EP4630748A1

EP4630748A1 - Modular cooling system for a power source

Info

Publication number: EP4630748A1
Application number: EP22835267.0A
Authority: EP
Inventors: Rodrigo Caus MARTINS; Johan Olson
Original assignee: Volvo Penta AB
Current assignee: Volvo Penta AB
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2025-10-15
Also published as: WO2024120641A1

Abstract

A modular heat exchanger module (1) for a power source (101) comprising a first end part (2), a first radiator section (18) and a second end part (10), where the first end part (2) is provided with an inlet opening (3) and a first outlet opening (6), where the second end part (10) is provided with a first inlet opening (11) and an outlet opening (15), where the first outlet opening (6) of the first end part (2) is connected to an inlet opening (19) of the first radiator section (18), where an outlet opening (20) of the first radiator section (18) is connected to the first inlet opening (11) of the second end part (10), where the first end part (2) is releasably connected to the first radiator section (18) and that the first radiator section (18) is releasably connected to the second end part (10).

Description

MODULAR COOLING SYSTEM FOR A POWER SOURCE

TECHNICAL FIELD

The present invention relates to a modular cooling system to be used with a power source, e.g. a combustion engine, an electrical motor or a fuel cell. The cooling system may be used for vehicles or stationary installations. The cooling system can be configured for the power output and power usage of the power source, and will save space and weight.

BACKGROUND ART

Combustion engines are mostly provided with a cooling system comprising a radiator through which a cooling liquid is flowing. The cooling liquid is normally water based consisting of water and an anti-freeze component, such as an alcohol, but oil-based cooling liquids are also used in some installations. The radiator is often provided with a cooling fan that can increase the air flow through the radiator in order to increase the cooling capacity of the radiator and thus of the cooling system. The cooling system may also be provided with a temperature sensor of some type that can start the cooling fan when an increased cooling capacity is required.

A cooling system is often designed for a worst case scenario such that the cooling system will be able to allow the combustion engine to run at full load over the complete specified temperature range. For a standard vehicle, the size of the radiator is fixed and cannot be changed, and the vehicle is delivered with an installed cooling system comprising a radiator with a fixed size and cooling capacity. For a standard vehicle, such a solution is mostly useful, since e.g. a truck is used in different conditions, where some conditions will resemble a worst case scenario, e.g. at summer or when driving uphill steep inclines. For other types of vehicles, such as container handlers or terminal tractors, a standard cooling system including a standard radiator may be over-dimensioned since the vehicle is only used with a low load or under short time intervals. For other installations, e.g. for industrial installations where a power system comprising an internal combustion engine or another type of power source is used to drive a generator as a back-up system for electricity or for driving a pump at a remote location, the power system is often sold as a complete package with a combustion engine, a cooling system comprising a radiator and an engine control system. The radiator is adapted for the size and power output of the engine, and for the complete temperature range for the installation. Depending on the intended use of the power system and on the intended location, the cooling system may be over-dimensioned. In some cases, the customer engine may e.g. only use part of the available output power, and the engine may e.g. never deliver more than 50% of the maximum power. In another example, the engine may be used intermediately such that it delivers peak power for a few minutes and then run on idle for most of the time. In such power systems, the standard radiator is often too large for the actual use, and will induce unnecessary weight, size and cost.

The producer or original equipment manufacturer can in such a case design the radiator and the power system himself, by buying parts for the power system from different suppliers. This may be cost-effective but may result in a power system that is not working optimal since it may be difficult for the designer to dimension the cooling system adequately. Often, this results in a cooling system that is over-dimensioned since the designer of the system wants to be on the safe side. There may also be a risk that the selected radiator is too small such that the engine does not run within specifications.

Even if these systems often functions well, there is room for an improved cooling system for a power source.

DISCLOSURE OF INVENTION

An object of the invention is therefore to provide an improved heat exchanger module for a cooling system. A further object of the invention is to provide an improved cooling system. A further object of the invention is to provide a vehicle comprising such a cooling system.

The solution to the problem according to the invention is defined by the features of the main claims. The other claims contain advantageous further developments of the heat exchanger module and the cooling system.

In a modular heat exchanger module for a cooling system comprising a first end part, a first radiator section and a second end part, where the first end part is provided with an inlet opening and an outlet opening, where the second end part is provided with an inlet opening and an outlet opening, where the outlet opening of the first end part is connected to an inlet opening of the first radiator section, where an outlet opening of the first radiator section is connected to the inlet opening of the second end part, the object of the invention is achieved in that the first end part is releasably connected to the first radiator section and that the first radiator section is releasably connected to the second end part.

