Integrated engine heat exchange system and ship

Abstract

The present invention relates to the field of engine technology, and more particularly to an integrated engine heat exchange system, comprising an integrated heat exchanger, an intercooler, a lubricating oil heat exchanger, a cooling assembly for an engine assembly, a primary circulation pipeline, and a secondary circulation pipeline. The engine assembly comprises a cylinder head, a cylinder liner, a supercharger, and an exhaust manifold. The heat release end of the integrated heat exchanger comprises a primary heat exchange pipeline and a secondary heat exchange pipeline. The primary circulation pipeline is provided with an intercooler and a lubricating oil heat exchanger. The outlet of the primary circulation pipeline is connected to the inlet of the primary heat exchange pipeline, and the inlet of the primary circulation pipeline is connected to the outlet of the primary heat exchange pipeline. The cooling assembly is provided on the secondary circulation pipeline, and the outlet of the secondary circulation pipeline is connected to the inlet of the secondary heat exchange pipeline, and the inlet of the secondary circulation pipeline is connected to the outlet of the secondary heat exchange pipeline. The present invention also provides a ship comprising the above-mentioned integrated engine heat exchange system.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to an integrated engine heat exchange system and a ship. Background Art

[0002] Existing engine cooling systems operate separately for high-temperature and low-temperature circulation to ensure that the cooling water for marine engines maintains an optimal operating temperature. However, existing cooling circulation systems utilize multiple single-unit heat exchangers, which take up a lot of space, are costly, complex, and require extensive on-site installation.

[0003] Therefore, there is an urgent need for an integrated engine heat exchange system and a ship to solve the above problems. Summary of the Invention

[0004] An object of the present invention is to provide an integrated engine heat exchange system that can reduce occupied space, reduce costs, and simplify structure and installation process.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Provided is an integrated engine heat exchange system, comprising an integrated heat exchanger, an intercooler, a lubricating oil heat exchanger, a cooling assembly of an engine assembly, a primary circulation pipeline and a secondary circulation pipeline. The engine assembly comprises a cylinder head, a cylinder liner, a supercharger and an exhaust manifold. The heat release end of the integrated heat exchanger comprises a primary heat exchange pipeline and a secondary heat exchange pipeline. A first heat exchange medium circulates in the primary circulation pipeline, and a second heat exchange medium circulates in the secondary circulation pipeline. The intercooler and the lubricating oil heat exchanger are provided on the primary circulation pipeline. The outlet of the primary circulation pipeline is connected to the inlet of the primary heat exchange pipeline, and the inlet of the primary circulation pipeline is connected to the outlet of the primary heat exchange pipeline. The cooling assembly is provided on the secondary circulation pipeline. The outlet of the secondary circulation pipeline is connected to the inlet of the secondary heat exchange pipeline, and the inlet of the secondary circulation pipeline is connected to the outlet of the secondary heat exchange pipeline.

[0007] As a preferred solution of the integrated engine heat exchange system, the cooling medium in the cooling end of the integrated heat exchanger exchanges heat with the first heat exchange medium in the primary heat exchange pipeline and the second heat exchange medium in the secondary heat exchange pipeline in sequence.

[0008] As a preferred solution of the integrated engine heat exchange system, it also includes a first-level temperature regulator, which is arranged on the first-level circulation pipeline, the first inlet of the first-level temperature regulator is connected to the outlet of the first-level heat exchange pipeline, the second inlet of the first-level temperature regulator is connected to the downstream pipeline of the intercooler and the lubricating oil heat exchanger, and the outlet of the first-level temperature regulator is connected to the upstream pipeline of the intercooler and the lubricating oil heat exchanger.

[0009] As a preferred solution of the integrated engine heat exchange system, it also includes a secondary temperature regulator, which is arranged on the secondary circulation pipeline, the inlet of the secondary temperature regulator is connected to the outlet of the secondary heat exchange pipeline, the first outlet of the secondary temperature regulator is connected to the upstream pipeline of the cylinder head, the cylinder liner, the supercharger and the cooling component, and the second outlet of the secondary temperature regulator is connected to the inlet of the secondary heat exchange pipeline.

