Ship tail conformal cooler and ship tail conformal cooling system

Abstract

The present invention relates to the field of ship propulsion technology, and provides a ship stern conformal cooler and a ship stern conformal cooling system. The above-mentioned ship stern conformal cooler comprises: the cooler shell is the ship stern shell, a plurality of heat exchange tubes are arranged in the cooler shell, each heat exchange tube comprises a plurality of bends connected in sequence, and the heat exchange tube can vibrate elastically under the lateral impact of seawater; a plurality of drainage structures are arranged circumferentially on the surface of the first end of the cooler shell, and the inlet of the drainage structure is opposite to the tube body of the heat exchange tube; a plurality of discharge structures are arranged circumferentially on the second end of the cooler shell. The above-mentioned ship stern conformal cooler reduces the resistance of the heat exchange tube to the impact of seawater. Under the impact of seawater, the heat exchange tube can vibrate elastically in an irregular period, thereby preventing marine organisms from attaching to the outer wall of the heat exchange tube and growing, ensuring that the flow channel between two adjacent heat exchange tubes is unobstructed, thereby improving the heat exchange capacity of the heat exchange tube.

Description

Technical Field

[0001] The present invention relates to the technical field of ship power systems, and in particular to a ship stern conformal cooler and a ship stern conformal cooling system. Background Art

[0002] There are a large number of seawater coolers in the ship power system. Traditional ships use decentralized cooling technology, that is, the seawater cooling area is dispersed in the power compartment, and seawater is provided to the cooler through decentralized water supply pipelines. The main disadvantages are as follows: on the one hand, the seawater cooling area occupies a large amount of cabin volume, reducing the effective carrying capacity of the ship; on the other hand, the pipeline system connecting the seawater cooler is prone to damage under the combined effects of long-term sea corrosion, scouring, pressure, etc., resulting in water leakage in the cabin, affecting the safety and reliability of the ship's navigation.

[0003] In response to the above problems, all kinds of new ships currently generally adopt central cooling technology, cooling fresh water through centralized coolers, and then indirectly cooling the original seawater cooler through fresh water, so as to reduce the seawater boundary and improve the reliability of ship operation. However, since the cooling load is discharged outward through a centralized channel in the central cooling system, the central cooling system has a more prominent impact on the reliability of power. The existing technology still has shortcomings in reliability, mainly manifested in that once the organisms in the seawater attach to the tube plate of the centralized cooler, they will block the cooling pipes, resulting in a decrease in the cooling capacity of the entire power system. Summary of the invention

[0004] The present invention provides a ship stern conformal cooler and a ship stern conformal cooling system, which are used to solve the defect in the prior art that organisms in seawater are easily attached to the tube sheet of the cooler, resulting in a decrease in the heat exchange capacity of the cooler.

[0005] The present invention provides a conformal cooler for a ship's stern, comprising: a cooler shell, the cooler shell being a ship's stern shell, a plurality of heat exchange tubes being arranged in the cooler shell, each of the heat exchange tubes comprising a plurality of bends connected in sequence, and the heat exchange tubes being capable of elastically vibrating under the lateral impact of seawater; a plurality of drainage structures, the plurality of drainage structures being circumferentially arranged on the surface of a first end of the cooler shell, the inlet of the drainage structure being opposite to the tube body of the heat exchange tube, the drainage structure being used for introducing seawater into the cooler shell; and a plurality of discharge structures, the plurality of discharge structures being circumferentially arranged on the second end of the cooler shell, and the discharge structure being used for discharging seawater in the cooler shell.

[0006] According to a ship stern conformal cooler provided by the present invention, the heat exchange tube is spiral-shaped.

[0007] According to a ship stern conformal cooler provided by the present invention, the heat exchange tube is wavy.

[0008] A ship stern conformal cooler provided according to the present invention further comprises a plurality of fins, the outer wall of each heat exchange tube is provided with a plurality of the fins, and the end of each fin away from the surface of the heat exchange tube is a pointed end.

[0009] A ship stern conformal cooler provided according to the present invention further includes a plurality of protrusions, and at least one protrusion is provided between every two adjacent fins.

[0010] According to a ship tail wing conformal cooler provided by the present invention, the drainage structure is a first grid, the first grid includes a plurality of first grid plates, the plurality of first grid plates are parallel to each other, each first grid plate is inclined, and the gap between two adjacent first grid plates forms a drainage port, and the drainage port faces the incoming flow direction.