By this first embodiment of the heat exchanger module for a cooling system, a heat exchanger module can be assembled to the required specifications of a power system. A producer of a cooling system is thus not bound to use a standard radiator, but can assemble a heat exchanger module to the actual needs of the power system. Several heat exchanger modules can be assembled in parallel, such that the effective cooling surface of the radiator can be selected freely.

In one example, the heat exchanger module further comprises an intermediate part and a second radiator section, where the outlet opening of the first radiator section is connected to an inlet opening of the intermediate section, where an outlet opening of the intermediate section is connected to an inlet opening of the second radiator section and where an outlet opening of the second radiator section is connected to the inlet opening of the second end part, where the first radiator section is releasably connected to the intermediate section, that the intermediate section is releasably connected to the second radiator section and that the second radiator section is releasably connected to the second end part. In this example, several radiator sections can be assembled in series, such that the effective radiator surface can be increased. Heat exchanger modules can also be assembled in parallel, such that the effective radiator surface can be further increased if required. By arranging radiator sections both in series and in parallel, the flow through the heat exchanger can be controlled.

When arranging modular heat exchanger modules in parallel, the second outlet opening of a first end part of a first modular heat exchanger module is attached to the inlet opening of a first end part of a second modular heat exchanger module, and the outlet opening of a second end part of the first modular heat exchanger module is attached to the first inlet opening of the second modular heat exchanger module. In this way, a number of modular heat exchanger modules can be attached in parallel in an easy way. An end cap is used to close the unused second outlet opening of a first end part and the unused first inlet opening of a second end part.

A modular heat exchanger module may be held together in different ways. In one example, the part of a modular heat exchanger module are held together by a friction coupling between the parts and the sealings. It is also possible to provide the sleeves and/or the receiving openings with some kind of locking features, such that the parts can snap together. Internal or external clips may also be used. The same applies when attaching modular heat exchanger modules to each other. Since the main purpose of the invention is not to replace a radiator in a regular, high-volume truck, but to be used in stationary applications or in vehicles that are not exposed for large vibrations or that travels on bad roads, it may be sufficient to hold the parts together with friction force.

In one example, the first end part and the second end part are identical and are made in the same tooling, e.g. injection moulded in the same plastic tool. In this case, the inlet opening of the first end part equals the outlet opening of the second end part, the first outlet opening of the first end part equals the second inlet opening of the second end part and the second outlet opening of the first end part equals the first inlet opening of the second end part. In this way, a cost-effective modular system is provided. The first radiator section and the second radiator section are also the same and are identical. In this way, a modular heat exchanger module can be assembled by using only three different part numbers, and a complete radiator having any size can be assembled by three different part numbers. This will allow for flexible cooling systems adapted to the actual use of the power source.

By using such modular heat exchanger modules in a cooling system, it is easy to replace a radiator section when a radiator section is damaged, instead of having to replace the complete heat exchanger, or to remove the complete heat exchanger for repair.

In one example, a first end part is provided with an additional outlet opening for attaching a radiator section. The additional opening may be arranged perpendicular to the first outlet opening, and will allow radiator sections to be attached to the first end section in two directions, e.g. with a 90 degree angle. This may be advantageous for saving space.

In a cooling system for a power source, the cooling system comprises a modular heat exchanger comprising at least one modular heat exchanger module, an inlet tubing for transferring heated cooling liquid from the power source to the cooling system, an outlet tubing for transferring cooled cooling liquid to the power source, and an expansion vessel for compensating for pressure changes in the cooling system. The number of modular heat exchanger modules is selected in dependency of the rated power of the power source and on the anticipated use of the power source.

The cooling system may also comprise a buffer tank arranged in the outlet tubing between the modular heat exchanger and the power source, downstream of the modular heat exchanger. The size of the buffer tank is selected in dependency of the anticipated use of the power source, and will act as a heat buffer for short high load conditions. The buffer tank will increase the volume of the cooling system such that it will take a longer time to overheat the cooling liquid. When the power source is only used for short durations, the buffer tank will allow for a smaller heat exchanger, which will save cost and space.

The cooling system further comprises a fan electronic control unit (FECll). The FECll receives the regular control signal from the power source, e.g. the combustion engine, which is an on/off signal that normally starts or stops the radiator fan of a regular cooling system. This control signal is normally sent by a temperature sensor positioned at the cooling liquid outlet of the combustion engine. The FECll is arranged to control one or more cooling fans of the cooling system. The FECll may also receive more input signals, such as the temperature measured at the outlet of the heat exchanger, the ambient temperature or the temperature in the buffer tank. The FECll may control the cooling fan in a simple on/off mode, in a three state mode on/medium/off or can control the speed of the cooling fan continuously from zero to full speed.

