Indirect air cooling system and operation control method thereof

Abstract

The invention discloses an indirect air cooling system and an operation control method thereof.The indirect air cooling system comprises a first heat exchanger array, a second heat exchanger array, a pipeline assembly, a valve assembly and a cooling medium circulating system, and the first heat exchanger array and the second heat exchanger array are both connected with the cooling medium circulating system through the pipeline assembly; the valve assembly is arranged on the pipeline assembly, the cooling medium circulating system is used for providing a cooling medium to the first heat exchanger array and / or the second heat exchanger array, and the valve assembly is used for limiting communication between the cooling medium circulating system and the first heat exchanger array and / or the second heat exchanger array. Through the application of the indirect air cooling system, the cooling effect can be flexibly adjusted, the indirect air cooling system can effectively meet the heat dissipation requirements of different special working conditions, the adjusting range is large, control is convenient, automatic control can be achieved easily, and meanwhile energy-saving operation of the whole indirect air cooling system can be further achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air cooling, and in particular to an indirect air cooling system and an operation control method thereof. Background Art

[0002] At present, in order to meet the cooling needs of key parts of thermal power plants, an indirect air cooling system is more commonly used. In the prior art, the indirect air cooling system includes a plurality of air-cooled heat exchangers connected by pipes, and generally such air-cooled heat exchangers are arranged in an array at the indirect air cooling tower of the thermal power plant, and the cooling medium is circulated in the cooling heat exchanger.

[0003] For example, according to the existing Chinese authorized patent CN201410252992.7, existing air-cooled heat exchangers are often arranged in a sector-type layout, that is, multiple air-cooled heat exchangers are arranged in a sector-shaped array, and the corresponding pipelines are set based on this sector. However, in response to different working conditions, in order to adjust the cooling effect of the indirect air-cooling system, the technicians can only operate a certain sector to stop the operation as a whole to exit the entire air-cooling system, which has poor adjustment flexibility and is difficult to meet the heat dissipation required by some special working conditions. Summary of the invention

[0004] In view of this, in order to solve the above problems, the object of the present invention is to provide an indirect air cooling system, comprising: a first heat exchanger array, a second heat exchanger array, a pipe assembly, a valve assembly and a cooling medium circulation system, the first heat exchanger array and the second heat exchanger array are both connected to the cooling medium circulation system through the pipe assembly, the valve assembly is arranged on the pipe assembly, the cooling medium circulation system is used to provide cooling medium to the first heat exchanger array and / or the second heat exchanger array, and the valve assembly is used to limit the connection between the cooling medium circulation system and the first heat exchanger array and / or the second heat exchanger array.

[0005] In another preferred embodiment, the first heat exchanger array includes a plurality of heat exchanger units arranged in parallel, and the second heat exchanger array includes a plurality of heat exchanger units arranged in parallel.

[0006] In another preferred embodiment, the heat exchanger unit comprises: a triangular cooling structure and a louver structure, the triangular cooling structure has two heat exchange surfaces connected in sequence and a mounting surface, and the louver structure is arranged on the mounting surface.

[0007] In another preferred embodiment, the pipeline assembly comprises:

[0008] An inlet pipe, one end of which is connected to the cooling medium circulation system, and the other end of which is connected to the middle of the first main pipe;

[0009] an outlet pipe, one end of which is connected to the cooling medium circulation system, and the other end of which is connected to the middle part of the second main pipe;

[0010] A first main pipe, two ends of which are respectively connected to the first heat exchanger array and the second heat exchanger array;

[0011] a second main pipe, two ends of which are respectively connected to the first heat exchanger array and the second heat exchanger array;

[0012] a first auxiliary pipe, one end of which is connected to the outlet pipe, and the other end of which is connected to the first main pipe;

[0013] a second sub-pipe, one end of the second sub-pipe being connected to the other end of the first sub-pipe, one end of the second sub-pipe being connected to the first main pipe, and the other end of the second sub-pipe being connected to the second main pipe;

[0014] A third sub-pipe, one end of the third sub-pipe is connected to the first main pipe, and the other end of the third sub-pipe is connected to the second main pipe.

