WO2016146296A1

WO2016146296A1 - Heat exchanger, in particular for a waste-heat utilization device

Info

Publication number: WO2016146296A1
Application number: PCT/EP2016/051939
Authority: WO
Inventors: Tobias Fetzer; Wilhelm Grauer; Boris Kerler; Marco Renz; Volker Velte
Original assignee: Mahle International Gmbh
Priority date: 2015-03-19
Filing date: 2016-01-29
Publication date: 2016-09-22
Also published as: DE102015204984A1

Abstract

The invention relates to a heat exchanger (1), in particular for a waste-heat utilization device, comprising a plurality of fluid paths (2) through which a fluid can pass, each fluid path (2) being at least partially delimited by a tubular body (3) and the tubular bodies (3) extending in a tubular body extension direction (E) and being stacked one on top of another in a stacking direction (S). A gas path (7), through which a gas can pass in the gas through-flow direction (G), is formed by each space (6) provided between two tubular bodies (3) lying adjacently to one another in the stacking direction (S). The gas through-flow direction (G) runs orthogonally to the tubular-body extension direction (E). The heat exchanger comprises a plurality of connecting paths (6), each path fluidically connecting at least two tubular bodies (3) lying adjacently to one another in the stacking direction (S).

Description

Heat exchanger, in particular for a waste heat utilization device

The present invention relates to a heat exchanger, in particular for a waste heat utilization device, and a waste heat utilization device with such a heat exchanger.

As a heat exchanger or heat exchanger is commonly referred to a device that transfers heat from one stream to another stream. Heat exchangers are used as cooling systems in motor vehicles in order to cool the fresh air charged by means of an exhaust gas turbocharger in a fresh air system cooperating with the internal combustion engine of the motor vehicle. For this purpose, the fresh air to be cooled, ie a gas, is introduced into the heat exchanger, where it thermally interacts with a fluid in the form of a likewise introduced into the heat exchanger coolant and emits heat in this way to the coolant. Such heat exchangers are referred to as charge air cooler. Conversely, however, heat exchangers can also be used to cool a liquid coolant by means of a gas. Such heat exchangers are referred to as coolant coolers.

Such a heat exchanger may for example be designed as a plate heat exchanger and having a plurality of tubular bodies, which are typically stacked in a stacking direction, wherein between the plates of a tubular body, a coolant path is formed through which the coolant is passed. In a gap formed between two adjacent tubular bodies, the medium to be cooled, such as the fresh air charged in an exhaust gas turbocharger, can be fluidically separated from the coolant, so that the coolant can be thermally interacting with the fresh air to be cooled through the tubular bodies. To improve the heat output In addition, rib structures can additionally be provided between adjacent tubular bodies which increase the interaction area of the tubular bodies available for the thermal interaction. Such constructions are familiar to those skilled in the art as so-called "fin-tube heat exchangers".

It is an object of the present invention to discover new ways of developing heat exchangers with improved efficiency, especially for motor vehicles.

This object is achieved by a heat exchanger according to independent claim 1. Preferred embodiments are subject of the dependent claims.

The basic idea of the invention is accordingly to equip the heat exchanger with a plurality of connection paths, which in each case fluidly connect at least two tubular bodies adjacent in the stacking direction. In this way, the introduced into the tubular body of the heat exchanger fluid, typically a coolant, particularly evenly distributed to the individual tubular body and are collected again after flowing through and the associated heat exchange with the gas to be cooled. In the case of a heat exchanger realized as a charge air cooler, this leads to a particularly homogeneous heat exchange of the fluid with the gas to be tempered, in particular to be cooled, such as the already mentioned fresh air charged by the turbocharger. This is accompanied by an increased efficiency of the heat exchanger. The principle proposed here according to the invention can readily be applied in the coolant radiator mentioned in the introduction. A heat exchanger according to the invention comprises a plurality of fluid paths for flowing through with a fluid. Each fluid path is at least partially bounded by a tubular body. The tubular bodies extend along a tube extension direction and are stacked along a stacking direction. The tube extension direction and the stacking direction may preferably be orthogonal to one another. Through a gap, which is present between two tubular bodies adjacent in the stacking direction, in each case a gas path for flowing through with a gas along a gas flow direction is formed. The gas flow direction is according to the invention orthogonal to the tubular body extension direction.

