Two-stage AMTEC-TRD thermal power generation system and parameter optimization method

Abstract

The invention discloses a two-stage AMTEC-TRD thermal power generation system and a parameter optimization method, particularly relates to the technical field of thermal power generation, and is technically characterized in that the system comprises two-stage AMTEC equipment and TRD equipment, and the two-stage AMTEC equipment is used for receiving heat energy and converting the heat energy into electric energy; the TRD equipment is connected with the two-stage AMTEC equipment and is used for receiving waste heat generated by the two-stage AMTEC equipment and converting the waste heat of the two-stage AMTEC equipment into electric energy; the two-stage AMTEC equipment comprises an evaporator static pressure chamber, a middle static pressure chamber and a condenser static pressure chamber, a first-stage BASE pipe is arranged between the evaporator static pressure chamber and the middle static pressure chamber, and a second-stage BASE pipe is arranged between the middle static pressure chamber and the condenser static pressure chamber.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation, and in particular to a two-stage AMTEC-TRD thermal power generation system and a parameter optimization method. Background Art

[0002] At present, a large amount of high-temperature waste heat generated in industrial production processes is discharged into the environment, causing a large amount of energy waste and environmental pollution. With the growing demand for renewable energy and clean energy, the research on efficient thermoelectric devices has attracted great attention.

[0003] Alkali metal thermoelectric converter (AMTEC) has the characteristics of high energy conversion efficiency (0.2-0.4), solid-state noiseless operation, and excellent durability. On the other hand, since its evaporator temperature is in the range of 900K-1300K, it can be driven by a variety of heat sources: such as nuclear reactors, fuel combustion, and the sun. Therefore, it is suitable for a wide range of applications involving outer space, aerospace, military, and civilian fields. However, the condenser temperature of AMTEC (400-800K) is higher than the ambient temperature. If the waste heat generated by the condenser is directly dissipated into the environment, it will cause energy waste and environmental thermal damage. Therefore, how to improve the performance of AMTEC has become a problem of widespread concern in recent years.

[0004] In the existing technology, some researchers have devoted themselves to improving the efficiency and power output of AMTEC devices. The study found that the maximum efficiency of two-stage AMTEC can reach 0.362, and the maximum power output density can reach 41.2×10 3 W m -2 , which are improved by 17.5% and 40.6% respectively compared with AMTEC alone, but the thermal energy conversion efficiency still does not reach the maximum.

[0005] Therefore, the present invention aims to provide a two-stage AMTEC-TRD thermal power generation system and a parameter optimization method to solve the above-mentioned related problems. Summary of the invention

[0006] The technical problem to be solved by the present invention is that the performance optimization effect of the existing AMTEC equipment is not good, and the conversion performance of the two-stage AMTEC equipment is low. The purpose is to provide a two-stage AMTEC-TRD thermal power generation system and a parameter optimization method, and couple the TRD device with the two-stage AMTEC device to obtain a two-stage AMTEC-TRD thermal power generation system. The waste heat of the two-stage AMTEC device is subjected to energy conversion processing by the TRD device, thereby increasing the utilization rate of thermal energy and reducing energy waste. Through the parameter optimization method provided by the present invention, the system parameters of the two-stage AMTEC-TRD thermal power generation system can be optimized, and a system optimization strategy is provided for the two-stage AMTEC-TRD thermal power generation system to optimize the conversion efficiency of the entire system.

[0007] The present invention is achieved through the following technical solutions:

[0008] A two-stage AMTEC-TRD thermal power generation system includes a two-stage AMTEC device and a TRD device. The two-stage AMTEC device is used to receive thermal energy and convert the thermal energy into electrical energy. The TRD device is connected to the two-stage AMTEC device and is used to receive waste heat generated by the two-stage AMTEC device and convert the waste heat of the two-stage AMTEC device into electrical energy.

