Description method and device for array heat exchanger of compressed air energy storage system

Abstract

The invention relates to the technical field of heat exchangers, in particular to a description method and device for an array heat exchanger of a compressed air energy storage system.The method comprises the steps that based on a preset countercurrent heat exchanger model of the compressed air energy storage system, an array heat exchanger topological structure of the compressed air energy storage system is established; determining a mathematical description matrix corresponding to the topological structure of the array heat exchanger through the topological structure of the array heat exchanger; whether the topological structure of the array heat exchanger is transformed or not is judged, if the topological structure of the array heat exchanger is transformed, a corresponding correction strategy is determined according to the transformed topological structure of the array heat exchanger, the mathematical description matrix is corrected through the correction strategy, and if not, the topological structure of the array heat exchanger is described through the mathematical description matrix. Therefore, the problems that in an existing adiabatic pressure storage system, the number of array type heat exchanger nodes and units is large, and modeling is difficult are solved.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a method and device for describing an array heat exchanger of a compressed air energy storage system. Background Art

[0002] At present, some advanced adiabatic compressed air energy storage systems have attracted widespread attention by eliminating the disadvantage of traditional compressed air energy storage systems that require the combustion chamber to heat the air delivered to the turbine on the power generation side.

[0003] As an important part of advanced adiabatic pressure storage system, research on heat exchangers is also ongoing. Most existing compressed air energy storage systems use counter-flow heat exchangers (CHE), which have the advantages of being suitable for large mass flow rates, high pressure environments, and high heat exchange efficiency.

[0004] However, the heat exchangers of compressed air energy storage systems are mostly large-capacity single heat exchangers, which cannot flexibly adjust their own parameters according to operating requirements to adapt to different operating conditions. It is difficult to overcome the operating difficulties such as wide operating conditions and variable operating conditions in compressed air energy storage power stations at this stage, which needs to be solved urgently. Summary of the invention

[0005] The present application provides a method and device for describing an array heat exchanger of a compressed air energy storage system, so as to solve the problems of a large number of nodes and units of the array heat exchanger in the existing adiabatic compressed air storage system and difficulty in modeling.

[0006] The first aspect of the present application provides a method for describing an array heat exchanger of a compressed air energy storage system, comprising the following steps: based on a preset countercurrent heat exchanger model of the compressed air energy storage system, establishing an array heat exchanger topology structure of the compressed air energy storage system; determining a mathematical description matrix corresponding to the array heat exchanger topology structure through the array heat exchanger topology structure; and judging whether the array heat exchanger topology structure has changed, wherein if the array heat exchanger topology structure has changed, determining a corresponding correction strategy according to the changed array heat exchanger topology structure, so as to correct the mathematical description matrix using the correction strategy; otherwise, describing the array heat exchanger topology structure through the mathematical description matrix.

[0007] Optionally, in one embodiment of the present application, determining the mathematical description matrix corresponding to the array heat exchanger topology structure through the array heat exchanger topology structure includes: based on the array heat exchanger topology structure, determining the node-thermal resistance branch association matrix corresponding to the thermal resistance branch in the array heat exchanger topology structure and the node-equivalent branch first association matrix corresponding to the equivalent temperature source branch; calculating the mathematical description matrix according to the node-thermal resistance branch association matrix and the node-equivalent branch first association matrix.

[0008] Optionally, in one embodiment of the present application, if the array heat exchanger topology changes, a corresponding correction strategy is determined according to the transformed array heat exchanger topology to use the correction strategy to correct the mathematical description matrix, including: when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a state of full series connection of cold and hot fluids, and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, a node-equivalent branch second association matrix and a first equivalent branch admittance matrix are generated, and the mathematical description matrix is ​​corrected according to the node-equivalent branch second association matrix and the first equivalent branch admittance matrix to obtain a first mathematical description correction matrix; when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a state of full series connection of cold and hot fluids, and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, When the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a hot fluid series state, and the hot fluid flows from the second heat exchanger unit to the first heat exchanger unit, a node-equivalent branch fourth association matrix and a third equivalent branch admittance matrix are generated, and the mathematical description matrix is ​​corrected according to the node-equivalent branch third association matrix and the second equivalent branch admittance matrix to obtain a third mathematical description correction matrix; based on the first mathematical description correction matrix or the second mathematical description correction matrix or the third mathematical description correction matrix, the array heat exchanger of the compressed air energy storage system is described.

