Simulation design method, device, computer device and storage device

Abstract

This invention belongs to the field of simulation design technology, and particularly relates to a simulation design method, apparatus, computer device, and storage device for phase change energy storage heat exchangers. The simulation design method includes the following steps: receiving a set of design target parameters input by the user; determining the basic phase change energy storage heat exchanger unit; obtaining initial simulation results; obtaining a preliminary design configuration of the phase change energy storage heat exchanger; based on the initial design configuration of the phase change energy storage heat exchanger, determining whether it meets the target requirement parameters in the design target parameter set; if yes, outputting the design scheme; if not, iteratively optimizing the initial design configuration of the phase change energy storage heat exchanger until the design configuration of the phase change energy storage heat exchanger meets the target requirement parameters, and outputting the final design scheme. When operating conditions change, by modifying the design parameters, a new final design scheme for the phase change energy storage heat exchanger can be obtained quickly, accurately, and efficiently, improving the design efficiency of the phase change energy storage heat exchanger and reducing design costs.

Description

Technical Field

[0001] This invention belongs to the field of simulation design technology, and in particular relates to a simulation design method, apparatus, computer device and storage device for a phase change energy storage heat exchanger. Background Technology

[0002] As space payloads become increasingly powerful, spacecraft thermal control systems relying solely on radiators can no longer dissipate heat effectively. Furthermore, high-power space payloads typically experience high instantaneous heat flux densities during operation, but their operational duration is relatively short. Therefore, incorporating phase change energy storage heat exchangers into the thermal control systems of spacecraft with high-power payloads is essential. During high-power payload operation, heat is initially stored within the phase change energy storage heat exchanger; when the high-power payload ceases operation, the heat is then dissipated from the phase change energy storage heat exchanger into space.

[0003] Currently, the aerospace field uses traditional phase change energy storage heat exchangers with paraffin as the phase change material, which have relatively low heat storage capacity and energy-to-weight ratio. To reduce heat exchanger weight and improve the energy-to-weight ratio, the structure of the phase change energy storage heat exchanger needs to be optimized. Generally, for a given heat exchanger operating condition for a high-power space payload, designers often first design the structural details of the heat exchanger based on design manuals, subjective judgment based on experience, and process requirements. Then, they verify the merits of this structural design through simulation calculations and experimental tests. This is followed by a series of design processes: "design modification - simulation calculation - experimental testing - redesign modification - resimulation calculation - re-experimental testing," until the heat exchanger's structural design meets the requirements. This design method is time-consuming and labor-intensive, and the final result may meet the energy-to-weight ratio requirements, but it is not necessarily the optimal solution. Furthermore, when the operating conditions change, the above steps need to be repeated, leading to repeated design, calculation, optimization, and testing of the heat exchanger, resulting in a long development cycle and high costs. Summary of the Invention

[0004] The purpose of this invention is to provide a simulation design method, apparatus, computer device, and storage device for phase change energy storage heat exchangers. This aims to solve the problem that existing phase change energy storage heat exchangers require manual design and repeated design processes of "design correction - simulation calculation - test - redesign correction - resimulation calculation - retest," resulting in long development cycles and high costs.

[0005] The present invention is implemented as follows: a simulation design method for a phase change energy storage heat exchanger is provided, comprising the following steps:

[0006] S1. Receive the design target parameter set input by the user, the design target parameter set including the maximum external dimensions of the phase change energy storage heat exchanger;

[0007] S2. Based on the structural type of the phase change energy storage heat exchanger, a basic phase change energy storage heat exchanger unit is extracted, and the initial size parameters of the basic phase change energy storage heat exchanger unit are determined based on the minimum achievable processing technology.

[0008] S3. Receive the initial length parameter of the basic phase change energy storage heat exchanger unit input by the user, calculate the initial quantity parameter of the basic phase change energy storage heat exchanger unit, and perform simulation calculation on the basic phase change energy storage heat exchanger unit to obtain the initial simulation results.

[0009] S4. Based on the initial quantity parameters of the basic phase change energy storage heat exchanger units, the initial simulation results, and the maximum external dimensions of the phase change energy storage heat exchanger, arrange multiple basic phase change energy storage heat exchanger units in space to form a preliminary design configuration of the phase change energy storage heat exchanger.

[0010] S5. Based on the initial design configuration of the phase change energy storage heat exchanger, determine whether it meets the target requirement parameters in the design target parameter set. If yes, output the design scheme; otherwise, iteratively optimize the initial design configuration of the phase change energy storage heat exchanger until the design configuration of the phase change energy storage heat exchanger meets the target requirement parameters, and output the final design scheme.

[0011] In some implementations, the target requirement parameters include a target energy-to-weight ratio and a target flow resistance. The step of determining whether the target requirement parameters in the design target parameter set are met based on the initial design configuration of the phase change energy storage heat exchanger includes the following steps:

[0012] Based on the initial design configuration of the phase change energy storage heat exchanger, determine whether the estimated energy-to-mass ratio of the initial design configuration of the phase change energy storage heat exchanger is not less than the target energy-to-mass ratio, and whether the estimated flow resistance is not higher than the target flow resistance.

[0013] In some implementations, the design target parameter set includes a target outlet temperature value. The iterative optimization of the initial design configuration of the phase change energy storage heat exchanger until the design configuration of the phase change energy storage heat exchanger meets the target requirement parameters, and the final design scheme is output, includes the following steps:

[0014] S51. Using the initial size parameters and / or quantity parameters of the basic phase change energy storage heat exchanger unit as optimization variables, the target outlet temperature value and the target flow resistance as constraints, and maximizing the energy-to-mass ratio and / or the phase change rate of the phase change material of the basic phase change energy storage heat exchanger unit as optimization objectives, perform multi-objective optimization.

[0015] S52. Substitute the optimized variables into S3 and S4, and perform S5 for re-evaluation. When the estimated energy-to-mass ratio of the phase change energy storage heat exchanger design configuration after iterative optimization is not less than the target energy-to-mass ratio, and the estimated flow resistance is not higher than the target flow resistance, output the final design scheme.

[0016] In some implementations, the step of extracting a basic phase change energy storage heat exchanger unit based on the structural type of the target phase change energy storage heat exchanger includes the following steps:

[0017] Based on a plate-fin phase change energy storage heat exchanger, a region containing a complete layer of phase change material and its adjacent fluid channels is selected as the basic phase change energy storage heat exchanger unit; or

[0018] Based on the capillary phase change energy storage heat exchanger, a portion containing a single sensing tube and the surrounding phase change material is selected as the basic phase change energy storage heat exchanger unit.

[0019] In some embodiments, the simulation calculation of the basic phase change energy storage heat exchanger unit includes the following steps:

[0020] The UDF function is called to perform simulation calculations on the basic phase change energy storage heat exchanger unit. The UDF function is configured to dynamically set the outlet temperature value of the basic phase change energy storage heat exchanger unit calculated at the current time step, combined with the preset or calculated inlet and outlet temperature difference value, as the inlet temperature condition for the next time step during the transient simulation.

