GB284338A - - Google Patents

Abstract

284,338. Soc. Anon. des Etablissements Delaunay-Belleville. Jan. 29, 1927, [Convention date]. Heating air. - In a heat exchanger comprising a nest of tubes 4 for the passage of one fluid, the other fluid traversing the outer surfaces in flowing from a side inlet 5 to a side exit 6, the section of the tubes adjacent to the inlet and outlet is reduced as at 13, 14 to facilitate the penetration of the fluid among the tubes. The reduction in section may be effected by simple flattening, as at 4<1> Fig. 6, or by bending the side walls inwards or by having tubes with concentric end-sections of smaller diameter. A baffle 19 which may be perforated, may be fitted, as shown, to form a tube-free fluid-conducting space 20 at the rear of the exchanger. The Specification, as open to inspection under Sect. 91 (3) (a) comprises also the use of the baffle 19 in heat-exchangers which do not employ tubes with reduced end-sections. This subjectmatter does not appear in the Specification as accepted.