[0011] According to a ship tail wing conformal cooler provided by the present invention, the discharge structure is a second grid, the second grid includes a plurality of second grid plates, the plurality of second grid plates are parallel to each other, each second grid plate is inclined, and the gap between two adjacent second grid plates forms a discharge port, and the discharge port faces away from the incoming flow direction.

[0012] A ship tail fin conformal cooler provided according to the present invention also includes: an inlet header, which is arranged in the cooler shell; an inlet header, which is arranged in the cooler shell, the inlet header is connected to the inlet header, and the inlet header is also connected to the first ends of the plurality of heat exchange tubes.

[0013] A ship tail fin conformal cooler provided according to the present invention also includes: an outlet header, arranged in the cooler shell, the outlet header is connected to the second ends of the plurality of heat exchange tubes; an outlet header, arranged in the cooler shell, the outlet header is connected to the outlet header.

[0014] The present invention also provides a ship stern conformal cooling system, comprising a heat exchanger, a pump and the ship stern conformal cooler as described above, wherein the heat exchanger and the ship stern conformal cooler form a circulation loop, the pump is arranged in the circulation loop, and the pump is used to pump the load of the heat exchanger into the ship stern conformal cooler. Along the forward direction of the ship, the propeller is located in front of the ship stern conformal cooler and is used to push seawater into the ship stern conformal cooler.

[0015] The ship stern conformal cooler provided by the present invention reduces the resistance of the heat exchange tube to the impact of seawater and increases the flexibility of the heat exchange tube by designing the heat exchange tube to have a plurality of curved parts connected in sequence. Under the impact of seawater, the heat exchange tube can undergo irregular elastic vibrations, thereby preventing marine organisms from attaching to and growing on the outer wall of the heat exchange tube, ensuring that the flow channel between two adjacent heat exchange tubes is unobstructed, increasing the contact area between seawater and the heat exchange tube, and thereby improving the heat exchange capacity of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a ship tail fin conformal cooler provided by the present invention;

[0018] Figure 2 is a cross-sectional view of a ship tail fin conformal cooler provided by the present invention;

[0019] Figure 3 yes Figure 2 A cross-sectional view of a heat exchange tube shown in FIG.

[0020] Figure 4 It is a structural schematic diagram of the conformal cooling system of the ship tail fin provided by the present invention;

[0021] Reference numerals:

[0022] 10: heat exchange tube; 11: fin; 12: protrusion; 20: drainage structure; 21: first grid plate; 22: drainage port; 30: discharge structure; 31: second grid plate; 32: discharge port; 41: inlet header; 42: inlet header; 51: outlet header; 52: outlet header; 100: ship tail conformal cooler; 101: cooler shell; 200: pump; 300: heat exchanger. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The features of the terms "first" and "second" in the specification and claims of the present invention may include one or more of the features explicitly or implicitly. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0025] Combine the following Figure 1-Figure 4 The present invention describes a ship stern conformal cooler and a ship stern conformal cooling system.

[0026] like Figure 1 As shown, in an embodiment of the present invention, a ship tail conformal cooler 100 includes a cooler shell 101, a plurality of heat exchange tubes 10, a plurality of drainage structures 20 and a plurality of discharge structures 30. The cooler shell 101 is a ship tail shell, and a plurality of heat exchange tubes 10 are arranged in the cooler shell 101. Each heat exchange tube 10 includes a plurality of curved parts connected in sequence, and the heat exchange tube 10 can vibrate elastically under the lateral impact of seawater. A plurality of drainage structures 20 are arranged annularly on the surface of the first end of the cooler shell 101, and the inlet of the drainage structure 20 is opposite to the tube body of the heat exchange tube 10. The drainage structure 20 is used to introduce seawater into the cooler shell 101, so as to force the heat exchange tube 10 to vibrate elastically under the impact of seawater. A plurality of discharge structures 30 are arranged annularly on the second end of the cooler shell 101, and the discharge structure 30 is used to discharge the seawater in the cooler shell 101.