The FECll is arranged to adapt to the number of cooling fans such that the same FECll can be used regardless of the number of modular heat exchanger modules used in the cooling system. The FECll is also arranged to control different types of cooling fans. A cooling system may e.g. comprise heat exchangers that are adapted to cool different parts of a power system. In a combustion engine system, one heat exchanger may be used to the engine cooling, one heat exchanger may be used for the charge air cooler, and one heat exchanger may be used for the climate control. The FECll can control the fans of these different heat exchangers, where the size and type of the fans may vary. Some fans may be controlled with a DC signal and some fans may be controlled with a PWM signal. BRIEF DESCRIPTION OF DRAWINGS

The invention will be described in greater detail in the following, with reference to the attached drawings, in which

Fig. 1 shows a schematic vehicle provided with a modular heat exchanger according to the invention,

Fig. 2 shows an example of a modular heat exchanger,

Figs. 3a-d show a first example of a modular heat exchanger module,

Figs. 4a-d show a second example of a modular heat exchanger module, and

Fig. 5 shows a schematic example of a fan electronic control unit.

MODES FOR CARRYING OUT THE INVENTION

The embodiments of the invention with further developments described in the following are to be regarded only as examples and are in no way to limit the scope of the protection provided by the patent claims.

Fig.1 shows a vehicle 100 provided with a cooling system 50 comprising a modular heat exchanger 51. The shown vehicle is powered by a power source 101 , in the shown example an internal combustion engine. The power source may also be an electric motor or a power cell. Regardless of the used power source, the power source will produce excessive heat that needs to be removed by the cooling system 50. The cooling system may be mounted on a vehicle, as shown in Fig. 1 , or may be used in a stationary power installation, e.g. for pumps or power generators.

The cooling system 50 comprises a modular heat exchanger 51 , an inlet tubing 56, an outlet tubing 57 and an expansion vessel 58. The inlet tubing is connected to the outlet port of the power source and forwards the heated cooling liquid from the power source to the heat exchanger. The outlet tubing is connected to the inlet port of the power source and forwards the cooled cooling liquid from the heat exchanger to the power source. The expansion vessel will compensate for pressure changes in the cooling system. The modular heat exchanger 51 consists of one or more modular heat exchanger modules 1 .

A modular heat exchanger module 1 , as shown in Figs. 3a-3d, comprises a first end part 2, a first radiator section 18 and a second end part 10. The first end part 2 is provided with an inlet opening 3, a first outlet opening 6 and a second outlet opening 9. In the shown example, the inlet opening 3 is provided with a protruding sleeve 4 having a sealing 5. The inlet opening is adapted to be connected to an inlet tubing or to a second outlet opening of another first end part. The first outlet opening 6 is provided with a protruding sleeve 7 having a sealing 8. The first radiator section 18 is provided with an inlet opening 19 and an outlet opening 20. The cross section of the first radiator section is preferably rectangular. The inlet opening and the outlet opening are preferably identical, such that the mounting direction of the first radiator section is not critical. This makes it easier to assemble a modular heat exchanger and simplifies the exchange of a damaged radiator section. The inlet opening 19 is dimensioned to cooperate with the first outlet opening 6 of the first end part, such that a releasable and water tight connection between the first end part and the first radiator section is obtained.

The second end part 10 is provided with a first inlet opening 11 , a second inlet opening 14 and an outlet opening 15. The first inlet opening 11 is provided with a protruding sleeve 12 having a sealing 13. The second outlet opening 15 is provided with a protruding sleeve 16 having a sealing 17. The first inlet opening 11 is adapted to cooperate with the outlet opening 20 of the first radiator section, such that a releasable and watertight connection between the second end part and the first radiator section is obtained. The outlet opening 15 is adapted to be connected to an outlet tubing or to second inlet opening of another second end part.

The first end part and the second end part are preferably identical. This reduces the number of part numbers and reduces cost and storage. In this case, the inlet opening 3 of the first end part corresponds to the outlet opening 15 of the second end part, the first outlet opening 6 of the first end part corresponds to the first inlet opening 11 of the second end part, and the second outlet opening 9 of the first end part corresponds to the second inlet opening 14 of the second end part.

