Compact heat exchanger pipe network system capable of achieving uniform flow rate allocation, and working method therefor

Abstract

The present invention relates to the technical field of heat exchange. Disclosed are a compact heat exchanger pipe network system capable of achieving uniform flow rate allocation, and a working method therefor. A plurality of flow rate allocation branch pipes which are distributed in a radial shape and have equal lengths are divided at an outlet of a heat exchange fluid flow rate allocation manifold pipe; the angles between the adjacent flow rate allocation branch pipes are equal; the flow rate allocation branch pipes and flow rate converging branch pipes are connected to compact heat exchangers; and outlets of the plurality of flow rate converging branch pipes which are distributed in a radial shape and have equal lengths are converged at a flow rate converging manifold pipe. Flow heat exchange paths of all heat exchange fluids flowing through the flow rate allocation branch pipes, the flow rate converging branch pipes, and the compact heat exchangers have equal lengths and are symmetrically distributed, so that path friction loss and local friction loss at the equal-distance paths from the manifold pipes to all the heat exchange fluids are equal, and the flow rates allocated by means of the branch pipes and the compact heat exchangers are consistent under equal pressure difference driving, and thus the working loads of the compact heat exchangers in a heat exchange system are basically consistent, thereby guaranteeing the safe and stable operation of the heat exchange system.

Description

A compact heat exchanger pipe network system with uniform flow distribution and its working method Technical Field

[0001] The present invention belongs to the technical field of heat exchange, and in particular relates to a compact heat exchanger pipe network system for evenly distributing flow and a working method thereof. Background Art

[0002] The use of compact heat exchangers in high-load heat exchange scenarios is due to the limitations of the manufacturing process of a single heat exchanger. Multiple compact heat exchangers need to be connected in series and parallel to form a heat exchanger network to meet the heat exchange needs.

[0003] For the parallel arrangement of multiple compact heat exchangers, the most common flow distribution methods are U-shaped and Z-shaped multi-branch parallel pipe networks. Multi-branch parallel pipe networks consist of diversion headers, parallel branches, and converging headers. In the Z-shaped multi-branch parallel compact heat exchanger pipe network shown in Figure 1, the two heat exchange fluids flow into their respective diversion headers. Through the parallel branches between the diversion headers and the converging header, the flow distribution is achieved, and they flow into each compact heat exchanger. After heat exchange is completed, they are again collected at the converging header through the parallel branches between the two headers and flow out of the heat exchanger network. However, due to the inherent characteristics of multi-branch parallel pipe networks, the fluid flow distribution of each branch and each heat exchanger is uneven. As the number of parallel branches increases, the flow distribution deviation increases. Under high-temperature conditions, pipes with low flow rates are prone to overheating and bursting, and heat exchangers with high flow rates are overloaded, posing a threat to the safe and stable operation of the heat exchange system.

[0004] Summary of the Invention

[0005] In order to solve the above-mentioned existing problems, the purpose of the present invention is to provide a compact heat exchanger pipe network system with uniform flow distribution and its working method, which can achieve uniform flow distribution among each branch pipe and each heat exchanger, solve a series of problems caused by uneven flow distribution in the compact heat exchanger network, and ensure the safe and stable operation of the heat exchange system.

[0006] The present invention is achieved through the following technical solutions:

[0007] The present invention discloses a compact heat exchanger pipe network system for uniformly distributing flow, comprising a first heat exchange fluid diversion header, a first heat exchange fluid diversion branch pipe group, a compact heat exchanger group, a first heat exchange fluid converging branch pipe group, a first heat exchange fluid converging header, a second heat exchange fluid diversion header, a second heat exchange fluid diversion branch pipe group, a second heat exchange fluid converging branch pipe group, and a second heat exchange fluid converging header;

[0008] The first heat exchange fluid branch pipe group includes a plurality of first heat exchange fluid branch pipes radially distributed with the first heat exchange fluid branch pipe as the center, and the inlets of all the first heat exchange fluid branch pipes are connected to the outlet of the first heat exchange fluid branch pipe; the compact heat exchanger group includes a plurality of compact heat exchangers, and the outlet of each first heat exchange fluid branch pipe is respectively connected to the first side inlet of a compact heat exchanger; the first heat exchange fluid converging branch pipe group includes a plurality of first heat exchange fluid converging branch pipes radially distributed with the first heat exchange fluid converging manifold as the center, and the inlet of each first heat exchange fluid converging branch pipe is respectively connected to the first side outlet of a compact heat exchanger, and the outlets of all the first heat exchange fluid converging branch pipes are connected to the inlet of the first heat exchange fluid converging manifold;

[0009] The second heat exchange fluid diversion branch pipe group includes a plurality of second heat exchange fluid diversion branch pipes radially distributed with the second heat exchange fluid diversion manifold as the center, and the inlets of all second heat exchange fluid diversion branch pipes are connected to the outlet of the second heat exchange fluid diversion manifold; the outlet of each second heat exchange fluid diversion branch pipe is respectively connected to the second side inlet of a compact heat exchanger; the second heat exchange fluid converging branch pipe group includes a plurality of second heat exchange fluid converging branch pipes radially distributed with the second heat exchange fluid converging manifold as the center, the inlet of each second heat exchange fluid converging branch pipe is respectively connected to the second side outlet of a compact heat exchanger, and the outlets of all second heat exchange fluid converging branch pipes are connected to the inlet of the second heat exchange fluid converging manifold.