[0015] In another preferred embodiment, the valve assembly comprises:

[0016] a first valve, wherein the first valve is disposed on the inlet pipe;

[0017] a second valve, the second valve being disposed on the outlet pipe;

[0018] a third valve, the third valve being disposed on the first main pipe;

[0019] a fourth valve, the fourth valve being disposed on the second main pipe;

[0020] a fifth valve, the fifth valve being arranged on the first auxiliary pipe;

[0021] a first one-way valve, wherein the first one-way valve is arranged on the second auxiliary pipe;

[0022] a second one-way valve, the second one-way valve being arranged on the third auxiliary pipe;

[0023] a third one-way valve, the third one-way valve being arranged on the first main pipe;

[0024] A fourth one-way valve is arranged on the second main pipe.

[0025] In another preferred embodiment, it is characterized in that

[0026] The second valve is disposed close to the second main pipe at one end of the first sub-pipe;

[0027] The other end of the inlet pipe, the third valve, the other end of the first auxiliary pipe, the third one-way valve and one end of the third auxiliary pipe are sequentially arranged on the first main pipe;

[0028] The other end of the outlet pipe, the fourth valve, the other end of the third auxiliary pipe, the fourth one-way valve and the other end of the second auxiliary pipe are sequentially arranged on the second main pipe.

[0029] The present invention also aims to provide an operation control method for an indirect air cooling system, including an indirect air cooling system as described in any one of the above, wherein the operation control method is: allowing the cooling medium to be split and enter the first heat exchanger array and the second heat exchanger array respectively.

[0030] The present invention also aims to provide an operation control method for an indirect air cooling system, including an indirect air cooling system as described in any one of the above, wherein the operation control method is: allowing the cooling medium to first enter the first heat exchanger array and then enter the second heat exchanger array.

[0031] The present invention also aims to provide an operation control method for an indirect air cooling system, including an indirect air cooling system as described in any one of the above, wherein the operation control method is: allowing the cooling medium to enter only the first heat exchanger array or the second heat exchanger array.

[0032] The present invention also aims to provide an operation control method of an indirect air cooling system, including any one of the indirect air cooling systems described above, wherein the operation control method is to allow the cooling medium to pass through only a portion of the pipeline assembly.

[0033] Due to the adoption of the above technical solution, the present invention has the following positive effects compared with the prior art:

[0034] Through the application of the present invention, an indirect air cooling system is provided which can flexibly adjust the cooling effect, can effectively adapt to the heat dissipation requirements of different special working conditions, has a large adjustment range, and is relatively easy to control, which is conducive to the realization of automatic control, and can also further realize the energy-saving operation of the entire indirect air cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is an overall schematic diagram of an indirect air cooling system of the present invention;

[0036] Figure 2 It is a first schematic diagram of an operation control method of an indirect air cooling system of the present invention;

[0037] Figure 3 A second schematic diagram of an operation control method of an indirect air cooling system of the present invention;

[0038] Figure 4 is a third schematic diagram of an operation control method of an indirect air cooling system of the present invention;

[0039] Figure 5 This is a fourth schematic diagram of an operation control method for an indirect air cooling system according to the present invention.

[0040] In the attached figure:

[0041] 1. First heat exchanger array; 2. Second heat exchanger array; 3. Pipe assembly; 4. Valve assembly; 5. Heat exchanger unit; 6. Inlet pipe; 7. Outlet pipe; 8. First main pipe; 9. Second main pipe; 10. First auxiliary pipe; 11. Second auxiliary pipe; 12. Third auxiliary pipe; 13. First valve; 14. Second valve; 15. Third valve; 16. Fourth valve; 17. Fifth valve; 18. First one-way valve; 19. Second one-way valve; 20. Third one-way valve; 21. Fourth one-way valve. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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.

[0043] In the description of the present invention, it is necessary to understand that the orientation or position relationship indicated by the terms such as "upper", "lower", "left", "right", "inside", "outside", "front", "back", "lateral" and "vertical" is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or original referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] It should be specially explained that the “horizontal” and “vertical” in the present invention are used to illustrate the approximate positional relationship, rather than a strict “horizontal plane” or “vertical plane”.

[0045] like Figure 1As shown, an indirect air cooling system of a preferred embodiment is shown, comprising: a first heat exchanger array 1, a second heat exchanger array 2, a pipe assembly 3, a valve assembly 4 and a cooling medium circulation system, the first heat exchanger array 1 and the second heat exchanger array 2 are both connected to the cooling medium circulation system through the pipe assembly 3, the valve assembly 4 is arranged on the pipe assembly 3, the cooling medium circulation system is used to provide cooling medium to the first heat exchanger array 1 and / or the second heat exchanger array 2, and the valve assembly 4 is used to limit the communication between the cooling medium circulation system and the first heat exchanger array 1 and / or the second heat exchanger array 2. Further, through the cooperation of the pipe assembly 3 and the valve assembly 4, the first heat exchanger array 1 and the second heat exchanger array 2 are selectively used, so that the first heat exchanger array 1 and / or the second heat exchanger array 2 are in a normal working state or a stopped state.