[0027] Specifically, in this embodiment, the heat transfer structure is arranged inside the cavity of the ship's stern, and the ship's stern shell is used as the cooler shell 101, which releases the cabin space occupied by the centralized cooler and improves the utilization rate of the ship's cabin. A plurality of heat exchange tubes 10 are arranged in the cooler shell 101, and a cooling medium flows in the heat exchange tubes 10, and seawater flows outside the heat exchange tubes 10. The seawater and the cooling medium exchange heat to take away the heat of the ship's stern conformal cooler 100. Further, in this embodiment, along the direction of travel of the ship, the first end of the cooler shell 101 is the front end of the ship's stern shell, and the second end of the cooler shell 101 is the rear end of the ship's stern shell. A plurality of drainage structures 20 are provided on the surface of the first end of the cooler shell 101, which can guide seawater into the cooler shell 101. Furthermore, in the present embodiment, the inlet of the drainage structure is opposite to the tube body of the heat exchange tube 10, so that the seawater can impact the heat exchange tube 10 laterally. The impact force of the seawater causes the heat exchange tube 10 to undergo irregular elastic vibrations, thereby interfering with the attachment and growth of marine organisms on the heat exchange tube 10.

[0028] Furthermore, in this embodiment, the heat exchange tube 10 can be a spiral heat exchange tube or a wavy heat exchange tube. Both of them have multiple bends, which reduce the resistance to the impact force of seawater and increase the flexibility of the heat exchange tube 10. When seawater impacts the tube body of the heat exchange tube 10 laterally, the heat exchange tube 10 can vibrate elastically, thereby shaking off the marine organisms, preventing the marine organisms from attaching to the outer wall of the heat exchange tube 10 and growing, and blocking the seawater flow channel formed by the gap between two adjacent heat exchange tubes 10, thereby blocking the flow of seawater and reducing the heat exchange capacity of the heat exchange tube 10.

[0029] The ship stern conformal cooler provided in an embodiment of the present invention reduces the resistance of the heat exchange tube to the impact of seawater and increases the flexibility of the heat exchange tube by designing the heat exchange tube to have a plurality of curved parts connected in sequence. Under the impact of seawater, the heat exchange tube can undergo irregular elastic vibrations, thereby preventing marine organisms from attaching to and growing on the outer wall of the heat exchange tube, ensuring that the flow channel between two adjacent heat exchange tubes is unobstructed, increasing the contact area between seawater and the heat exchange tube, and thereby improving the heat exchange capacity of the heat exchange tube.

[0030] Alternatively, if Figure 2 As shown, in the embodiment of the present invention, the heat exchange tube 10 can be a spiral heat exchange tube or a corrugated heat exchange tube. Specifically, compared with a straight heat exchange tube, the spiral heat exchange tube or the corrugated heat exchange tube has multiple bending parts, which improves the flexibility of the heat exchange tube 10 and reduces the resistance to the impact force of seawater, so that elastic vibration can occur under the impact of seawater to prevent marine organisms from attaching to the outer wall of the heat exchange tube 10 and growing.

[0031] like Figure 3 As shown, in an embodiment of the present invention, the ship tail conformal cooler further comprises a plurality of fins 11. The outer wall of each heat exchange tube 10 is provided with a plurality of fins 11, and the end of each fin 11 away from the surface of the heat exchange tube 10 is a pointed end.

[0032] Specifically, in this embodiment, one end of the fin 11 is connected to the outer wall of the heat exchange tube 10, and the other end of the fin 11 is pointed, and the surface area of ​​the tip is small, which can prevent marine organisms from landing, thereby preventing marine organisms from growing on it and blocking the gaps between adjacent heat exchange tubes 10. Furthermore, providing a plurality of fins 11 on the outer wall of the heat exchange tube 10 can also support the heat exchange tube 10 and increase the strength of the tube wall, thereby reducing the probability of the heat exchange tube 10 being damaged by pressure under external impact.

[0033] Furthermore, if Figure 3 As shown, the ship tail fin conformal cooler further includes a plurality of protrusions 12. At least one protrusion 12 is provided between two adjacent fins 11.

[0034] Specifically, at least one protrusion 12 is disposed between two adjacent fins 11 , and the protrusion can reduce the surface energy of marine organisms attached to the surface of the heat exchange tube 10 , thereby inhibiting the growth of marine organisms on the surface of the heat exchange tube 10 .

[0035] The ship stern conformal cooler provided in the embodiment of the present invention provides fins and protrusions on the outer wall of the heat exchange tube, one end of the fin is a pointed end, thereby reducing the surface area when marine organisms attach, thereby avoiding the attachment of marine organisms; the protrusion can reduce the surface energy when marine organisms attach, inhibit the attachment of marine organisms, thereby avoiding the growth of marine organisms on the surface of the heat exchange tube, and then blocking the seawater flow channel between adjacent heat exchange tubes, ensuring the smooth flow of seawater, increasing the contact area between seawater and the heat exchange tube, and improving the heat exchange capacity of the heat exchange tube.