The fluid can flow in the opposite direction to the gas flow direction through the individual tubular body, along which the gas flows through the gas paths formed between the tubular bodies. By means of such a countercurrent principle is achieved that there is always a temperature gradient between gas and fluid. This ensures that heat exchange takes place between the gas and the fluid over the entire gas or fluid paths. This leads to a particularly high efficiency of the heat exchanger. In the present case, the term "gas throughflow direction" is understood to mean the direction along which the gas flows through the heat exchanger while it thermally interacts with the fluid.And it is understood that a portion of the gas flowing through the heat exchanger also extends in one direction in sections This may be the case, for example, when flow vortices are formed in the gas flow, ie the gas flow direction is a main flow direction of the gas flowing through the heat exchanger, which can vary locally applies to the fluid flowing through the tubular body. Essential to the invention is a plurality of connection paths, which in each case fluidly connect at least two tube bodies which are adjacent in the stacking direction.

In a preferred embodiment, the heat exchanger has at least one fluid inlet for distributing the fluid to the fluid paths and at least one fluid outlet for discharging the fluid from the heat exchanger after flowing through the fluid paths. In this embodiment, the heat exchanger is delimited along the stacking direction by a first tubular body and a second tubular body opposite the first tubular body in the stacking direction. The first tubular body has a first fluid distributor which is fluidically connected to the fluid inlet and a first fluid collector which is fluidically connected to the fluid outlet. Accordingly, the second tubular body has a second fluid distributor which is fluidically connected to the fluid inlet and a second fluid collector which is fluidically connected to the fluid outlet. The first fluid distributor can be fluidly separated from the first fluid collector by means of a partition wall formed on the first tubular body. The second fluid distributor can be fluidly separated from the second fluid collector by means of a second partition wall formed on the second tubular body. With the aid of the two fluid distributors, the fluid supplied to the heat exchanger via the fluid inlet can be uniformly distributed to the individual tubular bodies without expensive supply lines. By means of the two fluid collectors, the fluid can be collected directly after passing through the tubular body and the heat exchange there with the gas and discharged from the heat exchanger, without the need for additional discharges would be required.

Particularly expediently, the fluid inlet and the fluid outlet are arranged in a common housing wall delimiting the heat exchanger in the pipe body extension direction. In an advantageous development of the invention exactly two fluid inlets are present, which are present in the housing wall at opposite to the stacking direction wall ends. In this variant, exactly two fluid outlets are available. These are arranged in the housing wall with respect to the stacking direction opposite wall ends.

A particularly uniform spatial distribution of the fluid to the individual tubular body of the heat exchanger and a related, particularly homogeneous heat exchange between fluid and gas is achieved when at least one connection path fluidly interconnects all existing in the heat exchanger tubular body. Particularly preferably, this measure can be realized for all existing in the heat exchanger fluid paths.

Particularly expedient, because structurally particularly simple to implement, the connection paths can be formed as connecting tube bodies extending along the stacking direction, each having a first pipe mouth and a second pipe mouth opposite the first pipe mouth.

In another preferred embodiment, the tubular body extending direction along a longitudinal direction of the tubular body and the gas flow direction orthogonal thereto along a transverse direction of the tubular body. In this case, the connecting pipe body are arranged at two opposite in gas flow direction transverse ends of the tubular body. Preferably, the longitudinal direction is defined by a longitudinal side of the tubular body and the transverse direction by a transverse side of the tubular body.

In a further preferred embodiment, in at least one tubular body on a tube body which limits this tubular body in the stacking direction Wall formed a plurality of turbulence generating elements. In this case, the turbulence-generating elements project from this tubular body wall into the fluid path delimited by the tubular body. By means of the turbulence generating elements turbulent flows can be generated in the fluid flowing through the fluid paths, which effects an improved heat exchange of the fluid with the gas flowing through the gas paths. Therefore, all tubular bodies of the heat exchanger are particularly preferably provided with such turbulence generation elements.

Particularly pronounced turbulent flows may be generated in the fluid throughout the tube body when the plurality of turbulence generating elements are arranged in a raster-like manner with a plurality of raster lines with respect to a plan view of the tube body wall in the stacking direction. In this scenario, each raster line includes at least two turbulence generating elements and extends along the gas flow direction. At least two raster lines in the tube body extension direction are adjacent and spaced from one another.