[0046] Further, as a preferred embodiment, the first heat exchanger array 1 and the second heat exchanger array 2 are connected to each other via a pipe assembly 3 .

[0047] Further, as a preferred embodiment, the first heat exchanger array 1 includes a plurality of heat exchanger units 5 arranged in parallel, and the second heat exchanger array 2 includes a plurality of heat exchanger units 5 arranged in parallel. Further, the heat exchanger unit 5 is a core heat dissipation element for air cooling, and a cooling medium is circulated and transported inside to be in heat exchangeable contact with the external part to be exchanged.

[0048] Further, as a preferred embodiment, the several heat exchanger units 5 included in the first heat exchanger array 1 and / or the second heat exchanger array 2 may also be arranged in series.

[0049] Further, as a preferred embodiment, the first heat exchanger array 1 and / or the second heat exchanger array 2 includes at least two heat exchanger units 5 .

[0050] Further, as a preferred embodiment, the first heat exchanger array 1 and / or the second heat exchanger array 2 may be arranged together or separately in a fan-shaped array.

[0051] Further, as a preferred embodiment, the first heat exchanger array 1 and / or the second heat exchanger array 2 may be arranged in multiple layers together or separately, and the multiple layers are stacked arrangements of at least two heat exchanger units 5 in the vertical direction.

[0052] Further, as a preferred embodiment, the heat exchanger unit 5 includes: a triangular cooling structure and a louver structure, the triangular cooling structure has two heat exchange surfaces and a mounting surface connected in sequence, and the louver structure is arranged on the mounting surface. Further, the bottom of the triangular cooling structure is provided with an inlet and an outlet for the cooling medium, and the louver structure is used to allow or prevent the cooling airflow from flowing through the corresponding heat exchanger unit 5 by opening or closing when the heat exchanger unit 5 is put into use or out of operation.

[0053] Further, as a preferred embodiment, a return water tank is provided at the top of the triangular cooling structure. Further, the cooling medium preferably enters a part of the triangular cooling structure through the inlet, then enters another part of the triangular cooling structure through the return water tank, and flows out of the triangular cooling structure through the outlet.

[0054] Furthermore, as a preferred embodiment, the cooling structure at the heat exchange surface is preferably a double-pass setting.

[0055] Further, as a preferred embodiment, the heat exchanger unit 5 is configured in a triangular prism shape as a whole.

[0056] Further, as a preferred embodiment, the pipeline assembly 3 includes: an inlet pipe 6, one end of which is connected to the cooling medium circulation system, and the other end of which is connected to the middle of the first main pipe 8; an outlet pipe 7, one end of which is connected to the cooling medium circulation system, and the other end of which is connected to the middle of the second main pipe 9; a first main pipe 8, two ends of which are respectively connected to the first heat exchanger array 1 and the second heat exchanger array 2; a second main pipe 9, two ends of which are respectively connected to the first heat exchanger array 1 and the second heat exchanger array 2; a first sub-pipe 10, one end of which is connected to the outlet pipe 7, and the other end of which is connected to the first main pipe 8; a second sub-pipe 11, one end of which is connected to the other end of the first sub-pipe 10, one end of which is connected to the first main pipe 8, and the other end of which is connected to the second main pipe 9; a third sub-pipe 12, one end of which is connected to the first main pipe 8, and the other end of which is connected to the second main pipe 9.

[0057] Furthermore, as a preferred embodiment, the second sub-pipe 11 and the third sub-pipe 12 are arranged crosswise.

[0058] Further, as a preferred embodiment, the valve assembly 4 includes: a first valve 13, the first valve 13 is arranged on the inlet pipe 6; a second valve 14, the second valve 14 is arranged on the outlet pipe 7; a third valve 15, the third valve 15 is arranged on the first main pipe 8; a fourth valve 16, the fourth valve 16 is arranged on the second main pipe 9; a fifth valve 17, the fifth valve 17 is arranged on the first auxiliary pipe 10; a first one-way valve 18, the first one-way valve 18 is arranged on the second auxiliary pipe 11; a second one-way valve 19, the second one-way valve 19 is arranged on the third auxiliary pipe 12; a third one-way valve 20, the third one-way valve 20 is arranged on the first main pipe 8; a fourth one-way valve 21, the fourth one-way valve 21 is arranged on the second main pipe 9.