[0010] Preferably, the several first heat exchange fluid diversion branch tubes in the first heat exchange fluid diversion branch tube group are of equal length, the several first heat exchange fluid converging branch tubes in the first heat exchange fluid converging branch tube group are of equal length, the several second heat exchange fluid diversion branch tubes in the second heat exchange fluid diversion branch tube group are of equal length, and the several second heat exchange fluid converging branch tubes in the second heat exchange fluid converging branch tube group are of equal length.

[0011] Preferably, the angle between adjacent first heat exchange fluid diversion branches is 360° / M, where M is the number of first heat exchange fluid diversion branches; the angle between adjacent first heat exchange fluid converging branches is 360° / N, where N is the number of first heat exchange fluid converging branches; the angle between adjacent second heat exchange fluid diversion branches is 360° / O, where O is the number of second heat exchange fluid diversion branches; and the angle between adjacent second heat exchange fluid converging branches is 360° / P, where P is the number of second heat exchange fluid converging branches.

[0012] Further preferably, several first heat exchange fluid diversion branch tubes in the first heat exchange fluid diversion branch tube group are symmetrically distributed with the first heat exchange fluid diversion header as the center, several first heat exchange fluid confluence branch tubes in the first heat exchange fluid confluence branch tube group are symmetrically distributed with the first heat exchange fluid confluence header as the center, several second heat exchange fluid diversion branch tubes in the second heat exchange fluid diversion branch tube group are symmetrically distributed with the second heat exchange fluid diversion header as the center, and several second heat exchange fluid confluence branch tubes in the second heat exchange fluid confluence branch tube group are coaxially arranged with the second heat exchange fluid confluence header and are symmetrically distributed with the center.

[0013] Preferably, the compact heat exchanger in the compact heat exchanger group includes 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 body; the first heat exchange fluid inlet header is connected to the first heat exchange fluid branch pipe, and the first heat exchange fluid outlet header is connected to the first heat exchange fluid converging branch pipe; the second heat exchange fluid inlet header is connected to the second heat exchange fluid branch pipe, and the second heat exchange fluid outlet header is connected to the second heat exchange fluid converging branch pipe; the first heat exchange fluid and the second heat exchange fluid exchange heat in the heat exchange channel in the core body.

[0014] Further preferably, the first heat exchange fluid and the second heat exchange fluid perform countercurrent heat exchange in the core.

[0015] Preferably, the total mass flow of the first heat exchange fluid in the first heat exchange fluid diversion header and the first heat exchange fluid converging header is equal; the total mass flow of the second heat exchange fluid in the second heat exchange fluid diversion header and the second heat exchange fluid converging header is equal.

[0016] Preferably, the mass flow rate of each first heat exchange fluid diversion branch pipe in the first heat exchange fluid diversion branch pipe group 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 converging branch pipe in the first heat exchange fluid converging branch pipe group 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 diversion branch pipe in the second heat exchange fluid diversion branch pipe group 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 converging branch pipe in the second heat exchange fluid converging branch pipe group is equal, and the sum is equal to the total mass flow rate of the second heat exchange fluid.

[0017] Preferably, all compact heat exchangers in the compact heat exchanger group are distributed on the same plane.

[0018] The working method of the above-mentioned compact heat exchanger pipe network system with uniform flow distribution disclosed in the present invention includes:

[0019] The first heat exchange fluid is branched by the first heat exchange fluid branching header and enters each first heat exchange fluid branching pipe in the first heat exchange fluid branching pipe group, and then respectively enters each compact heat exchanger in the compact heat exchanger group; the second heat exchange fluid is branched by the second heat exchange fluid branching header and enters each second heat exchange fluid branching pipe in the second heat exchange fluid branching pipe group, and then respectively enters each compact heat exchanger in the compact heat exchanger group;

[0020] The first heat exchange fluid and the second heat exchange fluid complete heat exchange in the compact heat exchanger;

[0021] After the heat exchange is completed, the first heat exchange fluid is collected by each first heat exchange fluid confluence branch tube in the first heat exchange fluid confluence branch tube group into the first heat exchange fluid confluence header and flows out of the system; the second heat exchange fluid is collected by each second heat exchange fluid confluence branch tube in the second heat exchange fluid confluence branch tube group into the second heat exchange fluid confluence header and flows out of the system.