[0021] In some embodiments, after the step of spatially arranging the plurality of the basic phase change energy storage heat exchanger units to form a preliminary design configuration of the phase change energy storage heat exchanger, the following steps are further included:

[0022] Based on the preliminary design configuration of the phase change energy storage heat exchanger, the estimated total weight of the phase change energy storage heat exchanger is calculated.

[0023] The process of determining whether the initial design configuration of the phase change energy storage heat exchanger meets the target requirement parameters in the design target parameter set includes the following steps:

[0024] Based on the initial design configuration and estimated total weight of the phase change energy storage heat exchanger, determine whether it meets the target requirement parameters in the design target parameter set.

[0025] In some embodiments, calculating the estimated total weight of the phase change energy storage heat exchanger based on its preliminary design configuration includes the following steps:

[0026] Determine the structural form of the head assembly that matches the initial design configuration of the phase change energy storage heat exchanger;

[0027] Based on the weight of the phase change energy storage heat exchanger core corresponding to the phase change energy storage heat exchanger, the weight of the head assembly is estimated according to a preset ratio.

[0028] The estimated total weight of the phase change energy storage heat exchanger is obtained by adding the weight of the phase change energy storage heat exchanger core and the weight of the head assembly.

[0029] Another embodiment of the present invention also provides a simulation design device for a phase change energy storage heat exchanger, comprising:

[0030] The parameter set generation module is used to receive the design target parameter set input by the user, which includes the maximum external dimensions of the phase change energy storage heat exchanger.

[0031] The basic unit extraction module is used to extract basic phase change energy storage heat exchanger units based on the structural type of the phase change energy storage heat exchanger. The initial size parameters of the basic phase change energy storage heat exchanger units are determined based on the minimum achievable processing technology.

[0032] The simulation calculation module is used to receive the initial length parameter of the basic phase change energy storage heat exchanger unit input by the user, calculate the initial quantity parameter of the basic phase change energy storage heat exchanger unit, and perform simulation calculation on the basic phase change energy storage heat exchanger unit to obtain the initial simulation results.

[0033] The layout design module is used to spatially arrange multiple basic phase change energy storage heat exchanger units according to the initial quantity parameters of the basic phase change energy storage heat exchanger units, the initial simulation results, and the maximum external dimensions of the phase change energy storage heat exchanger to form a preliminary design configuration of the phase change energy storage heat exchanger.

[0034] The scheme output module is used to determine whether the initial design configuration of the phase change energy storage heat exchanger meets the target requirement parameters in the design target parameter set. If yes, the design scheme is output; otherwise, the initial design configuration of the phase change energy storage heat exchanger is iteratively optimized until the design configuration of the phase change energy storage heat exchanger meets the target requirement parameters, and the final design scheme is output.

[0035] Another embodiment of the present invention provides a computer device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the simulation design method as described in any of the embodiments of the present invention.

[0036] Another embodiment of the present invention provides a storage device storing a computer program that can be executed to implement the steps of the simulation design method as described in any of the embodiments of the present invention.

[0037] The simulation design method for phase change energy storage heat exchangers provided in this invention allows users to input various design parameters and automatically and intelligently output the final design scheme of the phase change energy storage heat exchanger. When the operating conditions change, by modifying the design parameters, a new final design scheme for the phase change energy storage heat exchanger can be obtained quickly, accurately, and efficiently, thereby improving the design efficiency of the phase change energy storage heat exchanger and reducing the design cost. Attached Figure Description

[0038] Figure 1 This is a flowchart of the simulation design method for a phase change energy storage heat exchanger provided in the embodiments of the present invention;

[0039] Figure 2 This is a schematic diagram of the phase change energy storage heat exchange unit corresponding to the plate-fin phase change energy storage heat exchanger provided in the embodiment of the present invention.

[0040] Figure 3 The embodiments of the present invention are based on Figure 2 A magnified view of part A;

[0041] Figure 4 This is a schematic diagram of the phase change energy storage heat exchange core corresponding to the plate-fin type phase change energy storage heat exchanger provided in the embodiments of the present invention.

[0042] Figure 5 The embodiments of the present invention are based on Figure 4 A magnified view of part B;

[0043] Figure 6 This is a schematic diagram of a plate-fin phase change energy storage heat exchanger provided in an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of a capillary phase change energy storage heat exchanger provided in an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of the removal of the main body in the capillary phase change energy storage heat exchanger provided in the embodiment of the present invention;

[0046] Figure 9 This is a partial cross-sectional schematic diagram of the capillary phase change energy storage heat exchanger provided in the embodiment of the present invention.

[0047] Figure 10 This is a schematic diagram of a polyhedral or other regular phase change energy storage heat exchange core provided in an embodiment of the present invention;

[0048] Figure 11 This is a schematic diagram of the first type of end cap assembly provided in an embodiment of the present invention;

[0049] Figure 12This is a schematic diagram of the second type of end cap assembly provided in an embodiment of the present invention;

[0050] Figure 13 This is a structural block diagram of the simulation design device for a phase change energy storage heat exchanger provided in the embodiments of the present invention. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the invention, and should not be construed as limiting the invention. Furthermore, it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0052] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0057] refer to Figure 1 This invention provides a simulation design method for a phase change energy storage heat exchanger, comprising the following steps:

[0058] S1. Receive the design target parameter set input by the user, the design target parameter set including the maximum external dimensions of the phase change energy storage heat exchanger;

[0059] S2. Based on the structural type of the phase change energy storage heat exchanger, a basic phase change energy storage heat exchanger unit is extracted, and the initial size parameters of the basic phase change energy storage heat exchanger unit are determined based on the minimum achievable processing technology.

[0060] S3. Receive the initial length parameter of the basic phase change energy storage heat exchanger unit input by the user, calculate the initial quantity parameter of the basic phase change energy storage heat exchanger unit, and perform simulation calculation on the basic phase change energy storage heat exchanger unit to obtain the initial simulation results.

[0061] S4. Based on the initial quantity parameters of the basic phase change energy storage heat exchanger units, the initial simulation results, and the maximum external dimensions of the phase change energy storage heat exchanger, arrange multiple basic phase change energy storage heat exchanger units in space to form a preliminary design configuration of the phase change energy storage heat exchanger.

[0062] S5. Based on the initial design configuration of the phase change energy storage heat exchanger, determine whether it meets the target requirement parameters in the design target parameter set. If yes, output the design scheme; otherwise, iteratively optimize the initial design configuration of the phase change energy storage heat exchanger until the design configuration of the phase change energy storage heat exchanger meets the target requirement parameters, and output the final design scheme.

[0063] First, it receives the user-inputted set of design target parameters, such as the working fluid volumetric flow rate V. f Total heat storage Q s Thermal storage time t, outlet temperature T reout Target energy-to-quality ratio Target flow resistance Δp re The maximum external dimensions of the phase change energy storage heat exchanger. The units of all design parameters in the design target parameter set are unified to SI units, which is beneficial for subsequent simulation design processes, reduces the probability of errors, and also facilitates users in adjusting various design parameters later.

