Method and apparatus for describing array heat exchanger of compressed air energy storage system

Abstract

The application relates to the technical field of heat exchangers, in particular to a description method and device of an array heat exchanger of a compressed air energy storage system, wherein the method comprises the following steps: based on a preset counterflow heat exchanger model of the compressed air energy storage system, establishing an array heat exchanger topological structure of the compressed air energy storage system; determining a mathematical description matrix corresponding to the array heat exchanger topological structure through the array heat exchanger topological structure; judging whether the array heat exchanger topological structure is transformed or not, wherein if the array heat exchanger topological structure is transformed, a corresponding correction strategy is determined according to the transformed array heat exchanger topological structure, the mathematical description matrix is corrected by using the correction strategy, otherwise the array heat exchanger topological structure is described by using the mathematical description matrix. Therefore, the problems that the number of nodes and units of the array heat exchanger in the existing adiabatic compressed storage system is large and modeling is difficult are solved.

Description

TECHNICAL FIELD

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

[0002] At present, some advanced adiabatic compressed air energy storage systems have attracted widespread attention by abandoning the shortcoming that the traditional compressed air energy storage system needs a combustion chamber to heat the air delivered to the turbine.

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

[0004] However, the heat exchanger of the compressed air energy storage system is mostly a large-capacity single heat exchanger, which cannot be flexibly adjusted according to the operation requirements to adapt to different operating conditions, and it is difficult to overcome the wide operating conditions and variable operating conditions of the compressed air energy storage power station at the present stage, which needs to be solved urgently. SUMMARY

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

[0006] The first aspect embodiment of the present application provides a description method of an array heat exchanger of a compressed air energy storage system, comprising the following steps: based on a preset counter-flow heat exchanger model of the compressed air energy storage system, establishing a topological structure of an array heat exchanger of the compressed air energy storage system; determining a mathematical description matrix corresponding to the topological structure of the array heat exchanger through the topological structure of the array heat exchanger; judging whether the topological structure of the array heat exchanger is transformed, wherein if the topological structure of the array heat exchanger is transformed, determining a corresponding correction strategy according to the transformed topological structure of the array heat exchanger, and correcting the mathematical description matrix by using the correction strategy, otherwise describing the topological structure of the array heat exchanger by using the mathematical description matrix.

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

[0008] Optionally, in an embodiment of the present application, if the array heat exchanger topology is transformed, a corresponding correction strategy is determined according to the transformed array heat exchanger topology to correct the mathematical description matrix by using the correction strategy, which comprises: when a first heat exchanger unit and a second heat exchanger unit in the transformed array heat exchanger topology are in a cold and hot fluid full series state and a cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, generating a node-equivalent branch second correlation matrix and a first equivalent branch admittance matrix, and correcting the mathematical description matrix according to the node-equivalent branch second correlation 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, generating a node-equivalent branch third correlation matrix and a second equivalent branch admittance matrix, and correcting the mathematical description matrix according to the node-equivalent branch third correlation 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 a hot fluid flows from the second heat exchanger unit to the first heat exchanger unit, generating a node-equivalent branch fourth correlation matrix and a third equivalent branch admittance matrix, and correcting the mathematical description matrix according to the node-equivalent branch fourth correlation matrix and the third equivalent branch admittance matrix to obtain a third mathematical description correction matrix; and 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.

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

[0010]

[0011] wherein y is a thermal resistance branch admittance matrix; A represents the node-thermal resistance branch correlation matrix; T represents a node temperature column vector. R represents a branch heat flow column vector, R N R represents a heat exchanger thermal resistance.

[0012] The second aspect embodiment of the present application provides a description device of an array heat exchanger of a compressed air energy storage system, comprising: a topology construction module, configured to establish a topology structure of an array heat exchanger of the compressed air energy storage system based on a preset counterflow heat exchanger model of the compressed air energy storage system; a matrix construction module, configured to determine a mathematical description matrix corresponding to the topology structure of the array heat exchanger through the topology structure of the array heat exchanger; and a correction module, configured to judge whether the topology structure of the array heat exchanger is transformed, wherein if the topology structure of the array heat exchanger is transformed, a corresponding correction strategy is determined according to the transformed topology structure of the array heat exchanger, the mathematical description matrix is corrected by using the correction strategy, otherwise the topology structure of the array heat exchanger is described by using the mathematical description matrix.

