| 摘要 |
<p>A tubular-lamellar heat exchanger comprises flat tubes (1) arranged in parallel rows and fixed in openings (8) pierced in cooled plates (2, 3). In a cross-section along the flow direction of another medium, for example gaseous heat-carrying medium, the plates (2, 3) have a profile of continuous and symmetrically undulating lines, so as to form an undulating channel for passage of that gaseous heat-carrying medium. Projections (4) and depressions (5) of each plate are located against projections (6) and depressions (7) of the adjacent plate (3), so that alternating diffuser and converging zones are formed along the channels. The projections (4, 6) and the depressions (5, 7) of the cooled plates (2, 3) are conjugated with each other through straight parts (10) having the same angle ((Alpha)) of inclination to the axis (11) of symmetry of their cross-section undulating line, that angle being equal to 8 to 45 . The internal radius (R) of conjugation between the projections (4, 6) and the depressions (5, 7) does not exceed 20 times the thickness of the material of the cooled plate (2, 3). For providing a better thermal contact between the flat tubes (1) and the cooled plates (2, 3), caked with each other, the crimps (9) of the pierced openings (8) are shaped, throughout their surface, following the surface generating lines of the tubes (1). </p> |