A modular heat exchanger modules also comprises an end cap 31 adapted to be inserted in the second outlet opening 9 of the first end part 2 and/or the second inlet opening 14 of the second end part 10. The end cap is in the shown example a separate part provided with a sealing 32 adapted to provide a watertight connection to a first end part and a second end part. It is also possible to block the second outlet opening 9 and the second inlet opening 14 in the production tool, such that the end cap is not necessary. This will instead mean that two different end parts are necessary, which creates a further part number for an end part.

A modular heat exchanger module 1 consists of a first end part 2 releasbly connected to a first radiator section 18, which is releasbly connected to a second end part 10. The modular heat exchanger module may be held together in different ways. In one example, the parts of the modular heat exchanger module are held together by the friction coupling between the parts and the sealings. It is also possible to provide the sleeves and/or the receiving openings with some kind of locking features, such that the parts can snap together. Internal or external clips may also be used. The same applies when attaching modular heat exchanger modules to each other. The cooling system is primarily intended to be used in stationary installations or in vehicles that are not exposed to large vibrations. It may thus be sufficient to hold the parts together with friction force. It is also possible to attach the different parts with e.g. external clips or screws.

In another example, as shown in Figs. 4a-4d, a modular heat exchanger module also comprises an intermediate part 24 and a second radiator section 21. The intermediate part is provided with an inlet opening 25 and an outlet opening 28. The inlet opening 25 is provided with a protruding sleeve 26 having a sealing 27, and the outlet opening 28 is provided with a protruding sleeve 29 having a sealing 30. The second radiator section 21 is provided with an inlet opening 22 and an outlet opening 23. The cross section of the second radiator section is preferably rectangular. The inlet opening and the outlet opening are preferably identical, such that the mounting direction of the second radiator section is not critical. The first radiator section 18 and the second radiator section 21 are preferably identical, such that they may be interchanged, which reduces the part numbers of a modular heat exchanger module.

In this example, a modular heat exchanger module will consist of a first end part 2 releasably connected to a first radiator section 18, which is releasably connected to an intermediate part 24, which is releasably connected to a second radiator section 21 , which is releasably connected to a second end part 10. It is also possible to connect more than two radiator sections in series in a modular heat exchanger module, by using more intermediate parts and radiator sections, such that the effective radiator surface can be increased. Heat exchanger modules can also be assembled in parallel, such that the effective radiator surface can be further increased if required. In this case, several first end parts are attached to each other, where a second outlet opening 9 of a first end part 2 is attached to an inlet opening 3 of another first end part 2, and several second end parts are attached to each other, where an outlet opening 15 of a second end part 10 is attached to a second inlet opening 14 of another second end part 10. In one example, a first end part is also provided with an additional outlet opening for attaching a radiator section. The additional opening may be arranged perpendicular to the first outlet opening, and will allow radiator sections to be attached to the first end section in two directions, e.g. with a 90 degree angle. This may be advantageous for saving space. The additional outlet opening is identical to the first outlet opening 6, and is also provided with a protruding sleeve having a sealing such that it can be releasably attached to a radiator section.

Fig 2 shows an example of a cooling system 50 where a modular heat exchanger 51 consists of four modular heat exchanger modules, a first modular heat exchanger module 52, a second modular heat exchanger module 53, a third modular heat exchanger module 54 and a fourth modular heat exchanger module 55. Each modular heat exchanger module is provided with at least one cooling fan 33, in the shown example two cooling fans 33, arranged in a shroud 34. The shroud covers the complete surface of a radiator section, such that the fan controls the complete airflow through the radiator section. It would also be possible to arrange a larger cooling fan over e.g. two parallel modular heat exchanger modules, with the shroud covering both radiator sections.

The cooling fans 33 are controlled by a fan electronic control unit (FECll) 61 that is adapted to control each cooling fan individually. The fan electronic control unit 61 adapts to the number of used modular heat exchanger modules, i.e. to the number of connected cooling fans, and controls the cooling fans in a predefined manner. The fan electronic control unit receives a fan control signal from the power source and controls the cooling fans in dependency of the fan control signal. The fan control signal sent from a power source such as an internal combustion engine is normally an on/off signal used to turn the cooling fan on or off in a regular cooling system. The FECll may also receive other input signals, such as a temperature value from a temperature sensor. The temperature sensor may e.g. measure the temperature at the outlet of the heat exchanger, the ambient temperature or the temperature in the buffer tank. The FECll may control the cooling fan in a simple on/off mode, in a three state mode on/medium/off or can control the speed of the cooling fan continuously from zero to full speed. A temperature sensor may e.g. be positioned at the outlet of the modular heat exchanger to measure the actual temperature of the cooling liquid flowing from the heat exchanger such that the FECll can control the cooling fans according to the actual conditions. This will allow the FECll to adapt to the actual cooling needs of the power source.