[0009] Optionally, in one embodiment of the present application, the mathematical expression of the mathematical description matrix is:

[0010]

[0011] Wherein, y is the thermal resistance branch admittance matrix; A represents the node-thermal resistance branch association matrix; T represents the node temperature column vector; represents the branch heat flow column vector, R N Represents the thermal resistance of the heat exchanger.

[0012] A second aspect of the present application provides a description device for an array heat exchanger of a compressed air energy storage system, comprising: a topology construction module, used to establish the array heat exchanger topology structure of the compressed air energy storage system based on a preset countercurrent heat exchanger model of the compressed air energy storage system; a matrix construction module, used to determine the mathematical description matrix corresponding to the array heat exchanger topology structure through the array heat exchanger topology structure; a correction module, used to determine whether the array heat exchanger topology structure changes, wherein if the array heat exchanger topology structure changes, a corresponding correction strategy is determined according to the transformed array heat exchanger topology structure, so as to use the correction strategy to correct the mathematical description matrix, otherwise the array heat exchanger topology structure is described by the mathematical description matrix.

[0013] Optionally, in one embodiment of the present application, the matrix construction module includes: a determination unit, used to determine, based on the array heat exchanger topology structure, a node-thermal resistance branch association matrix corresponding to the thermal resistance branch in the array heat exchanger topology structure and a node-equivalent branch first association matrix corresponding to the equivalent temperature source branch; a calculation unit, used to calculate the mathematical description matrix based on the node-thermal resistance branch association matrix and the node-equivalent branch first association matrix.

[0014] Optionally, in one embodiment of the present application, the correction module includes: a first transformation unit, which is used to generate a node-equivalent branch second association matrix and a first equivalent branch admittance matrix when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a cold and hot fluid full series state, and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, and correct the mathematical description matrix according to the node-equivalent branch second association matrix and the first equivalent branch admittance matrix to obtain a first mathematical description correction matrix; a second transformation unit, which is used to generate a node-equivalent branch third association matrix and a second equivalent branch admittance matrix when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a cold fluid series state, and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit. The invention relates to a first transformation unit, a first transformation unit, a second transformation unit, a second transformation unit, a third transformation unit, a fourth transformation unit, a fourth node-equivalent branch association matrix, a third equivalent branch admittance matrix, and a correction of the mathematical description matrix according to the node-equivalent branch third association matrix and the second equivalent branch admittance matrix to obtain a second mathematical description correction matrix; a third transformation unit, when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a hot fluid series state, and the hot fluid flows from the second heat exchanger unit to the first heat exchanger unit, generates a node-equivalent branch fourth association matrix and a third equivalent branch admittance matrix, and corrects the mathematical description matrix according to the node-equivalent branch fourth association matrix and the third equivalent branch admittance matrix to obtain a third mathematical description correction matrix; a description unit, for describing the array heat exchanger of the compressed air energy storage system based on the first mathematical description correction matrix or the second mathematical description correction matrix or the third mathematical description correction matrix.

[0015] Optionally, in one embodiment of the present application, the mathematical expression of the mathematical description matrix is:

[0016]

[0017] Wherein, y is the thermal resistance branch admittance matrix; A represents the node-thermal resistance branch association matrix; T represents the node temperature column vector; represents the branch heat flow column vector, R N Represents the thermal resistance of the heat exchanger.

[0018] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the description method of the array heat exchanger of the compressed air energy storage system as described in the above embodiment.

[0019] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, which, when executed by a processor, implements the above-described method for the array heat exchanger of a compressed air energy storage system.

[0020] Therefore, the embodiments of the present application have the following beneficial effects:

[0021] The embodiments of the present application can establish the array heat exchanger topology structure of the compressed air energy storage system based on a preset countercurrent heat exchanger model of the compressed air energy storage system; determine the mathematical description matrix corresponding to the array heat exchanger topology structure through the array heat exchanger topology structure; determine whether the array heat exchanger topology structure has changed, wherein, if the array heat exchanger topology structure has changed, then determine the corresponding correction strategy according to the transformed array heat exchanger topology structure, so as to correct the mathematical description matrix using the correction strategy, otherwise the array heat exchanger topology structure is described by the mathematical description matrix. The present application helps to improve the overall performance of the compressed air energy storage heat storage and heat exchange system through precise modeling of physical properties and structural characteristics, combined with the abstract processing of electrical network theory and the flexible application of matrix operations, and can effectively improve the utilization rate of clean energy and promote energy transformation. As a result, the problems of large number of array heat exchanger nodes and units and difficult modeling in existing adiabatic pressure storage systems are solved.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 A flowchart of a method for describing an array heat exchanger of a compressed air energy storage system provided according to an embodiment of the present application;