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

[0014] Optionally, in one embodiment of the present application, the correction module includes: a first transformation unit for generating 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 correcting 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 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. 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; a 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 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; 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.

[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] A third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored on 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 the above embodiment.

[0019] The fourth aspect of the present application provides a computer readable storage medium storing a computer program, which is executed by a processor to implement the description method of the array heat exchanger of the compressed air energy storage system as above.

[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 the counterflow heat exchanger model of the preset 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 is transformed, wherein if the array heat exchanger topology structure is transformed, determine the corresponding correction strategy according to the transformed array heat exchanger topology structure to correct the mathematical description matrix by using the correction strategy, otherwise describe the array heat exchanger topology structure by the mathematical description matrix. Through the accurate physical characteristics and structural characteristics modeling, combined with the abstract processing of the electric network theory and the flexible application of matrix operation, the overall performance of the compressed air energy storage heat storage and heat exchange system can be improved, the utilization rate of clean energy can be effectively improved, and the energy transformation can be promoted. Therefore, the problems of large number of array heat exchanger nodes and units in the existing adiabatic compressed storage system, and difficult modeling are solved.

[0022] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, in which:

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

[0025] Figure 2 An example diagram of a description device of an array heat exchanger of a compressed air energy storage system according to an embodiment of the present application is provided.

[0026] Figure 3 A structural schematic diagram of an electronic device according to an embodiment of the present application is provided.

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

[0028] Embodiments of the present application are described below in detail, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0029] The description method and device of the array heat exchanger of the compressed air energy storage system of the embodiments of the present application are described below with reference to the accompanying drawings. In view of the problems mentioned in the background art, 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 counterflow heat exchanger model of the preset 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; it is judged whether the array heat exchanger topology structure is transformed, wherein if the array heat exchanger topology structure is transformed, the corresponding correction strategy is determined according to the transformed array heat exchanger topology structure, so as to correct the mathematical description matrix by using the correction strategy, otherwise the array heat exchanger topology structure is described by the mathematical description matrix. Through the accurate physical property and structural characteristic modeling, combined with the abstract processing of the electric network theory and the flexible application of matrix operation, the overall performance of the compressed air energy storage heat storage and heat exchange system can be improved, the utilization rate of clean energy can be effectively improved, and the energy transformation can be promoted. Thus, the problems of large number of nodes and units of the array heat exchanger in the existing adiabatic compressed storage system, and difficult modeling are solved.

[0030] Specifically, Figure 1 A flowchart of the description method of the array heat exchanger of the compressed air energy storage system provided by the embodiments of the present application.

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

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

[0033] The embodiments of the present application can first establish the counterflow heat exchanger model of the compressed air energy storage system, and establish the array heat exchanger topology structure based on the counterflow heat exchanger model and the electric network related theory, so as to utilize the electric network theory to formulaize the heat exchanger topology network relationship, and improve the efficiency of calculating the related thermal physical quantities.

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

[0035]

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

[0037]

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

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

[0040]

[0041] where the subscript o represents outlet; from the above formula, it can be seen that the heat exchanger unit can be represented by the connection of the heat resistance R and the equivalent temperature element .

[0042] When the topology modeling of the heat exchange network is performed, the embodiments of the present application need to consider the distribution and integration of the air mass flow rate, and if the combination of series and parallel is performed at the non-total inlet and outlet, the air mass flow rate of each heat exchanger unit will be very complex to calculate, which can possibly lead to the decrease of the overall air mass flow rate of the system.

[0043] The physical characteristics determine that there will be some restrictions in the formation of the CHEN, and generally speaking, parallel is only allowed to appear at the total inlet and total outlet of the heat exchanger, and therefore the overall structure of the CHEN should be that a plurality of heat exchanger units in different numbers are connected in series and then connected in parallel.