One advantage of the inventive modular heat exchanger is that it can be assembled from any number of modular heat exchanger modules, where the modular heat exchanger modules may comprise one or more radiator sections. In this way, a heat exchanger adapted to the actual cooling needs of the power source can be obtained, depending on how the power source is used.

In one example, the power source is used in a stationary installation powering a pump. The pump runs constantly at a predefined speed, such that the power output from the power source is relatively constant. This means that the required cooling for the power source is relatively constant, and will mostly vary with the ambient temperature. In this case, the size of the modular heat exchanger can be dimensioned for the actual used power of the power source, and must not be dimensioned for the maximum output power that the power source can deliver. The power source may e.g. be an internal combustion engine running at half the maximum speed.

In another example, the power source is an internal combustion engine (ICE) mounted on a vehicle handling containers. The vehicle will lift a container and will then transport the container to a new location, where it is unloaded. The lifting of a loaded container may require full power from the ICE for a short time, whereas the transporting of the container requires only a small fraction of the full power. In this case, the heat exchanger can be dimensioned to allow the temperature of the cooling system to exceed the maximal allowed temperature for a short interval, since the FECll knows the temperature behaviour of the cooling liquid. During the lifting of the container, the FECll can control the cooling fans to run at maximal speed during the lifting action. In this way, the cooling liquid will be cooled to a lower temperature than normal at the beginning of the lifting action, which allows the cooling liquid to collect more heat when the power source runs at full power. In this case, the FECll receives a signal corresponding to the engine speed.

It one example, the cooling system is also provided with a buffer tank 59 arranged downstream of the modular heat exchanger. The buffer tank 59 may be provided with a temperature sensor 60 that sends a temperature value to the FECll. The buffer tank will increase the heat capacity of the cooling system, such that the cooling liquid can absorb short heat bursts from the power source without overheating the cooling system. Using a buffer tank may allow the cooling system to use a reduced number of radiator sections in power installations where the power source is used intermittent, with short intervals of maximum power between longer periods of low power output. One such example is the above described container handling vehicle. With a buffer tank, the modular heat exchanger can be dimensioned for the low power output case, and the buffer tank will absorb the heat created during the maximum power output. This will save both cost and space. The volume of the buffer tank is in one example 50% of the total volume of the cooling system, but may be up to 75% of the total volume.

The FECU is arranged to adapt to the number of cooling fans such that the same FECU can be used regardless of the number of modular heat exchanger modules used in the cooling system. The FECU is also arranged to control different types of cooling fans. A cooling system may e.g. comprise heat exchangers that are adapted to cool different parts of a power system. In a combustion engine system, one heat exchanger may be used to the engine cooling, one heat exchanger may be used for the charge air cooler, and one heat exchanger may be used for the climate control. The FECll can control the fans of these different heat exchangers, where the size and type of the fans may vary. Some fans may be controlled with a DC signal and some fans may be controlled with a PWM signal.

The invention is not to be regarded as being limited to the embodiments described above, a number of additional variants and modifications being possible within the scope of the subsequent patent claims.

REFERENCE SIGNS

1 : Modular heat exchanger module

2: First end part

3: Inlet opening

4: Sleeve

5: Sealing

6: First outlet opening

7: Sleeve

8: Sealing

9: Second outlet opening

10: Second end part

11 : First inlet opening

12: Sleeve

13: Sealing

14: Second inlet opening

15: Outlet opening

16: Sleeve

17: Sealing

18: First radiator section

19: Inlet opening

20: Outlet opening

21 : Second radiator section

22: Inlet opening

23: Outlet opening

24: Intermediate part

25: Inlet opening

26: Sleeve

27: Sealing

28: Outlet opening

29: Sleeve

30: Sealing

31 : End cap

32: Sealing

33: Fan

34: Shroud 50: Cooling system

51 : Modular heat exchanger

52: First modular heat exchanger module

53: Second modular heat exchanger module 54: Third modular heat exchanger module

55: Fourth modular heat exchanger module

56: Inlet tubing

57: Outlet tubing

58: Expansion vessel 59: Buffer tank

60: Temperature sensor

61 : Fan electronic control unit

100: Vehicle 101 : Power source

Claims

1. A modular heat exchanger module (1 ) for a power source (101 ) comprising a first end part (2), a first radiator section (18) and a second end part (10), where the first end part (2) is provided with an inlet opening (3) and a first outlet opening (6), where the second end part (10) is provided with a first inlet opening (11 ) and an outlet opening (15), where the first outlet opening (6) of the first end part (2) is connected to an inlet opening (19) of the first radiator section (18), where an outlet opening (20) of the first radiator section (18) is connected to the first inlet opening (11 ) of the second end part

(10), c h a r a c t e r i z e d i n that the first end part (2) is releasably connected to the first radiator section (18) and that the first radiator section (18) is releasably connected to the second end part (10).