[0025] Figure 2 An exemplary diagram of a device for describing an array heat exchanger of a compressed air energy storage system according to an embodiment of the present application;

[0026] Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0027] Among them, 10-compressed air energy storage system array heat exchanger description device, 100-topology building module, 200-matrix building module, 300-correction module, 301-memory, 302-processor, 303-communication interface. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] The following describes the description method and device of the array heat exchanger of the compressed air energy storage system of the embodiment of the present application with reference to the accompanying drawings. In response to the problems mentioned in the above background technology, the present application provides a description method of the array heat exchanger of the compressed air energy storage system, in which the array heat exchanger topology structure of the compressed air energy storage system is established based on the preset countercurrent heat exchanger model of the compressed air energy storage system; the mathematical description matrix corresponding to the array heat exchanger topology structure is determined by the array heat exchanger topology structure; it is judged whether the array heat exchanger topology structure changes, wherein, if the array heat exchanger topology structure changes, the corresponding correction strategy is determined according to the transformed array heat exchanger topology structure, so as to correct the mathematical description matrix using the correction strategy, otherwise the array heat exchanger topology structure is described by the mathematical description matrix. The present application helps to improve the overall performance of the compressed air energy storage heat storage and heat exchange system through precise modeling of physical properties and structural characteristics, combined with the abstract processing of electrical network theory, and the flexible application of matrix operations, which can effectively improve the utilization rate of clean energy and promote energy transformation. This solves the problems of large number of array heat exchanger nodes and units and difficult modeling in existing adiabatic pressure storage systems.

[0030] Specifically, Figure 1 A flowchart of a method for describing an array heat exchanger for a compressed air energy storage system provided in an embodiment of the present application.

[0031] like Figure 1 As shown, the description method of the compressed air energy storage system array heat exchanger includes the following steps:

[0032] In step S101, based on a preset counterflow heat exchanger model of the compressed air energy storage system, an array heat exchanger topology structure of the compressed air energy storage system is established.

[0033] The embodiments of the present application can first establish a countercurrent heat exchanger model of a compressed air energy storage system, and based on the countercurrent heat exchanger model and related electrical network theories, establish an array heat exchanger topology structure, thereby using electrical network theory to formulate the heat exchanger topology network relationship and improve the efficiency of calculating related thermal physical quantities.

[0034] Specifically, those skilled in the art should understand that Ohm's law in heat transfer can be expressed as:

[0035]

[0036] Where T is the temperature, is the heat flow (i.e., the branch heat flow column vector), R is the thermal resistance of the heat exchanger, i and j are serial numbers; and the thermal resistance R can be calculated by the following formula

[0037]

[0038] Among them, the subscripts c and h represent cold and hot fluids, i represents the inlet; G c , G h is the heat capacity flow rate of the hot and cold fluids, which can be defined as the product of the fluid mass flow rate and the constant pressure specific heat capacity, that is, a c 、a h is the equivalent coefficient of cold and hot fluids; h is the total heat transfer coefficient; A is the heat exchange area.

[0039] At the same time, based on the law of conservation of energy, the expressions for the inlet and outlet temperatures of the cold and hot fluids can be obtained as follows:

[0040]

[0041] Among them, the subscript o represents the outlet; From the above formula, it can be seen that the heat exchanger unit can be divided into the thermal resistance R and the equivalent temperature element The connection representation of .

[0042] When performing topological modeling of the heat exchange network, the embodiments of the present application need to consider the distribution and integration of the air mass flow rate. If a series and parallel combination is performed at a non-total inlet and outlet, the calculation of the air mass flow rate of each heat exchanger unit will become very complicated, which may cause the overall air mass flow rate of the system to decrease.

[0043] This physical property determines that there will be some limitations in the formation process of CHEN. Generally speaking, parallel connection is only allowed at the total inlet and total outlet of the heat exchanger. Therefore, the overall structure of CHEN should be composed of several different numbers of heat exchanger units connected in series and then connected in parallel.

[0044] In the embodiments of the present application, the connection methods of the cold and hot fluids in the heat exchanger need to be considered separately. In a compressed air energy storage power station, after the heat exchange of the heat transfer oil in the heat exchanger is completed, most of it is transported to the low-temperature oil storage reservoir to prepare for heat exchange with the hot air transported to the gas storage reservoir by the compressor during the compression process. Therefore, if only the air side is connected in series and the heat transfer oil is connected in parallel, that is, the heat transfer oil inlet temperature of each heat exchanger unit is the initial temperature of the heat transfer oil.

