Corrugated fin type heat exchanger

A corrugated fin type heat exchanger comprising a plurality of equally spaced parallel tubes arranged in a single row and defining therein a first series of passages for a first fluid and a corrugated strip defining fins disposed between and thermally connected to each pair of adjacent tubes to cooperate therewith to define a second series of passages for a second fluid, each of said tubes being of the same substantially rectangular cross-section and arranged such that the longitudinal axis of said rectangular cross-section is substantially parallel to the direction of the flow of the second fluid passing through said second series of passages, means defining an inlet chamber for the first fluid operative to distribute the first fluid to said tubes, and means defining an outlet chamber operative to gather flows of the first fluid from said tubes, characterized by:

• the dimension of each of said fins as measured in the direction of the flow of the second fluid is within the range of from 12 mm to 23 mm;
• the pitch of the corrugations of said corrugated strip defining said fins is within the range of from 1.5 mm to 3.3 mm;
• the dimension of the longitudinal axis of the rectangular cross-section of each said tube is within the range of 8 mm to 23 mm but not greater than the dimension of each said fin as measured in the direction of the flow of the second fluid;
• the pitch of said tubes is within the range of from 8.5 mm to 14 mm;
• said fins are louvered to provide vanes and openings, said vanes of each fin being arranged in at least two successive groups in the direction of the flow of the second fluid with the vanes in each group being inclined with respect to the general plane of the corresponding fin at an angle opposite to that of the vanes of adjacent groups;
• the width of each vane is within the range of from 0.7 mm to 1.2 mm;
• and
• each vane is inclined at an angle of from 18.degree. to 32.degree..