[0064] Next, based on the structural type of the phase change energy storage heat exchanger, such as a plate-fin or capillary phase change energy storage heat exchanger, a portion of the structure is selected as a basic phase change energy storage heat exchanger unit. The initial dimensional parameters of this selected basic phase change energy storage heat exchanger unit are determined based on the minimum feasible manufacturing process. Selecting a specific phase change energy storage heat exchanger unit with smaller initial dimensional parameters ensures the accuracy of subsequent simulation calculations, reduces simulation time and computational resource consumption, improves the efficiency of simulation design, and clarifies the optimization direction, thus reducing the difficulty of subsequent phase change energy storage heat exchanger optimization and improving the overall efficiency of the simulation design method.

[0065] Then, the initial length parameters of the basic phase change energy storage heat exchanger unit input by the user are received. These initial length parameters can be input before executing S3, or they can be input simultaneously when the user inputs the design target parameter set during S1. In S1, the initial length parameters of the basic phase change energy storage heat exchanger unit are received. In some embodiments, the initial length parameters of the basic phase change energy storage heat exchanger unit do not exceed 70% of the maximum external dimensions of the phase change energy storage heat exchanger. The initial quantity parameters of the basic phase change energy storage heat exchanger unit are calculated based on these initial length parameters, and simulation calculations are performed on the basic phase change energy storage heat exchanger unit to obtain initial simulation results.

[0066] Subsequently, based on the initial quantity parameters of the basic phase change energy storage heat exchanger units, the initial simulation results, and the maximum external dimensions of the phase change energy storage heat exchanger, multiple basic phase change energy storage heat exchanger units are spatially arranged to form the preliminary design configuration of the phase change energy storage heat exchanger. When spatially arranging multiple basic phase change energy storage heat exchanger units, the stored external structures of the phase change energy storage heat exchanger are generated by default, such as regular structures like cuboids, cubes, and polyhedra, or irregular polyhedral structures. If the user sets an external structure for a phase change energy storage heat exchanger that is not pre-stored, a new external structure design can be added according to the user's requirements. (Reference) Figure 10 The diagram shows a regular structure 2100 such as a polyhedron.

[0067] Finally, based on the initial design configuration of the phase change energy storage heat exchanger, it is determined whether the target requirements parameters in the design target parameter set are met. In some implementations, it is determined whether the target energy-to-weight ratio is met. And the target flow resistance Δpre. If the target requirements are met, the initial design configuration of the phase change energy storage heat exchanger is considered to meet the requirements, and a design scheme is output. If the target requirements are not met, the initial design configuration of the phase change energy storage heat exchanger is considered to not meet the requirements, and the initial design configuration of the phase change energy storage heat exchanger is iteratively optimized until the optimized design configuration of the phase change energy storage heat exchanger meets the target requirements, and the final design scheme is output. By setting the target requirements, it is possible to ensure that the output design scheme meets the requirements, and by designing an iterative design method, iterative optimization can be performed even if the initial design configuration of the phase change energy storage heat exchanger does not meet the target requirements, thereby ensuring that the output final design scheme meets the requirements.

[0068] The simulation design method for phase change energy storage heat exchangers provided in this invention allows users to input various design parameters and automatically and intelligently output the final design scheme of the phase change energy storage heat exchanger. When the operating conditions change, by modifying the design parameters, a new final design scheme for the phase change energy storage heat exchanger can be obtained quickly, accurately, and efficiently, thereby improving the design efficiency of the phase change energy storage heat exchanger and reducing the design cost.

[0069] In some specific embodiments of this application, the target requirement parameters include the target energy-to-weight ratio and the target flow resistance. The step of determining whether the target requirement parameters in the design target parameter set are met based on the initial design configuration of the phase change energy storage heat exchanger includes the following steps:

[0070] Based on the initial design configuration of the phase change energy storage heat exchanger, determine whether the estimated energy-to-mass ratio of the initial design configuration of the phase change energy storage heat exchanger is not less than the target energy-to-mass ratio, and whether the estimated flow resistance is not higher than the target flow resistance.

[0071] In this embodiment, the estimated energy-to-weight ratio (EGR) and estimated flow resistance are obtained based on the initial design configuration of the phase change energy storage heat exchanger. The estimated EGR is compared with the target EGR, and the estimated flow resistance is compared with the target flow resistance to determine whether the estimated EGR is not less than the target EGR and the estimated flow resistance is not higher than the target flow resistance. If the estimated EGR is not less than the target EGR and the estimated flow resistance is not higher than the target flow resistance, then the initial design configuration of the phase change energy storage heat exchanger is deemed to meet the requirements. If the estimated EGR is less than the target EGR and / or the estimated flow resistance is higher than the target flow resistance, then the initial design configuration of the phase change energy storage heat exchanger is deemed not to meet the requirements and further iterative optimization is needed.

[0072] In some specific embodiments of this application, the design target parameter set includes a target outlet temperature value. The iterative optimization of the initial design configuration of the phase change energy storage heat exchanger until the design configuration of the phase change energy storage heat exchanger meets the target requirement parameters, and the final design scheme is output, includes the following steps:

[0073] S51. Using the initial size parameters and / or quantity parameters of the basic phase change energy storage heat exchanger unit as optimization variables, the target outlet temperature value and the target flow resistance as constraints, and maximizing the energy-to-mass ratio and / or the phase change rate of the phase change material of the basic phase change energy storage heat exchanger unit as optimization objectives, perform multi-objective optimization.

[0074] S52. Substitute the optimized variables into S3 and S4, and perform S5 for re-evaluation. When the estimated energy-to-mass ratio of the phase change energy storage heat exchanger design configuration after iterative optimization is not less than the target energy-to-mass ratio, and the estimated flow resistance is not higher than the target flow resistance, output the final design scheme.

[0075] When it is determined that the initial design configuration of the phase change energy storage heat exchanger does not meet the requirements, the initial design configuration of the phase change energy storage heat exchanger is iteratively optimized.

[0076] Multi-objective optimization is performed using the initial dimensional parameters and / or values ​​of the basic phase change energy storage heat exchanger unit as optimization variables, the target outlet temperature and target flow resistance as constraints, and maximizing the energy-to-mass ratio and / or the phase change rate of the phase change material in the basic phase change energy storage heat exchanger unit as optimization objectives. The initial dimensional parameters of the basic phase change energy storage heat exchanger unit are determined based on the overall and / or individual component dimensional parameters of the basic phase change energy storage heat exchanger unit, such as the length, width, height, fin height, fin thickness, fin pitch, and baffle thickness of the basic phase change energy storage heat exchanger unit. In some embodiments, multi-objective optimization is performed using an optimization algorithm based on sequential quadratic programming.