[0045] In the actual implementation process, the embodiments of the present application can make corresponding assumptions for the above requirements: the hot and cold fluids of each heat exchange unit are connected in different ways, but they all follow the rule of parallel connection only at the total inlet and outlet. Therefore, according to this assumption, the heat exchangers in the embodiments of the present application mainly include two connection methods: full series connection of hot and cold fluids and single series connection of fluids, thereby determining the array heat exchanger topology structure, which can take into account the physical feasibility and performance improvement capabilities of the heat exchanger topology network.

[0046] Therefore, the embodiment of the present application constructs an accurate countercurrent heat exchanger model through the physical characteristics of the countercurrent heat exchanger to capture the heat exchange efficiency of the compressed air energy storage system; in addition, the embodiment of the present application abstracts the heat exchanger topology network into an electrical network by drawing on the electrical network theory, which greatly simplifies the modeling complexity caused by the large number of heat exchanger nodes and units, so as to analyze and optimize and improve the efficiency of performance analysis and optimization of the heat exchanger topology network.

[0047] In step S102, a mathematical description matrix corresponding to the array heat exchanger topology structure is determined through the array heat exchanger topology structure.

[0048] After establishing the array heat exchanger topology structure, the embodiments of the present application may further determine the corresponding mathematical description matrix through the array heat exchanger topology structure.

[0049] Optionally, in one embodiment of the present application, a mathematical description matrix corresponding to the array heat exchanger topology structure is determined through the array heat exchanger topology structure, including: based on the array heat exchanger topology structure, determining a node-thermal resistance branch association matrix corresponding to the thermal resistance branch in the array heat exchanger topology structure and a node-equivalent branch first association matrix corresponding to the equivalent temperature source branch; and calculating the mathematical description matrix according to the node-thermal resistance branch association matrix and the node-equivalent branch first association matrix.

[0050] It should be noted that the embodiment of the present application can introduce a node-thermal resistance branch association matrix A and a node-equivalent branch association matrix M (i.e., a node-equivalent branch first association matrix) to describe a heat exchange network (i.e., an array heat exchanger topology structure). The matrices A and M are similar in meaning to the node-branch association matrix in the power concept; A can be used to describe a thermal resistance branch. When a ij When it is 0, it means that the two end nodes of branch j do not contain node i. ij When it is 1, it means that the outflow node of branch j is node i, a ij -1 means that the inflow node of branch j is node i; M can be used to describe the equivalent temperature source branch. ij When it is 0, it means that the two end nodes of branch j do not include node i. ij When it is -1, it means that the outflow node of branch j is node i.ij When it is 1, it means that the inflow node of branch j is node i.

[0051] According to the aforementioned neglected content, no elements related to the hot and cold fluid outlet nodes will appear in M. For a CHEN with N heat exchanger units, the embodiment of the present application may assume that all heat exchanger units are connected in parallel as the base state, and the G of each heat exchanger network c , G h equal.

[0052] Therefore, the embodiments of the present application can obtain the mathematical description matrix of the current array heat exchanger topology structure (i.e., the heat exchange network equation at this time) according to the node-thermal resistance branch association matrix and the node-equivalent branch first association matrix, thereby providing guidance and basis for the correction of the mathematical description matrix when the subsequent array heat exchanger topology structure is transformed.

[0053] Optionally, in one embodiment of the present application, the mathematical expression of the mathematical description matrix is:

[0054]

[0055] Where y is the thermal resistance branch admittance matrix; A represents the node-thermal resistance branch association matrix; T represents the node temperature column vector; represents the branch heat flow column vector, R N Represents the thermal resistance of the heat exchanger.

[0056] In the embodiment of the present application, it is assumed that all heat exchanger units are connected in parallel as the base state, and the G of each heat exchanger network is c , G h When they are equal, the mathematical description matrix of the current array heat exchanger topology can be obtained, as shown in the following formula:

[0057]

[0058] Where y is the thermal resistance branch admittance matrix; A represents the node-thermal resistance branch association matrix; T represents the node temperature column vector; Represents the branch heat flow column vector; R N Represents the thermal resistance of the heat exchanger.

[0059] At this point, the inlet temperatures of all hot and cold fluids are known, so they can be easily obtained using the above formula: Substituting this into the temperature equations related to the hot and cold fluid outlet nodes, the outlet temperatures of all heat exchangers can be obtained.

[0060] In step S103, it is determined whether the array heat exchanger topology structure has changed. If the array heat exchanger topology structure has changed, a corresponding correction strategy is determined according to the changed array heat exchanger topology structure, so as to correct the mathematical description matrix using the correction strategy. Otherwise, the array heat exchanger topology structure is described by the mathematical description matrix.

