TUBE-AND-PLATE HEAT EXCHANGER

摘要

A tube-and-plate heat exchanger comprises a plurality of plain tubes intended for one of the heat carriers to pass therethrough, which tubes are arranged in parallel rows and are received in broachod holes of cooled plates. In cross section the plates are pro-filed so as to form, in the flow direction of another, for example, gaseous heat carrier, continuous symmetric wave line, thereby forming a passage of undulatory shape for the gaseous heat carrier to flow therethrough. Projections and depressions of one plate face respective projections and depressions of another adjacent plate, thereby forming continuously alternating divering-converging sections of passages. The projections and depressions of the cooled plates mate with rectilinear sections which have the same angle of inclination to the axis of symmetry of the cross-sectional wave line, ranging from 8 to 45 deg. The bending radius at the mating place of projections and depressions is not more than twenty times the thickness of the cooled plate material. To ensure good thermal contact between the plain tubes and the cooled plates, which is obtained by sintering, edges of the broached holes are formed throughout their surfaces around the periphery of each tube. The heat exchanger of the invention, intended for use as a water-air cooler, is smaller m size and weight, being, all other conditions equal, highly resistant to contamination, preventing airsuspended particles of dust and dirt from penetrating to the air space thereof.