A concentrated solar power copper chain power generation system

Abstract

The application discloses a concentrated solar copper chain power generation system and relates to the field of concentrated solar power generation. The system comprises a copper oxide storage tank, a solar reactor, a cuprous oxide storage tank, an oxidation reactor, a first power generation system, a second power generation system and a third power generation system. The outlet of the copper oxide storage tank is connected with the first inlet of the solar reactor. The second inlet of the solar reactor is used for feeding nitrogen. The outlet of the oxidation reactor is connected with the inlet of the cuprous oxide storage tank and the first power generation system respectively. The outlet of the cuprous oxide storage tank is connected with the first inlet of the oxidation reactor. The second inlet of the oxidation reactor is used for feeding air. The outlet of the oxidation reactor is connected with the inlet of the copper oxide storage tank, the second power generation system and the third power generation system respectively. The application can generate power all day long by using solar energy.

Description

Technical Field

[0001] This invention relates to the field of concentrated solar power generation, and in particular to a concentrated solar copper chain power generation system. Background Technology

[0002] In recent decades, excessive greenhouse gas emissions have caused a series of adverse effects on natural ecosystems and the human living environment. To mitigate global warming and resource depletion, people have gradually increased their use of renewable energy. Solar energy has long been an important component of renewable energy, but it is intermittent, usable only during the day and cannot be arbitrarily controlled according to human needs. Therefore, how to utilize solar energy for 24 / 7 power generation has become an urgent problem to be solved. Summary of the Invention

[0003] Based on this, embodiments of the present invention provide a concentrated solar copper chain power generation system that can generate electricity around the clock using solar energy.

[0004] To achieve the above objectives, embodiments of the present invention provide the following solutions:

[0005] A concentrated solar copper chain power generation system includes: a copper oxide storage tank, a solar reactor, a cuprous oxide storage tank, an oxidation reactor, a first power generation system, a second power generation system, and a third power generation system;

[0006] The outlet of the copper oxide storage tank is connected to the first inlet of the solar reactor; the second inlet of the solar reactor is used to introduce nitrogen gas; the outlet of the oxidation reactor is connected to the inlet of the cuprous oxide storage tank and the first power generation system, respectively; the outlet of the cuprous oxide storage tank is connected to the first inlet of the oxidation reactor; the second inlet of the oxidation reactor is used to introduce air; the outlet of the oxidation reactor is connected to the inlet of the copper oxide storage tank, the second power generation system, and the third power generation system, respectively.

[0007] The copper oxide storage tank is used to supply copper oxide to the solar reactor; the solar reactor is used to decompose the copper oxide endothermally to generate cuprous oxide and oxygen under the drive of solar energy and the atmosphere of nitrogen, and to store the solid material in the cuprous oxide storage tank and transfer the gaseous material to the first power generation system; the solid material includes at least cuprous oxide; the gaseous material includes nitrogen and oxygen after decomposition reaction; the first power generation system is used to convert the heat of the gaseous material into electrical energy;

[0008] The cuprous oxide storage tank is used to supply cuprous oxide to the oxidation reactor; the oxidation reactor is used to cause the cuprous oxide to undergo an oxidation reaction in the atmosphere of air to generate copper oxide for storage in the copper oxide storage tank, while releasing heat to obtain the heat of the oxidation reaction.

[0009] In daytime mode, the second power generation system is used to convert part of the oxidation reaction heat into electrical energy, and another part of the oxidation reaction heat is used to provide the heat required for the decomposition of copper oxide in the solar reactor;

[0010] In night mode, the second power generation system is used to convert part of the oxidation reaction heat into electrical energy, and another part of the oxidation reaction heat is transferred to the third power generation system; the third power generation system is used to convert another part of the oxidation reaction heat into electrical energy in night mode.

[0011] Optionally, the concentrated solar copper chain power generation system further includes: a first compressor and a first heat exchanger;

[0012] The first compressor, the first inlet of the first heat exchanger, and the second inlet of the solar reactor are connected in sequence; the first compressor is used to compress the introduced nitrogen gas; the first heat exchanger is used to exchange heat and raise the temperature of the compressed nitrogen gas.

[0013] Optionally, the concentrated solar copper chain power generation system further includes: a first separator and a second heat exchanger;

[0014] The outlet of the solar reactor is connected to the inlet of the first separator; the first outlet of the first separator is connected to the inlet of the cuprous oxide storage tank; the second outlet of the first separator is connected to the first inlet of the second heat exchanger; the first outlet of the second heat exchanger is connected to the first power generation system; the outlet of the copper oxide storage tank is connected to the second inlet of the second heat exchanger; the second outlet of the second heat exchanger is connected to the first inlet of the solar reactor.