[0061] Furthermore, the embodiments of the present application can also analyze the topological structure of the array heat exchanger to determine whether its structure has changed; if its structure has not changed, the topological structure of the array heat exchanger can be described by the above-mentioned mathematical description matrix; if its structure has not changed, a corresponding correction strategy can be formulated according to the transformed topological structure of the array heat exchanger, so as to quickly correct the above-mentioned mathematical description matrix through the corresponding correction strategy, obtain the corresponding mathematical description correction matrix, and quickly and accurately describe the transformed topological structure of the array heat exchanger through the mathematical description correction matrix, thereby effectively improving the flexibility of the topological structure of the array heat exchanger while effectively ensuring the accuracy and adaptability of the topological structure of the array heat exchanger under different working conditions.

[0062] Optionally, in one embodiment of the present application, if the array heat exchanger topology changes, a corresponding correction strategy is determined according to the transformed array heat exchanger topology to use the correction strategy to correct the mathematical description matrix, including: when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a state of full series connection of cold and hot fluids, and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, a node-equivalent branch second association matrix and a first equivalent branch admittance matrix are generated, and the mathematical description matrix is ​​corrected according to the node-equivalent branch second association matrix and the first equivalent branch admittance matrix to obtain a first mathematical description correction matrix; when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a state of full series connection of cold and hot fluids, and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit When the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a hot fluid series state, and the hot fluid flows from the second heat exchanger unit to the first heat exchanger unit, a node-equivalent branch fourth association matrix and a third equivalent branch admittance matrix are generated, and the mathematical description matrix is ​​corrected according to the node-equivalent branch third association matrix and the second equivalent branch admittance matrix to obtain a third mathematical description correction matrix; based on the first mathematical description correction matrix or the second mathematical description correction matrix or the third mathematical description correction matrix, the array heat exchanger of the compressed air energy storage system is described.

[0063] In the actual implementation process, when the topological structure of the array heat exchanger changes, the embodiment of the present application can correct the above mathematical description matrix according to the following two correction strategies and obtain the outlet temperatures of the cold and hot fluids, as described below:

[0064] 1. When the hot and cold fluids between heat exchanger unit l (i.e., the first heat exchanger unit) and heat exchanger unit n (i.e., the second heat exchanger unit) are fully connected in series, and the cold fluid flows from heat exchanger unit l to heat exchanger unit n, the embodiment of the present application needs to generate a node-equivalent branch association matrix (i.e., a node-equivalent branch second association matrix) M and an equivalent branch admittance matrix (i.e., a first equivalent branch admittance matrix) y eq , as shown below:

[0065]

[0066] y eq =diag[G h ,G c ](10)

[0067] Therefore, the embodiment of the present application can supplement and correct the heat exchange network equation (i.e., the above-mentioned mathematical description matrix) according to the node-equivalent branch second association matrix and the first equivalent branch admittance matrix, and obtain the first mathematical description correction matrix as shown below:

[0068]

[0069] in, And will Involved in The equation with Subtract to eliminate The other equations can still be easily obtained based on the fluid inlet and outlet temperatures.

[0070] 2. When the cold fluid is connected in series between heat exchanger unit l and heat exchanger unit n, and the cold fluid flows from heat exchanger unit l to heat exchanger unit n, similar node-equivalent branch association matrix (i.e., node-equivalent branch third association matrix) M and equivalent branch admittance matrix (i.e., second equivalent branch admittance matrix) y can be obtained. eq , as shown below:

[0071]

[0072] Therefore, the embodiment of the present application can supplement and correct the heat exchange network equation (i.e., the above-mentioned mathematical description matrix) according to the node-equivalent branch third association matrix and the second equivalent branch admittance matrix, and obtain the second mathematical description correction matrix as shown below:

[0073]

[0074] in, And will The The equation with Subtract to eliminate The other equations can still be easily obtained based on the fluid inlet and outlet temperatures.

[0075] 3. When the heat exchanger unit l and the heat exchanger unit n are connected in series with the heat fluid, and the heat fluid flows from the heat exchanger unit n to the heat exchanger l, the node-equivalent branch association matrix (i.e., the fourth node-equivalent branch association matrix) M and the equivalent branch admittance matrix (i.e., the third equivalent branch admittance matrix) y eq , as shown below:

[0076]

[0077] Therefore, the embodiment of the present application can supplement and correct the heat exchange network equation (i.e., the above-mentioned mathematical description matrix) according to the fourth node-equivalent branch association matrix and the third equivalent branch admittance matrix, and obtain the third mathematical description correction matrix as shown below:

[0078]

[0079] in, The calculation method of the outlet temperature is the same as the above calculation strategy, which will not be repeated here; and when the topology needs to be changed, the embodiment of the present application can delete y eq The corresponding elements in and the corresponding columns in M ​​are connected, and new elements and columns are added according to the connection method.