[0036] like Figure 2 As shown, the drainage structure 20 is a first grid, which includes a plurality of first grid plates 21, the plurality of first grid plates 21 are parallel to each other, each first grid plate 21 is tilted, and the gap between two adjacent first grid plates 21 forms a drainage port 22, which faces the incoming flow direction.

[0037] Specifically, in the prior art, seawater is pumped to the central cooling system by a seawater pump, and heat is exchanged with the central cooling system. When the seawater pump fails, seawater cannot enter the central cooling system, causing the central cooling system to stop operating due to excessive temperature. In this embodiment, a plurality of drainage structures 20 are provided at the first end of the cooler housing 101, and the drainage port 22 of each drainage structure 20 faces the flow direction of the seawater. When the ship is traveling, the seawater enters the cooler housing 101 along the drainage port 22, realizing the automatic supply of seawater and avoiding the risk of shutdown caused by the failure of the seawater pump.

[0038] like Figure 2 As shown, in an embodiment of the present invention, the discharge structure 30 is a second grid, and the second grid includes a plurality of second grid plates 31, and the plurality of second grid plates 31 are parallel to each other, and each second grid plate 31 is tilted. The gap between two adjacent second grid plates 31 forms a discharge port 32, and the discharge port 32 faces away from the incoming flow direction.

[0039] Specifically, when the ship is traveling, seawater enters the cooler shell 101 through the inlet 22 , flows along the gaps between the heat exchange tubes 10 , exchanges heat with the heat exchange tubes 10 , and then is discharged into the sea through the outlet 32 ​​.

[0040] Furthermore, in an embodiment of the present invention, a drainage structure 20 is provided on the front arc surface of the ship's tail wing shell, and a discharge structure 30 is provided on the rear arc surface of the ship's tail wing shell. The stagnation pressure difference and flow separation effect at the arc surface can be utilized to drain and suck seawater. At the same time, the jet effect of the thruster outlet can be used to realize automatic supply of seawater, thereby avoiding the risk of system shutdown caused by seawater pump failure.

[0041] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the ship tail conformal cooler 100 further includes: an inlet header 41, an inlet header box 42, an outlet header 51 and an outlet header box 52. The inlet header 41 is arranged in the cooler shell 101, and the inlet header box 42 is also arranged in the cooler shell 101. The inlet header 41 is connected to the inlet header box 42, and the inlet header box 42 is also connected to the first ends of the plurality of heat exchange tubes 10. The outlet header box 52 and the outlet header 51 are also arranged in the cooler shell 101, and the outlet header box 52 is communicated with the second ends of the plurality of heat exchange tubes 10, and the outlet header 51 is connected to the outlet header box 52.

[0042] Specifically, the cooling medium enters the inlet header 42 from the inlet header 41, and then enters each heat exchange tube 10. The seawater flows in the gap between two adjacent heat exchange tubes 10, and the seawater exchanges heat with the cooling medium in the heat exchange tube 10, taking away the heat of the cooling medium. The cooling medium can be discharged from the cooler shell 101 through the outlet header 52 and the outlet header 51.

[0043] like Figure 4 As shown, an embodiment of the present invention further provides a ship stern conformal cooling system, comprising a heat exchanger 300, a pump 200, a propeller 400 and a ship stern conformal cooler 100. The heat exchanger 300 and the ship stern conformal cooler 100 form a circulation system, and the pump 200 is arranged in the circulation system, and the pump 200 is used to pump the load of the heat exchanger 300 into the ship stern conformal cooler 100.

[0044] Specifically, the heat exchanger 300 is used to cool the operating equipment in the ship. After the medium in the heat exchanger 300 absorbs heat, it is pumped by the pump 200 to the ship's tail conformal cooler 100 and enters the heat exchange tube 10 of the ship's tail conformal cooler 100. The seawater exchanges heat with the medium in the heat exchange tube 10, thereby taking away the heat carried by the medium. The medium with reduced temperature enters the heat exchanger 300 to continue cooling the operating equipment in the ship. The medium that absorbs heat enters the ship's tail conformal cooler 100 again under the action of the pump 200 for heat exchange. This cycle is repeated to continuously cool the heat exchanger 300, thereby continuously cooling the operating equipment in the ship. Further, in this embodiment, the propeller 400 is located in front of the ship's tail conformal cooler 100 along the forward direction of the ship. When the ship is moving, the jet effect at the outlet of the propeller 400 can be used to realize the automatic supply of seawater to the ship's tail conformal cooler 100, thereby avoiding the risk of system shutdown caused by seawater pump failure.

