A compact heat exchanger tube network system for uniform distribution of flow and a method of operation thereof

Abstract

The application discloses a compact heat exchanger pipe network system capable of uniformly distributing flow and a working method thereof, and belongs to the technical field of heat exchange. A plurality of branch pipes of equal length are distributed radially at the outlet of a heat exchange fluid distribution header, and the angles between adjacent branch pipes are equal. Each branch pipe is connected with a compact heat exchanger and a plurality of equal-length collecting pipes are distributed radially at the outlet of the collecting header. The flow paths of the heat exchange fluid flowing through the branch pipes, the collecting pipes and the compact heat exchangers are equal in length and are symmetrically distributed, so that the resistance loss along the paths and the local resistance loss are equal at the equal-distance paths of the heat exchange fluid from the header, the flow distribution of each branch pipe and each compact heat exchanger is consistent under the driving of the equal pressure difference, the working loads of the compact heat exchangers in the heat exchange system are basically consistent, and the safe and stable operation of the heat exchange system is ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heat exchange, and particularly relates to a compact heat exchanger pipe network system capable of uniformly distributing flow and a working method thereof. BACKGROUND

[0002] The large-load heat exchange scene using the compact heat exchanger is because, due to the manufacturing process of a single heat exchanger, multiple compact heat exchangers need to be arranged in a series-parallel mode to form a heat exchanger network to meet the heat exchange demand.

[0003] For the parallel arrangement mode of multiple compact heat exchangers, the most common flow distribution mode is a U-shaped and Z-shaped multi-branch parallel pipe network, which is composed of a flow distribution header, parallel branch pipes and a flow collection header. Figure 1 As shown in the Z-shaped multi-branch parallel compact heat exchanger pipe network, two heat exchange fluids flow into the respective flow distribution headers, pass through the parallel branch pipes between the flow distribution header and the flow collection header, realize flow distribution, flow into each compact heat exchanger, and after completing heat exchange, flow through the parallel branch pipes between the two headers again to be collected in the flow collection header and flow out of the heat exchanger network. However, due to the inherent characteristics of the multi-branch parallel pipe network, the flow distribution of each branch pipe and each heat exchanger is uneven, and with the increase in the number of parallel branch pipes, the flow distribution deviation is greater. Under high-temperature working conditions, the pipes with small flow are prone to over-temperature and pipe explosion, and the heat exchangers with large flow are prone to overload operation, which threatens the safe and stable operation of the heat exchange system. SUMMARY

[0004] In order to solve the above-mentioned existing problems, the purpose of the present application is to provide a compact heat exchanger pipe network system capable of uniformly distributing flow and a working method thereof, which can realize uniform flow distribution of each branch pipe and each heat exchanger, solve a series of problems caused by uneven flow distribution of the compact heat exchanger network, and guarantee the safe and stable operation of the heat exchange system.

[0005] The application is realized by the following technical solutions:

[0006] The application discloses a compact heat exchanger pipe network system capable of uniformly distributing flow, which comprises a first heat exchange fluid flow distribution header, a first heat exchange fluid flow distribution branch pipe group, a compact heat exchanger group, a first heat exchange fluid flow collection branch pipe group, a first heat exchange fluid flow collection header, a second heat exchange fluid flow distribution header, a second heat exchange fluid flow distribution branch pipe group, a second heat exchange fluid flow collection branch pipe group and a second heat exchange fluid flow collection header.

[0007] The first heat exchange fluid branch pipe group comprises a plurality of first heat exchange fluid branch pipes radially distributed around the first heat exchange fluid branch pipe header, the inlets of all the first heat exchange fluid branch pipes being connected to the outlet of the first heat exchange fluid branch pipe header; the compact heat exchanger group comprises a plurality of compact heat exchangers, the outlet of each first heat exchange fluid branch pipe being connected to the first side inlet of a compact heat exchanger; the first heat exchange fluid collecting pipe group comprises a plurality of first heat exchange fluid collecting pipes radially distributed around the first heat exchange fluid collecting pipe header, the inlet of each first heat exchange fluid collecting pipe being connected to the first side outlet of a compact heat exchanger, and the outlets of all the first heat exchange fluid collecting pipes being connected to the inlet of the first heat exchange fluid collecting pipe header;

[0008] The second heat exchange fluid branch pipe group comprises a plurality of second heat exchange fluid branch pipes radially distributed around the second heat exchange fluid branch pipe header, the inlets of all the second heat exchange fluid branch pipes being connected to the outlet of the second heat exchange fluid branch pipe header; the outlet of each second heat exchange fluid branch pipe being connected to the second side inlet of a compact heat exchanger; the second heat exchange fluid collecting pipe group comprises a plurality of second heat exchange fluid collecting pipes radially distributed around the second heat exchange fluid collecting pipe header, the inlet of each second heat exchange fluid collecting pipe being connected to the second side outlet of a compact heat exchanger, and the outlets of all the second heat exchange fluid collecting pipes being connected to the inlet of the second heat exchange fluid collecting pipe header.