[0080] Furthermore, the embodiments of the present application can describe the array heat exchanger of the compressed air energy storage system based on the first mathematical description correction matrix, the second mathematical description correction matrix, or the third mathematical description correction matrix.

[0081] Therefore, the embodiments of the present application provide an efficient and reliable modeling method for the array heat exchanger topology network in the compressed air energy storage system through precise modeling of physical properties and structural characteristics, combined with the abstract processing of electrical network theory and the flexible application of matrix operations, which helps to improve the overall performance of the compressed air energy storage and heat exchange system, and can effectively improve the utilization rate of clean energy and promote energy transformation.

[0082] According to the description method of the array heat exchanger of the compressed air energy storage system proposed in the embodiment of the present application, the array heat exchanger topology structure of the compressed air energy storage system is established based on the preset countercurrent heat exchanger model of the compressed air energy storage system; the mathematical description matrix corresponding to the array heat exchanger topology structure is determined through the array heat exchanger topology structure; and it is judged whether the array heat exchanger topology structure has changed, wherein, if the array heat exchanger topology structure has changed, a corresponding correction strategy is determined according to the transformed array heat exchanger topology structure, so as to correct the mathematical description matrix using the correction strategy, otherwise the array heat exchanger topology structure is described by the mathematical description matrix. This application helps to improve the overall performance of the compressed air energy storage heat storage and heat exchange system through precise modeling of physical properties and structural characteristics, combined with the abstract processing of electrical network theory and the flexible application of matrix operations, and can effectively improve the utilization rate of clean energy and promote energy transformation.

[0083] Secondly, the description device of the array heat exchanger of the compressed air energy storage system proposed in the embodiment of the present application is described with reference to the accompanying drawings.

[0084] Figure 2 It is a block diagram of a description device of a compressed air energy storage system array heat exchanger according to an embodiment of the present application.

[0085] like Figure 2 As shown, the description device 10 of the array heat exchanger of the compressed air energy storage system includes: a topology construction module 100, a matrix construction module 200 and a correction module 300.

[0086] Among them, the topology building module 100 is used to establish the array heat exchanger topology structure of the compressed air energy storage system based on a preset countercurrent heat exchanger model of the compressed air energy storage system.

[0087] The matrix construction module 200 is used to determine the mathematical description matrix corresponding to the array heat exchanger topology structure through the array heat exchanger topology structure.

[0088] The correction module 300 is used to determine whether the topological structure of the array heat exchanger has changed. If the topological structure of the array heat exchanger has changed, a corresponding correction strategy is determined according to the changed topological structure of the array heat exchanger, so as to correct the mathematical description matrix using the correction strategy. Otherwise, the topological structure of the array heat exchanger is described by the mathematical description matrix.

[0089] Optionally, in one embodiment of the present application, the matrix construction module 200 includes: a determination unit and a calculation unit.

[0090] Among them, the determination unit is used to determine the node-thermal resistance branch association matrix corresponding to the thermal resistance branch in the array heat exchanger topology structure and the node-equivalent branch first association matrix corresponding to the equivalent temperature source branch based on the array heat exchanger topology structure.

[0091] The calculation unit is used to calculate the mathematical description matrix according to the node-thermal resistance branch association matrix and the node-equivalent branch first association matrix.

[0092] Optionally, in one embodiment of the present application, the correction module 300 includes: a first transformation unit, a second transformation unit, a third transformation unit and a description unit.

[0093] Among them, the first transformation unit is used to generate a node-equivalent branch second association matrix and a first equivalent branch admittance matrix when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology structure are in a full series state of cold and hot fluids, and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, and to correct the mathematical description matrix according to the node-equivalent branch second association matrix and the first equivalent branch admittance matrix to obtain the first mathematical description correction matrix.

[0094] The second transformation unit is used to generate a node-equivalent branch third association matrix and a second equivalent branch admittance matrix when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a cold fluid series state and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, and to correct the mathematical description matrix according to the node-equivalent branch third association matrix and the second equivalent branch admittance matrix to obtain a second mathematical description correction matrix.