[0010] As a preferred solution of the integrated engine heat exchange system, it also includes an expansion tank, the first heat exchange medium and the second heat exchange medium are the same substance, and the expansion tank is connected to both the primary heat exchange pipeline and the secondary heat exchange pipeline.

[0011] As a preferred solution of the integrated engine heat exchange system, it also includes a primary pump and a secondary pump. The primary pump is arranged on the primary heat exchange pipeline, and the secondary pump is arranged on the secondary heat exchange pipeline.

[0012] As a preferred solution of the integrated engine heat exchange system, along the flow direction of the first heat exchange medium, the primary pump, the intercooler and the lubricating oil heat exchanger are connected in sequence.

[0013] As a preferred solution of the integrated engine heat exchange system, the cooling medium is seawater.

[0014] As a preferred solution of the integrated engine heat exchange system, the temperature range of the first heat exchange medium is 45°C-55°C, and the temperature range of the second heat exchange medium is 75°C-85°C.

[0015] Another object of the present invention is to provide a ship that can reduce the space occupied by the engine heat exchange system, reduce costs, and simplify the structure and installation process.

[0016] To achieve this object, the present invention adopts the following technical solutions:

[0017] Provided is a ship comprising the above-mentioned integrated engine heat exchange system.

[0018] Beneficial effects of the present invention:

[0019] The present invention provides an integrated engine heat exchange system, comprising an integrated heat exchanger, an intercooler, a lubricating oil heat exchanger, a cooling component of an engine component, a primary circulation pipeline and a secondary circulation pipeline. The engine component comprises a cylinder head, a cylinder liner, a supercharger and an exhaust manifold. The heat release end of the integrated heat exchanger comprises a primary heat exchange pipeline and a secondary heat exchange pipeline. A first heat exchange medium circulates in the primary circulation pipeline, and a second heat exchange medium circulates in the secondary circulation pipeline. An intercooler and a lubricating oil heat exchanger are provided on the primary circulation pipeline. The outlet of the primary circulation pipeline is connected to the inlet of the primary heat exchange pipeline, and the inlet of the primary circulation pipeline is connected to the outlet of the primary heat exchange pipeline. A cooling component is provided on the secondary circulation pipeline. The outlet of the secondary circulation pipeline is connected to the inlet of the secondary heat exchange pipeline, and the inlet of the secondary circulation pipeline is connected to the outlet of the secondary heat exchange pipeline. Specifically, the first heat exchange medium acts as a coolant for the intercooler and lubricating oil heat exchanger, transferring heat to the heat absorption end of the integrated heat exchanger. The second heat exchange medium acts as a coolant for the cylinder head, cylinder liner, supercharger, and exhaust manifold, also transferring heat to the heat absorption end of the integrated heat exchanger. This integrated engine heat exchange system eliminates the need for multiple heat exchangers, reducing space and costs, and simplifying the structure and installation process.

[0020] The present invention provides a ship comprising the above-mentioned integrated engine heat exchange system. The integrated engine heat exchange system of the ship can reduce occupied space, reduce costs, and simplify structure and installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of an integrated engine heat exchange system provided by an embodiment of the present invention;

[0022] Figure 2 Schematic diagram of an integrated heat exchanger provided in an embodiment of the present invention.

[0023] In the picture:

[0024] 1. Integrated heat exchanger; 2. Intercooler; 3. Lubricating oil heat exchanger; 4. Cooling assembly; 5. Primary pump; 6. Secondary pump; 7. Cooling medium pump; 8. Primary circulation pipeline; 9. Secondary circulation pipeline; 10. Primary temperature regulator; 11. Secondary temperature regulator; 12. Expansion tank;

[0025] 700, first heat exchange medium; 800, second heat exchange medium; 900, cooling medium. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only show portions relevant to the present invention, not all of them.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] like Figure 1 As shown, the integrated engine heat exchange system of this embodiment includes an integrated heat exchanger 1, an intercooler 2, a lubricating oil heat exchanger 3, an engine assembly cooling assembly 4, a primary circulation pipeline 8, and a secondary circulation pipeline 9. The engine assembly cooling assembly 4 includes the cooling components 4 for the cylinder head, cylinder liner, supercharger, and exhaust manifold. The heat release end of the integrated heat exchanger 1 includes a primary heat exchange pipeline and a secondary heat exchange pipeline. A first heat exchange medium 700 circulates in the primary circulation pipeline 8, and a second heat exchange medium 800 circulates in the secondary circulation pipeline 9.