[0059] Further, as a preferred embodiment, the second valve 14 is arranged near the second main pipe 9 relative to one end of the first sub-pipe 10; the other end of the inlet pipe 6, the third valve 15, the other end of the first sub-pipe 10, the third one-way valve 20 and one end of the third sub-pipe 12 are arranged in sequence on the first main pipe 8; the other end of the outlet pipe 7, the fourth valve 16, the other end of the third sub-pipe 12, the fourth one-way valve 21 and the other end of the second sub-pipe 11 are arranged in sequence on the second main pipe 9.

[0060] Further, as a preferred embodiment, the first one-way valve 18 is used to allow the cooling medium to flow only in the direction from the second main pipe 9 to the first main pipe 8, the second one-way valve 19 is used to allow the cooling medium to flow only in the direction from the second main pipe 9 to the first main pipe 8, the third one-way valve 20 is used to allow the cooling medium to flow only in the direction from the first heat exchanger array 1 to the second heat exchanger array 2, and the fourth one-way valve 21 is used to allow the cooling medium to flow only in the direction from the second heat exchanger array 2 to the first heat exchanger array 1.

[0061] Furthermore, as a preferred embodiment, the pipeline assembly 3 is provided with instruments for monitoring, such as a pressure gauge and a flow meter.

[0062] Among them, Figures 1 to 5 As shown in , the cooling medium flows in the direction of the arrow, the solid valve or the one-way valve is in a closed state, and the hollow valve or the one-way valve is in an open state.

[0063] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention.

[0064] The present invention also has the following implementation modes based on the above:

[0065] In a further embodiment of the present invention, by controlling the valve assembly 4, the indirect air cooling system can implement any one of the following operation control methods, and can switch between different operation control methods at will.

[0066] like Figure 2 As shown, an operation control method of an indirect air cooling system of a preferred embodiment is shown, including any one of the indirect air cooling systems described above, and the operation control method is: the cooling medium is split and enters the first heat exchanger array 1 and the second heat exchanger array 2 respectively. Further, the first heat exchanger array 1 and the second heat exchanger array 2 are in a parallel operation state, and the cooling medium is split through the pipeline assembly 3 and flows to the first heat exchanger array 1 and the second heat exchanger array 2 respectively, and then converges after being cooled by air, and finally returns to the cooling medium circulation system.

[0067] In a further embodiment of the present invention, when using Figure 2 In the operation control method shown, only the fifth valve 17 is closed, and the remaining valves and the one-way valve are opened.

[0068] like Figure 3 As shown, an operation control method of an indirect air cooling system of a preferred embodiment is shown, including any one of the indirect air cooling systems described above, and the operation control method is: the cooling medium first enters the first heat exchanger array 1, and then enters the second heat exchanger array 2. Further, the first heat exchanger array 1 and the second heat exchanger array 2 are in a series operation state, and the cooling medium first enters the first heat exchanger array 1 through the pipeline assembly 3, and then enters the second heat exchanger array 2 through the pipeline assembly 3.

[0069] In a further embodiment of the present invention, when using Figure 3 In the operation control method shown, only the second valve 14 and the third valve 15 are closed, and the remaining valves and the one-way valve are opened.

[0070] like Figure 4 As shown, an operation control method of an indirect air cooling system of a preferred embodiment is shown, including any one of the indirect air cooling systems described above, and the operation control method is: the cooling medium is allowed to enter only the first heat exchanger array 1 or the second heat exchanger array 2. Further, the cooling medium is restricted to enter only the first heat exchanger array 1, and the second heat exchanger array 2 is out of operation, and the cooling medium does not pass through the second heat exchanger array 2.

[0071] In a further embodiment of the present invention, when using Figure 4 In the operation control method shown, only the third valve 15, the fourth valve 16 and the fifth valve 17 are closed, and the remaining valves and the one-way valve are opened.

[0072] like Figure 5As shown, an operation control method of an indirect air cooling system of a preferred embodiment is shown, including any one of the indirect air cooling systems described above, and the operation control method is: the cooling medium only passes through a portion of the pipeline assembly 3. Further, after the cooling medium enters the current indirect air cooling system, it only flows to the next position through a portion of the pipeline assembly 3, and does not enter the first heat exchanger array 1 and the second heat exchanger array 2, and the first heat exchanger array 1 and the second heat exchanger array 2 are both out of operation.