[0009] Preferably, the plurality of first heat exchange fluid branch pipes in the first heat exchange fluid branch pipe group are equal in length, the plurality of first heat exchange fluid collecting pipes in the first heat exchange fluid collecting pipe group are equal in length, the plurality of second heat exchange fluid branch pipes in the second heat exchange fluid branch pipe group are equal in length, and the plurality of second heat exchange fluid collecting pipes in the second heat exchange fluid collecting pipe group are equal in length.

[0010] Preferably, the angle between adjacent first heat exchange fluid branch pipes is 360° / M, M being the number of first heat exchange fluid branch pipes; the angle between adjacent first heat exchange fluid collecting pipes is 360° / N, N being the number of first heat exchange fluid collecting pipes; the angle between adjacent second heat exchange fluid branch pipes is 360° / O, O being the number of second heat exchange fluid branch pipes; and the angle between adjacent second heat exchange fluid collecting pipes is 360° / P, P being the number of second heat exchange fluid collecting pipes.

[0011] Further preferably, the first heat exchange fluid distribution branch pipes in the first heat exchange fluid distribution branch pipe group are distributed symmetrically with the first heat exchange fluid distribution header as the center, the first heat exchange fluid collection branch pipes in the first heat exchange fluid collection branch pipe group are distributed symmetrically with the first heat exchange fluid collection header as the center, the second heat exchange fluid distribution branch pipes in the second heat exchange fluid distribution branch pipe group are distributed symmetrically with the second heat exchange fluid distribution header as the center, and the second heat exchange fluid collection branch pipes in the second heat exchange fluid collection branch pipe group are distributed symmetrically with the second heat exchange fluid collection header as the center.

[0012] Preferably, the compact heat exchanger in the compact heat exchanger group comprises a first heat exchange fluid inlet header, a first heat exchange fluid outlet header, a second heat exchange fluid inlet header, a second heat exchange fluid outlet header, and a core; the first heat exchange fluid inlet header is connected with the first heat exchange fluid distribution branch pipe, and the first heat exchange fluid outlet header is connected with the first heat exchange fluid collection branch pipe; the second heat exchange fluid inlet header is connected with the second heat exchange fluid distribution branch pipe, and the second heat exchange fluid outlet header is connected with the second heat exchange fluid collection branch pipe; the first heat exchange fluid and the second heat exchange fluid exchange heat in the heat exchange channel in the core.

[0013] Further preferably, the first heat exchange fluid and the second heat exchange fluid exchange heat in the core in countercurrent.

[0014] Preferably, the total mass flow of the first heat exchange fluid in the first heat exchange fluid distribution header and the first heat exchange fluid collection header is equal; and the total mass flow of the second heat exchange fluid in the second heat exchange fluid distribution header and the second heat exchange fluid collection header is equal.

[0015] Preferably, the mass flow of each first heat exchange fluid distribution branch pipe in the first heat exchange fluid distribution branch pipe group is equal, and the sum is equal to the total mass flow of the first heat exchange fluid; the mass flow of each first heat exchange fluid collection branch pipe in the first heat exchange fluid collection branch pipe group is equal, and the sum is equal to the total mass flow of the first heat exchange fluid; the mass flow of each second heat exchange fluid distribution branch pipe in the second heat exchange fluid distribution branch pipe group is equal, and the sum is equal to the total mass flow of the second heat exchange fluid; and the mass flow of each second heat exchange fluid collection branch pipe in the second heat exchange fluid collection branch pipe group is equal, and the sum is equal to the total mass flow of the second heat exchange fluid.

[0016] Preferably, all the compact heat exchangers in the compact heat exchanger group are distributed on the same plane.

[0017] The working method of the above-mentioned compact heat exchanger pipe network system with uniform flow distribution disclosed in the application comprises:

[0018] The first heat exchange fluid is distributed into each first heat exchange fluid distribution branch pipe in the first heat exchange fluid distribution branch pipe group by the first heat exchange fluid distribution header, and then into each compact heat exchanger in the compact heat exchanger group; the second heat exchange fluid is distributed into each second heat exchange fluid distribution branch pipe in the second heat exchange fluid distribution branch pipe group by the second heat exchange fluid distribution header, and then into each compact heat exchanger in the compact heat exchanger group;

[0019] The first heat exchange fluid and the second heat exchange fluid complete heat exchange in the compact heat exchanger;

[0020] After completing heat exchange, the first heat exchange fluid is collected in the first heat exchange fluid collecting header by each first heat exchange fluid collecting branch pipe in the first heat exchange fluid collecting branch pipe group, and then flows out of the system; the second heat exchange fluid is collected in the second heat exchange fluid collecting header by each second heat exchange fluid collecting branch pipe in the second heat exchange fluid collecting branch pipe group, and then flows out of the system.