[0077] After optimization, the optimized variables are substituted into S3 for simulation calculation, and then substituted into S4 to obtain the design configuration of the phase change energy storage heat exchanger. After completing S3 and S4, the variables are substituted into S5 for re-evaluation. If the estimated energy-to-mass ratio of the iteratively optimized phase change energy storage heat exchanger design configuration is not less than the target energy-to-mass ratio, and the estimated flow resistance is not higher than the target flow resistance, the iteratively optimized phase change energy storage heat exchanger design configuration is deemed to meet the requirements, and the final design scheme is output.

[0078] If the estimated energy-to-mass ratio of the phase change energy storage heat exchanger design configuration after iterative optimization is still less than the target energy-to-mass ratio, and / or the estimated flow resistance is higher than the target flow resistance, it is determined that the design configuration of the phase change energy storage heat exchanger after iterative optimization still does not meet the requirements. Then, S51 and S52 are executed again for the next iteration optimization until the generated design configuration of the phase change energy storage heat exchanger meets the requirements, and then the final design scheme is output.

[0079] In some specific embodiments of this application, the step of extracting a basic phase change energy storage heat exchanger unit based on the structural type of the target phase change energy storage heat exchanger includes the following steps:

[0080] Based on a plate-fin phase change energy storage heat exchanger, a region containing a complete layer of phase change material and its adjacent fluid channels is selected as the basic phase change energy storage heat exchanger unit; or

[0081] Based on the capillary phase change energy storage heat exchanger, a portion containing a single sensing tube and the surrounding phase change material is selected as the basic phase change energy storage heat exchanger unit.

[0082] refer to Figures 2-6 The diagram shows a schematic of a plate-fin phase change energy storage heat exchanger. Figure 2 and Figure 3 The phase change energy storage heat exchanger unit 1000 is shown. Figure 4 and Figure 5 The phase change energy storage heat exchanger core 2000 formed by the phase change energy storage heat exchanger unit 1000 is shown. Figure 6 A phase change energy storage heat exchanger formed by a phase change energy storage heat exchanger core 2000 is shown.

[0083] refer to Figure 2 and Figure 3The phase change energy storage heat exchanger unit 1000 includes: a phase change layer, the phase change layer including a phase change material 11 and phase change material fins 12 disposed in the phase change material 11; a partition assembly, the partition assembly including a first partition 21 and a second partition 22, the first partition 21 being disposed in close contact with one side of the phase change layer, and the second partition 22 being disposed in close contact with the other side of the phase change layer; and a working fluid assembly, the working fluid assembly including a first working fluid layer and a second working fluid layer, the first working fluid layer being disposed in close contact with the side of the first partition 21 away from the phase change layer, and the second working fluid layer being disposed in close contact with the side of the second partition 22 away from the phase change layer, the first working fluid layer including a first working fluid channel 31 and a first working fluid fin 32 disposed in the first working fluid channel 31, and the second working fluid layer including a second working fluid channel 33 and a second working fluid fin 34 disposed in the second working fluid channel 33.

[0084] refer to Figure 4 and Figure 5 The phase change energy storage heat exchanger single core 2000 includes: a plurality of phase change energy storage heat exchanger units 1000 as described in any of the preceding embodiments, extending along a first direction and a second direction, the first direction and the second direction being perpendicular to each other; a cover plate assembly, the cover plate assembly including a first cover plate 111 and a second cover plate 112, the first cover plate 111 being closely attached to the upper side of the topmost phase change energy storage heat exchanger unit 1000, and the first cover plate 111 being closely attached to the lower side of the bottommost phase change energy storage heat exchanger unit 1000; and a phase change seal 121 and a working fluid seal 122, the phase change seal 121 being attached to the phase change layer, and the working fluid seal 122 being attached to the working fluid assembly.

[0085] refer to Figure 6 The phase change energy storage heat exchanger includes: a single core 2000 of the phase change energy storage heat exchanger as described in the above embodiment; and a head unit, the head unit including a first head assembly and a second head assembly, the first head assembly being disposed on one side of the single core 2000 of the phase change energy storage heat exchanger, and the second head assembly being disposed on the other side of the single core 2000 of the phase change energy storage heat exchanger.

[0086] In this embodiment, based on the plate-fin phase change energy storage heat exchanger, a basic phase change energy storage heat exchanger unit is selected, which includes a phase change layer of full height, a first partition 21 and a second partition 22 above and below the phase change layer, a first working fluid layer disposed above the first partition 21, and a second working fluid layer disposed below the second partition 22 (or half of the first working fluid layer and half of the second working fluid layer).

[0087] refer to Figures 7-9 The diagram shows a capillary phase change energy storage heat exchanger.

[0088] refer to Figures 7-9 The phase change energy storage heat exchanger includes: a main body 310, which is filled with a phase change material 110; a working fluid pipeline array, which includes a plurality of working fluid pipelines 210 and at least one fixing plate 220, the fixing plate 220 being fixed inside the main body 310 and the working fluid pipelines 210 passing through the fixing plate 220; and end cap assemblies, which are respectively disposed on both sides of the main body 310 and connected to the working fluid pipelines 210.

[0089] In this embodiment, based on the capillary phase change energy storage heat exchanger, a portion (e.g., one-sixth of the single working fluid pipe 210) and its surrounding phase change material 110 are taken as the basic phase change energy storage heat exchanger unit.

[0090] In some specific embodiments of this application, the simulation calculation of the basic phase change energy storage heat exchanger unit includes the following steps:

[0091] The UDF function is called to perform simulation calculations on the basic phase change energy storage heat exchanger unit. The UDF function is configured to dynamically set the outlet temperature value of the basic phase change energy storage heat exchanger unit calculated at the current time step, combined with the preset or calculated inlet and outlet temperature difference value, as the inlet temperature condition for the next time step during the transient simulation.

[0092] In this embodiment, Ansys Fluent is invoked. Ansys Fluent is a general-purpose computational fluid dynamics (CFD) software used to simulate physical phenomena such as fluid flow, heat transfer, and chemical reactions. After invoking Ansys Fluent, a User-Defined Function (UDF) is written. During simulation calculations, the written UDF is called to perform simulation calculations on the basic phase change energy storage heat exchanger unit, obtaining initial simulation results. Specifically, when executing the UDF, the outlet temperature value of the basic phase change energy storage heat exchanger unit calculated at the current time step is combined with the inlet and outlet temperature difference to calculate the inlet temperature condition for the next time step, i.e., the inlet temperature value for the next time step. Using the written UDF, under the determined initial quantity parameters of the basic phase change energy storage heat exchanger unit, the total heat storage Q is calculated. s It meets the requirements, and there is no need to consider the total heat storage Q in subsequent optimizations. s This condition reduces optimization constraints and objectives, thereby improving optimization efficiency.

[0093] In some specific embodiments of this application, after the step of spatially arranging the plurality of basic phase change energy storage heat exchanger units to form a preliminary design configuration of the phase change energy storage heat exchanger, the following steps are also included:

[0094] Based on the preliminary design configuration of the phase change energy storage heat exchanger, the estimated total weight of the phase change energy storage heat exchanger is calculated.

