Flow Channel for a Mixer Heat Exchanger

A flow channel for a mixer heat exchanger, which flow channel is of tubular design with a longitudinal axis and with an inner surface area of circular cross section with an inside diameter and having at least one mixing insert of a length with a multiplicity of tubes guided parallel to the longitudinal axis of the flow channel over the length of the mixing insert and having an inside diameter having a multiplicity of crosswise arranged web plates of a width which forms with the longitudinal axis of the flow channel an angle, the web plates being arranged in two mutually intersecting plane groups having a multiplicity of parallel planes with a mutual spacing, and a third plane group which has a multiplicity of parallel planes with a mutual spacing corresponding to the width of the web plates intersecting the two mutually intersecting plane groups at right angles, the intersection lines of the planes of the two mutually intersecting plane groups forming, with the planes of the third plane group, longitudinal edges of the web plates arranged between adjacent planes of the third plane group alternately in the planes of the two mutually intersecting plane groups, the tubes being led through orifices in the web plates and being fastened to the web plates, wherein each mixing insert has at least twenty eight web plates crossed in pairs, the ratio of the width of the web plates to the inside diameter of the flow channel amounts to at most 0.25, the ratio of the length of the mixing insert to the inside diameter of the flow channel amounts to at least 0.4 and the angle of the web plates to the longitudinal axis of the flow channel amounts to 30° to 60°, and the ratio of the mutual spacing of adjacent planes of the mutually intersecting plane groups having the web plates to the inside diameter of the flow channel amounts to at most 0.3 and to the inside diameter of the tubes amounts to less than 6.