[0022] Compared with the prior art, the present invention has the following beneficial technical effects:

[0023] The present invention discloses a compact heat exchanger pipe network system that evenly distributes flow. The outlet of a heat exchange fluid diversion manifold branches out into a plurality of radially distributed diversion branches of equal length. Each diversion branch connects to a converging branch in a compact heat exchanger, and the outlets of the radially distributed converging branches of equal length converge at the converging manifold. The heat exchange paths of the heat exchange fluids flowing through the diversion branches, converging branches, and compact heat exchangers are of equal length and symmetrically distributed, ensuring that the resistance loss along the path from the manifold to each heat exchange fluid at equal distances and the local resistance loss are equal. Driven by equal pressure differences, the flow distribution of each branch and each compact heat exchanger is consistent, ensuring that the workload of each compact heat exchanger in the heat exchange system is essentially consistent, thus ensuring the safe and stable operation of the heat exchange system.

[0024] The working method of the above-mentioned compact heat exchanger pipe network system with uniform flow distribution disclosed in the present invention has a simple structure and no additional components. It can achieve uniform flow distribution by only slightly modifying the original U-shaped and Z-shaped multi-branch parallel pipe networks. It can be widely used in new heat exchange pipe network systems and the transformation of existing heat exchange pipe network systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic diagram of a Z-shaped multi-branch parallel compact heat exchanger pipe network in the prior art;

[0026] FIG2 is a schematic diagram of the overall structure of the system of the present invention;

[0027] FIG3 is a schematic structural diagram of a first heat exchange fluid flow path and components in a system according to an embodiment;

[0028] FIG4 is a schematic structural diagram of the flow path and components of the second heat exchange fluid in the system of the embodiment;

[0029] FIG5 is a schematic structural diagram of a single heat exchange fluid flow path and components in the system of the embodiment.

[0030] In the figure: 1 is the first heat exchange fluid diversion manifold, 2 is the first heat exchange fluid diversion branch pipe group, 3 is the compact heat exchanger group, 4 is the first heat exchange fluid converging branch pipe group, 5 is the first heat exchange fluid converging manifold, 6 is the second heat exchange fluid diversion manifold, 7 is the second heat exchange fluid diversion branch pipe group, 8 is the second heat exchange fluid converging branch pipe group, 9 is the second heat exchange fluid converging manifold; 2-1 is the first heat exchange fluid diversion branch pipe group No. 1 pipe, 2-2 is the first heat exchange fluid diversion branch pipe group No. 2 pipe, 2-3 is the first heat exchange fluid diversion branch pipe group No. 3 pipe, 2 -4 is the No. 4 pipe of the first heat exchange fluid branch pipe group, 2-5 is the No. 5 pipe of the first heat exchange fluid branch pipe group, 2-6 is the No. 6 pipe of the first heat exchange fluid branch pipe group; 3-1 is the No. 1 compact heat exchanger, 3-2 is the No. 2 compact heat exchanger, 3-3 is the No. 3 compact heat exchanger, 3-4 is the No. 4 compact heat exchanger, 3-5 is the No. 5 compact heat exchanger, 3-6 is the No. 6 compact heat exchanger; 3-1-1 is the first heat exchange fluid inlet header, 3-1-2 is the first heat exchange fluid outlet header, 3-1-3 is the second heat exchange fluid outlet header, The inlet header of the heat exchange fluid is 3-1-4, the outlet header of the second heat exchange fluid is 3-1-5, the core is 4-1, the No. 1 pipe of the first heat exchange fluid confluence branch pipe group, 4-2, the No. 2 pipe of the first heat exchange fluid confluence branch pipe group, 4-3, the No. 3 pipe of the first heat exchange fluid confluence branch pipe group, 4-4, the No. 4 pipe of the first heat exchange fluid confluence branch pipe group, 4-5, the No. 5 pipe of the first heat exchange fluid confluence branch pipe group, and 4-6, the No. 6 pipe of the first heat exchange fluid confluence branch pipe group; 7-1, the No. 1 pipe of the second heat exchange fluid branch pipe group, and 7-2, the No. 1 pipe of the second heat exchange fluid branch pipe group. Group No. 2 pipe, 7-3 is the second heat exchange fluid branch pipe group No. 3 pipe, 7-4 is the second heat exchange fluid branch pipe group No. 4 pipe, 7-5 is the second heat exchange fluid branch pipe group No. 5 pipe, 7-6 is the second heat exchange fluid branch pipe group No. 6 pipe; 8-1 is the second heat exchange fluid converging branch pipe group No. 1 pipe, 8-2 is the second heat exchange fluid converging branch pipe group No. 2 pipe, 8-3 is the second heat exchange fluid converging branch pipe group No. 3 pipe, 8-4 is the second heat exchange fluid converging branch pipe group No. 4 pipe, 8-5 is the second heat exchange fluid converging branch pipe group No. 5 pipe, 8-6 is the second heat exchange fluid converging branch pipe group No. 6 pipe. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments, which are intended to explain the present invention rather than to limit it:

[0032] As shown in FIG2 , a compact heat exchanger pipe network system for uniformly distributing flow according to the present invention includes a first heat exchange fluid diversion header 1, a first heat exchange fluid diversion branch pipe group 2, a compact heat exchanger group 3, a first heat exchange fluid converging branch pipe group 4, a first heat exchange fluid converging header 5, a second heat exchange fluid diversion header 6, a second heat exchange fluid diversion branch pipe group 7, a second heat exchange fluid converging branch pipe group 8, and a second heat exchange fluid converging header 9;