Particularly preferably, the turbulence-generating elements of two adjacent in the tube body extension direction raster lines in the gas flow direction are offset from one another. In this way it is achieved that the fluid when flowing through the tubular body meets at least one turbulence generating element before it leaves again.

Particularly pronounced turbulence effects in the fluid flowing through the tubular bodies can be produced if the turbulence-generating elements are provided with a curved geometry in the plan view of the tubular body wall in the stacking direction. Particularly preferably, the connection paths along the tube extension direction, in particular the longitudinal direction, the tubular body at a distance from each other, in particular substantially equidistant, arranged. In this embodiment, at least one (first) connection path is arranged at a first transverse end of the tubular body. Accordingly, at least one (second) connection path is arranged at a second transverse end. The second transverse end lies opposite the first transverse end in the gas flow direction of the tubular body, in particular in the transverse direction of the tubular body.

Particularly preferably, all connection paths are present either at the first transverse end or at the second transverse end. In this way, the fluid can be uniformly introduced along the tube extension direction at the first transverse end into the tube body and discharged at the second transverse end opposite the first transverse end again from the tube bodies.

In an advantageous development, a first number of first connection paths are arranged at the first transverse end. Accordingly, a second number of second connection paths are arranged at the second transverse end. In this embodiment, the first number of connection paths substantially, preferably exactly, corresponds to the second number of connection paths. In this way, a particularly uniform flow through the tubular body can be achieved.

A heat exchanger with the above-described features according to the invention - including the preceding optional features - can be produced in a particularly simple manner and with particularly low production costs in series production by using an additive manufacturing method. In the present case, the term "additive production process" encompasses all production processes which produce the component directly from a computer mouse. dell out layer by layer. Such production processes are also known by the name "rapid forming". The term "Rapid Forming" is understood to mean, in particular, production processes for the rapid and flexible production of components by means of tool-free production directly from CAD data. The use of an additive manufacturing method allows the production of the heat exchanger according to the invention in a simple and flexible manner. In particular, this applies to the production of the tubular body and the fluidically connecting connecting tubular body. Because the use of an additive manufacturing process makes it possible to define the individual components of the heat exchanger such as pipe body, connecting pipe body, rib structure, fluid manifold and fluid collector, etc. directly as a CAD model and to manufacture directly from such a CAD model.

Preferably, the additive manufacturing process may include laser melting. This means that a laser melting process is used to manufacture the heat exchanger. By means of such a method, the heat exchanger can be produced directly from 3D CAD data. Basically, the heat exchanger during the laser melting tool-free and layered based on the three-dimensional CAD model associated with the heat exchanger.

Preferably, the heat exchanger may be integrally formed. Such a one-piece design is formed in particular when using the above-proposed additive manufacturing process, in particular laser melting. In a one-piece design of the heat exchanger eliminates the very costly and therefore costly attaching the individual components of the heat exchanger together. In particular, the cohesive fastening of the individual connecting tubular body to the tubular bodies can be omitted. The invention further relates to a waste heat utilization device with a previously presented heat exchanger.

Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

It show, each schematically

1 shows an example of a heat exchanger according to the invention in a perspective view,

FIG. 2.3 is an enlarged fragmentary view of the heat exchanger of FIG. 1. FIG.

FIG. 1 shows a perspective illustration of an example of a heat exchanger 1 according to the invention. Below it is assumed that this is used as intercooler. It is understood that the heat exchanger 1 but can also be used as a coolant cooler. The heat exchanger 1 comprises a plurality of fluid paths 2 for flowing through a fluid, for example a coolant. Each fluid path 2 is at least partially bounded by a tubular body 3. The tubular bodies 3 extend along a tube extension direction E and are stacked along a stacking direction S. Through a gap 4, which is present between two adjacent in the stacking direction S tubular bodies 3, a respective gas path 5 for flowing through a gas, for example air, along a gas flow direction G is formed.

In each space 4, a rib structure 24 may be provided, so be present. At the rib structure 24 adjacent tubular body 3 are based in the stacking direction S. By means of the rib structures 24, the effective, available for the heat exchange interaction surface of the tubular body 3 is increased. This leads to a further improvement in the efficiency of the heat exchanger 1. As can be seen from FIG. 1, the spaces 4 for introducing and removing the gas are designed to be open at opposite ends of the heat exchanger 1 along the gas flow direction G. Through these openings, the gas in the interstices 4 and 5 gas paths are switched on and discharged again.