[0021] Compared with the prior art, the present application has the following beneficial technical effects:

[0022] The compact heat exchanger pipe network system for uniform distribution of flow disclosed in the present application is provided with a plurality of radially distributed equal-length distribution branch pipes which are connected to the compact heat exchanger through the distribution branch pipes and the collecting branch pipes, and the outlets of the equal-length collecting branch pipes are connected to the collecting header. The flow paths of the heat exchange fluids flowing through the distribution branch pipes, the collecting branch pipes and the compact heat exchanger are equal in length and symmetrically distributed, so that the resistance loss along the path and the local resistance loss of the heat exchange fluids at the equal-distance path from the header are equal, and the flow distribution of each branch pipe and each compact heat exchanger is consistent under the driving of the equal pressure difference, so that the working load of each compact heat exchanger in the heat exchange system is basically consistent, and the safe and stable operation of the heat exchange system is ensured.

[0023] The working method of the compact heat exchanger pipe network system for uniform distribution of flow disclosed in the present application is simple in structure, has no additional components, and can realize uniform distribution of flow by only slightly modifying the original U-shaped and Z-shaped multi-branch parallel pipe network, and can be widely applied to the construction of a new heat exchange pipe network system and the modification of an existing heat exchange pipe network system. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic view of the Z-shaped multi-branch parallel compact heat exchanger pipe network in the prior art;

[0025] Figure 2 It is a schematic view of the overall structure of the system of the present application;

[0026] Figure 3 It is a schematic view of the structure of the first heat exchange fluid flow path and components in the system of the embodiment;

[0027] Figure 4 Structure diagram of single strand heat exchange fluid flow path and components in the system of the embodiment;

[0028] Figure 5 Structure diagram of single strand heat exchange fluid flow path and components in the system of the embodiment.

[0029] In the figure: 1 is a first heat exchange fluid distribution header, 2 is a first heat exchange fluid distribution branch pipe group, 3 is a compact heat exchanger group, 4 is a first heat exchange fluid collection branch pipe group, 5 is a first heat exchange fluid collection header, 6 is a second heat exchange fluid distribution header, 7 is a second heat exchange fluid distribution branch pipe group, 8 is a second heat exchange fluid collection branch pipe group, 9 is a second heat exchange fluid collection header; 2-1 is a first heat exchange fluid distribution branch pipe group No. 1 pipe, 2-2 is a first heat exchange fluid distribution branch pipe group No. 2 pipe, 2-3 is a first heat exchange fluid distribution branch pipe group No. 3 pipe, 2-4 is a first heat exchange fluid distribution branch pipe group No. 4 pipe, 2-5 is a first heat exchange fluid distribution branch pipe group No. 5 pipe, 2-6 is a first heat exchange fluid distribution branch pipe group No. 6 pipe; 3-1 is No. 1 compact heat exchanger, 3-2 is No. 2 compact heat exchanger, 3-3 is No. 3 compact heat exchanger, 3-4 is No. 4 compact heat exchanger, 3-5 is No. 5 compact heat exchanger, 3-6 is No. 6 compact heat exchanger; 3-1-1 is a first heat exchange fluid inlet header, 3-1-2 is a first heat exchange fluid outlet header, 3-1-3 is a second heat exchange fluid inlet header, 3-1-4 is a second heat exchange fluid outlet header, 3-1-5 is a core; 4-1 is a first heat exchange fluid collection branch pipe group No. 1 pipe, 4-2 is a first heat exchange fluid collection branch pipe group No. 2 pipe, 4-3 is a first heat exchange fluid collection branch pipe group No. 3 pipe, 4-4 is a first heat exchange fluid collection branch pipe group No. 4 pipe, 4-5 is a first heat exchange fluid collection branch pipe group No. 5 pipe, 4-6 is a first heat exchange fluid collection branch pipe group No. 6 pipe; 7-1 is a second heat exchange fluid distribution branch pipe group No. 1 pipe, 7-2 is a second heat exchange fluid distribution branch pipe group No. 2 pipe, 7-3 is a second heat exchange fluid distribution branch pipe group No. 3 pipe, 7-4 is a second heat exchange fluid distribution branch pipe group No. 4 pipe, 7-5 is a second heat exchange fluid distribution branch pipe group No. 5 pipe, 7-6 is a second heat exchange fluid distribution branch pipe group No. 6 pipe; 8-1 is a second heat exchange fluid collection branch pipe group No. 1 pipe, 8-2 is a second heat exchange fluid collection branch pipe group No. 2 pipe, 8-3 is a second heat exchange fluid collection branch pipe group No. 3 pipe, 8-4 is a second heat exchange fluid collection branch pipe group No. 4 pipe, 8-5 is a second heat exchange fluid collection branch pipe group No. 5 pipe, 8-6 is a second heat exchange fluid collection branch pipe group No. 6 pipe. DETAILED DESCRIPTION

[0030] The present application will be further described in conjunction with the accompanying drawings and specific embodiments, which are explanatory rather than limiting:

[0031] As Figure 2The compact heat exchanger pipe network system of the present application for uniformly distributing flow comprises a first heat exchange fluid distribution header 1, a first heat exchange fluid distribution branch pipe group 2, a compact heat exchanger group 3, a first heat exchange fluid collection branch pipe group 4, a first heat exchange fluid collection header 5, a second heat exchange fluid distribution header 6, a second heat exchange fluid distribution branch pipe group 7, a second heat exchange fluid collection branch pipe group 8, and a second heat exchange fluid collection header 9.