[0009] Furthermore, the two-stage AMTEC device includes an evaporator static pressure chamber, an intermediate static pressure chamber and a condenser static pressure chamber. The two-stage AMTEC contains a first-stage BASE tube and a second-stage BASE tube. The first-stage BASE tube is arranged on the inner side of the second-stage BASE tube. The evaporator static pressure chamber and the intermediate static pressure chamber are separated by the first-stage BASE tube, and the intermediate static pressure chamber and the condenser static pressure chamber are separated by the second-stage BASE tube. The first-stage AMTEC contains a first-stage BASE tube, and the second-stage AMTEC contains a second-stage BASE tube.

[0010] The present invention also provides a parameter optimization method for a two-stage AMTEC-TRD thermal power generation system as described in any one of the above, the method comprising:

[0011] The first objective function is established by maximizing the system power output density, and the second objective function is established by maximizing the system output efficiency;

[0012] Obtain system operating parameters, perform thermodynamic analysis on the two-stage AMTEC-TRD thermal power generation system, divide the system operating parameters into independent variable parameters and dependent variable parameters, and construct multiple constraint equations for independent variable parameters and dependent variable parameters;

[0013] Based on multiple constraint equations, the independent variable parameters and the dependent variable parameters are optimized using the first objective function and the second objective function to obtain the optimal parameter optimization interval.

[0014] Furthermore, the system operating parameters are obtained, and the two-stage AMTEC-TRD thermal power generation system is thermodynamically analyzed, and the system operating parameters are divided into independent variable parameters and dependent variable parameters, wherein the independent variable parameters include the current density of the first-stage AMTEC in the two-stage AMTEC device, the thickness of the BASE tube in the second-stage AMTEC in the two-stage AMTEC device, the intermediate temperature of the two-stage AMTEC device, and the voltage of the TRD device; the dependent variable parameters include the current density of the second-stage AMTEC device in the two-stage AMTEC device, the thickness of the BASE tube in the first-stage AMTEC in the two-stage AMTEC device, the condenser temperature of the two-stage AMTEC, the ratio of the area of ​​the TRD device to the area of ​​the BASE tube in the first-stage AMTEC in the two-stage AMTEC device, and the ratio of the area of ​​the BASE tube in the first-stage AMTEC in the two-stage AMTEC device to the area of ​​the BASE tube in the second-stage AMTEC.

[0015] Furthermore, multiple constraint equations of independent variable parameters and dependent variable parameters are constructed, specifically:

[0016]

[0017] Wherein, J1 represents the current density of the first-stage AMTEC in the two-stage AMTEC device; n represents the ratio of the area of ​​the BASE tube in the second-stage AMTEC to the area of ​​the BASE tube in the first-stage AMTEC in the two-stage AMTEC device; J2 represents the current density of the second-stage AMTEC; T H represents the evaporator temperature of the two-stage AMTEC; T in represents the middle temperature of the two-stage AMTEC; M represents the molar mass of sodium; F represents the Faraday constant; L represents the latent heat of vaporization; σ represents the Stefan-Boltzmann constant; z represents the radiation reduction coefficient; P1 represents the power of the first-stage AMTEC; c p represents molar specific heat; P2 represents the power of the second-stage AMTEC; A2 represents the area of ​​the BASE tube in the second-stage AMTEC; T C represents the condenser temperature of the two-stage AMTEC; q l represents the heat loss released to the environment by the two-stage AMTEC; q C represents the heat energy transferred from two-stage AMTEC to TRD; p sat (T) represents the saturated vapor pressure at temperature T; μ represents the characteristic coefficient of BASE tube material; J TR Represents the current density of TRD; V TR Indicates the output voltage of TRD; A TR represents the surface area of ​​TRD; ΔE ph Represents the net radiated photon energy.

[0018] Furthermore, based on multiple constraint equations, the first objective function and the second objective function are used to optimize the independent variable parameters and the dependent variable parameters to obtain the optimal parameter optimization interval, specifically:

[0019] At least one independent variable parameter is selected as the parameter to be optimized, and under the constraint relationship of multiple constraint equations, the objective function value of the parameter to be optimized is calculated using the first objective function and the second objective function, and the parameter optimization interval between the efficiency and the power output density and the parameter to be optimized is constructed.