[0033] The first heat exchange fluid branch pipe group 2 includes a plurality of first heat exchange fluid branch pipes radially distributed with the first heat exchange fluid branch pipe 1 as the center, and the inlets of all the first heat exchange fluid branch pipes are connected to the outlet of the first heat exchange fluid branch pipe 1; the compact heat exchanger group 3 includes a plurality of compact heat exchangers, and the outlet of each first heat exchange fluid branch pipe is respectively connected to the first side inlet of one compact heat exchanger; the first heat exchange fluid converging branch pipe group 4 includes a plurality of first heat exchange fluid converging branch pipes radially distributed with the first heat exchange fluid converging manifold 5 as the center, and the inlet of each first heat exchange fluid converging branch pipe is respectively connected to the first side outlet of one compact heat exchanger, and the outlets of all the first heat exchange fluid converging branch pipes are connected to the inlet of the first heat exchange fluid converging manifold 5;

[0034] The second heat exchange fluid diversion branch pipe group 7 includes a number of second heat exchange fluid diversion branch pipes radially distributed with the second heat exchange fluid diversion manifold 6 as the center, and the inlets of all second heat exchange fluid diversion branch pipes are connected to the outlet of the second heat exchange fluid diversion manifold 6; the outlet of each second heat exchange fluid diversion branch pipe is respectively connected to the second side inlet of a compact heat exchanger; the second heat exchange fluid converging branch pipe group 8 includes a number of second heat exchange fluid converging branch pipes radially distributed with the second heat exchange fluid converging manifold 9 as the center, the inlet of each second heat exchange fluid converging branch pipe is respectively connected to the second side outlet of a compact heat exchanger, and the outlets of all second heat exchange fluid converging branch pipes are connected to the inlet of the second heat exchange fluid converging manifold 9.

[0035] In a preferred embodiment of the present invention, the several first heat exchange fluid diversion branch pipes in the first heat exchange fluid diversion branch pipe group 2 are of equal length, the several first heat exchange fluid converging branch pipes in the first heat exchange fluid converging branch pipe group 4 are of equal length, the several second heat exchange fluid diversion branch pipes in the second heat exchange fluid diversion branch pipe group 7 are of equal length, and the several second heat exchange fluid converging branch pipes in the second heat exchange fluid converging branch pipe group 8 are of equal length.

[0036] In a preferred embodiment of the present invention, the angle between adjacent first heat exchange fluid diversion branches is 360° / M, where M is the number of first heat exchange fluid diversion branches; the angle between adjacent first heat exchange fluid converging branches is 360° / N, where N is the number of first heat exchange fluid converging branches; the angle between adjacent second heat exchange fluid diversion branches is 360° / O, where O is the number of second heat exchange fluid diversion branches; and the angle between adjacent second heat exchange fluid converging branches is 360° / P, where P is the number of second heat exchange fluid converging branches.

[0037] As a further optimization scheme, several first heat exchange fluid diversion branches in the first heat exchange fluid diversion branch pipe group 2 are symmetrically distributed with the first heat exchange fluid diversion manifold 1 as the center, several first heat exchange fluid confluence branches in the first heat exchange fluid confluence branch pipe group 4 are symmetrically distributed with the first heat exchange fluid confluence manifold 5 as the center, several second heat exchange fluid diversion branches in the second heat exchange fluid diversion branch pipe group 7 are symmetrically distributed with the second heat exchange fluid diversion manifold 6 as the center, and several second heat exchange fluid confluence branches in the second heat exchange fluid confluence branch pipe group 8 are coaxially arranged with the second heat exchange fluid confluence manifold 9 as the center.

[0038] As shown in Figure 5, in a preferred embodiment of the present invention, the compact heat exchanger in the compact heat exchanger group 3 includes a first heat exchange fluid inlet manifold 3-1-1, a first heat exchange fluid outlet manifold 3-1-2, a second heat exchange fluid inlet manifold 3-1-3, a second heat exchange fluid outlet manifold 3-1-4 and a core body 3-1-5; the first heat exchange fluid inlet manifold 3-1-1 is connected to the first heat exchange fluid branch pipe, and the first heat exchange fluid outlet manifold 3-1-2 is connected to the first heat exchange fluid confluence branch pipe; the second heat exchange fluid inlet manifold 3-1-3 is connected to the second heat exchange fluid branch pipe, and the second heat exchange fluid outlet manifold 3-1-4 is connected to the second heat exchange fluid confluence branch pipe; the first heat exchange fluid and the second heat exchange fluid exchange heat in the heat exchange channel in the core body 3-1-5.

[0039] As a further optimization solution, the first heat exchange fluid and the second heat exchange fluid perform countercurrent heat exchange in the core 3-1-5.