[0032] The first heat exchange fluid distribution branch pipe group 2 comprises a plurality of first heat exchange fluid distribution branch pipes radially distributed around the first heat exchange fluid distribution header 1, the inlets of all the first heat exchange fluid distribution branch pipes being connected to the outlet of the first heat exchange fluid distribution header 1; the compact heat exchanger group 3 comprises a plurality of compact heat exchangers, the outlet of each first heat exchange fluid distribution branch pipe being connected to the first side inlet of a compact heat exchanger; the first heat exchange fluid collection branch pipe group 4 comprises a plurality of first heat exchange fluid collection branch pipes radially distributed around the first heat exchange fluid collection header 5, the inlet of each first heat exchange fluid collection branch pipe being connected to the first side outlet of a compact heat exchanger, and the outlets of all the first heat exchange fluid collection branch pipes being connected to the inlet of the first heat exchange fluid collection header 5.

[0033] The second heat exchange fluid distribution branch pipe group 7 comprises a plurality of second heat exchange fluid distribution branch pipes radially distributed around the second heat exchange fluid distribution header 6, the inlets of all the second heat exchange fluid distribution branch pipes being connected to the outlet of the second heat exchange fluid distribution header 6; the outlet of each second heat exchange fluid distribution branch pipe being connected to the second side inlet of a compact heat exchanger; the second heat exchange fluid collection branch pipe group 8 comprises a plurality of second heat exchange fluid collection branch pipes radially distributed around the second heat exchange fluid collection header 9, the inlet of each second heat exchange fluid collection branch pipe being connected to the second side outlet of a compact heat exchanger, and the outlets of all the second heat exchange fluid collection branch pipes being connected to the inlet of the second heat exchange fluid collection header 9.

[0034] In a preferred embodiment of the present application, the first heat exchange fluid distribution branch pipes in the first heat exchange fluid distribution branch pipe group 2 are of equal length, the first heat exchange fluid collection branch pipes in the first heat exchange fluid collection branch pipe group 4 are of equal length, the second heat exchange fluid distribution branch pipes in the second heat exchange fluid distribution branch pipe group 7 are of equal length, and the second heat exchange fluid collection branch pipes in the second heat exchange fluid collection branch pipe group 8 are of equal length.

[0035] In a preferred embodiment of the present application, the angle between adjacent first heat exchange fluid distribution branches is 360° / M, M being the number of first heat exchange fluid distribution branches; the angle between adjacent first heat exchange fluid collection branches is 360° / N, N being the number of first heat exchange fluid collection branches; the angle between adjacent second heat exchange fluid distribution branches is 360° / O, O being the number of second heat exchange fluid distribution branches; the angle between adjacent second heat exchange fluid collection branches is 360° / P, P being the number of second heat exchange fluid collection branches.

[0036] As a further optimization, the first heat exchange fluid distribution branches in the first heat exchange fluid distribution branch group 2 are symmetrically distributed with the first heat exchange fluid distribution header 1 as the center, the first heat exchange fluid collection branches in the first heat exchange fluid collection branch group 4 are symmetrically distributed with the first heat exchange fluid collection header 5 as the center, the second heat exchange fluid distribution branches in the second heat exchange fluid distribution branch group 7 are symmetrically distributed with the second heat exchange fluid distribution header 6 as the center, and the second heat exchange fluid collection branches in the second heat exchange fluid collection branch group 8 are symmetrically distributed with the second heat exchange fluid collection header 9 coaxially arranged as the center.

[0037] As Figure 5 In a preferred embodiment of the present application, the compact heat exchanger in the compact heat exchanger group 3 comprises a first heat exchange fluid inlet header 3-1-1, a first heat exchange fluid outlet header 3-1-2, a second heat exchange fluid inlet header 3-1-3, a second heat exchange fluid outlet header 3-1-4, and a core 3-1-5; the first heat exchange fluid inlet header 3-1-1 is connected with the first heat exchange fluid distribution branch, the first heat exchange fluid outlet header 3-1-2 is connected with the first heat exchange fluid collection branch; the second heat exchange fluid inlet header 3-1-3 is connected with the second heat exchange fluid distribution branch, and the second heat exchange fluid outlet header 3-1-4 is connected with the second heat exchange fluid collection branch; the first heat exchange fluid and the second heat exchange fluid exchange heat in the heat exchange channel in the core 3-1-5.