[0095] The process of determining whether the initial design configuration of the phase change energy storage heat exchanger meets the target requirement parameters in the design target parameter set includes the following steps:

[0096] Based on the initial design configuration and estimated total weight of the phase change energy storage heat exchanger, determine whether it meets the target requirement parameters in the design target parameter set.

[0097] After the preliminary design configuration of the phase change energy storage heat exchanger is formed, the estimated total weight of the phase change energy storage heat exchanger is calculated based on the preliminary design configuration.

[0098] During the evaluation process, based on the initial design configuration and estimated total weight of the phase change energy storage heat exchanger, it is determined whether the target requirements parameters in the design target parameter set are met.

[0099] First, the total weight of the phase change energy storage heat exchanger is estimated based on the preliminary design configuration. Then, the estimated total weight of the phase change energy storage heat exchanger is used for evaluation and judgment, which can improve the accuracy of the evaluation and judgment.

[0100] In some specific embodiments of this application, calculating the estimated total weight of the phase change energy storage heat exchanger based on its preliminary design configuration includes the following steps:

[0101] Determine the structural form of the head assembly that matches the initial design configuration of the phase change energy storage heat exchanger;

[0102] Based on the weight of the phase change energy storage heat exchanger core corresponding to the phase change energy storage heat exchanger, the weight of the head assembly is estimated according to a preset ratio.

[0103] The estimated total weight of the phase change energy storage heat exchanger is obtained by adding the weight of the phase change energy storage heat exchanger core and the weight of the head assembly.

[0104] After establishing the initial design configuration of the phase change energy storage heat exchanger, the matching head assembly structure is determined based on this initial design configuration. In some embodiments, the head assembly structure is a tile-type head assembly, as referenced... Figure 11 and Figure 12 , Figure 11A schematic diagram of the first type of tile-shaped head assembly 3100 is shown. Figure 12 A schematic diagram of the second type of tile-shaped head assembly 3200 is shown.

[0105] After determining the structural form of the head assembly, the weight of the head assembly is estimated based on the weight of the phase change energy storage heat exchanger core, according to a preset proportional relationship. This preset proportion can be set based on user experience or can be pre-generated with default parameters. For example, the estimated weight of a single head assembly is 5%-6% of the weight of the phase change energy storage heat exchanger core. Since head assemblies are installed on both sides of the phase change energy storage heat exchanger, the overall weight of the head assembly is estimated to be 10%-12% of the weight of the phase change energy storage heat exchanger core.

[0106] After estimating the weight of the head assembly, the total weight of the phase change energy storage heat exchanger is obtained by adding the weight of the phase change energy storage heat exchanger core and the weight of the head assembly.

[0107] Regarding S3 above, the simulation calculation process is described in detail here in conjunction with the above implementation method:

[0108] Input the length L of at least one basic phase change energy storage heat exchanger unit. bhu (This value should not exceed the maximum external dimension L of the phase change energy storage heat exchanger) max 70% of the data is used to generate the structural digital model of the basic phase change energy storage heat exchanger unit. Then, the following steps are performed:

[0109] ① Based on the width W of the basic phase change energy storage heat exchanger unit bhu The fin height H of the phase change material layer pcfin and fin thickness T pcfin The cross-sectional area A of the phase change material in the basic phase change energy storage heat exchanger unit is calculated using the following formula (1). cpc :

[0110]

[0111] ② Based on the length L of the basic phase change energy storage heat exchanger unit bhu Assuming the total heat storage Q s Both are due to the latent heat of phase change Q lh If provided, the initial number N of basic phase change energy storage heat exchanger units can be obtained through the following formula (2):

[0112]

[0113] in, L represents the density of a phase change material. H This indicates the specific latent heat of a phase change material. This represents the phase transition rate, which can be taken as 0.7 in this case.

[0114] ③ Verify that the calculated N value is correct. Without considering the length, what is the width (W) of the plate-fin phase change heat exchanger? max ) and high (H) max There is a maximum size limit. Arrange the layers in a stacking manner and determine the maximum number of layers, i.e., m. max =H max / H bhu And how many basic simulation units are arranged in each layer, i.e., n max =W max / W bhu m max *n max If the input value is greater than or equal to N, proceed to step ④. If the condition is not met, it indicates that the length L of the input basic phase change energy storage heat exchanger unit is not met. bhu Unable to meet the total heat storage Q s Indicators, re-enter the length L of the basic phase change energy storage heat exchanger unit. bhu .

[0115] ④ Based on the width W of the basic phase change energy storage heat exchanger unit bhu The fin height H of the fluid layer ffin and fin thickness T ffin The total cross-sectional area A of the fluid working fluid layer of the basic phase change energy storage heat exchanger unit is calculated using the following formula (3). cf .

[0116]

[0117] ⑤ Calculate the inlet velocity of the basic simulation unit using the following formula (4). The inlet velocity of the basic simulation unit is the ratio of the total volumetric flow rate to the number of basic phase change energy storage heat exchanger units and the flow cross-sectional area.

[0118]

[0119] ⑥ Based on the total heat storage Q s The average thermal storage power is calculated from the thermal storage time t. The inlet and outlet temperature difference at each moment during the simulation calculation is obtained from the total mass flow rate and the average thermal storage power using the following formula (5).

[0120]

[0121] Among them, c, V f These represent the specific heat capacity, density, and volumetric flow rate of the working fluid, respectively, and ΔT represents the temperature difference between the inlet and outlet.

[0122] ⑦ Perform simulation using Ansys Fluent, importing the generated basic phase change energy storage heat exchanger unit into Fluent; write a UDF function to extract the outlet temperature value T obtained at each time step. out,t1 + The inlet and outlet temperature difference ΔT is used as the inlet temperature T for calculating the next time step. in, t2 The data is used for simulation calculations.

[0123] ⑧. Determine whether the final outlet temperature value after simulation calculation meets the design specifications of the phase change energy storage heat exchanger, i.e., T. out,fm ≤T reout If not satisfied, re-enter L. bhu Alternatively, other initial size parameters may be manually modified.

[0124] ⑨ Finally, output an initial phase change energy storage heat exchanger unit model (including all initial size parameters), the number N of basic phase change energy storage heat exchanger units, and the initial simulation results.

[0125] Regarding S4 above, and in conjunction with the above implementation method, the spatial arrangement process is described in detail below:

[0126] Based on the initial phase change energy storage heat exchanger unit model, the number N of basic phase change energy storage heat exchanger units, the initial simulation results, and the maximum external dimensions of the phase change energy storage heat exchanger output by S3, the N basic phase change energy storage heat exchanger units are arranged in space during the spatial arrangement process, which is also a preliminary overall design of the phase change energy storage heat exchanger core.

[0127] ① The basic phase change energy storage heat exchanger unit can be arranged in various ways, resulting in diverse forms of the phase change energy storage heat exchanger core. Input the approximate external shape and structure, such as... Figures 2-6 The cuboid structure shown can also be... Figure 10 The polyhedral and other regular structures shown are 2100.