[0040] In a preferred embodiment of the present invention, the total mass flow rate of the first heat exchange fluid in the first heat exchange fluid diversion manifold 1 and the first heat exchange fluid converging manifold 5 is equal; the total mass flow rate of the second heat exchange fluid in the second heat exchange fluid diversion manifold 6 and the second heat exchange fluid converging manifold 9 is equal.

[0041] In a preferred embodiment of the present invention, the mass flow rate of each first heat exchange fluid diversion branch pipe in the first heat exchange fluid diversion 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 converging branch pipe in the first heat exchange fluid converging 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 diversion branch pipe in the second heat exchange fluid diversion 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 converging branch pipe in the second heat exchange fluid converging branch pipe group 8 is equal, and the sum is equal to the total mass flow rate of the second heat exchange fluid.

[0042] In a preferred embodiment of the present invention, all compact heat exchangers in the compact heat exchanger group 3 are distributed on the same plane.

[0043] The operating method of the compact heat exchanger pipe network system for uniformly distributing flow comprises:

[0044] The first heat exchange fluid is branched from the first heat exchange fluid branching header 1 and enters each first heat exchange fluid branching pipe in the first heat exchange fluid branching pipe group 2, and then respectively enters each compact heat exchanger in the compact heat exchanger group 3; the second heat exchange fluid is branched from the second heat exchange fluid branching header 6 and enters each second heat exchange fluid branching pipe in the second heat exchange fluid branching pipe group 7, and then respectively enters each compact heat exchanger in the compact heat exchanger group 3;

[0045] The first heat exchange fluid and the second heat exchange fluid complete heat exchange in the compact heat exchanger;

[0046] After the heat exchange is completed, the first heat exchange fluid is collected by each first heat exchange fluid confluence branch pipe in the first heat exchange fluid confluence branch pipe group 4 to the first heat exchange fluid confluence header 5 and flows out of the system; the second heat exchange fluid is collected by each second heat exchange fluid confluence branch pipe in the second heat exchange fluid confluence branch pipe group 8 to the second heat exchange fluid confluence header 9 and flows out of the system.

[0047] The present invention will be further explained below with a specific embodiment:

[0048] In this embodiment, as shown in Figure 3, the first heat exchange fluid diversion branch pipe group 2 includes 6 radially distributed and equal-length first heat exchange fluid diversion branch pipe group No. 1 pipe 2-1, the first heat exchange fluid diversion branch pipe group No. 2 pipe 2-2, the first heat exchange fluid diversion branch pipe group No. 3 pipe 2-3, the first heat exchange fluid diversion branch pipe group No. 4 pipe 2-4, the first heat exchange fluid diversion branch pipe group No. 5 pipe 2-5 and the first heat exchange fluid diversion branch pipe group No. 6 pipe 2-6.

[0049] The first heat exchange fluid confluence branch pipe group 4 includes 6 radially distributed and equal-length first heat exchange fluid confluence branch pipe group No. 1 pipe 4-1, first heat exchange fluid confluence branch pipe group No. 2 pipe 4-2, first heat exchange fluid confluence branch pipe group No. 3 pipe 4-3, first heat exchange fluid confluence branch pipe group No. 4 pipe 4-4, first heat exchange fluid confluence branch pipe group No. 5 pipe 4-5 and first heat exchange fluid confluence branch pipe group No. 6 pipe 4-6.

[0050] 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 are branched out from the outlet of the first heat exchange fluid branch manifold 1. The outlets of the first heat exchange fluid converging manifold group No. 1 pipe 4-1, the first heat exchange fluid converging manifold group No. 2 pipe 4-2, the first heat exchange fluid converging manifold group No. 3 pipe 4-3, the first heat exchange fluid converging manifold group No. 4 pipe 4-4, the first heat exchange fluid converging manifold group No. 5 pipe 4-5, and the first heat exchange fluid converging manifold group No. 6 pipe 4-6 meet at the inlet of the first heat exchange fluid converging manifold 5.

[0051] The compact heat exchanger group 3 includes a first compact heat exchanger 3 - 1 , a second compact heat exchanger 3 - 2 , a third compact heat exchanger 3 - 3 , a fourth compact heat exchanger 3 - 4 , a fifth compact heat exchanger 3 - 5 , and a sixth compact heat exchanger 3 - 6 .

[0052] Pipe No. 1 2-1 of the first heat exchange fluid diversion branch pipe group, pipe No. 2 2-2 of the first heat exchange fluid diversion branch pipe group, pipe No. 3 2-3 of the first heat exchange fluid diversion branch pipe group, pipe No. 4 2-4 of the first heat exchange fluid diversion branch pipe group, pipe No. 5 2-5 of the first heat exchange fluid diversion branch pipe group, pipe No. 6 2-6 of the first heat exchange fluid diversion branch pipe group, compact heat exchanger No. 1 3-1, compact heat exchanger No. 2 3-2, compact heat exchanger No. 3 3, compact heat exchanger No. 4 3-4, compact heat exchanger No. 5 3-5 and compact heat exchanger No. 6 3-6 are symmetrically distributed about the first heat exchange fluid diversion header 1.