[0020] The present invention also provides a parameter optimization system for a two-stage AMTEC-TRD thermal power generation system, characterized in that the system is used in any one of the above-mentioned parameter optimization methods for a two-stage AMTEC-TRD thermal power generation system, and the system comprises:

[0021] The first module is used to establish a first objective function with a maximum system power output density and to establish a second objective function with a maximum system output efficiency;

[0022] The second module is used to obtain the system operating parameters and perform thermodynamic analysis on the two-stage AMTEC-TRD thermal power generation system, divide the system operating parameters into independent variable parameters and dependent variable parameters, and construct multiple constraint equations for independent variable parameters and dependent variable parameters;

[0023] The third module is used to optimize the independent variable parameters and the dependent variable parameters based on multiple constraint equations using the first objective function and the second objective function to obtain the optimal parameter optimization interval.

[0024] The present invention also provides a computer device, comprising a system memory and a processor, wherein the system memory stores a computer program, and the processor implements the steps of any one of the above-mentioned methods when executing the computer program.

[0025] The present invention also provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of any one of the methods described above are implemented.

[0026] The present invention also provides a computer program product comprising instructions, and when the instructions are executed by a computer device cluster, the computer device cluster executes any of the above methods.

[0027] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0028] In the present invention, a TRD device is coupled with a two-stage AMTEC device to obtain a two-stage AMTEC-TRD thermal power generation system, and the waste heat of the two-stage AMTEC device is subjected to energy conversion processing by the TRD device, thereby increasing the utilization rate of thermal energy and reducing energy waste; through the parameter optimization method provided by the present invention, the system parameters of the two-stage AMTEC-TRD thermal power generation system can be optimized, and a system optimization strategy is provided for the two-stage AMTEC-TRD thermal power generation system, so as to optimize the conversion efficiency of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0030] Figure 1 This is a schematic diagram of the structure of a two-stage AMTEC-TRD thermal power generation system in this embodiment;

[0031] Figure 2 This is an energy band diagram of a TRD device in a two-stage AMTEC-TRD thermal power generation system in this embodiment;

[0032] Figure 3 This is a schematic diagram of a method flow chart of a parameter optimization method for a two-stage AMTEC-TRD thermal power generation system in this embodiment;

[0033] Figure 4(a)-Figure 4(b) Schematic diagram of parameter optimization interval of a parameter optimization method of a two-stage AMTEC-TRD thermal power generation system in this embodiment;

[0034] Figure 5(a)-Figure 5(h) Schematic diagram of a curve showing changes in system parameters in a parameter optimization method for a two-stage AMTEC-TRD thermal power generation system in this embodiment;

[0035] Figure 6 This is a schematic diagram showing the effect comparison of a parameter optimization method for a two-stage AMTEC-TRD thermal power generation system in this embodiment;

[0036] Figure 7 This is a module schematic diagram of a parameter optimization system for a two-stage AMTEC-TRD thermal power generation system in this embodiment;

[0037] Figure 8 It is a structural schematic diagram of a computer device in this embodiment. DETAILED DESCRIPTION

[0038] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope of the present disclosure. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0039] In the present disclosure, unless otherwise specified, the use of the terms "first", "second", etc. to describe various elements is not intended to limit the positional relationship, timing relationship, or importance relationship of these elements, and such terms are only used to distinguish one element from another element. In some examples, the first element and the second element may refer to the same instance of the element, and in some cases, based on the description of the context, they may also refer to different instances.

[0040] The terms used in the description of various examples in this disclosure are only for the purpose of describing specific examples and are not intended to be limiting. Unless the context clearly indicates otherwise, if the number of elements is not specifically limited, the element can be one or more. In addition, the term "and / or" used in this disclosure covers any one of the listed items and all possible combinations.