[0038] As a further optimization, the first heat exchange fluid and the second heat exchange fluid counterflow exchange heat in the core 3-1-5.

[0039] In a preferred embodiment of the present application, the total mass flow of the first heat exchange fluid in the first heat exchange fluid distribution header 1 is equal to the total mass flow of the first heat exchange fluid in the first heat exchange fluid collection header 5; the total mass flow of the second heat exchange fluid in the second heat exchange fluid distribution header 6 is equal to the total mass flow of the second heat exchange fluid in the second heat exchange fluid collection header 9.

[0040] In a preferred embodiment of the present application, the mass flow rate of each first heat exchange fluid branch pipe in the first heat exchange fluid branch pipe group 2 is equal, and the sum is equal to the total mass flow rate of the first heat exchange fluid; the mass flow rate of each first heat exchange fluid branch pipe in the first heat exchange fluid branch pipe group 4 is equal, and the sum is equal to the total mass flow rate of the first heat exchange fluid; the mass flow rate of each second heat exchange fluid branch pipe in the second heat exchange fluid branch pipe group 7 is equal, and the sum is equal to the total mass flow rate of the second heat exchange fluid; the mass flow rate of each second heat exchange fluid branch pipe in the second heat exchange fluid branch pipe group 8 is equal, and the sum is equal to the total mass flow rate of the second heat exchange fluid.

[0041] In a preferred embodiment of the present application, all the compact heat exchangers in the compact heat exchanger group 3 are distributed on the same plane.

[0042] The working method of the above-mentioned compact heat exchanger pipe network system with uniform distribution of flow rate comprises:

[0043] The first heat exchange fluid is distributed into each first heat exchange fluid branch pipe in the first heat exchange fluid branch pipe group 2 from the first heat exchange fluid distribution header 1, and then into each compact heat exchanger in the compact heat exchanger group 3; the second heat exchange fluid is distributed into each second heat exchange fluid branch pipe in the second heat exchange fluid branch pipe group 7 from the second heat exchange fluid distribution header 6, and then into each compact heat exchanger in the compact heat exchanger group 3;

[0044] The first heat exchange fluid and the second heat exchange fluid complete heat exchange in the compact heat exchanger;

[0045] After completing heat exchange, the first heat exchange fluid is collected in the first heat exchange fluid collection header 5 from each first heat exchange fluid collection branch pipe in the first heat exchange fluid collection branch pipe group 4, and then flows out of the system; the second heat exchange fluid is collected in the second heat exchange fluid collection header 9 from each second heat exchange fluid collection branch pipe in the second heat exchange fluid collection branch pipe group 8, and then flows out of the system.

[0046] The present application will be further explained and described below with a specific embodiment:

[0047] In this embodiment, as Figure 3 The first heat exchange fluid branch pipe group 2 includes six first heat exchange fluid branch pipes of equal length, which are distributed radially, i.e., the first heat exchange fluid branch pipe group No. 1 pipe 2-1, the first heat exchange fluid branch pipe group No. 2 pipe 2-2, the first heat exchange fluid branch pipe group No. 3 pipe 2-3, the first heat exchange fluid branch pipe group No. 4 pipe 2-4, the first heat exchange fluid branch pipe group No. 5 pipe 2-5, and the first heat exchange fluid branch pipe group No. 6 pipe 2-6.

[0048] The first heat exchange fluid collecting branch pipe group 4 includes six first heat exchange fluid collecting branch pipes of equal length distributed radially, a first heat exchange fluid collecting branch pipe group No. 1 pipe 4-1, a first heat exchange fluid collecting branch pipe group No. 2 pipe 4-2, a first heat exchange fluid collecting branch pipe group No. 3 pipe 4-3, a first heat exchange fluid collecting branch pipe group No. 4 pipe 4-4, a first heat exchange fluid collecting branch pipe group No. 5 pipe 4-5, and a first heat exchange fluid collecting branch pipe group No. 6 pipe 4-6.

[0049] The first heat exchange fluid collecting branch pipe group No. 1 pipe 4-1, the first heat exchange fluid collecting branch pipe group No. 2 pipe 4-2, the first heat exchange fluid collecting branch pipe group No. 3 pipe 4-3, the first heat exchange fluid collecting branch pipe group No. 4 pipe 4-4, the first heat exchange fluid collecting branch pipe group No. 5 pipe 4-5, and the first heat exchange fluid collecting branch pipe group No. 6 pipe 4-6 are distributed symmetrically about the first heat exchange fluid collecting header 5.

[0050] The compact heat exchanger group 3 includes a No. 1 compact heat exchanger 3-1, a No. 2 compact heat exchanger 3-2, a No. 3 compact heat exchanger 3-3, a No. 4 compact heat exchanger 3-4, a No. 5 compact heat exchanger 3-5, and a No. 6 compact heat exchanger 3-6.