[0053] Tube No. 1 4-1 of the first heat exchange fluid confluence branch pipe group, tube No. 2 4-2 of the first heat exchange fluid confluence branch pipe group, tube No. 3 4-3 of the first heat exchange fluid confluence branch pipe group, tube No. 4 4-4 of the first heat exchange fluid confluence branch pipe group, tube No. 5 4-5 of the first heat exchange fluid confluence branch pipe group, tube No. 6 4-6 of the first heat exchange fluid confluence branch pipe group, compact heat exchanger No. 1 3-1, compact heat exchanger No. 2 3-2, compact heat exchanger No. 3 3, compact heat exchanger No. 4 3-4, compact heat exchanger No. 5 3-5 and compact heat exchanger No. 6 3-6 are symmetrically distributed about the first heat exchange fluid confluence header 5.

[0054] As shown in Figure 4, the second heat exchange fluid diversion branch pipe group 7 includes the second heat exchange fluid diversion branch pipe group No. 1 pipe 7-1, the second heat exchange fluid diversion branch pipe group No. 2 pipe 7-2, the second heat exchange fluid diversion branch pipe group No. 3 pipe 7-3, the second heat exchange fluid diversion branch pipe group No. 4 pipe 7-4, the second heat exchange fluid diversion branch pipe group No. 5 pipe 7-5 and the second heat exchange fluid diversion branch pipe group No. 6 pipe 7-6.

[0055] The second heat exchange fluid convergence branch pipe group 8 includes the second heat exchange fluid convergence branch pipe group No. 1 pipe 8-1, the second heat exchange fluid convergence branch pipe group No. 2 pipe 8-2, the second heat exchange fluid convergence branch pipe group No. 3 pipe 8-3, the second heat exchange fluid convergence branch pipe group No. 4 pipe 8-4, the second heat exchange fluid convergence branch pipe group No. 5 pipe 8-5 and the second heat exchange fluid convergence branch pipe group No. 6 pipe 8-6.

[0056] The second heat exchange fluid branch pipe group No. 1 pipe 7-1, the second heat exchange fluid branch pipe group No. 2 pipe 7-2, the second heat exchange fluid branch pipe group No. 3 pipe 7-3, the second heat exchange fluid branch pipe group No. 4 pipe 7-4, the second heat exchange fluid branch pipe group No. 5 pipe 7-5, and the second heat exchange fluid branch pipe group No. 6 pipe 7-6 are branched out from the outlet of the second heat exchange fluid branch manifold 6. The outlets of the second heat exchange fluid converging manifold group No. 1 pipe 8-1, the second heat exchange fluid converging manifold group No. 2 pipe 8-2, the second heat exchange fluid converging manifold group No. 3 pipe 8-3, the second heat exchange fluid converging manifold group No. 4 pipe 8-4, the second heat exchange fluid converging manifold group No. 5 pipe 8-5, and the second heat exchange fluid converging manifold group No. 6 pipe 8-6 meet at the inlet of the second heat exchange fluid converging manifold 9.

[0057] The second heat exchange fluid diversion branch pipe group No. 1 pipe 7-1, the second heat exchange fluid diversion branch pipe group No. 2 pipe 7-2, the second heat exchange fluid diversion branch pipe group No. 3 pipe 7-3, the second heat exchange fluid diversion branch pipe group No. 4 pipe 7-4, the second heat exchange fluid diversion branch pipe group No. 5 pipe 7-5, the second heat exchange fluid diversion branch pipe group No. 6 pipe 7-6, compact heat exchanger No. 1 3-1, compact heat exchanger No. 2 3-2, compact heat exchanger No. 3 3, compact heat exchanger No. 4 3-4, compact heat exchanger No. 5 3-5 and compact heat exchanger No. 6 3-6 are symmetrically distributed about the second heat exchange fluid diversion header 6.

[0058] The second heat exchange fluid confluence branch pipe group No. 1 pipe 8-1, the second heat exchange fluid confluence branch pipe group No. 2 pipe 8-2, the second heat exchange fluid confluence branch pipe group No. 3 pipe 8-3, the second heat exchange fluid confluence branch pipe group No. 4 pipe 8-4, the second heat exchange fluid confluence branch pipe group No. 5 pipe 8-5, the second heat exchange fluid confluence branch pipe group No. 6 pipe 8-6, compact heat exchanger No. 1 3-1, compact heat exchanger No. 2 3-2, compact heat exchanger No. 3 3, compact heat exchanger No. 4 3-4, compact heat exchanger No. 5 3-5 and compact heat exchanger No. 6 3-6 are symmetrically distributed about the second heat exchange fluid confluence header 9.

[0059] The angle between adjacent first heat exchange fluid diversion branches is 60°, the angle between adjacent first heat exchange fluid converging branches is 60°, the angle between adjacent second heat exchange fluid diversion branches is 60°, and the angle between adjacent second heat exchange fluid converging branches is 60°.

[0060] As shown in Figure 5, compact heat exchanger No. 1 3-1 is used as an example. It 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 connection structure of the remaining compact heat exchangers is the same.