[0041] Example 1

[0042] See also Figure 1 , Figure 1 A structural schematic diagram of a two-stage AMTEC-TRD thermal power generation system is shown, wherein the system includes a two-stage AMTEC device and a TRD device, the two-stage AMTEC device is used to receive thermal energy and convert the thermal energy into electrical energy; the TRD device is connected to the two-stage AMTEC device, and is used to receive waste heat generated by the two-stage AMTEC device and convert the waste heat of the two-stage AMTEC device into electrical energy.

[0043] Furthermore, the two-stage AMTEC device includes an evaporator static pressure chamber, an intermediate static pressure chamber and a condenser static pressure chamber. The two-stage AMTEC contains a first-stage BASE tube and a second-stage BASE tube. The first-stage BASE tube is arranged on the inner side of the second-stage BASE tube. The evaporator static pressure chamber and the intermediate static pressure chamber are separated by the first-stage BASE tube, and the intermediate static pressure chamber and the condenser static pressure chamber are separated by the second-stage BASE tube. The first-stage AMTEC contains a first-stage BASE tube, and the second-stage AMTEC contains a second-stage BASE tube.

[0044] Specifically, in this embodiment, the working process of the two-stage AMTEC-TRD thermal power generation system is as follows: the external heat flow enters the system through the evaporator of the two-stage AMTEC device, and the heat flow carries heat energy and flows through the evaporator, the evaporator static pressure chamber, the first-stage BASE tube, the intermediate static pressure chamber, the second-stage BASE tube, the condenser static pressure chamber and the condenser in sequence, and finally the waste heat is input into the TRD device through the condenser, and the heat energy is converted into electrical energy through the first-stage BASE tube and the second-stage BASE tube; then the TRD device receives the waste heat generated by the two-stage AMTEC device and converts the waste heat into electrical energy.

[0045] It should be noted that, in the present embodiment, both the first-stage BASE tube and the second-stage BASE tube have a cathode, a sodium ion dielectric and an anode. In the operation of the first-stage AMTEC, liquid sodium is heated and vaporized in the high-temperature chamber. Sodium ions are isothermally expanded from the high-temperature static pressure chamber to the intermediate static pressure chamber through the BASE tube. The pressure in the intermediate static pressure chamber is the vapor pressure at the open circuit plus the pressure drop generated by the electrons and ions during the recombination process, and then flows through the porous electrode at the closed loop. Sodium vapor releases heat and cools at a constant pressure, and is fully regenerated in the next-stage AMTEC. Sodium undergoes an isothermal expansion process from the intermediate static pressure chamber to the low-temperature condenser static pressure chamber. Sodium is cooled to condensation in the low-temperature condenser static pressure chamber and the waste heat is discharged;

[0046] See also Figure 2 As shown in Figure 1, the pn junction-based TRD is like a heat engine, which can convert thermal energy into electrical energy by exchanging photons with the surrounding environment. The temperature of TRD is higher than the ambient temperature because TRD absorbs the waste heat released by the two-stage AMTEC through thermal contact with the two-stage AMTEC. The thermal contact resistance between the two-stage AMTEC and TRD is ignored, and TRD is assumed to be at a uniform temperature. When the radiation recombination is faster than the radiation generation rate, the pn junction radiates more photons to the environment than the absorbed photons, resulting in a negative output voltage. Figure 1 (b) is the energy band diagram of TRD, where e - and h + represent electrons and holes respectively, E c and E v They represent the energy level at the bottom of the conduction band and the energy level at the top of the valence band, respectively. fe and E fh represent the quasi-Fermi levels of electrons and holes, respectively, and the quasi-Fermi level difference (E fe -E fh ) determines the voltage output V of TRD TR When a load is connected externally, electrons flow into the n-side and holes flow into the p-side.