[0044] In the embodiments of the present application, the connection modes of the cold and hot fluids in the heat exchanger need to be considered respectively. In the compressed air energy storage power station, after the heat exchange of the heat conducting oil in the heat exchanger is completed, the heat conducting oil is mostly transported to the low-temperature oil storage to be ready for heat exchange with the hot air transported to the gas storage by the compressor in the compression process, and therefore, if only the air side is connected in series and the heat conducting oil is connected in parallel, i.e. the inlet temperature of the heat conducting oil of each heat exchanger unit is the initial temperature of the heat conducting oil.

[0045] In actual implementation, embodiments of the present application can make corresponding assumptions for the above requirements: different connection modes are used for cold and hot fluids of each heat exchange unit, but all follow the rule that parallel connection is only at the total inlet and outlet. Therefore, according to the assumption, the heat exchangers in embodiments of the present application mainly include two connection modes of full series connection of cold and hot fluids and single fluid series connection, so as to determine the array type heat exchanger topology structure, so as to take into account the physical realizability and performance improvement ability of the heat exchanger topology network.

[0046] Therefore, embodiments of the present application construct an accurate counterflow heat exchanger model through the physical characteristics of the counterflow heat exchanger, so as to capture the heat exchange efficiency of the compressed air energy storage system. In addition, embodiments of the present application abstract the heat exchanger topology network into an electric network by referring to the electric network theory, so as to greatly simplify the modeling complexity caused by the large number of heat exchanger nodes and units, so as to 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 type heat exchanger topology structure is determined through the array type heat exchanger topology structure.

[0048] After the array type heat exchanger topology structure is established, further, embodiments of the present application can also determine the mathematical description matrix corresponding thereto through the array type heat exchanger topology structure.

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

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

[0051] According to the foregoing neglect, the elements related to the cold and hot fluid outlet nodes will not appear in M. For a CHEN with N heat exchanger units, embodiments of the present application can assume that all heat exchanger units are in parallel as the base state, and G c , G h are equal.

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

[0053] Optionally, in an 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 incidence matrix; T represents the node temperature column vector; represents the branch heat flow column vector, and R N represents the heat exchanger thermal resistance.

[0056] In embodiments of the present application, when it is assumed that all heat exchanger units are in parallel as the base state, and G c , G h 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 incidence matrix; T represents the node temperature column vector; represents the branch heat flow column vector, and R N represents the heat exchanger thermal resistance.

[0059] At this time, the inlet temperatures of all cold and hot fluids are known quantities, so the above formula can be easily solved to obtain which is brought into the temperature equation related to the cold and hot fluid outlet nodes, so that the outlet temperatures of all heat exchangers can be obtained.

[0060] In step S103, it is judged whether the array heat exchanger topology is transformed, wherein if the array heat exchanger topology is transformed, a corresponding correction strategy is determined according to the transformed array heat exchanger topology, and the mathematical description matrix is corrected by using the correction strategy, otherwise the array heat exchanger topology is described by the mathematical description matrix.

[0061] Further, the embodiment of the present application can also analyze the array heat exchanger topology to judge whether the structure of the array heat exchanger topology is transformed, if the structure of the array heat exchanger topology is not transformed, the array heat exchanger topology can be described by the above-mentioned mathematical description matrix, if the structure of the array heat exchanger topology is transformed, a corresponding correction strategy can be formulated according to the transformed array heat exchanger topology, the above-mentioned mathematical description matrix is quickly corrected by the corresponding correction strategy to obtain a corresponding mathematical description correction matrix, and the transformed array heat exchanger topology is quickly and accurately described by the mathematical description correction matrix, so that the flexibility of the array heat exchanger topology is effectively improved, and the accuracy and adaptability of the array heat exchanger topology under different working conditions are effectively ensured.

[0062] Alternatively, in an embodiment of the present application, if the array heat exchanger topology is transformed, a corresponding correction strategy is determined according to the transformed array heat exchanger topology, and the mathematical description matrix is corrected 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 cold-hot fluid full series state, and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, a node-equivalent branch second incidence matrix and a first equivalent branch admittance matrix are generated, and the mathematical description matrix is corrected according to the node-equivalent branch second incidence 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 incidence matrix and a second equivalent branch admittance matrix are generated, and the mathematical description matrix is corrected according to the node-equivalent branch third incidence 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 incidence matrix and a third equivalent branch admittance matrix are generated, and the mathematical description matrix is corrected according to the node-equivalent branch fourth incidence matrix and the third equivalent branch admittance matrix to obtain a third mathematical description correction matrix; the array heat exchanger of the compressed air energy storage system is described based on the first mathematical description correction matrix or the second mathematical description correction matrix or the third mathematical description correction matrix.