The tubular body extension direction E may correspond to a longitudinal direction L of the tubular body 3, which is defined by a longitudinal side 17 of the tubular body 3 - defined in a section perpendicular to the stacking direction S of the tubular body 3. The gas flow direction G, the tube body extension direction E and the stacking direction S in the example scenario each extend orthogonal to one another.

Essential to the invention is a plurality of connection paths 6, which each fluidically miteinan at least two adjacent in the stacking direction tubular body 3 the connect. In the example scenario of the figures, each of the connection paths 6 connects each tube body 3 with each other.

FIG. 2 shows a lower part of the heat exchanger 1 of FIG. 1 with respect to the stacking direction S in a partial view. As can be seen from FIG. 2, the connecting paths 6 are realized as connection tube bodies 10 extending along the stacking direction S, each of which can have a first tube mouth 7a and a second tube mouth 7b opposite the first tube mouth 7a. In this case, the connecting pipe bodies 10 are arranged at two transverse ends 16a, 16b of the tubular body 3 which are located in the gas flow direction G, ie the transverse direction Q, opposite the transverse direction. The gas flow direction G corresponds in the example of a transverse direction Q of the tubular body 3, defined in a section of the tubular body 3 perpendicular to the stacking direction S. The transverse direction Q is in turn defined by a transverse side 18 of the tubular body 3 and extends in the example perpendicular to the longitudinal direction L.

Furthermore, the heat exchanger 1 has at least one fluid inlet 8 for distributing the fluid to the fluid paths 2 or tubular body 3 and at least one fluid outlet 9 for discharging the fluid from the heat exchanger 1 after flowing through the fluid paths 2. In the example scenario, two fluid inlets 8 and two fluid outlets 9 are provided. The heat exchanger 1 is bounded along the stacking direction S by a first tubular body 3a and a second tubular body 3b opposite the first tubular body 3b in the stacking direction S. The first tubular body 3a has a first fluid distributor 11a connected fluidically to the fluid inlet 8 and a first fluid collector 12a fluidically connected to the fluid outlet 9. Correspondingly, the second tubular body 3b has a second fluid distributor 11b which is fluidically connected to the fluid inlet 8 and a second fluid collector 12b which is fluidically connected to the fluid outlet 9. The first fluid distributor 11a is formed by means of a first tube body 3a Partition 13a fluidly separated from the first fluid collector 12a. The second fluid distributor 11b is fluidically separated from the second fluid collector 12b by means of a second partition wall 13b formed on the second tubular body 3b. The two dividing walls 13a, 13b, which are not actually visible in the illustration of FIGS. 1 and 2, are indicated in these figures for clarity in a dashed representation.

With the aid of the two fluid distributors 11a, 11b, the fluid supplied to the heat exchanger 1 via the fluid inlet 8 can be evenly distributed to the individual tubular bodies 3 without expensive supply lines. The distribution of the fluid to the individual tubular body 3 is done by means of extending in the stacking direction S connecting paths 6 and connecting pipe body 10. By means of the two fluid accumulators 12a, 12b, the fluid after flowing through the tubular body 3 and there heat exchange with the Gas - without a complex discharge system would be required - collected directly from the tubular bodies 3 and derived from the heat exchanger 1. Also, the collection of the fluid from the tubular bodies 3 takes place with the aid of the connecting paths 6. The fluid thus flows within a tubular body 3 in the opposite direction to the gas flow direction G through the individual tubular bodies 3 (see arrows 22 in Figure 2), i. The gas G flows substantially at a 180 ° angle relative to the fluid through the interspaces 4 or through the gas paths 5. By means of such a countercurrent principle can be achieved that there is always a temperature gradient between the fluid and the gas to be cooled. This ensures that heat exchange between the gas and the fluid also takes place over the entire gas or fluid paths 5, 2. This leads to a particularly high efficiency of the heat exchanger 1.

In the present case, "gas throughflow direction" is understood to mean the direction along which the gas passes through the gas paths 5 of the heat exchanger 1 flows while it is in thermal interaction with the fluid. It is understood that a portion of the gas flowing through the heat exchanger 1 can also flow in sections in a direction which deviates from the gas flow direction G. This may be the case, for example, when flow vortices form in the gas flow. In the gas flow direction G is thus a main flow direction of the gas flowing through the heat exchanger, which can vary locally. The same applies mutatis mutandis for the fluid flowing through the heat exchanger.