[0047] See also Figure 3 , Figure 3A method flow diagram of a parameter optimization method for a two-stage AMTEC-TRD thermal power generation system is shown, wherein the method comprises:

[0048] S1: The first objective function is established by maximizing the system power output density, and the second objective function is established by maximizing the system output efficiency;

[0049] It should be noted that in this embodiment, in order to conveniently evaluate and compare the performance of the system, it is necessary to introduce the concept of power output density. In this project, the system power output density P is defined as the ratio of the total power output to the area of ​​the BASE tube in the first-stage AMTEC, that is, P max =P outmax / A1, where A1 represents the area of ​​the BASE tube in the first-stage AMTEC;

[0050] Specifically, in this embodiment, according to different mechanisms for measuring system performance, the energy transfer situation within the composite system is used to establish the first objective function with the maximum system power output density, specifically: P outmax =P AM,out +P TR,out , where P out Indicates system power output; P AM,out represents the subsystem power output of the two-stage AMTEC device; P TR,out represents the subsystem power output of the TRD device; the second objective function is established with the maximum system output efficiency, specifically: η max =P out / q H , where η represents the system output efficiency; q H represents the heat energy absorbed by the first-stage AMTEC of the two-stage AMTEC device; based on the law of conservation of energy, the total efficiency of the system can be expressed by the subsystem efficiency. Specifically, the subsystem efficiency of the two-stage AMTEC device can be expressed as η AM =P AM,out / q H , where η AM The subsystem efficiency of the two-stage AMTEC device is represented by η, and the subsystem efficiency of the TRD device can be expressed as η TR =P TR,out / q C , where η TR represents the subsystem efficiency of the TRD device, q C represents the heat energy transferred from the two-stage AMTEC to the TRD device. Therefore, the total efficiency of the system can also be expressed as Among them, q l Represents the heat loss released to the environment by the two-stage AMTEC.

[0051] S2: Obtain system operating parameters, perform thermodynamic analysis on the two-stage AMTEC-TRD thermal power generation system, divide the system operating parameters into independent variable parameters and dependent variable parameters, and construct multiple constraint equations of independent variable parameters and dependent variable parameters;

[0052] Specifically, in this embodiment, a thermodynamic analysis is performed on the two-stage AMTEC-TRD thermal power generation system, and the system operation parameters are divided into independent variable parameters and dependent variable parameters, wherein the independent variable parameters include the current density J1 of the first-stage AMTEC in the two-stage AMTEC device, the thickness D2 of the BASE tube in the second-stage AMTEC in the two-stage AMTEC device, and the intermediate temperature T in and the TRD device voltage V TR The dependent variable parameters include the current density J2 of the second-stage AMTEC device in the two-stage AMTEC device, the thickness D1 of the BASE tube in the first-stage AMTEC in the two-stage AMTEC device, and the condenser temperature T of the two-stage AMTEC. C , the area ratio of the TRD device to the area of ​​the BASE tube in the first AMTEC of the two-stage AMTEC device is A TR / A1≡m, the ratio of the area of ​​the BASE tube in the second-stage AMTEC to the area of ​​the BASE tube in the first-stage AMTEC in the two-stage AMTEC device is A2 / A1≡n;

[0053] Based on the law of conservation of energy, the principle of current continuity and the ideal gas equation of state, five constraint equations for independent variable parameters and dependent variable parameters are constructed, specifically:

[0054]

[0055] Wherein, J1 represents the current density of the first-stage AMTEC in the two-stage AMTEC device; n represents the ratio of the area of ​​the BASE tube in the second-stage AMTEC to the area of ​​the BASE tube in the first-stage AMTEC in the two-stage AMTEC device; J2 represents the current density of the second-stage AMTEC; T H represents the evaporator temperature of the two-stage AMTEC; T in represents the middle temperature of the two-stage AMTEC; M represents the molar mass of sodium; F represents the Faraday constant; L represents the latent heat of vaporization; σ represents the Stefan-Boltzmann constant; z represents the radiation reduction coefficient; P1 represents the power of the first-stage AMTEC; c p represents molar specific heat; P2 represents the power of the second-stage AMTEC; A2 represents the area of ​​the BASE tube in the second-stage AMTEC; T C represents the condenser temperature of the two-stage AMTEC; q l represents the heat loss released to the environment by the two-stage AMTEC; q Crepresents the heat energy transferred from two-stage AMTEC to TRD; p sat (T) represents the saturated vapor pressure at temperature T; μ represents the characteristic coefficient of BASE tube material; J TR Represents the current density of TRD; V TR Indicates the output voltage of TRD; A TR represents the surface area of ​​TRD; ΔE ph Represents the net radiated photon energy.