[0063] In actual execution process, when the array heat exchanger topology is changed, the embodiment of the application can correct the above mathematical description matrix according to the following two correction strategies, and obtain the outlet temperature of cold and hot fluid, as follows:

[0064] 1. When the heat exchanger unit l (i.e. the first heat exchanger unit) and the heat exchanger unit n (i.e. the second heat exchanger unit) are in full series connection of cold and hot fluid, and the cold fluid flows from the heat exchanger unit l to the heat exchanger unit n, the embodiment of the application needs to generate the node-equivalent branch association matrix (i.e. the node-equivalent branch second association matrix) M and the equivalent branch admittance matrix (i.e. the first equivalent branch admittance matrix) y eq , as shown in the following formula:

[0065]

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

[0067] Therefore, the embodiment of the application can supplement and correct the heat exchange network equation (i.e. the above 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 follows:

[0068]

[0069] , wherein , and subtracting the equation involving in from , the other equations in can be easily obtained according to the inlet and outlet temperatures of the fluid.

[0070] 2. When the heat exchanger unit l and the heat exchanger unit n are in series connection of cold fluid, and the cold fluid flows from the heat exchanger unit l to the heat exchanger unit n, the similar node-equivalent branch association matrix (i.e. the node-equivalent branch third association matrix) M and the equivalent branch admittance matrix (i.e. the second equivalent branch admittance matrix) y eq , as shown in the following formula:

[0071]

[0072] Therefore, the embodiment of the application can supplement and correct the heat exchange network equation (i.e. the above 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 follows:

[0073]

[0074] wherein, and the described in the equation is subtracted from , that is, the Other equations in

[0075] 3、When the heat exchanger unit l and the heat exchanger unit n are in series for the hot fluid, and the hot fluid flows from the heat exchanger unit n to the heat exchanger unit 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 in the following formula:

[0076]

[0077] Therefore, the embodiments of the present application can supplement and modify 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 to obtain the third mathematical description modification matrix as shown below:

[0078]

[0079] wherein, The calculation method of the outlet temperature is the same as the above calculation strategy, and will not be described here; and when the topology structure needs to be transformed, the embodiments of the present application can delete the corresponding elements in eq and the corresponding columns in M, and add new elements and columns according to the connection mode.

[0080] Further, 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 modification matrix or the second mathematical description modification matrix or the third mathematical description modification matrix.

[0081] Therefore, the embodiments of the present application provide a high-efficiency and reliable modeling method for the array heat exchanger topology network in the compressed air energy storage system by accurate physical property and structural feature modeling, combined with the abstract processing of the electric network theory and the flexible application of matrix operation, which helps to improve the overall performance of the compressed air energy storage heat storage and heat exchange system, and can effectively improve the utilization rate of clean energy and promote energy transformation.

[0082] The method for describing the array heat exchanger of the compressed air energy storage system according to the embodiment of the application comprises the following steps: establishing the array heat exchanger topology structure of the compressed air energy storage system based on a preset counterflow heat exchanger model of the compressed air energy storage system; determining the mathematical description matrix corresponding to the array heat exchanger topology structure through the array heat exchanger topology structure; judging whether the array heat exchanger topology structure is transformed, wherein if the array heat exchanger topology structure is transformed, the corresponding correction strategy is determined according to the transformed array heat exchanger topology structure, and the mathematical description matrix is corrected by using the correction strategy, otherwise the array heat exchanger topology structure is described by using the mathematical description matrix. Through the accurate physical characteristics and structural characteristics modeling, the abstract processing of the electric network theory, and the flexible application of the matrix operation, the overall performance of the compressed air energy storage heat storage and heat exchange system can be improved, the utilization rate of clean energy can be effectively improved, and the energy transformation can be promoted.

[0083] Secondly, the device for describing the array heat exchanger of the compressed air energy storage system according to the embodiment of the application is described with reference to the accompanying drawings.