[0061] As shown in Figures 2, 3, and 4, the first and second heat exchange fluids involved in heat exchange are each evenly divided into six branches in the compact heat exchanger pipe network with uniform flow distribution shown in the present invention. The connection sequence is illustrated using one of the first and second heat exchange fluid branches as an example, as shown in Figure 5. The outlet of pipe No. 1, pipe 2-1, of the first heat exchange fluid branch pipe group 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 inlet of pipe No. 1, pipe 4-1, of the first heat exchange fluid converging pipe group. The outlet of pipe No. 1, pipe 4-1, of the first heat exchange fluid converging pipe group converges with the inlet of the first heat exchange fluid converging header 5. The outlet of pipe No. 1, pipe 7-1, of the second heat exchange fluid branch pipe group 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 inlet of pipe No. 1, pipe 8-1, of the second heat exchange fluid converging pipe group. The outlet of pipe No. 1, pipe 8-1, of the second heat exchange fluid converging pipe group converges with the inlet of the second heat exchange fluid converging header 9.

[0062] The flow heat transfer process is as follows:

[0063] The first heat exchange fluid flows sequentially through pipe 2-1 of the first heat exchange fluid branch pipe group, the first heat exchange fluid inlet header 3-1-1, and the heat exchange channels of the core 3-1-5. The second heat exchange fluid flows sequentially through pipe 7-1 of the second heat exchange fluid branch pipe group, the second heat exchange fluid inlet header 3-1-3, and the heat exchange channels of the core 3-1-5. The first and second heat exchange fluids undergo countercurrent heat exchange between the heat exchange channels of the core 3-1-5. After completing the heat exchange, the first heat exchange fluid flows sequentially through the first heat exchange fluid outlet header 3-1-2 and pipe 4-1 of the first heat exchange fluid converging pipe group, and then converges with the other five first heat exchange fluids at the first heat exchange fluid converging header 5. The second heat exchange fluid flows sequentially through the second heat exchange fluid outlet header 3-1-4 and pipe 8-1 of the second heat exchange fluid converging pipe group, and then converges with the other five second heat exchange fluids at the second heat exchange fluid converging header 9.

[0064] During the flow and heat exchange process of the above six first heat exchange fluids and second heat exchange fluids, the mass flow rate of each fluid is 1 / 6 of the total mass flow rate, and the heat exchange amount is 1 / 6 of the total heat exchange amount.

[0065] It should be noted that the above embodiment provides a heat exchanger network consisting of 6 compact heat exchangers and a pipe network, and the same method can also be applied to heat exchanger networks consisting of other numbers of compact heat exchangers and pipe networks.

[0066] The above description is merely an embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention, or equivalent structures or equivalent process transformations made using the contents of the present invention's description and drawings, or direct or indirect applications in other related technical fields, should all be covered by the scope of protection of the present invention.

Claims

1. A compact heat exchanger pipe network system for evenly distributing flow rate, characterized in that It includes 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 collecting branch pipe group (4), a first heat exchange fluid collecting 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 collecting branch pipe group (8), and a second heat exchange fluid collecting header (9); The first heat exchange fluid distribution branch pipe group (2) includes a number of first heat exchange fluid distribution branch pipes radially distributed with the first heat exchange fluid distribution header (1) as the center, and the inlets of all the first heat exchange fluid distribution branch pipes are connected to the outlet of the first heat exchange fluid distribution header (1); the compact heat exchanger group (3) includes a number of compact heat exchangers, and the outlet of each first heat exchange fluid distribution branch pipe is respectively connected to the first side inlet of a compact heat exchanger; the first heat exchange fluid collecting branch pipe group (4) includes a number of first heat exchange fluid collecting branch pipes radially distributed with the first heat exchange fluid collecting header (5) as the center, the inlet of each first heat exchange fluid collecting branch pipe is respectively connected to the first side outlet of a compact heat exchanger, and the outlets of all the first heat exchange fluid collecting branch pipes are connected to the inlet of the first heat exchange fluid collecting header (5); The second heat exchange fluid distribution branch pipe group (7) includes a number of second heat exchange fluid distribution branch pipes radially distributed with the second heat exchange fluid distribution header (6) as the center, and the inlets of all the second heat exchange fluid distribution branch pipes are connected to the outlet of the second heat exchange fluid distribution header (6); the outlet of each second heat exchange fluid distribution branch pipe is respectively connected to the second side inlet of a compact heat exchanger; the second heat exchange fluid collecting branch pipe group (8) includes a number of second heat exchange fluid collecting branch pipes radially distributed with the second heat exchange fluid collecting header (9) as the center, the inlet of each second heat exchange fluid collecting branch pipe is respectively connected to the second side outlet of a compact heat exchanger, and the outlets of all the second heat exchange fluid collecting branch pipes are connected to the inlet of the second heat exchange fluid collecting header (9).

