Heat exchanger

A heat exchanger comprising a jacket element and an insert element, wherein the jacket element is configured as a fluid channel for a fluid to be tempered, wherein the jacket element comprises a longitudinal axis, wherein the insert element is arranged in the fluid channel, wherein the insert element contains a plurality of web elements which are connected to the jacket element at different locations, wherein the plurality of web elements are arranged in at least a first row of the plurality of web elements and a second row of the plurality of web elements, wherein the plurality of web elements of each of the first and second rows of the plurality of web elements are arranged essentially parallel to one another, wherein angles which the plurality of web elements of different rows of web elements enclose with the longitudinal axis of the jacket element differ, wherein at least some of the plurality of web elements contain web element channels which are fluidly connected with the jacket element, so that in an operating state a heat transfer fluid which is supplied to the jacket element can flow through the web element channels of the plurality of web elements, wherein the jacket element contains a plurality of chambers for the heat transfer fluid, wherein each of the plurality of chambers contains at least one inlet opening and at least one outlet opening for the heat transfer fluid or is configured as a distribution chamber or as a collection chamber, wherein the at least one inlet opening and the at least one outlet opening of at least one of the plurality of chambers are connected to the web element channels of two web elements each, which belong to a same row of the plurality of web elements, if a chamber is not configured as the distribution chamber or the collection chamber.