Countercurrent heat exchanger with two volume flows, characterized by a heat exchanger element, which consists of a heat exchanger matrix 1, which is formed by horizontally stacking two superimposed foils, a smooth foil 2 and a corrugated foil 3, so that parallel channels 4 with a first effective cross-section 5, which extend from one matrix end face to the opposite end face, and the walls of which are all connected to one another in a heat-conducting manner, and which consists of pipe sections 11, 12 which are placed gas-tight on the opposite matrix end faces and one opposite the first Cross-section 5 large second cross-section 18 a, 18 b, the pipe sections 11, 12 have a rectangular cross-section with a width that is equal to the width of a matrix end face and are placed on the two matrix end faces at a distance from one another that the area between two be adjacent pipe sections 11 and 12 is equal to the inner cross-sectional area of an attached pipe section, and the pipe sections 11 are not aligned with the pipe sections 12, so that the volume flow 13 of the one fluid is introduced via the pipes 11 into a bundle of longitudinal matrix channels 15 a and on the opposite matrix end face through the open ends of the longitudinal channel bundle out of the matrix into outlet openings 16, and in the same way the volume flow 14 of the other fluid is introduced in countercurrent to the volume flow 13 via the tubes 12 into a bundle of longitudinal channels 15 b and on the opposite matrix front side is discharged through the open ends of the longitudinal channel bundle out of the matrix into outlet openings 17.
展开▼