[0030] The primary circulation line 8 is provided with an intercooler 2 and a lubricating oil heat exchanger 3. The outlet of the primary circulation line 8 is connected to the inlet of the primary heat exchange line, and the inlet of the primary circulation line 8 is connected to the outlet of the primary heat exchange line. The secondary circulation line 9 is provided with a cooling assembly 4. The outlet of the secondary circulation line 9 is connected to the inlet of the secondary heat exchange line, and the inlet of the secondary circulation line 9 is connected to the outlet of the secondary heat exchange line.

[0031] The first heat exchange medium 700 acts as a coolant for the intercooler 2 and the lubricating oil heat exchanger 3, transferring heat to the heat-absorbing end of the integrated heat exchanger 1. The second heat exchange medium 800 acts as a coolant for the cylinder head, cylinder liner, supercharger, and exhaust manifold, similarly transferring heat to the heat-absorbing end of the integrated heat exchanger 1. This achieves heat exchange requirements without requiring multiple heat exchangers, reducing space, lowering costs, and simplifying the structure and installation process.

[0032] In order to adapt to the different cooling needs of the intercooler 2, the lubricating oil heat exchanger 3, the cylinder head, the cylinder liner, the supercharger, and the exhaust manifold, preferably, the temperature range of the first heat exchange medium 700 is 45°C-55°C, and the temperature range of the second heat exchange medium 800 is 75°C-85°C.

[0033] like Figure 2 As shown, preferably, the cooling medium 900 in the cooling end of the integrated heat exchanger 1 first exchanges heat with the first heat exchange medium 700 in the primary heat exchange pipeline with a lower temperature, and then exchanges heat with the second heat exchange medium 800 in the secondary heat exchange pipeline with a higher temperature. This not only improves the heat exchange efficiency, but also reduces the stress on the plate caused by excessive temperature difference.

[0034] Preferably, the cooling medium 900 is seawater. In order to provide power for the flow of seawater, preferably, a cooling medium pump 7 is provided on the pipeline before the cooling medium 900 enters the integrated heat exchanger 1 .

[0035] Preferably, the discharge pipes of the primary and secondary heat exchange pipes of the integrated heat exchanger 1 flow in the same direction. This arrangement helps suppress flow-induced vibration. Preferably, the cooling medium 900, the first heat exchange medium 700, and the second heat exchange medium 800 in the integrated heat exchanger 1 all exchange heat in countercurrent flow, which improves heat exchange efficiency while also reducing pressure drop and local thermal stress in the integrated heat exchanger 1.

[0036] To prevent the first heat exchange medium 700 from becoming too cold after heat exchange in the integrated heat exchanger 1, thereby causing overcooling of the primary circulation pipeline 8, increasing the temperature difference between various parts of the heated components, and generating significant thermal stress, the integrated engine heat exchange system preferably further includes a primary temperature regulator 10. Specifically, the primary temperature regulator 10 is disposed on the primary circulation pipeline 8, with a first inlet of the primary temperature regulator 10 connected to the outlet of the primary heat exchange pipeline, a second inlet of the primary temperature regulator 10 connected to the downstream pipeline of the intercooler 2 and the lubricating oil heat exchanger 3, and an outlet of the primary temperature regulator 10 connected to the upstream pipeline of the intercooler 2 and the lubricating oil heat exchanger 3.