2. The compact heat exchanger pipe network system for evenly distributing flow rate according to claim 1, wherein The number of first heat exchange fluid distribution branch pipes in the first heat exchange fluid distribution branch pipe group (2) are of equal length, the number of first heat exchange fluid collecting branch pipes in the first heat exchange fluid collecting branch pipe group (4) are of equal length, the number of second heat exchange fluid distribution branch pipes in the second heat exchange fluid distribution branch pipe group (7) are of equal length, and the number of second heat exchange fluid collecting branch pipes in the second heat exchange fluid collecting branch pipe group (8) are of equal length.

3. The compact heat exchanger pipe network system for evenly distributing flow rate according to claim 1, characterized in that, The angle between adjacent first heat exchange fluid distribution branch pipes is 360° / M, where M is the number of first heat exchange fluid distribution branch pipes; the angle between adjacent first heat exchange fluid collecting branch pipes is 360° / N, where N is the number of first heat exchange fluid collecting branch pipes; the angle between adjacent second heat exchange fluid distribution branch pipes is 360° / O, where O is the number of second heat exchange fluid distribution branch pipes; the angle between adjacent second heat exchange fluid collecting branch pipes is 360° / P, where P is the number of second heat exchange fluid collecting branch pipes.

4. The compact heat exchanger pipe network system for evenly distributing flow rate according to claim 3, characterized in that, A number of first heat exchange fluid shunt branch pipes in the first heat exchange fluid shunt branch pipe group (2) are symmetrically distributed with the first heat exchange fluid shunt header (1) as the center. A number of first heat exchange fluid confluence branch pipes in the first heat exchange fluid confluence branch pipe group (4) are symmetrically distributed with the first heat exchange fluid confluence header (5) as the center. A number of second heat exchange fluid shunt branch pipes in the second heat exchange fluid shunt branch pipe group (7) are symmetrically distributed with the second heat exchange fluid shunt header (6) as the center. A number of second heat exchange fluid confluence branch pipes in the second heat exchange fluid confluence branch pipe group (8) are symmetrically distributed with the second heat exchange fluid confluence header (9) coaxially arranged as the center.

5. The compact heat exchanger pipe network system for evenly distributing flow rate according to claim 1, characterized in that, The compact heat exchangers in the compact heat exchanger group (3) include 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 shunt branch pipes, and the first heat exchange fluid outlet header (3-1-2) is connected to the first heat exchange fluid confluence branch pipes; the second heat exchange fluid inlet header (3-1-3) is connected to the second heat exchange fluid shunt branch pipes, and the second heat exchange fluid outlet header (3-1-4) is connected to the second heat exchange fluid confluence branch pipes; the first heat exchange fluid and the second heat exchange fluid exchange heat in the heat exchange channels in the core (3-1-5).

6. The compact heat exchanger pipe network system for evenly distributing flow rate according to claim 5, characterized in that, The first heat exchange fluid and the second heat exchange fluid exchange heat countercurrently in the core (3-1-5).

7. The compact heat exchanger pipe network system for evenly distributing flow rate according to claim 1, characterized in that, The total mass flow rate of the first heat exchange fluid in the first heat exchange fluid shunt header (1) is equal to that in the first heat exchange fluid confluence header (5); the total mass flow rate of the second heat exchange fluid in the second heat exchange fluid shunt header (6) is equal to that in the second heat exchange fluid confluence header (9).

8. The compact heat exchanger pipe network system for evenly distributing flow rate according to claim 1, characterized in that The mass flow rate of each first heat exchange fluid shunt branch pipe in the first heat exchange fluid shunt 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 confluence branch pipe in the first heat exchange fluid confluence 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 shunt branch pipe in the second heat exchange fluid shunt 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 confluence branch pipe in the second heat exchange fluid confluence branch pipe group (8) is equal, and the sum is equal to the total mass flow rate of the second heat exchange fluid.

9. The compact heat exchanger pipe network system for evenly distributing flow rate according to claim 1, characterized in that, All the compact heat exchangers in the compact heat exchanger group (3) are distributed on the same plane.

10. The working method of the compact heat exchanger pipe network system with uniform flow distribution according to claims 1 to 9, characterized in that, Including: The first heat exchange fluid is shunted from the first heat exchange fluid shunt header (1) into each first heat exchange fluid shunt branch pipe in the first heat exchange fluid shunt branch pipe group (2), and then enters each compact heat exchanger in the compact heat exchanger group (3) respectively; the second heat exchange fluid is shunted from the second heat exchange fluid shunt header (6) into each second heat exchange fluid shunt branch pipe in the second heat exchange fluid shunt branch pipe group (7), and then enters each compact heat exchanger in the compact heat exchanger group (3) respectively; The first heat exchange fluid and the second heat exchange fluid complete heat exchange in the compact heat exchanger; After the heat exchange is completed, the first heat exchange fluid is collected by each first heat exchange fluid collecting branch pipe in the first heat exchange fluid collecting branch pipe group (4) and converges into the first heat exchange fluid collecting header (5) and then flows out of the system; the second heat exchange fluid is collected by each second heat exchange fluid collecting branch pipe in the second heat exchange fluid collecting branch pipe group (8) and converges into the second heat exchange fluid collecting header (9) and then flows out of the system.

Images