[0056] It should be noted that, in this embodiment, the five constraint equations are two energy balance equations, the constraint relationship between the β"-alumina solid electrolyte (BASE) tube and temperature in two alkali metal thermoelectric converters, and a current continuity equation.

[0057] S3: Based on multiple constraint equations, the first objective function and the second objective function are used to optimize the independent variable parameters and the dependent variable parameters to obtain the optimal parameter optimization interval, specifically:

[0058] At least one independent variable parameter is selected as the parameter to be optimized, and under the constraint relationship of multiple constraint equations, the objective function value of the parameter to be optimized is calculated using the first objective function and the second objective function, and the parameter optimization interval between the efficiency and the power output density and the parameter to be optimized is constructed.

[0059] Exemplarily, in this embodiment, in the independent variable T in , D2, J1, V TR Optimize the selection of D2, J1 and V TR Maximize efficiency or power output density, obtain the maximum values ​​of η and P, and optimize the working range, such as Figure 4(a)-Figure 4(b) shown. Figure 4(a)-Figure 4(b) It shows that when T in =865K≡T in,ηmax , the system achieves maximum efficiency η max ≈0.5437, when The system obtains the maximum power output density P max ≈145.1×10 3 Wm -2 . and is the maximum power output density and maximum efficiency T in The optimized value of and is the power output density at maximum efficiency and the efficiency at maximum power output density. Therefore, T in The optimization intervals of P and η are and When the system works within the above optimization range, the parameter T can be obtained. C,J1,J2,D1,D2,V TR , m and n at the maximum power output density (subscript P max ) or efficiency (subscript η max ) when the optimal value changes with T in The change curve of Figure 5(a)-Figure 5(h) shown. Figure 5(a)-Figure 5(h) Indicates that, in addition to and are the same, and other values ​​are different at the maximum power output density and maximum efficiency. The shaded area between the solid line and the dotted line is their optimal range.

[0060] At the same time, the thermal power generation system after the two-stage AMTEC device and the TRD device are coupled, and the optimization curve of the power output density of the two-stage AMTEC device alone varies with the efficiency is as follows Figure 6 shown. Figure 6 It shows that the maximum power output density and maximum efficiency can reach 145.1×10 3 W m -2 and 0.5437, which are 252% and 50.2% higher than those of the single two-stage AMTEC. The results show that the waste heat generated by the two-stage AMTEC can be effectively utilized by TRD, and the utilization efficiency is much higher than that of the single two-stage AMTEC device.

[0061] Example 2

[0062] See also Figure 7 As shown, the present invention also provides a parameter optimization system for a two-stage AMTEC-TRD thermal power generation system, characterized in that the system is used in any one of the above-mentioned parameter optimization methods for a two-stage AMTEC-TRD thermal power generation system, and the system comprises:

[0063] The first module 100 is used to establish a first objective function with a maximum system power output density and to establish a second objective function with a maximum system output efficiency;

[0064] The second module 200 is used to obtain system operating parameters and perform thermodynamic analysis on the two-stage AMTEC-TRD thermal power generation system, divide the system operating parameters into independent variable parameters and dependent variable parameters, and construct multiple constraint equations of the independent variable parameters and the dependent variable parameters;

[0065] The third module 300 is used to optimize the independent variable parameters and the dependent variable parameters based on multiple constraint equations using the first objective function and the second objective function to obtain the optimal parameter optimization interval.

[0066] It should be noted that the modules in the system of Example 2 correspond to the steps in the method of Example 1. The steps in the method of Example 1 have been described in detail in Example 1. In this Example 2, the contents of the modules in the system will not be described in detail.

[0067] Example 3

[0068] See also Figure 8 As shown, this embodiment further provides a computer device, including a system memory 1005 and a processor 1001, wherein the system memory 1005 stores a computer program, and the processor 1001 implements the steps of any one of the above methods when executing the computer program.