[0051] The first heat exchange fluid collecting branch pipe group No. 1 pipe 4-1, the first heat exchange fluid collecting branch pipe group No. 2 pipe 4-2, the first heat exchange fluid collecting branch pipe group No. 3 pipe 4-3, the first heat exchange fluid collecting branch pipe group No. 4 pipe 4-4, the first heat exchange fluid collecting branch pipe group No. 5 pipe 4-5, and the first heat exchange fluid collecting branch pipe group No. 6 pipe 4-6 are distributed symmetrically about the first heat exchange fluid collecting header 5.

[0052] The first heat exchange fluid collecting branch pipe group No. 1 pipe 4-1, the first heat exchange fluid collecting branch pipe group No. 2 pipe 4-2, the first heat exchange fluid collecting branch pipe group No. 3 pipe 4-3, the first heat exchange fluid collecting branch pipe group No. 4 pipe 4-4, the first heat exchange fluid collecting branch pipe group No. 5 pipe 4-5, and the first heat exchange fluid collecting branch pipe group No. 6 pipe 4-6 are distributed symmetrically about the first heat exchange fluid collecting header 5.

[0053] AsFigure 4 The second heat exchange fluid distribution branch pipe group 7 includes a second heat exchange fluid distribution branch pipe group No. 1 pipe 7-1, a second heat exchange fluid distribution branch pipe group No. 2 pipe 7-2, a second heat exchange fluid distribution branch pipe group No. 3 pipe 7-3, a second heat exchange fluid distribution branch pipe group No. 4 pipe 7-4, a second heat exchange fluid distribution branch pipe group No. 5 pipe 7-5, and a second heat exchange fluid distribution branch pipe group No. 6 pipe 7-6.

[0054] The second heat exchange fluid distribution branch pipe group 7 includes a second heat exchange fluid distribution branch pipe group No. 1 pipe 7-1, a second heat exchange fluid distribution branch pipe group No. 2 pipe 7-2, a second heat exchange fluid distribution branch pipe group No. 3 pipe 7-3, a second heat exchange fluid distribution branch pipe group No. 4 pipe 7-4, a second heat exchange fluid distribution branch pipe group No. 5 pipe 7-5, and a second heat exchange fluid distribution branch pipe group No. 6 pipe 7-6.

[0055] The second heat exchange fluid distribution branch pipe group 7 includes a second heat exchange fluid distribution branch pipe group No. 1 pipe 7-1, a second heat exchange fluid distribution branch pipe group No. 2 pipe 7-2, a second heat exchange fluid distribution branch pipe group No. 3 pipe 7-3, a second heat exchange fluid distribution branch pipe group No. 4 pipe 7-4, a second heat exchange fluid distribution branch pipe group No. 5 pipe 7-5, and a second heat exchange fluid distribution branch pipe group No. 6 pipe 7-6.

[0056] The second heat exchange fluid distribution branch pipe group 7 includes a second heat exchange fluid distribution branch pipe group No. 1 pipe 7-1, a second heat exchange fluid distribution branch pipe group No. 2 pipe 7-2, a second heat exchange fluid distribution branch pipe group No. 3 pipe 7-3, a second heat exchange fluid distribution branch pipe group No. 4 pipe 7-4, a second heat exchange fluid distribution branch pipe group No. 5 pipe 7-5, and a second heat exchange fluid distribution branch pipe group No. 6 pipe 7-6.

[0057] The second heat exchange fluid collecting branch pipe group No. 8-1, the second heat exchange fluid collecting branch pipe group No. 8-2, the second heat exchange fluid collecting branch pipe group No. 8-3, the second heat exchange fluid collecting branch pipe group No. 8-4, the second heat exchange fluid collecting branch pipe group No. 8-5, the second heat exchange fluid collecting branch pipe group No. 8-6, the No. 1 compact heat exchanger 3-1, the No. 2 compact heat exchanger 3-2, the No. 3 compact heat exchanger 3-3, the No. 4 compact heat exchanger 3-4, the No. 5 compact heat exchanger 3-5 and the No. 6 compact heat exchanger 3-6 are symmetrically distributed about the second heat exchange fluid collecting header 9.

[0058] The angle between adjacent first heat exchange fluid branch pipes is 60°, the angle between adjacent first heat exchange fluid collecting branch pipes is 60°, the angle between adjacent second heat exchange fluid branch pipes is 60°, and the angle between adjacent second heat exchange fluid collecting branch pipes is 60°.

[0059] As shown in Figure 5 , taking the No. 1 compact heat exchanger 3-1 as an example, it comprises a first heat exchange fluid inlet header 3-1-1, a first heat exchange fluid outlet header 3-1-2, a second heat exchange fluid inlet header 3-1-3, a second heat exchange fluid outlet header 3-1-4 and a core 3-1-5. The connection structure of the remaining compact heat exchangers is the same.