Particularly expediently, the fluid inlet 8 and the fluid outlet 9 are arranged in a housing wall 14 delimiting the heat exchanger 1 in the direction of the tube body extension E. 1 shows that the heat exchanger 1 can have not only a single but two fluid inlets 8, which are provided in the housing wall 14 with respect to the stacking direction S opposite wall ends 15a, 15b. Accordingly, two fluid outlets 9 are also present. These are arranged as shown in Figure 1 in the housing wall 14 with respect to the stacking direction S opposite wall ends 15a, 15b.

Preferably, the connection paths 6 are arranged at a distance from one another along the tube body extension direction E or the longitudinal direction L of the tube body 3. In particular, the arrangement as in Figures 1 and

2 with equidistant spacing a along the tube body extension direction E or longitudinal direction L of adjacent connection paths 6 or connecting tube body 10. It can be seen that the connecting paths 6 or the connecting tube bodies 10 either at a transverse end Qa, and thus also the gas flow direction G, of the first transverse end 16a of the tube body 3 or in the transverse direction Qa first transverse end 16a or gas flow direction G opposite second Transverse end 16b arranged. The connecting paths 6 arranged at the first transverse end 16a are referred to below as "first connecting paths" 6, the connecting paths arranged at the second transverse end 16b as "second connecting paths" 6. In the example scenario of the figures, the heat exchanger 1 has the same number of first and Second connection paths 6. The arranged at the first transverse end 16a connecting Rohrkorper 10 open with their first pipe mouths 7a in the first fluid manifold 1 1 a and with their second pipe mouths 7b in the second fluid manifold 1 1 b. Correspondingly, the connecting tube bodies 10 arranged at the second transverse end 16b open with their first tube openings 7a in the first fluid collector 12a and with their second tube openings 7b in the second fluid collector 12b. In order to connect the connecting tube body 10 also fluidly with the individual tubular bodies 3, so that the fluid from the connecting tubular bodies 10 in the tubular body 3 on or can escape, 10 breakthroughs can be formed in the connecting tubular bodies (not shown ). Alternatively, the connecting Rohrkorper 10 may be interrupted in the region of the tubular body 3. The latter variant is particularly useful when the heat exchanger 1 is formed in one piece, as may be true in a production of the heat exchanger 1 using an additive manufacturing process.

2 shows a partial view of Figure 1, but differs from Figure 2 in that the heat exchanger 1 is shown in the partial view of Figure 3 with respect to Figure 1 "cut off" within a tubular body 3. Thus, the interior It can be seen that a plurality of turbulence-generating elements 20 are formed in a tubular body 3 'on a tubular body wall 19 bordering this tubular body 3' in the stacking direction S. Such turbulence-generating elements 20 20 can also be used in all other tubular bodies 3 with the exception of the first and second tubular body 3a, 3b be present. The turbulence generating elements 20 project from this tubular body wall 19 into the fluid path 2 bounded by the tubular body. By means of the turbulence generating elements 20, turbulent flows are generated in the fluid flowing through the fluid paths 2. These cause an improved heat exchange of the fluid with the gas flowing through the gas paths 5 gas.

As clearly shown in FIG. 3, the plurality of turbulence-generating elements 20 can be arranged with a plurality of raster lines 21 in a raster-like manner with respect to a plan view of the tubular body wall 19 of the tubular bodies 3 ', 3 in the stacking direction S. In this scenario, each raster line 21 comprises at least two turbulence generating elements 20 and extends along the gas flow direction G. In this case, the individual raster lines 21 in the tubular body extension direction E are adjacent and spaced from one another. Preferably, the turbulence generating elements 20 of two adjacent in the pipe body extension direction E raster lines 21 as shown in Figure 3 in the gas flow direction G offset from one another. In this way, it is ensured that the fluid when flowing through the respective tubular body 3, 3 'meets at least one turbulence generating element 20. Particularly pronounced turbulence effects in the fluid flowing through the tubular bodies 3 and impinging on the turbulence generating elements 20 can be generated when the turbulence generating elements 20 have a curved geometric shape with respect to a plan view of the tubular body wall 19 in the stacking direction S. By means of the turbulence generating elements 20, the fluid flowing in opposite direction to the direction of gas flow through the tubular body 3 is deflected laterally, ie towards the tubular body extension direction E.