[0084] Figure 2 The device for describing the array heat exchanger of the compressed air energy storage system according to the embodiment of the application is a block schematic diagram.

[0085] As shown in the device for describing the array heat exchanger of the compressed air energy storage system 10, the device for describing the array heat exchanger of the compressed air energy storage system 10 comprises a topology construction module 100, a matrix construction module 200 and a correction module 300. Figure 2 The topology construction module 100 is configured to establish the array heat exchanger topology structure of the compressed air energy storage system based on a preset counterflow heat exchanger model of the compressed air energy storage system.

[0086] The matrix construction module 200 is configured to determine the mathematical description matrix corresponding to the array heat exchanger topology structure through the array heat exchanger topology structure.

[0087] The correction module 300 is configured to judge whether the array heat exchanger topology structure is transformed, wherein if the array heat exchanger topology structure is transformed, the corresponding correction strategy is determined according to the transformed array heat exchanger topology structure, and the mathematical description matrix is corrected by using the correction strategy, otherwise the array heat exchanger topology structure is described by using the mathematical description matrix.

[0088] Optionally, in an embodiment of the application, the matrix construction module 200 comprises a determination unit and a calculation unit.

[0089]

[0090] ​The determining unit is configured to determine, based on the array heat exchanger topology, a node-thermal resistance branch correlation matrix corresponding to a thermal resistance branch in the array heat exchanger topology and a node-equivalent branch first correlation matrix corresponding to an equivalent temperature source branch.

[0091] The calculating unit is configured to calculate a mathematical description matrix according to the node-thermal resistance branch correlation matrix and the node-equivalent branch first correlation matrix.

[0092] Optionally, in an embodiment of the present application, the modifying module 300 comprises a first transforming unit, a second transforming unit, a third transforming unit and a describing unit.

[0093] The first transforming unit is configured to, when the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology are in a cold-hot fluid full series state and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, generate a node-equivalent branch second correlation matrix and a first equivalent branch admittance matrix, and modify the mathematical description matrix according to the node-equivalent branch second correlation matrix and the first equivalent branch admittance matrix to obtain a first mathematical description modification matrix.

[0094] The second transforming unit is configured to, 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, generate a node-equivalent branch third correlation matrix and a second equivalent branch admittance matrix, and modify the mathematical description matrix according to the node-equivalent branch third correlation matrix and the second equivalent branch admittance matrix to obtain a second mathematical description modification matrix.

[0095] The third transforming unit is configured to, 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, generate a node-equivalent branch fourth correlation matrix and a third equivalent branch admittance matrix, and modify the mathematical description matrix according to the node-equivalent branch fourth correlation matrix and the third equivalent branch admittance matrix to obtain a third mathematical description modification matrix.

[0096] The describing unit is configured to describe the array heat exchanger of the compressed air energy storage system based on the first mathematical description modification matrix or the second mathematical description modification matrix or the third mathematical description modification matrix.

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

[0098]

[0099] 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 heat exchanger thermal resistance.

[0100] It should be noted that the foregoing description of the embodiment of the description method of the array heat exchanger of the compressed air energy storage system also applies to the description device of the array heat exchanger of the compressed air energy storage system of the embodiment, which will not be described here.

[0101] The description device of the array heat exchanger of the compressed air energy storage system provided in the embodiment of the application comprises a topology construction module, which is configured to establish the topology structure of the array heat exchanger of the compressed air energy storage system based on a preset counterflow heat exchanger model of the compressed air energy storage system; a matrix construction module, which is configured to determine the mathematical description matrix corresponding to the topology structure of the array heat exchanger through the topology structure of the array heat exchanger; and a correction module, which is configured to determine whether the topology structure of the array heat exchanger is transformed, wherein if the topology structure of the array heat exchanger is transformed, a corresponding correction strategy is determined according to the transformed topology structure of the array heat exchanger, and the mathematical description matrix is corrected by using the correction strategy, otherwise the topology structure of the array heat exchanger is described by using the mathematical description matrix. Through the accurate physical characteristics and structural characteristics modeling, the abstract processing of the electric network theory, and the flexible application of the matrix operation, the overall performance of the compressed air energy storage heat storage and heat exchange system can be improved, the utilization rate of clean energy can be effectively improved, and the energy transformation can be promoted.

