot vapor are compensated for by a stepwise complete closing of a uniformly-spaced-apart fraction of the cold vapor passageways.

Abstract: A plurality of parallel tubes in the form of at least a first plurality of parallel tube rows and a second plurality of parallel tube rows are supported by a baffle comprising an outer ring capable of surrounding the tubes and a plurality of parallel rods which form a plurality of parallel chords with the outer ring wherein the rods are capable of passing in the spaces between the tubes forming adjacent parallel tube rows of one plurality of parallel tube rows and wherein the number of rods in the baffle is substantially less than the total number of rods which could be positioned in the spaces between the tube rows in the plurality of parallel tube rows.

Abstract: A baffle comprises an outer ring suitable for surrounding a plurality of parallel tubes formed into a tube bundle, said tube bundle having at least a first plurality of parallel tube rows, a second plurality of parallel tube rows, and spaces between the adjacent tube rows, said outer ring positioned in a plane which is not perpendicular to the longitudinal axis of the tube bundle, said plane forming a baffle angle with a plane which is perpendicular to the longitudinal axis of the tube bundle, and a plurality of parallel rods cooperating with and attached to the outer ring to form a plurality of parallel chords with the outer ring wherein the rods are capable of passing in the spaces between the tubes forming adjacent parallel tube rows of one plurality of parallel tube rows.

Abstract: In a cryogenic plant utilizing a liquid sparged into a cold vapor in heat exchange relationship with hotter vapor, variations in the load in terms of the volume of hot vapor are compensated for by a stepwise complete closing of a uniformly-spaced-apart fraction of the cold vapor passageways.

Abstract: In order to obtain uniform mixing of materials in an agitated vessel, temperature measurements are made at two regions of the vessel spaced from one another. The amount of agitation imparted to the vessel is adjusted until the two measured temperatures are the same.