[0037] To precisely regulate the temperature and prevent the second heat exchange medium 800 entering the integrated heat exchanger 1 from becoming overheated, which could cause excessive local thermal stress and damage the service life of the integrated heat exchanger 1, the integrated engine heat exchange system preferably further includes a secondary temperature regulator 11. Specifically, the secondary temperature regulator 11 is disposed on the secondary circulation pipeline 9, with the inlet of the secondary temperature regulator 11 connected to the outlet of the secondary heat exchange pipeline, the first outlet of the secondary temperature regulator 11 connected to the upstream pipeline of the cooling assembly 4, and the second outlet of the secondary temperature regulator 11 connected to the inlet of the secondary heat exchange pipeline.

[0038] In order to ensure the stability of the pressure in the two circulation pipelines, preferably, the integrated engine heat exchange system also includes an expansion tank 12, the first heat exchange medium 700 and the second heat exchange medium 800 are the same substance, and the expansion tank 12 is connected to both the primary heat exchange pipeline and the secondary heat exchange pipeline.

[0039] Preferably, the first heat exchange medium 700 and the second heat exchange medium 800 are both fresh water, so there is no need to worry about leakage of the inner cavity of the integrated heat exchanger 1 causing the two heat exchange media to cross-cavity, and the reliability is high.

[0040] To provide flow momentum for the fluids in the two circulation lines, the integrated engine heat exchange system preferably also includes a primary pump 5 and a secondary pump 6. The primary pump 5 is disposed on the primary heat exchange line, and the secondary pump 6 is disposed on the secondary heat exchange line. Preferably, the primary pump 5, intercooler 2, and lubricating oil heat exchanger 3 are sequentially connected along the flow direction of the first heat exchange medium 700. The secondary pump 6 is disposed upstream of the cooling assembly 4 of the engine assembly.

[0041] When the engine is started under low load and cold conditions, since the temperature of the first heat exchange medium 700 is around 50°C, the intercooler 2 and the lubricating oil heat exchanger 3 will be heated by the first heat exchange medium 700 to increase the working temperature of the working fluid, making it easier to start the diesel engine. At the same time, the low-temperature lubricating oil is properly heated, which is conducive to forming an oil film, reducing friction losses, shortening the warm-up time, and thus improving the mechanical efficiency of the diesel engine.

[0042] The integrated engine heat exchange system includes an integrated heat exchanger 1 and two temperature regulators, which can meet the working requirements of different heat exchange amounts of the diesel engine cooling system and has the characteristics of high integration, high integration molding, high modularity, high structural stability and low cost.

[0043] Furthermore, by reducing the number of heat exchangers, the equipment support issue is effectively resolved, reducing system weight, saving energy and reducing consumption, and offering the advantage of high integration. This high integration helps reduce the footprint of the integrated engine heat exchange system, providing more space for engine compartment design. Furthermore, the highly integrated system facilitates subsequent management and maintenance.

[0044] Not only that, the integrated engine heat exchange system can also save the water supply and drainage pipes required to connect the heat exchanger and the heated parts in the existing system layout, thereby reducing the system construction cost, on-site installation workload and subsequent maintenance costs, while also helping to increase the structural stability of the system and improve the sensitivity of the unit control.

[0045] Existing systems use seawater to cool freshwater and the air within the diesel engine soundproof enclosure. A seawater pump, located at the free end, draws seawater from an outboard seawater tank through a filter and delivers it via pipelines to a freshwater cooler or other associated coolers. The cooled seawater is then collected and discharged overboard. Because seawater can easily cause scale and silt to form in the inlet and outlet pipes and in the freshwater cooler or other associated coolers, affecting heat transfer, and seawater is highly corrosive to metal materials, minimizing the seawater's flow path helps improve system reliability and service life. The integrated heat exchanger 1 provided in this embodiment cools freshwater from two circulation pipes only within the integrated heat exchanger 1. This eliminates the need for seawater to be delivered to the freshwater cooler or other associated coolers through pipelines. This shortens the seawater's travel in the system, effectively suppressing scale and silt accumulation in the inlet and outlet pipes, and eliminating corrosion to the freshwater cooler or other associated coolers, thereby significantly improving the system's heat exchange efficiency and reliability.