[0069] It should be noted that the processor 1001 is used to execute the steps in the above method embodiments according to the instructions in the program code. Alternatively, the processor 1001 implements the functions of each module / unit in the above system / device embodiments when executing the computer program.

[0070] Specifically, in this embodiment, the computer program may be divided into one or more modules / units, one or more modules / units are stored in the system memory 1005, and are executed by the processor 1001 to complete the present application. One or more modules / units may be a series of computer program instruction segments that can complete specific functions, and the instruction segments are used to describe the execution process of the computer program in the terminal device.

[0071] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor 1001 and a system memory 1005. Those skilled in the art will appreciate that this does not constitute a limitation on the terminal device, and may include more or less components than shown in the figure, or combine certain components, or different components. For example, the terminal device may also include an input / output device 1003, a network access device 1002, a bus 1006, etc.

[0072] The processor 1001 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0073] The system memory 1005 may be an internal storage unit of the terminal device, such as a hard disk or memory of the terminal device. The system memory 1005 may also be a storage device 1004 of the terminal device, such as a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (FlashCard), etc. equipped on the terminal device. Further, the system memory 1005 may also include both the internal storage unit of the terminal device and the storage device 1004. The system memory 1005 is used to store computer programs and other programs and data required by the terminal device. The system memory 1005 may also be used to temporarily store data that has been output or is to be output.

[0074] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described systems, systems and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0075] Example 4

[0076] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the above methods are implemented.

[0077] Among them, the computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared or semiconductor system, system or device, or any combination of the above. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer disk, a hard disk. Random Access Memory (RAM), Read-Only Memory (ROM), Erasable Programmable Read Only Memory (EPROM), registers, hard disks, optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above, or any other form of computer-readable storage medium known in the art.

[0078] An exemplary storage medium is coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an application-specific integrated circuit (ASIC). In an embodiment of the present invention, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system, or device.

[0079] Example 5

[0080] This embodiment also provides a computer program product including instructions. When the instructions are executed by a computer device cluster, the computer device cluster executes the method described in Embodiment 1.

[0081] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A two-stage AMTEC-TRD thermal power generation system, characterized in that: The system includes a two-stage AMTEC device and a TRD device. The two-stage AMTEC device is used to receive thermal energy and convert the thermal energy into electrical energy. The TRD device is connected to the two-stage AMTEC device and is used to receive waste heat generated by the two-stage AMTEC device and convert the waste heat of the two-stage AMTEC device into electrical energy.

2. A two-stage AMTEC-TRD solar thermal power generation system according to claim 1, characterized in that: The two-stage AMTEC device includes an evaporator static pressure chamber, an intermediate static pressure chamber and a condenser static pressure chamber. The two-stage AMTEC contains a first-stage BASE tube and a second-stage BASE tube. The first-stage BASE tube is arranged on the inner side of the second-stage BASE tube. The evaporator static pressure chamber and the intermediate static pressure chamber are separated by the first-stage BASE tube, and the intermediate static pressure chamber and the condenser static pressure chamber are separated by the second-stage BASE tube. The first-stage AMTEC contains a first-stage BASE tube, and the second-stage AMTEC contains a second-stage BASE tube.

3. A parameter optimization method for a two-stage AMTEC-TRD thermal power generation system according to any one of claims 1-2, characterized in that: Methods include: The first objective function is established by maximizing the system power output density, and the second objective function is established by maximizing the system output efficiency; Obtain system operating parameters, perform thermodynamic analysis on the two-stage AMTEC-TRD thermal power generation system, divide the system operating parameters into independent variable parameters and dependent variable parameters, and construct multiple constraint equations for independent variable parameters and dependent variable parameters; Based on multiple constraint equations, the independent variable parameters and the dependent variable parameters are optimized using the first objective function and the second objective function to obtain the optimal parameter optimization interval.