[0128] ② Considering the expansion of the phase change material, the actual length L of the plate-fin phase change energy storage heat exchanger core is... cb The length L of the basic phase change energy storage heat exchanger unit should be... bhu It is about 1.1 times that.

[0129] ③ Calculate the minimum total volume V of the core using the following formula (6). xinmin .

[0130]

[0131] ④ Arrange the basic phase change energy storage heat exchanger units to ensure that the number of layers m ≤ m max ; and the number of basic phase change energy storage heat exchanger units arranged on each floor, n≤n maxWhen arranging the components, follow the principle of m * the number of basic phase change energy storage heat exchanger units per layer, n ≥ N, where n is the volume of the phase change energy storage heat exchanger core, V. xin ≥V xinmin Then confirm the mass m of the phase change energy storage heat exchanger core. xin .

[0132] ⑤ The end cap assembly defaults to a tile-type end cap assembly with an internal flow equalization plate. This plate is used to distribute the fluid working medium after it enters the phase change energy storage heat exchanger and to converge the fluid before it exits the heat exchanger, ensuring uniform distribution of the fluid flow rate within each basic phase change energy storage heat exchanger unit. The width and height of the end cap assembly are identical to those of the phase change energy storage heat exchanger core, with a length limited to 100mm. Both the end cap assembly and the phase change energy storage heat exchanger core are made of aluminum alloy for easy welding and sealing. Generally, the weight of a single end cap assembly can be estimated as 5%-6% of the weight of the phase change energy storage heat exchanger core, used to calculate the total weight (m) of the phase change energy storage heat exchanger. tot If the head assembly adopts a new form defined by the user, and the method is not preset, it is necessary to supplement the structural shape of the newly designed head assembly, and additionally supplement the preset weight ratio of the new head assembly to the phase change energy storage heat exchanger core.

[0133] ⑥ The final output includes the structural model (outer shape) of the phase change energy storage heat exchanger core, the initial dimensional parameters of the structure, and the structure, volume, and weight of the head assembly.

[0134] Regarding S5 above, the evaluation and iterative optimization process is described in detail here in conjunction with the above implementation method:

[0135] Based on the structural model (outline), initial dimensional parameters, structure, volume, and weight of the phase change energy storage heat exchanger core output by S4, the energy-to-mass ratio is determined. The flow resistance Δp is evaluated.

[0136] ① Calculate the energy-mass ratio using the following formula (7). :

[0137]

[0138] like ≥ This indicates that the model can meet the energy-to-mass ratio requirements.

[0139] ② Calculate the flow resistance Δp:

[0140] The flow resistance calculation only involves the working fluid side, including the local sudden expansion flow resistance △p1 from the inlet nozzle to the head, the local sudden contraction flow resistance △p2 from the head assembly to the inlet of the phase change energy storage heat exchanger core, and the friction resistance △p of the phase change energy storage heat exchanger core. xinThe local sudden expansion flow resistance Δp3 from the outlet of the phase change energy storage heat exchanger core to the head assembly, and the local sudden contraction flow resistance Δp4 from the head assembly to the outlet pipe.

[0141] Core portion flow resistance Δp xin Calculated by executing S3.

[0142] The expansion coefficient from the inlet nozzle to the head assembly is calculated using the following formula (8). :

[0143]

[0144] The local sudden expansion resistance Δp1 from the inlet nozzle to the head assembly is calculated using the following formula (9).

[0145]

[0146] The abrupt contraction coefficient from the head assembly to the inlet of the phase change energy storage heat exchanger core is calculated using the following formula (10). :

[0147]

[0148] The local abrupt flow resistance Δp2 from the head assembly to the inlet of the phase change energy storage heat exchanger core is calculated using the following formula (11):

[0149]

[0150] At the outlet, there is a localized sudden expansion flow resistance from the outlet of the phase change energy storage heat exchanger core to the head assembly, and a localized sudden contraction flow resistance from the head assembly to the outlet nozzle. The calculation formula is the same as that at the inlet.

[0151] The flow resistance Δp is calculated using the following formula (12).

[0152]

[0153] If the flow resistance Δp ≤ Δp re This indicates that the model can meet the flow resistance requirements.

[0154] If the quality ratio If both the flow resistance Δp and the total input requirements are met, then the output will include the initial dimensional parameters of the basic phase change energy storage heat exchanger unit structure; the number of basic phase change energy storage heat exchanger units; the dimensions, volume, and weight parameters of the phase change energy storage heat exchanger core; and the dimensions, volume, and weight parameters of the head assembly.

[0155] If the quality ratio If either the flow resistance Δp or the flow rate does not meet the requirements, an iterative optimization process is performed.

[0156] During the iterative optimization process, the SNOPT method is used for multi-objective optimization. Specifically:

[0157] Optimized control parameters: initial dimensional parameters (L) of the basic phase change energy storage heat exchanger unit structure bhu W max H bhu H pcfin T pcfin H ffin T ffin ), starting with the minimum process parameters for optimization; and the number N of basic phase change energy storage heat exchanger units.

[0158] Optimization design constraints: Outlet temperature value T out,fm ≤T reout Flow resistance Δp ≤ Δp re .

[0159] The above structural design parameter range satisfies the following objective function:

[0160] Optimization objective: ① Phase change rate of the phase change material Maximum; ② Energy-to-mass ratio maximum.

[0161] Maximizing the phase change rate of phase change materials:

[0162]

[0163] Maximizing the energy-to-mass ratio:

[0164]

[0165] After completing the iterative optimization, all data were evaluated again, including the energy-to-weight ratio. After the flow resistance Δp meets the input requirements, the final output is as follows: the initial dimensional parameters of each element of the optimized basic phase change energy storage heat exchanger unit structure; the number of basic phase change energy storage heat exchanger units; the dimensions, volume, and weight parameters of the phase change energy storage heat exchanger unit core; and the dimensions, volume, and weight parameters of the head assembly. If the evaluation results consistently fail to meet the standards, it may be due to errors in the input data or unreasonable initial values ​​set during the simulation calculation. In such cases, the user needs to make an accurate judgment, adjust the parameters, and re-execute the steps.

[0166] Here is an example:

[0167] The input working fluid volumetric flow rate is 16 L / min, the total heat storage is 2000 kJ, the outlet temperature is ≤282.15 K; the energy-to-mass ratio is ≥70 kJ / kg, the flow resistance is ≤7 kPa, and the phase change energy storage heat exchanger has a relatively small size.

[0168] When selecting a plate-fin phase change energy storage heat exchanger, the minimum parameters for the fins to meet the processing requirements are as follows: fin thickness of 0.15 mm, fin height of 1.5 mm, and fin pitch of 2.5 mm.