[0095] The third transformation unit is used to generate a node-equivalent branch fourth association matrix and a third equivalent branch admittance matrix when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a hot fluid series state and the hot fluid flows from the second heat exchanger unit to the first heat exchanger unit, and to correct the mathematical description matrix according to the node-equivalent branch fourth association matrix and the third equivalent branch admittance matrix to obtain a third mathematical description correction matrix.

[0096] A description unit is used to describe the array heat exchanger of the compressed air energy storage system based on the first mathematical description correction matrix, the second mathematical description correction matrix, or the third mathematical description correction matrix.

[0097] Optionally, in one embodiment of the present application, the mathematical expression of the mathematical description matrix is:

[0098]

[0099] Where y is the thermal resistance branch admittance matrix; A represents the node-thermal resistance branch association matrix; T represents the node temperature column vector; represents the branch heat flow column vector, R N Represents the thermal resistance of the heat exchanger.

[0100] It should be noted that the aforementioned explanation of the embodiment of the description method of the compressed air energy storage system array heat exchanger is also applicable to the description device of the compressed air energy storage system array heat exchanger of this embodiment, and will not be repeated here.

[0101] According to the description device of the array heat exchanger of the compressed air energy storage system proposed in the embodiment of the present application, it includes a topology construction module, which is used to establish the array heat exchanger topology structure of the compressed air energy storage system based on the preset countercurrent heat exchanger model of the compressed air energy storage system; a matrix construction module, which is used to determine the mathematical description matrix corresponding to the array heat exchanger topology structure through the array heat exchanger topology structure; a correction module, which is used to determine whether the array heat exchanger topology structure has changed, wherein, if the array heat exchanger topology structure has changed, a corresponding correction strategy is determined according to the transformed array heat exchanger topology structure, so as to correct the mathematical description matrix using the correction strategy, otherwise the array heat exchanger topology structure is described by the mathematical description matrix. This application helps to improve the overall performance of the compressed air energy storage heat storage and heat exchange system through precise modeling of physical properties and structural characteristics, combined with the abstract processing of electrical network theory and the flexible application of matrix operations, which can effectively improve the utilization rate of clean energy and promote energy transformation.

[0102] Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device may include:

[0103] A memory 301 , a processor 302 , and a computer program stored in the memory 301 and executable on the processor 302 .

[0104] When the processor 302 executes the program, the description method of the array heat exchanger of the compressed air energy storage system provided in the above embodiment is implemented.

[0105] Furthermore, the electronic device further comprises:

[0106] The communication interface 303 is used for communication between the memory 301 and the processor 302 .

[0107] The memory 301 is used to store computer programs that can be run on the processor 302 .

[0108] The memory 301 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0109] If the memory 301, the processor 302 and the communication interface 303 are implemented independently, the communication interface 303, the memory 301 and the processor 302 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0110] Optionally, in a specific implementation, if the memory 301, the processor 302 and the communication interface 303 are integrated on a chip, the memory 301, the processor 302 and the communication interface 303 can communicate with each other through an internal interface.

[0111] The processor 302 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0112] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described above for the array heat exchanger of a compressed air energy storage system.

[0113] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0114] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0115] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0116] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0117] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0118] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0119] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0120] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for describing an array heat exchanger for a compressed air energy storage system, characterized in that: The following steps are involved: Based on a preset countercurrent heat exchanger model of a compressed air energy storage system, an array heat exchanger topology structure of the compressed air energy storage system is established; Determining a mathematical description matrix corresponding to the array heat exchanger topology structure through the array heat exchanger topology structure; Determine whether the array heat exchanger topology structure has changed, wherein if the array heat exchanger topology structure has changed, determine a corresponding correction strategy based on the changed array heat exchanger topology structure, and use the correction strategy to correct the mathematical description matrix, otherwise the array heat exchanger topology structure is described by the mathematical description matrix.

2. The method for describing the array heat exchanger of the compressed air energy storage system according to claim 1, characterized in that: The determining of the mathematical description matrix corresponding to the array heat exchanger topology structure through the array heat exchanger topology structure includes: Based on the array heat exchanger topology structure, determining a node-thermal resistance branch association matrix corresponding to a thermal resistance branch in the array heat exchanger topology structure and a node-equivalent branch first association matrix corresponding to an equivalent temperature source branch; The mathematical description matrix is ​​calculated according to the node-thermal resistance branch association matrix and the node-equivalent branch first association matrix.