4. The parameter optimization method of a two-stage AMTEC-TRD thermal power generation system according to claim 3 is characterized in that: The system operating parameters are obtained, and a thermodynamic analysis is performed on the two-stage AMTEC-TRD thermal power generation system. The system operating parameters are divided into independent variable parameters and dependent variable parameters. The independent variable parameters include the current density of the first-stage AMTEC in the two-stage AMTEC device, the thickness of the BASE tube in the second-stage AMTEC in the two-stage AMTEC device, the intermediate temperature of the two-stage AMTEC device, and the voltage of the TRD device; the dependent variable parameters include the current density of the second-stage AMTEC device in the two-stage AMTEC device, the thickness of the BASE tube in the first-stage AMTEC in the two-stage AMTEC device, the condenser temperature of the two-stage AMTEC, the ratio of the area of ​​the TRD device to the area of ​​the BASE tube in the first-stage AMTEC in the two-stage AMTEC device, and the ratio of the area of ​​the BASE tube in the first-stage AMTEC in the two-stage AMTEC device to the area of ​​the BASE tube in the second-stage AMTEC.

5. The parameter optimization method of a two-stage AMTEC-TRD thermal power generation system according to claim 4 is characterized in that: Construct multiple constraint equations for independent variable parameters and dependent variable parameters, specifically: Wherein, J1 represents the current density of the first-stage AMTEC in the two-stage AMTEC device; n represents the ratio of the area of ​​the BASE tube in the second-stage AMTEC to the area of ​​the BASE tube in the first-stage AMTEC in the two-stage AMTEC device; J2 represents the current density of the second-stage AMTEC; T H represents the evaporator temperature of the two-stage AMTEC; T in represents the middle temperature of the two-stage AMTEC; M represents the molar mass of sodium; F represents the Faraday constant; L represents the latent heat of vaporization; σ represents the Stefan-Boltzmann constant; z represents the radiation reduction coefficient; P1 represents the power of the first-stage AMTEC; c p represents molar specific heat; P2 represents the power of the second-stage AMTEC; A2 represents the area of ​​the BASE tube in the second-stage AMTEC; T C represents the condenser temperature of the two-stage AMTEC; q l represents the heat loss released to the environment by the two-stage AMTEC; q C represents the heat energy transferred from two-stage AMTEC to TRD; p sat (T) represents the saturated vapor pressure at temperature T; μ represents the characteristic coefficient of BASE tube material; J TR Represents the current density of TRD; V TR Indicates the output voltage of TRD; A TR represents the surface area of ​​TRD; ΔE ph Represents the net radiated photon energy.

6. The parameter optimization method of a two-stage AMTEC-TRD thermal power generation system according to claim 4, characterized in that: Based on multiple constraint equations, the first objective function and the second objective function are used to optimize the independent variable parameters and the dependent variable parameters to obtain the optimal parameter optimization interval, which is specifically: At least one independent variable parameter is selected as the parameter to be optimized, and under the constraint relationship of multiple constraint equations, the objective function value of the parameter to be optimized is calculated using the first objective function and the second objective function, and the parameter optimization interval between the efficiency and the power output density and the parameter to be optimized is constructed.

7. A parameter optimization system for a two-stage AMTEC-TRD thermal power generation system, characterized in that: The system is used in a parameter optimization method of a two-stage AMTEC-TRD thermal power generation system as described in any one of claims 3 to 6, and the system comprises: The first module is used to establish a first objective function with a maximum system power output density and to establish a second objective function with a maximum system output efficiency; The second module is used to obtain the system operating parameters and perform thermodynamic analysis on the two-stage AMTEC-TRD thermal power generation system, divide the system operating parameters into independent variable parameters and dependent variable parameters, and construct multiple constraint equations for independent variable parameters and dependent variable parameters; The third module is used to optimize the independent variable parameters and the dependent variable parameters based on multiple constraint equations using the first objective function and the second objective function to obtain the optimal parameter optimization interval.

8. A computer device comprising a system memory and a processor, wherein the system memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 3 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 3 to 6 are implemented.

10. A computer program product comprising instructions, characterized in that When the instructions are executed by a computer device cluster, the computer device cluster executes the method according to any one of claims 3 to 6.

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