[0169] The data from executing S3 and S4 are as follows:

[0170]

[0171] After iterative optimization, the data is as follows:

[0172]

[0173] refer to Figure 13 This invention provides a simulation design device for a phase change energy storage heat exchanger, comprising:

[0174] The parameter set generation module 100 is used to receive a design target parameter set input by the user, the design target parameter set including the maximum external dimensions of the phase change energy storage heat exchanger;

[0175] The basic unit extraction module 200 is used to extract basic phase change energy storage heat exchanger units based on the structural type of the phase change energy storage heat exchanger. The initial size parameters of the basic phase change energy storage heat exchanger units are determined based on the minimum achievable processing technology.

[0176] The simulation calculation module 300 is used to receive the initial length parameter of the basic phase change energy storage heat exchanger unit input by the user, calculate the initial quantity parameter of the basic phase change energy storage heat exchanger unit, and perform simulation calculation on the basic phase change energy storage heat exchanger unit to obtain the initial simulation results.

[0177] The layout design module 400 is used to spatially arrange multiple basic phase change energy storage heat exchanger units according to the initial quantity parameters of the basic phase change energy storage heat exchanger units, the initial simulation results, and the maximum external dimensions of the phase change energy storage heat exchanger to form a preliminary design configuration of the phase change energy storage heat exchanger.

[0178] The scheme output module 500 is used to determine whether the initial design configuration of the phase change energy storage heat exchanger meets the target requirement parameters in the design target parameter set. If yes, it outputs the design scheme; if no, it iteratively optimizes the initial design configuration of the phase change energy storage heat exchanger until the design configuration of the phase change energy storage heat exchanger meets the target requirement parameters, and outputs the final design scheme.

[0179] In some specific embodiments of this application, the target requirement parameters include the target energy-to-mass ratio and the target flow resistance, and the scheme output module 500 includes:

[0180] The evaluation submodule is used to determine, based on the initial design configuration of the phase change energy storage heat exchanger, whether the estimated energy-to-mass ratio of the initial design configuration of the phase change energy storage heat exchanger is not less than the target energy-to-mass ratio, and whether the estimated flow resistance is not higher than the target flow resistance.

[0181] In some specific embodiments of this application, the design target parameter set includes a target outlet temperature value, and the scheme output module 500 includes:

[0182] The iterative optimization submodule is used to perform multi-objective optimization with the initial size parameters and / or quantity parameters of the basic phase change energy storage heat exchanger unit as optimization variables, the target outlet temperature value and the target flow resistance as constraints, and maximizing the energy-to-mass ratio and / or the phase change rate of the phase change material of the basic phase change energy storage heat exchanger unit as optimization objectives.

[0183] The re-evaluation submodule is used to substitute the optimized variables into the simulation calculation module 300 and the layout design module 400, and execute the scheme output module 500 for re-evaluation. When the estimated energy-to-mass ratio of the iteratively optimized phase change energy storage heat exchanger design configuration is not less than the target energy-to-mass ratio, and the estimated flow resistance is not higher than the target flow resistance, the final design scheme is output.

[0184] In some specific embodiments of this application, the basic unit extraction module 200 includes:

[0185] A plate-fin type interception submodule is used to intercept a region containing a complete phase change material layer and its adjacent fluid channels as the basic phase change heat exchanger unit, based on a plate-fin type phase change energy storage heat exchanger; or

[0186] A capillary-type interception submodule is used to intercept a portion of a single sensing tube and the surrounding phase change material as the basic phase change energy storage heat exchanger unit based on a capillary-type phase change energy storage heat exchanger.

[0187] In some specific embodiments of this application, the simulation calculation module 300 includes:

[0188] The UDF function call submodule is used to call the UDF function to perform simulation calculations on the basic phase change energy storage heat exchanger unit. The UDF function is configured to dynamically set the outlet temperature value of the basic phase change energy storage heat exchanger unit calculated at the current time step, combined with the preset or calculated inlet and outlet temperature difference value, as the inlet temperature condition for the next time step during transient simulation.

[0189] In some specific embodiments of this application, the layout design module 400 includes:

[0190] The estimated total weight calculation submodule is used to calculate the estimated total weight of the phase change energy storage heat exchanger based on the preliminary design configuration of the phase change energy storage heat exchanger.

[0191] The solution output module 500 includes:

[0192] The demand judgment submodule is used to determine whether the target demand parameters in the design target parameter set are met based on the initial design configuration and estimated total weight of the phase change energy storage heat exchanger.

[0193] In some specific embodiments of this application, the estimated total weight calculation submodule includes:

[0194] The head assembly structure form determination submodule is used to determine the head assembly structure form that matches the initial design configuration of the phase change energy storage heat exchanger;

[0195] The weight estimation submodule is used to estimate the weight of the head assembly based on the weight of the phase change energy storage heat exchanger core corresponding to the phase change energy storage heat exchanger, according to a preset ratio.

[0196] The weight addition submodule is used to add the weight of the phase change energy storage heat exchanger core and the weight of the head assembly to obtain the estimated total weight of the phase change energy storage heat exchanger.

[0197] The specific implementation method of the simulation design device for phase change energy storage heat exchangers can be referred to the above-mentioned simulation design method for phase change energy storage heat exchangers, and will not be repeated here.

[0198] This invention provides a computer device including a processor, which executes a computer program stored in a memory to implement the steps of the simulation design method described above.

[0199] The present invention also provides a computer-readable storage medium having a computer program (instructions) stored thereon, which, when executed by a processor, implements the steps of the simulation design method described above.

[0200] For example, a computer program can be divided into one or more modules, one or more of which are stored in memory and executed by a processor to perform the present invention. One or more modules can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in a computer device. For example, the computer program can be divided into the steps of the simulation design methods provided in the above-described method embodiments.

[0201] Those skilled in the art will understand that the above description of the computer device is merely an example and does not constitute a limitation on the computer device. It may include more or fewer components than described above, or combine certain components, or different components, such as input / output devices, network access devices, buses, etc.

[0202] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the computer device, connecting various parts of the computer device via various interfaces and lines.

[0203] The memory can be used to store the computer programs and / or modules. The processor implements various functions of the computer device by running or executing the computer programs and / or modules stored in the memory and by calling data stored in the memory. The memory may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as interface display function, interface interaction function, etc.), etc.; the data storage area may store data created according to the use of the mobile phone (such as map interface, selection interface, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0204] If the modules / units integrated into the computer device are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, an electrical signal, and a software distribution medium, etc.