[0060] As shown in Figure 2 , 3 , the first and second heat exchange fluids participating in heat exchange are each evenly distributed into 6 substreams in the compact heat exchanger pipe network of the application. The connection sequence is described taking one substream of the first and second heat exchange fluids as an example, as shown in Figure 5 . The first heat exchange fluid branch pipe group No. 2-1 outlet is connected to the first heat exchange fluid inlet header 3-1-1, the first heat exchange fluid outlet header 3-1-2 is connected to the first heat exchange fluid collecting branch pipe group No. 4-1 inlet, and the first heat exchange fluid collecting branch pipe group No. 4-1 outlet converges at the first heat exchange fluid collecting header 5 inlet. The second heat exchange fluid branch pipe group No. 7-1 outlet is connected to the second heat exchange fluid inlet header 3-1-3, the second heat exchange fluid outlet header 3-1-4 is connected to the second heat exchange fluid collecting branch pipe group No. 8-1 inlet, and the second heat exchange fluid collecting branch pipe group No. 8-1 outlet converges at the second heat exchange fluid collecting header 9 inlet.

[0061] The flow heat exchange process is as follows:

[0062] The first heat exchange fluid flows through the first heat exchange fluid distribution branch pipe group No. 2-1, the first heat exchange fluid inlet header 3-1-1 and the core 3-1-5 heat exchange channel in sequence. The second heat exchange fluid flows through the second heat exchange fluid distribution branch pipe group No. 7-1, the second heat exchange fluid inlet header 3-1-3 and the core 3-1-5 heat exchange channel in sequence. The first and second heat exchange fluids perform counter-flow heat exchange between the heat exchange channels of the core 3-1-5. After the heat exchange is completed, the first heat exchange fluid flows through the first heat exchange fluid outlet header 3-1-2 and the first heat exchange fluid flow branch pipe group No. 4-1 in sequence, and is collected with the other five first heat exchange fluids in the first heat exchange fluid flow header 5. The second heat exchange fluid flows through the second heat exchange fluid outlet header 3-1-4 and the second heat exchange fluid flow branch pipe group No. 8-1 in sequence, and is collected with the other five second heat exchange fluids in the second heat exchange fluid flow header 9.

[0063] During the flow and heat exchange of the above-mentioned six first heat exchange fluids and second heat exchange fluids, the mass flow of each fluid is 1 / 6 of the total mass flow, and the heat exchange amount is 1 / 6 of the total heat exchange amount.

[0064] It should be noted that the above-mentioned embodiment gives a heat exchanger network composed of six compact heat exchangers and pipe networks, and the same method can also be applied to a heat exchanger network composed of other numbers of compact heat exchangers and pipe networks.

[0065] The above only describes the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, or make equivalent structures or equivalent flow changes according to the content of the present application and the drawings, or directly or indirectly apply to other related technical fields, which should be covered in the protection scope of the present application.

Claims

1. A compact heat exchanger piping system with uniform flow distribution, characterized in that, It includes a first heat exchange fluid distribution manifold (1), a first heat exchange fluid distribution branch pipe group (2), a compact heat exchanger group (3), a first heat exchange fluid manifold group (4), a first heat exchange fluid manifold (5), a second heat exchange fluid distribution manifold (6), a second heat exchange fluid distribution branch pipe group (7), a second heat exchange fluid manifold group (8), and a second heat exchange fluid manifold (9). The first heat exchange fluid branch pipe group (2) includes several first heat exchange fluid branch pipes radially distributed around the first heat exchange fluid branch manifold (1), and the inlet of all the first heat exchange fluid branch pipes is connected to the outlet of the first heat exchange fluid branch manifold (1); the compact heat exchanger group (3) includes several compact heat exchangers, not two compact heat exchangers, and the outlet of each first heat exchange fluid branch pipe is connected to the first side inlet of a compact heat exchanger; the first heat exchange fluid manifold group (4) includes several first heat exchange fluid manifolds radially distributed around the first heat exchange fluid manifold (5), and the inlet of each first heat exchange fluid manifold is connected to the first side outlet of a compact heat exchanger, and the outlet of all the first heat exchange fluid manifolds is connected to the inlet of the first heat exchange fluid manifold (5); The second heat exchange fluid branch pipe group (7) includes several second heat exchange fluid branch pipes that are radially distributed around the second heat exchange fluid branch manifold (6). The inlet of all the second heat exchange fluid branch pipes is connected to the outlet of the second heat exchange fluid branch manifold (6). The outlet of each second heat exchange fluid branch pipe is connected to the second side inlet of a compact heat exchanger. The second heat exchange fluid manifold group (8) includes several second heat exchange fluid manifolds that are radially distributed around the second heat exchange fluid manifold (9). The inlet of each second heat exchange fluid manifold is connected to the second side outlet of a compact heat exchanger. The outlet of all the second heat exchange fluid manifolds is connected to the inlet of the second heat exchange fluid manifold (9). The angle between adjacent first heat exchange fluid branch pipes is 360° / M, where M is the number of first heat exchange fluid branch pipes; the angle between adjacent first heat exchange fluid junction pipes is 360° / N, where N is the number of first heat exchange fluid junction pipes; the angle between adjacent second heat exchange fluid branch pipes is 360° / O, where O is the number of second heat exchange fluid branch pipes; the angle between adjacent second heat exchange fluid junction pipes is 360° / P, where P is the number of second heat exchange fluid junction pipes. The first heat exchange fluid branch pipes in the first heat exchange fluid branch pipe group (2) are symmetrically distributed with the first heat exchange fluid branch manifold (1) as the center; the first heat exchange fluid junction pipes in the first heat exchange fluid branch pipe group (4) are symmetrically distributed with the first heat exchange fluid junction manifold (5) as the center; the second heat exchange fluid branch pipes in the second heat exchange fluid branch pipe group (7) are symmetrically distributed with the second heat exchange fluid branch manifold (6) as the center; and the second heat exchange fluid junction pipes in the second heat exchange fluid branch pipe group (8) are symmetrically distributed with the second heat exchange fluid junction manifold (9) coaxially arranged. The compact heat exchanger in the compact heat exchanger assembly (3) includes a first heat exchange fluid inlet header (3-1-1), a first heat exchange fluid outlet header (3-1-2), a second heat exchange fluid inlet header (3-1-3), a second heat exchange fluid outlet header (3-1-4), and a core (3-1-5); the first heat exchange fluid inlet header (3-1-1) is connected to the first heat exchange fluid branch pipe, and the first heat exchange fluid outlet header (3-1-2) is connected to the first heat exchange fluid manifold; the second heat exchange fluid inlet header (3-1-3) is connected to the second heat exchange fluid branch pipe, and the second heat exchange fluid outlet header (3-1-4) is connected to the second heat exchange fluid manifold; the first heat exchange fluid and the second heat exchange fluid exchange heat in the heat exchange channel in the core (3-1-5); the first heat exchange fluid and the second heat exchange fluid exchange heat countercurrently in the core (3-1-5).