As indicated in FIG. 3 by arrows with the reference numeral 22, the fluid, that is to say typically a coolant, passes through one of the two fluid inlets 8 into the heat exchanger 1 and via the respective fluid inlet 8 associated first or second fluid distributor 1 1 a, 1 1 b by means of the stacking direction

5 extending communication paths 6 on the individual fluid paths 2, which are bounded by the tubular body 3 distributed. For this purpose, the fluid entering the first or second fluid distributor 11a, 11b is arranged via the connecting paths formed on the first transverse end 16a and formed by the connecting tube bodies 10

6 distributed in the stacking direction S on the pipe body 3 arranged between the first and second pipe body 3a, 3b. The tubular bodies 3 are flowed through by the fluid along the gas flow direction G, which also runs parallel to the transverse direction Q, at least in the example of the figures. After flowing through the tubular body 3, the fluid is received by the arranged at the second transverse end 16b, formed by the connecting tubular bodies 10 connecting paths and passes from there into one of the two fluid collector 12a, 12b. The fluid is discharged from the heat exchanger 1 again via the fluid outlet 9 assigned to the respective fluid collector 12a, 12b.

The above-discussed heat exchanger 1 with the above-described inventive features - including the preceding optional features - can be produced in a particularly simple manner and with particularly low manufacturing costs in series production by using an additive manufacturing process. Preferably, the additive manufacturing process may include laser melting. This means that a laser melting process is used to manufacture the heat exchanger. By means of such a method, the heat exchanger 1 with its various components can be produced directly from 3D CAD data. In principle, the heat exchanger 1 is produced without tools during the laser melting and in layers on the basis of the three-dimensional CAD model assigned to the heat exchanger 1. The use of an additive manufacturing method, in particular laser melting, simplifies the manufacture of the heat exchanger 1 with its opposite conventional heat exchangers complicated geometry. In particular, this applies to the production of the connecting pipe body 10 essential to the invention: For the use of an additive manufacturing method allows the individual components of the heat exchanger 1, such as the tubular body 3 including the connecting tubular body 10, the rib structures 24, the fluid distributor 11a, 1 1 b and the fluid collector 12a, 12b, etc. as a CAD model to define and manufacture directly from such a CAD model out.

Particularly preferably, the heat exchanger 1 can be formed in one piece. Such a one-piece design is formed in particular when using an additive manufacturing process, in particular laser melting. By means of a one-piece design of the heat exchanger 1 eliminates the very costly and therefore costly attaching the individual components of the heat exchanger together. In particular, the cohesive fastening of the individual connecting tubular body 10 to the tubular bodies 3 is eliminated.

Claims

claims

1 . A heat exchanger (1), in particular for a waste heat utilization device, having a plurality of fluid paths (2) for flowing through a fluid, each fluid path (2) being at least partially bounded by a tubular body (3), the tubular bodies (3) extending along one Extending pipe extension direction (E) and stacked along a stacking direction (S),

wherein in each case a gas path (7) for flowing through a gas along a gas throughflow direction (G) is formed by a gap (6) which is present between two tubular bodies (3) which are adjacent in the stacking direction (S),

wherein the gas flow direction (G) is orthogonal to the tube body extending direction (E),

wherein the heat exchanger comprises a plurality of connection paths (6) which in each case fluidly connect at least two tubular bodies (3) adjacent in the stacking direction (S) to one another.

2. Heat exchanger according to claim 1,

characterized in that

the heat exchanger (1) has at least one fluid inlet (8) for distributing the fluid to the fluid paths (2) and at least one fluid outlet (9) for discharging the fluid from the heat exchanger (1) after flowing through the fluid paths (2), the heat exchanger (1) is delimited along the stacking direction (S) by a first tubular body (3a) and a second tubular body (3b) lying opposite the first tubular body (3),

the first tubular body (3a) has a first fluid distributor (11a) fluidically connected to the fluid inlet (8) and a first fluid collector (12a) fluidically connected to the fluid outlet (9), the first fluid distributor (12a) being connected by means of a first fluid distributor (12a) Tube body (3a) existing partition (13a) is fluidly separated from the first fluid collector (12a),

the second tubular body (3b) has a second fluid distributor (11b) fluidly connected to the fluid inlet (8) and a second fluid collector (12b) fluidically connected to the fluid outlet (9), the second fluid distributor (11b) being connected by means of a in the second tubular body (3b) existing second partition (13b) is fluidly separated from the second fluid collector (12b).