[0046] This embodiment further provides a ship, comprising the above-mentioned integrated engine heat exchange system. The integrated engine heat exchange system of the ship can reduce occupied space, reduce costs, and simplify the structure and installation process.

[0047] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Integrated engine heat exchange system, characterized in that: The invention comprises an integrated heat exchanger (1), an intercooler (2), a lubricating oil heat exchanger (3), a cooling assembly (4) of an engine assembly, a primary circulation pipeline (8) and a secondary circulation pipeline (9), wherein the engine assembly comprises a cylinder head, a cylinder liner, a supercharger and an exhaust manifold, a heat release end of the integrated heat exchanger (1) comprises a primary heat exchange pipeline and a secondary heat exchange pipeline, a first heat exchange medium (700) circulates in the primary circulation pipeline (8), and a second heat exchange medium (800) circulates in the secondary circulation pipeline (9), The intercooler (2) and the lubricating oil heat exchanger (3) are provided on the primary circulation pipeline (8), the outlet of the primary circulation pipeline (8) is connected to the inlet of the primary heat exchange pipeline, and the inlet of the primary circulation pipeline (8) is connected to the outlet of the primary heat exchange pipeline, the cooling assembly (4) is provided on the secondary circulation pipeline (9), the outlet of the secondary circulation pipeline (9) is connected to the inlet of the secondary heat exchange pipeline, and the inlet of the secondary circulation pipeline (9) is connected to the outlet of the secondary heat exchange pipeline; The cooling medium (900) in the cooling end of the integrated heat exchanger (1) sequentially exchanges heat with the first heat exchange medium (700) in the primary heat exchange pipeline and the second heat exchange medium (800) in the secondary heat exchange pipeline.

2. The integrated engine heat exchange system according to claim 1, characterized in that: The invention also includes a first-stage temperature regulator (10), which is arranged on the first-stage circulation pipeline (8), a first inlet of the first-stage temperature regulator (10) is connected to the outlet of the first-stage heat exchange pipeline, a second inlet of the first-stage temperature regulator (10) is connected to the downstream pipelines of the intercooler (2) and the lubricating oil heat exchanger (3), and an outlet of the first-stage temperature regulator (10) is connected to the upstream pipelines of the intercooler (2) and the lubricating oil heat exchanger (3).

3. The integrated engine heat exchange system according to claim 1, characterized in that: The invention also includes a secondary temperature regulator (11), which is arranged on the secondary circulation pipeline (9), the inlet of the secondary temperature regulator (11) is connected to the outlet of the secondary heat exchange pipeline, the first outlet of the secondary temperature regulator (11) is connected to the upstream pipeline of the cooling component (4), and the second outlet of the secondary temperature regulator (11) is connected to the inlet of the secondary heat exchange pipeline.

4. The integrated engine heat exchange system according to claim 1, characterized in that: It also includes an expansion tank (12), the first heat exchange medium (700) and the second heat exchange medium (800) are the same substance, and the expansion tank (12) is connected to both the primary heat exchange pipeline and the secondary heat exchange pipeline.

5. The integrated engine heat exchange system according to any one of claims 1 to 4, characterized in that: It also includes a primary pump (5) and a secondary pump (6), wherein the primary pump (5) is arranged on the primary heat exchange pipeline, and the secondary pump (6) is arranged on the secondary heat exchange pipeline.

6. The integrated engine heat exchange system according to claim 5, characterized in that: Along the flow direction of the first heat exchange medium (700), the primary pump (5), the intercooler (2) and the lubricating oil heat exchanger (3) are connected in sequence.

7. The integrated engine heat exchange system according to claim 1, characterized in that: The cooling medium (900) is seawater.

8. The integrated engine heat exchange system according to any one of claims 1 to 4, characterized in that: The temperature range of the first heat exchange medium (700) is 45°C-55°C, and the temperature range of the second heat exchange medium (800) is 75°C-85°C.

9. A vessel, characterized in that It comprises the integrated engine heat exchange system as described in any one of claims 1-8.

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