2. The compact heat exchanger network system with uniform flow distribution according to claim 1, characterized in that, Several first heat exchange fluid branch pipes in the first heat exchange fluid branch pipe group (2) are of equal length, several first heat exchange fluid converging branch pipes in the first heat exchange fluid branch pipe group (4) are of equal length, several second heat exchange fluid branch pipes in the second heat exchange fluid branch pipe group (7) are of equal length, and several second heat exchange fluid converging branch pipes in the second heat exchange fluid branch pipe group (8) are of equal length.

3. The compact heat exchanger network system with uniform flow distribution according to claim 1, characterized in that, The total mass flow rate of the first heat exchange fluid in the first heat exchange fluid distribution manifold (1) is equal to that in the first heat exchange fluid confluence manifold (5); the total mass flow rate of the second heat exchange fluid in the second heat exchange fluid distribution manifold (6) is equal to that in the second heat exchange fluid confluence manifold (9).

4. The compact heat exchanger network system with uniform flow distribution according to claim 1, characterized in that, In the first heat exchange fluid branch pipe group (2), the mass flow rate of each first heat exchange fluid branch pipe is equal, and the sum is equal to the total mass flow rate of the first heat exchange fluid; in the first heat exchange fluid manifold pipe group (4), the mass flow rate of each first heat exchange fluid manifold pipe is equal, and the sum is equal to the total mass flow rate of the first heat exchange fluid; in the second heat exchange fluid branch pipe group (7), the mass flow rate of each second heat exchange fluid branch pipe is equal, and the sum is equal to the total mass flow rate of the second heat exchange fluid; in the second heat exchange fluid manifold pipe group (8), the mass flow rate of each second heat exchange fluid manifold pipe is equal, and the sum is equal to the total mass flow rate of the second heat exchange fluid.

5. The compact heat exchanger network system with uniform flow distribution according to claim 1, characterized in that, All compact heat exchangers in the compact heat exchanger group (3) are distributed on the same plane.

6. The operating method of the compact heat exchanger network system with uniform flow distribution as described in claims 1-5, characterized in that, include: The first heat exchange fluid is diverted from the first heat exchange fluid diversion manifold (1) into each of the first heat exchange fluid diversion branch pipes in the first heat exchange fluid diversion branch pipe group (2), and then into each of the compact heat exchangers in the compact heat exchanger group (3); the second heat exchange fluid is diverted from the second heat exchange fluid diversion manifold (6) into each of the second heat exchange fluid diversion branch pipes in the second heat exchange fluid diversion branch pipe group (7), and then into each of the compact heat exchangers in the compact heat exchanger group (3). The first and second heat exchange fluids complete heat exchange in a compact heat exchanger; After heat exchange is completed, the first heat exchange fluid is collected from each of the first heat exchange fluid manifolds in the first heat exchange fluid manifold group (4) and flows out of the system; the second heat exchange fluid is collected from each of the second heat exchange fluid manifolds in the second heat exchange fluid manifold group (8) and flows out of the system.

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