[0102] Figure 3 The structure schematic diagram of the electronic device provided in the embodiment of the application is shown. The electronic device can comprise:

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

[0104] The processor 302 implements the description method of the array heat exchanger of the compressed air energy storage system provided in the above embodiment when executing the program.

[0105] Further, the electronic device further comprises:

[0106] The communication interface 303 is configured to communicate between the memory 301 and the processor 302.

[0107] The memory 301 is configured to store the computer program executable on the processor 302.

[0108] The memory 301 can include a high-speed RAM memory, and can also include a non-volatile memory, for example, 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 with each other through a bus and complete communication between 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, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, Figure 3 In the figure, only one thick line is used to represent the bus, but it 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 complete communication between each other through an internal interface.

[0111] The processor 302 can 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] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the description method of the compressed air energy storage system array heat exchanger.

[0113] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0114] Moreover, the terms "first", "second", "third", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of instances indicated. Thus, features defined with "first", "second" can explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "N" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0115] Any process or method descriptions or blocks in flow charts herein, and elsewhere, can be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps in the process. Alternate implementations are included within the scope of the preferred embodiments of the present application in which additional functionality can be added or some functionality can be removed, by, for example, adding one or more steps performing a similar or reciprocal function, combining two or more steps into a single step, or splitting one step into two or more steps.

[0116] The logic and / or steps represented in flow charts herein, and elsewhere, can be considered as a sequence of executable instructions, for implementing the logic functions, which can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer-readable medium can specifically include a hardware apparatus (e.g., an electrical connection having one or more wires, a portable computer diskette, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, and a portable compact disc read-only memory (CDROM)). Additionally, the computer-readable medium can be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via an optical scanner, then compiled, interpreted, or otherwise processed, and stored upon a computer memory in order to be executed.

[0117] It should be understood that parts of the present application can be realized in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be realized by software or firmware stored in a memory and executed by a suitable instruction execution system. If realized in hardware and in another embodiment, any one or a combination of the following technologies known in the art can be used: discrete logic circuit with logic gate circuit for implementing logic functions on data signals, application specific integrated circuit with suitable combination logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA), etc.

[0118] Those skilled in the art of the present technology can understand that all or part of the steps carried out by the above-mentioned embodiment methods can be completed by a program instructing the relevant hardware, and the program can be stored in a computer readable storage medium. When the program is executed, it includes one of the steps of the method embodiment or a combination thereof.

[0119] In addition, each functional unit in each embodiment of the present application can be integrated into one processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The above integrated module can be realized in the form of hardware or in the form of a software functional module. The integrated module, if realized in the form of a software functional module and sold or used as an independent product, can also be stored in a computer readable storage medium.

[0120] The above-mentioned storage medium can 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 should be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. A method of describing an array heat exchanger of a compressed air energy storage system, characterized by, The method comprises the following steps: Based on the 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; A mathematical description matrix corresponding to the array heat exchanger topology structure is determined through the array heat exchanger topology structure; It is judged whether the array heat exchanger topology structure is transformed, wherein if the array heat exchanger topology structure is transformed, a corresponding correction strategy is determined according to the transformed array heat exchanger topology structure, and the mathematical description matrix is corrected by using the correction strategy, otherwise the array heat exchanger topology structure is described by using the mathematical description matrix; If the array heat exchanger topology structure is transformed, a corresponding correction strategy is determined according to the transformed array heat exchanger topology structure, and the mathematical description matrix is corrected by using the correction strategy, which comprises: When the first heat exchanger unit and the second heat exchanger unit in the transformed array heat exchanger topology structure are in a cold-hot fluid full series state, and the cold fluid flows from the first heat exchanger unit to the second heat exchanger unit, a node-equivalent branch second incidence matrix and a first equivalent branch admittance matrix are generated, and the mathematical description matrix is corrected according to the node-equivalent branch second incidence 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 structure 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 incidence matrix and a second equivalent branch admittance matrix are generated, and the mathematical description matrix is corrected according to the node-equivalent branch third incidence 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 structure 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 incidence matrix and a third equivalent branch admittance matrix are generated, and the mathematical description matrix is corrected according to the node-equivalent branch fourth incidence matrix and the third equivalent branch admittance matrix to obtain a third mathematical description correction matrix; The array heat exchanger of the compressed air energy storage system is described based on the first mathematical description correction matrix or the second mathematical description correction matrix or the third mathematical description correction matrix.