[0205] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A simulation design method of a phase change thermal energy storage heat exchanger, characterized in that, Includes the following steps: S1. Receive the design target parameter set input by the user, the design target parameter set including the maximum external dimensions of the phase change energy storage heat exchanger; S2. Based on the structural type of the phase change energy storage heat exchanger, a basic phase change energy storage heat exchanger unit is extracted, and the initial size parameters of the basic phase change energy storage heat exchanger unit are determined based on the minimum achievable processing technology. S3. Receive the initial length parameter of the basic phase change energy storage heat exchanger unit input by the user, calculate the initial quantity parameter of the basic phase change energy storage heat exchanger unit, and perform simulation calculation on the basic phase change energy storage heat exchanger unit to obtain the initial simulation results. S4. Based on the initial quantity parameters of the basic phase change energy storage heat exchanger units, the initial simulation results, and the maximum external dimensions of the phase change energy storage heat exchanger, arrange multiple basic phase change energy storage heat exchanger units in space to form the initial design configuration of the phase change energy storage heat exchanger. S5. Based on the initial design configuration of the phase change energy storage heat exchanger, determine whether it meets the target requirement parameters in the design target parameter set. If yes, output the design scheme. If no, iteratively optimize the initial design configuration of the phase change energy storage heat exchanger until the design configuration of the phase change energy storage heat exchanger meets the target requirement parameters, and output the final design scheme. The target requirement parameters include the target energy-to-weight ratio and the target flow resistance. The process of determining whether the target requirement parameters in the design target parameter set are met based on the initial design configuration of the phase change energy storage heat exchanger includes the following steps: Based on the initial design configuration of the phase change energy storage heat exchanger, determine whether the estimated energy-to-mass ratio of the initial design configuration of the phase change energy storage heat exchanger is not less than the target energy-to-mass ratio, and whether the estimated flow resistance is not higher than the target flow resistance; The design target parameter set includes the target outlet temperature value. The iterative optimization of the initial design configuration of the phase change energy storage heat exchanger until the design configuration of the phase change energy storage heat exchanger meets the target requirements parameters, and the final design scheme is output, includes the following steps: S51. Using the initial size parameters and / or quantity parameters of the basic phase change energy storage heat exchanger unit as optimization variables, the target outlet temperature value and the target flow resistance as constraints, and maximizing the energy-to-mass ratio and / or the phase change rate of the phase change material of the basic phase change energy storage heat exchanger unit as optimization objectives, perform multi-objective optimization. S52. Substitute the optimized variables into S3 and S4, and perform S5 for re-evaluation. When the estimated energy-to-mass ratio of the phase change energy storage heat exchanger design configuration after iterative optimization is not less than the target energy-to-mass ratio, and the estimated flow resistance is not higher than the target flow resistance, output the final design scheme.

2. The method of claim 1, wherein, Based on the structural type of the target phase change energy storage heat exchanger, the basic phase change energy storage heat exchanger unit is extracted, including the following steps: Based on a plate-fin phase change energy storage heat exchanger, a region containing a complete phase change material layer and its adjacent fluid channels is selected as the basic phase change energy storage heat exchanger unit; or Based on the capillary phase change energy storage heat exchanger, a portion containing a single sensing tube and the surrounding phase change material is selected as the basic phase change energy storage heat exchanger unit.

3. The method of claim 1, wherein, The simulation calculation of the basic phase change energy storage heat exchanger unit includes the following steps: The UDF function is called to perform simulation calculations on the basic phase change energy storage heat exchanger unit. The UDF function is configured to dynamically set the outlet temperature value of the basic phase change energy storage heat exchanger unit calculated at the current time step, combined with the preset or calculated inlet and outlet temperature difference value, as the inlet temperature condition for the next time step during the transient simulation.

4. The method of claim 1, wherein, Following the step of spatially arranging the plurality of basic phase change energy storage heat exchanger units to form the initial design configuration of the phase change energy storage heat exchanger, the following steps are also included: Based on the initial design configuration of the phase change energy storage heat exchanger, the estimated total weight of the phase change energy storage heat exchanger is calculated. The process of determining whether the initial design configuration of the phase change energy storage heat exchanger meets the target requirement parameters in the design target parameter set includes the following steps: Based on the initial design configuration and estimated total weight of the phase change energy storage heat exchanger, determine whether it meets the target requirement parameters in the design target parameter set.

5. The method of claim 4, wherein, The step of calculating the estimated total weight of the phase change energy storage heat exchanger based on its initial design configuration includes the following steps: Determine the structural form of the head assembly that matches the initial design configuration of the phase change energy storage heat exchanger; Based on the weight of the phase change energy storage heat exchanger core corresponding to the phase change energy storage heat exchanger, the weight of the head assembly is estimated according to a preset ratio. The estimated total weight of the phase change energy storage heat exchanger is obtained by adding the weight of the phase change energy storage heat exchanger core and the weight of the head assembly.

6. A simulation design device for a phase change energy storage heat exchanger, characterized in that, include: The parameter set generation module is used to receive the design target parameter set input by the user, which includes the maximum external dimensions of the phase change energy storage heat exchanger. The basic unit extraction module is used to extract basic phase change energy storage heat exchanger units based on the structural type of the phase change energy storage heat exchanger. The initial size parameters of the basic phase change energy storage heat exchanger units are determined based on the minimum achievable processing technology. The simulation calculation module is used to receive the initial length parameter of the basic phase change energy storage heat exchanger unit input by the user, calculate the initial quantity parameter of the basic phase change energy storage heat exchanger unit, and perform simulation calculation on the basic phase change energy storage heat exchanger unit to obtain the initial simulation results. The layout design module is used to spatially arrange multiple basic phase change energy storage heat exchanger units according to the initial quantity parameters of the basic phase change energy storage heat exchanger units, the initial simulation results, and the maximum external dimensions of the phase change energy storage heat exchanger to form the initial design configuration of the phase change energy storage heat exchanger. The solution output module is used to determine whether the initial design configuration of the phase change energy storage heat exchanger meets the target requirement parameters in the design target parameter set. If yes, it outputs a design solution; otherwise, it iteratively optimizes the initial design configuration of the phase change energy storage heat exchanger until the design configuration of the phase change energy storage heat exchanger meets the target requirement parameters, and outputs the final design solution. The target requirement parameters include the target energy-to-mass ratio and the target flow resistance, and the solution output module includes: The evaluation submodule is used to determine, based on the initial design configuration of the phase change energy storage heat exchanger, whether the estimated energy-to-mass ratio of the initial design configuration of the phase change energy storage heat exchanger is not less than the target energy-to-mass ratio and the estimated flow resistance is not higher than the target flow resistance. The design target parameter set includes the target outlet temperature value, and the scheme output module includes: The iterative optimization submodule is used to perform multi-objective optimization with the initial size parameters and / or quantity parameters of the basic phase change energy storage heat exchanger unit as optimization variables, the target outlet temperature value and the target flow resistance as constraints, and maximizing the energy-to-mass ratio and / or the phase change rate of the phase change material of the basic phase change energy storage heat exchanger unit as optimization objectives. The re-evaluation submodule is used to substitute the optimized variables into the simulation calculation module and the layout design module, and execute the scheme output module for re-evaluation. When the estimated energy-to-mass ratio of the iteratively optimized phase change energy storage heat exchanger design configuration is not less than the target energy-to-mass ratio, and the estimated flow resistance is not higher than the target flow resistance, the final design scheme is output.

7. A computer device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the simulation design method as described in any one of claims 1 to 5.

8. A memory device, comprising: The storage device stores a computer program that can be executed to implement the steps of the simulation design method as described in any one of claims 1 to 5.

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