3. The method for describing the array heat exchanger of the compressed air energy storage system according to claim 2, characterized in that: If the topological structure of the array heat exchanger changes, a corresponding correction strategy is determined according to the changed topological structure of the array heat exchanger, so as to correct the mathematical description matrix by using the correction strategy, including: When the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a state of full series connection of cold and hot fluids, and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, a node-equivalent branch second association matrix and a first equivalent branch admittance matrix are generated, and the mathematical description matrix is ​​corrected according to the node-equivalent branch second association matrix and the first equivalent branch admittance matrix to obtain a first mathematical description correction matrix; When the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a cold fluid series state, and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, a node-equivalent branch third association matrix and a second equivalent branch admittance matrix are generated, and the mathematical description matrix is ​​corrected according to the node-equivalent branch third association matrix and the second equivalent branch admittance matrix to obtain a second mathematical description correction matrix; When the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a hot fluid series state, and the hot fluid flows from the second heat exchanger unit to the first heat exchanger unit, a node-equivalent branch fourth association matrix and a third equivalent branch admittance matrix are generated, and the mathematical description matrix is ​​corrected according to the node-equivalent branch fourth association matrix and the third equivalent branch admittance matrix to obtain a third mathematical description correction matrix; Based on the first mathematical description correction matrix, the second mathematical description correction matrix, or the third mathematical description correction matrix, the array heat exchanger of the compressed air energy storage system is described.

4. The method for describing the array heat exchanger of the compressed air energy storage system according to claim 2, characterized in that: The mathematical expression of the mathematical description matrix is: Wherein, y is the thermal resistance branch admittance matrix; A represents the node-thermal resistance branch association matrix; T represents the node temperature column vector; represents the branch heat flow column vector, R N Represents the thermal resistance of the heat exchanger.

5. A device for describing an array heat exchanger of a compressed air energy storage system, characterized in that: include: A topology building module, used to establish an array heat exchanger topology structure of the compressed air energy storage system based on a preset countercurrent heat exchanger model of the compressed air energy storage system; A matrix construction module, used for determining a mathematical description matrix corresponding to the array heat exchanger topology structure through the array heat exchanger topology structure; A correction module is used to determine whether the array heat exchanger topology structure has changed, wherein if the array heat exchanger topology structure has changed, a corresponding correction strategy is determined according to the changed array heat exchanger topology structure, so as to correct the mathematical description matrix using the correction strategy, otherwise the array heat exchanger topology structure is described by the mathematical description matrix.

6. The description device of the array heat exchanger of the compressed air energy storage system according to claim 5, characterized in that: The matrix building module includes: A determination unit, configured to determine, based on the array heat exchanger topology structure, a node-thermal resistance branch association matrix corresponding to a thermal resistance branch in the array heat exchanger topology structure and a node-equivalent branch first association matrix corresponding to an equivalent temperature source branch; A calculation unit is used to calculate the mathematical description matrix according to the node-thermal resistance branch association matrix and the node-equivalent branch first association matrix.

7. The description device of the array heat exchanger of the compressed air energy storage system according to claim 6, characterized in that: The correction module comprises: A first transformation unit is used for generating a second node-equivalent branch association matrix and a first equivalent branch admittance matrix when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a state of full series connection of cold and hot fluids, and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, and correcting the mathematical description matrix according to the second node-equivalent branch association matrix and the first equivalent branch admittance matrix to obtain a first mathematical description correction matrix; A second transformation unit is used for generating a node-equivalent branch third association matrix and a second equivalent branch admittance matrix when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a cold fluid series state and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, and correcting the mathematical description matrix according to the node-equivalent branch third association matrix and the second equivalent branch admittance matrix to obtain a second mathematical description correction matrix; a third transformation unit, for generating a fourth node-equivalent branch association matrix and a third equivalent branch admittance matrix when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a hot fluid series state and the hot fluid flows from the second heat exchanger unit to the first heat exchanger unit, and correcting the mathematical description matrix according to the fourth node-equivalent branch association matrix and the third equivalent branch admittance matrix to obtain a third mathematical description correction matrix; A description unit is used to describe the array heat exchanger of the compressed air energy storage system based on the first mathematical description correction matrix or the second mathematical description correction matrix or the third mathematical description correction matrix.

8. The description device of the array heat exchanger of the compressed air energy storage system according to claim 6, characterized in that: The mathematical expression of the mathematical description matrix is: Wherein, y is the thermal resistance branch admittance matrix; A represents the node-thermal resistance branch association matrix; T represents the node temperature column vector; represents the branch heat flow column vector, R N Represents the thermal resistance of the heat exchanger.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for describing the array heat exchanger of the compressed air energy storage system as described in any one of claims 1 to 4.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the description method of the array heat exchanger of the compressed air energy storage system as described in any one of claims 1 to 4.

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