[0045] The ship stern conformal cooling system provided in an embodiment of the present invention, by arranging the heat exchanger and the ship stern conformal cooler as a circulation loop, can utilize seawater to continuously cool the heat exchanger, so that the medium in the heat exchanger has a lower temperature, thereby ensuring that the heat exchanger continuously cools the operating equipment in the ship, ensuring the continuous and stable operation of the operating equipment.

[0046] Furthermore, after the medium in the heat exchanger 300 absorbs heat, it flows through the inlet header 41 and the inlet header 42 of the ship tail conformal cooler 100 under the action of the pump 200 and enters each heat exchange tube 10. The seawater enters the cooler shell 101 through the drainage port 22 of the drainage structure 20. The seawater impacts the heat exchange tube 10 laterally, causing the heat exchange tube 10 to vibrate elastically, thereby preventing marine organisms from attaching to the outer wall of the heat exchange tube 10, and ensuring that the seawater flow channel formed between adjacent heat exchange tubes 10 is unobstructed. The seawater flows along the coastal water channel and exchanges heat with the medium with a higher temperature in the heat exchange tube 10. The seawater that absorbs heat is discharged into the sea through the discharge port 32 of the discharge structure 30. The medium with a lowered temperature in the heat exchange tube 10 flows through the outlet header 52 and the outlet header 51 and enters the heat exchanger 300, and exchanges heat with the operating equipment in the ship again.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ship tail fin conformal cooler, characterized in that: include: A cooler shell, wherein the cooler shell is a ship stern shell, wherein a plurality of heat exchange tubes are arranged in the cooler shell, each of the heat exchange tubes comprises a plurality of bent parts connected in sequence, and the heat exchange tubes can vibrate elastically under the lateral impact of seawater; A plurality of drainage structures, wherein the plurality of drainage structures are circumferentially arranged on the surface of the first end of the cooler shell, the inlet of the drainage structure is opposite to the tube body of the heat exchange tube, and the drainage structure is used to introduce seawater into the cooler shell; A plurality of discharge structures are circumferentially arranged at the second end of the cooler shell, and the discharge structures are used to discharge the seawater in the cooler shell.

2. The ship tail fin conformal cooler according to claim 1, characterized in that: The heat exchange tube is in a spiral shape.

3. The ship stern conformal cooler according to claim 1, characterized in that: The heat exchange tube is wave-shaped.

4. The ship stern conformal cooler according to any one of claims 1 to 3, characterized in that: It also includes a plurality of fins. The outer wall of each heat exchange tube is provided with a plurality of the fins. The end of each fin away from the surface of the heat exchange tube is a pointed end.

5. The ship tail fin conformal cooler according to claim 4, characterized in that: It also includes a plurality of protrusions, and at least one protrusion is arranged between every two adjacent ribs.

6. The ship stern conformal cooler according to claim 1, characterized in that: The drainage structure is a first grid, which includes a plurality of first grid plates, which are parallel to each other, each of which is tilted, and a gap between two adjacent first grid plates forms a drainage port, which faces the incoming flow direction.

7. The ship stern conformal cooler according to claim 1 or 6, characterized in that: The discharge structure is a second grid, which includes a plurality of second grid plates, which are parallel to each other, each of which is tilted, and a gap between two adjacent second grid plates forms a discharge port, which faces away from the incoming flow direction.

8. The ship stern conformal cooler according to claim 1, characterized in that: Also includes: an inlet header, disposed in the cooler shell; An inlet header is disposed in the cooler shell, the inlet header is connected to the inlet header, and the inlet header is also communicated with the first ends of the plurality of heat exchange tubes.

9. The ship stern conformal cooler according to claim 1 or 8, characterized in that: Also includes: An outlet header is disposed in the cooler shell, and the outlet header is communicated with the second ends of the plurality of heat exchange tubes; An outlet header is arranged in the cooler shell, and the outlet header is connected to the outlet header box.

10. A conformal cooling system for a ship tail fin, characterized in that: It comprises a heat exchanger, a pump, a propeller and the ship stern conformal cooler according to any one of claims 1 to 9, wherein the heat exchanger and the ship stern conformal cooler form a circulation loop, the pump is arranged in the circulation loop, and the pump is used to pump the load of the heat exchanger into the ship stern conformal cooler. Along the forward direction of the ship, the propeller is located in front of the ship stern conformal cooler and is used to push seawater into the ship stern conformal cooler.

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