3. Heat exchanger according to claim 2,

characterized in that

at least one of the fluid inlet (8) and the at least one fluid outlet (9) are provided in a housing wall (14) delimiting the heat exchanger (1) in the pipe body extension direction (E).

4. Heat exchanger according to claim 2 or 3,

characterized in that

exactly two fluid inlets (8) are present, which are present in the housing wall (14) with respect to the stacking direction (S) opposite wall ends (15a, 15b),

exactly two fluid outlets (9) are present, which in the housing wall (14) with respect to the stacking direction (S) opposite wall ends (15a, 15b) are present.

5. Heat exchanger according to one of the preceding claims,

characterized in that

at least one connection path (6), preferably all connection paths (6), all in the heat exchanger (1) existing tubular body (3) in the stacking direction (S) fluidly interconnected.

6. Heat exchanger according to one of the preceding claims,

characterized in that

the connecting paths (6) are formed as connection tube bodies (10) extending along the stacking direction (S), in particular each having a first tube mouth (7a) and a second tube mouth (7b) opposite the first tube mouth (7a).

7. Heat exchanger according to one of the preceding claims,

characterized in that

the pipe body extending direction (E) is along a longitudinal direction (L) of the pipe bodies (3) and the gas flow direction (G) is orthogonal thereto along a transverse direction (Q) of the pipe bodies (3),

the connection paths (6) are arranged at two transverse ends (16a, 16b) of the tubular bodies (3) which are opposite in the gas flow direction (G).

8. Heat exchanger according to one of the preceding claims,

characterized in that

a plurality of turbulence generating elements (20) are formed in at least one tubular body (3) on a tubular body wall (19) delimiting said tubular body (3) in the stacking direction (S). 3) limited fluid path (2) protrude into it.

9. Heat exchanger according to claim 8,

characterized in that

the plurality of turbulence generating elements (20) are arranged in a grid-like manner with a plurality of raster lines (21) in a plan view of the tubular body wall (19) in the stacking direction (S),

wherein each raster line (21) comprises at least two turbulence generating elements (20) and extends along the gas flow direction (G), wherein at least two raster lines (21) in the tube body extension direction (E) are adjacent and spaced from one another.

10. Heat exchanger according to claim 9,

characterized in that

the turbulence generating elements (20) of two in the tube body extension direction (E) of adjacent raster lines (21) in the gas flow direction (G) are arranged offset to one another.

1 1. Heat exchanger according to one of claims 8 to 10,

characterized in that

the turbulence generating elements (20) are curved in plan view of the tubular body wall (19) in the stacking direction (S).

12. Heat exchanger according to one of the preceding claims,

characterized in that

the connection paths (6) are arranged along the tube extension direction (E), in particular the longitudinal direction (L), the tube body (3) at a distance from each other, in particular substantially equidistant, at least one (first) connection path (6) at a first transverse end (16a) of the tube bodies (3) and at least one (second) connection path (6) at a second, the first transverse end (16a) in the gas flow direction (G), in particular the transverse direction (Q) of the tubular body (3), opposite, second transverse end (16 b) of the tubular body (3) is arranged.

13. Heat exchanger according to claim 12,

characterized in that

the connection paths (6) are provided either at the first transverse end (16a) or at the second transverse end (16b).

14. Heat exchanger according to claim 12 or 13,

characterized in that

a first plurality of first connection paths (6) disposed at the first transverse end (16a) substantially, preferably exactly, correspond to a second plurality of second connection paths (6) disposed at the second transverse end (16b) ,

15. Heat exchanger according to one of the preceding claims,

characterized in that

the heat exchanger (1) is produced by means of an additive manufacturing process.

16. Heat exchanger according to claim 15,

characterized in that

the additive manufacturing process comprises laser melting.

17. Heat exchanger according to one of the preceding claims, characterized in that

the heat exchanger (1) is integrally formed.

18. Waste heat utilization device with a heat exchanger (1) according to one of the preceding claims.