2. The method of claim 1, wherein, The mathematical description matrix corresponding to the array heat exchanger topology structure is determined through the array heat exchanger topology structure, which comprises: Based on the array heat exchanger topology structure, a node-thermal resistance branch incidence matrix corresponding to a thermal resistance branch in the array heat exchanger topology structure and a node-equivalent branch first incidence matrix corresponding to an equivalent temperature source branch are determined; The mathematical description matrix is calculated according to the node-thermal resistance branch incidence matrix and the node-equivalent branch first incidence matrix.

3. The method of claim 2, wherein, The mathematical expression of the mathematical description matrix is: where y is the thermal resistance branch admittance matrix; A represents the node-thermal resistance branch incidence matrix; T represents the node temperature column vector; R represents the branch thermal flow column vector, and R N represents the thermal resistance of the heat exchanger; the subscripts c and h respectively represent the cold fluid and the hot fluid; i represents the import; and N represents the number of heat exchanger units.

4. A compressed air energy storage system array heat exchanger description device, characterized by, It comprises: A topology construction module is configured to construct an array heat exchanger topology of a compressed air energy storage system based on a preset counter-flow heat exchanger model of the compressed air energy storage system; A matrix construction module is configured to determine a mathematical description matrix corresponding to the array heat exchanger topology through the array heat exchanger topology; A correction module is configured to determine whether the array heat exchanger topology is transformed, and if the array heat exchanger topology is transformed, to determine a correction strategy according to the transformed array heat exchanger topology, and to correct the mathematical description matrix by using the correction strategy, or to describe the array heat exchanger topology by using the mathematical description matrix if the array heat exchanger topology is not transformed. The correction module includes: A first conversion unit is configured to generate a node-equivalent branch second incidence matrix and a first equivalent branch admittance matrix when a first heat exchanger unit and a second heat exchanger unit in the transformed array heat exchanger topology are in a cold-hot fluid full series state and a 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 incidence matrix and the first equivalent branch admittance matrix to obtain a first mathematical description correction matrix. A second conversion unit is configured to generate a node-equivalent branch third incidence 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 incidence matrix and the second equivalent branch admittance matrix to obtain a second mathematical description correction matrix. A third conversion unit is configured to generate a node-equivalent branch fourth incidence 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 a 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 incidence matrix and the third equivalent branch admittance matrix to obtain a third mathematical description correction matrix. A description unit is configured 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.

5. The compressed air energy storage system array heat exchanger description device of claim 4, wherein, The matrix construction module includes: A determination unit is configured to determine a node-thermal resistance branch incidence matrix corresponding to a thermal resistance branch in the array heat exchanger topology and a node-equivalent branch first incidence matrix corresponding to an equivalent temperature source branch in the array heat exchanger topology based on the array heat exchanger topology. A calculation unit is configured to calculate the mathematical description matrix according to the node-thermal resistance branch incidence matrix and the node-equivalent branch first incidence matrix.

6. The compressed air energy storage system array heat exchanger description device of claim 5, wherein, The mathematical expression of the mathematical description matrix is: where y is the thermal resistance branch admittance matrix; A represents the node-thermal resistance branch incidence matrix; T represents the node temperature column vector; R represents the branch thermal flow column vector, and R N R represents the heat exchanger thermal resistance; the subscripts c and h respectively represent the cold fluid and the hot fluid; i represents the import; and N represents the number of heat exchanger units.

7. An electronic device, comprising: The mathematical expression includes: Memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the method of describing an array heat exchanger of a compressed air energy storage system as claimed in any of claims 1-3.

8. A computer readable storage medium having stored thereon a computer program, characterized in that, The program is executed by a processor for implementing the method of describing an array heat exchanger of a compressed air energy storage system as claimed in any of claims 1-3.

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