2. Modular heat exchanger module according to claim 1 , wherein the modular heat exchanger module further comprises an intermediate part (24) and a second radiator section (21 ), where the outlet opening (20) of the first radiator section (18) is connected to an inlet opening (25) of the intermediate part (24), where an outlet opening (28) of the intermediate part (24) is connected to an inlet opening (22) of the second radiator section (21 ) and where an outlet opening (23) of the second radiator section (21 ) is connected to the first inlet opening

(11 ) of the second end part (10), where the first radiator section (18) is releasably connected to the intermediate part (24), that the intermediate part (24) is releasably connected to the second radiator section (21 ) and that the second radiator section (21 ) is releasably connected to the second end part (10).

3. Modular heat exchanger module according to claim 1 or 2, wherein the first end part (2) comprises a second outlet opening (9) and that the second end part (10) comprises a second inlet opening (14). Modular heat exchanger module according to claim 3, wherein the modular heat exchanger module further comprises an end cap (31 ) adapted to be inserted in the second outlet opening (9) of the first end part (2) and/or the second inlet opening (12) of the second end part (10). Modular heat exchanger module according to claim 3 or 4, wherein the second outlet opening (9) of the first end part (2) is adapted to be connected to the inlet opening (3) of another first end part (2) and that the second inlet opening (12) of the second end part (10) is adapted to be connected to the outlet opening (15) of another second end part (10). Modular heat exchanger module according to any of claims 1 to 5, wherein the inlet opening (3) of the first end part (2) is provided with a protruding sleeve (4) having a sealing (5), and that the first outlet opening (6) of the first end part (2) is provided with a protruding sleeve (7) having a sealing (8). Modular heat exchanger module according to any of claims 1 to 6, wherein the first inlet opening (11 ) of the second end part (10) is provided with a protruding sleeve (12) having a sealing (13), and that the outlet opening (15) of the second end part (10) is provided with a protruding sleeve (16) having a sealing (17). Modular heat exchanger module according to any of claims 1 to 7, wherein the first end part (2) and the second end part (10) are identical, such that the inlet opening (3) of the first end part (2) corresponds to the outlet opening (15) of the second end part (10), and that the first outlet opening (6) of the first end part (2) corresponds to the first inlet opening (11 ) of the second end part (10). Modular heat exchanger module according to any of claims 2 to 8, wherein the inlet opening (25) of the intermediate part (24) is provided with a protruding sleeve (26) having a sealing (27), and that the outlet opening (28) of the intermediate part (24) is provided with a protruding sleeve (29) having a sealing (30). Modular heat exchanger module according to any of claims 2 to 9, wherein the first radiator section (18) comprises at least one radiator fan (33) and the second radiator section (21 ) comprises at least one radiator fan (33). Modular heat exchanger module according to any of claims 2 to 10, wherein a first radiator section (18) and/or a second radiator section (21 ) can be replaced by disassembling the modular heat exchanger module (1 ) and assembling the modular heat exchanger module (1 ) with a new first radiator section (18) and/or a new second radiator section (21 ). Modular heat exchanger (51 ) comprising at least two modular heat exchanger modules (1 ) according to any of claim 3 to 11 , wherein a second outlet opening (9) of a first end part (2) of a first modular heat exchanger module (52) is connected to an inlet opening (3) of a first end part (2) of a second modular heat exchanger module (53), and that an outlet opening (15) of the first modular heat exchanger module (52) is connected to a second inlet opening (14) of the second end part (10) of the second modular heat exchanger module (53). Cooling system (50) for a power source, comprising a modular heat exchanger (51 ) according to claim 12, an inlet tubing (56), an outlet tubing (57) and an expansion vessel (58). Cooling system according to claim 13, wherein the cooling system (50) further comprises a buffer tank (59).

15. Vehicle, comprising a cooling system (50) according to any of claims

12 to 14.