[0073] In a further embodiment of the present invention, when using Figure 5 In the operation control method shown, only the second valve 14 and the fourth valve 16 are closed, and the remaining valves and the one-way valve are opened.

[0074] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An indirect air cooling system, characterized in that: include: A first heat exchanger array, a second heat exchanger array, a pipe assembly, a valve assembly and a cooling medium circulation system, wherein the first heat exchanger array and the second heat exchanger array are both connected to the cooling medium circulation system via the pipe assembly, the valve assembly is arranged on the pipe assembly, the cooling medium circulation system is used to provide cooling medium to the first heat exchanger array and / or the second heat exchanger array, and the valve assembly is used to limit the communication between the cooling medium circulation system and the first heat exchanger array and / or the second heat exchanger array.

2. The indirect air cooling system according to claim 1, characterized in that: The first heat exchanger array includes a plurality of heat exchanger units arranged in parallel, and the second heat exchanger array includes a plurality of heat exchanger units arranged in parallel.

3. The indirect air cooling system according to claim 2, characterized in that: The heat exchanger unit comprises: a triangular cooling structure and a louver structure, wherein the triangular cooling structure has two heat exchange surfaces connected in sequence and a mounting surface, and the louver structure is arranged on the mounting surface.

4. The indirect air cooling system according to claim 1, characterized in that: The pipeline assembly comprises: an inlet pipe, one end of which is connected to the cooling medium circulation system, and the other end of which is connected to the middle part of the first main pipe; an outlet pipe, one end of which is connected to the cooling medium circulation system, and the other end of which is connected to the middle part of the second main pipe; A first main pipe, two ends of which are respectively connected to the first heat exchanger array and the second heat exchanger array; a second main pipe, two ends of which are respectively connected to the first heat exchanger array and the second heat exchanger array; a first auxiliary pipe, one end of which is connected to the outlet pipe, and the other end of which is connected to the first main pipe; a second sub-pipe, one end of the second sub-pipe being connected to the other end of the first sub-pipe, one end of the second sub-pipe being connected to the first main pipe, and the other end of the second sub-pipe being connected to the second main pipe; A third sub-pipe, one end of the third sub-pipe is connected to the first main pipe, and the other end of the third sub-pipe is connected to the second main pipe.

5. The indirect air cooling system according to claim 4, characterized in that: The valve assembly comprises: a first valve, wherein the first valve is disposed on the inlet pipe; a second valve, the second valve being disposed on the outlet pipe; a third valve, the third valve being disposed on the first main pipe; a fourth valve, the fourth valve being disposed on the second main pipe; a fifth valve, the fifth valve being arranged on the first auxiliary pipe; a first one-way valve, wherein the first one-way valve is arranged on the second auxiliary pipe; a second one-way valve, the second one-way valve being arranged on the third auxiliary pipe; a third one-way valve, the third one-way valve being arranged on the first main pipe; A fourth one-way valve is arranged on the second main pipe.

6. The indirect air cooling system according to claim 5, characterized in that: The second valve is disposed close to the second main pipe at one end of the first sub-pipe; The other end of the inlet pipe, the third valve, the other end of the first auxiliary pipe, the third one-way valve and one end of the third auxiliary pipe are sequentially arranged on the first main pipe; The other end of the outlet pipe, the fourth valve, the other end of the third auxiliary pipe, the fourth one-way valve and the other end of the second auxiliary pipe are sequentially arranged on the second main pipe.

7. An operation control method of an indirect air cooling system, comprising the indirect air cooling system according to any one of claims 1 to 6, characterized in that: The operation control method is: the cooling medium is split and enters the first heat exchanger array and the second heat exchanger array respectively.

8. An operation control method of an indirect air cooling system, comprising the indirect air cooling system according to any one of claims 1 to 6, characterized in that: The operation control method is: allowing the cooling medium to first enter the first heat exchanger array and then enter the second heat exchanger array.

9. An operation control method of an indirect air cooling system, comprising the indirect air cooling system according to any one of claims 1 to 6, characterized in that: The operation control method is: allowing the cooling medium to enter only the first heat exchanger array or the second heat exchanger array.

10. An operation control method of an indirect air cooling system, comprising the indirect air cooling system according to any one of claims 1 to 6, characterized in that: The operation control method is to allow the cooling medium to pass through only a portion of the pipeline assembly.

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