[0015] The first separator is used to separate the solid and gaseous substances after the decomposition reaction in the solar reactor, so that the solid substances are stored in the cuprous oxide storage tank and the gaseous substances enter the second heat exchanger.

[0016] The second heat exchanger is used to exchange heat with the gaseous substance to obtain the first heat, and to exchange heat with the incoming copper oxide to raise its temperature; the first heat is used to generate electricity for the first power generation system and to raise the temperature of the copper oxide.

[0017] Optionally, the first power generation system includes: a third heat exchanger, a first turbine, a first generator, a first condenser, and a first pump;

[0018] The first inlet of the third heat exchanger is connected to the first outlet of the second heat exchanger; the first outlet of the third heat exchanger is connected to the input end of the first turbine; the first output end of the first turbine is connected to the first generator; the second output end of the first turbine is connected to the first pump through the first condenser; the output end of the first pump is connected to the second inlet of the third heat exchanger.

[0019] The third heat exchanger is used to heat the first working fluid by exchanging heat with the first heat; the first turbine is used to expand and do work based on the first working fluid after heat exchange, so that the first generator outputs electrical energy; the first condenser is used to condense the first working fluid after expansion and work; the first pump is used to pressurize the condensed first working fluid, so that the pressurized first working fluid enters the third heat exchanger.

[0020] Optionally, the concentrated solar copper chain power generation system further includes: a second compressor, a fourth heat exchanger, a fifth heat exchanger, and a second separator;

[0021] The second compressor, the first inlet of the fourth heat exchanger, the first outlet of the fourth heat exchanger, the first inlet of the fifth heat exchanger, the first outlet of the fifth heat exchanger, and the second inlet of the oxidation reactor are connected in sequence; the outlet of the oxidation reactor is connected to the inlet of the second separator; the first outlet of the second separator, the second power generation system, and the second inlet of the fourth heat exchanger are connected in sequence; in daytime mode, the second outlet of the fourth heat exchanger is connected to the second inlet of the first heat exchanger; in nighttime mode, the second outlet of the fourth heat exchanger is connected to the third power generation system; the second outlet of the second separator, the second inlet of the fifth heat exchanger, the second outlet of the fifth heat exchanger, and the inlet of the copper oxide storage tank are connected in sequence.

[0022] The second compressor is used to compress the incoming air; the fourth heat exchanger is used to perform a primary heat exchange and temperature increase on the compressed air; the fifth heat exchanger is used to perform a secondary heat exchange and temperature increase on the incoming air before it enters the oxidation reactor; the second separator is used to separate the copper oxide and air after the oxidation reaction in the oxidation reactor, so that the copper oxide carrying the heat of the oxidation reaction is stored in the copper oxide storage tank after heat exchange in the fifth heat exchanger, and the air carrying the heat of the oxidation reaction is transferred to the second power generation system;

[0023] In daytime mode, the second power generation system generates electricity based on a portion of the air carrying the heat of the oxidation reaction, while another portion of the air carrying the heat of the oxidation reaction passes through the fourth heat exchanger and the first heat exchanger to provide the solar reactor with the heat required for the decomposition of copper oxide.

[0024] In night mode, the second power generation system generates electricity from a portion of the air carrying heat from the oxidation reaction, while the other portion of the air carrying heat from the oxidation reaction is heated by the fourth heat exchanger to provide heat for the third power generation system to generate electricity.

[0025] Optionally, the second power generation system includes: a second turbine and a second generator;

[0026] The first outlet of the second separator is connected to the input end of the second turbine; the first output end of the second turbine is connected to the second generator; and the second output end of the second turbine is connected to the second inlet of the fourth heat exchanger.

[0027] The second turbine is used to expand and do work by partially expanding the air carrying the heat of the oxidation reaction, so that the second generator can output electrical energy.

[0028] Optionally, the third power generation system includes: a sixth heat exchanger, a third turbine, a third generator, a second condenser, and a second pump;

[0029] The first inlet of the sixth heat exchanger is connected to the second outlet of the fourth heat exchanger; the first outlet of the sixth heat exchanger is connected to the input end of the third turbine; the first output end of the third turbine is connected to the third generator; the second output end of the third turbine is connected to the second pump through the second condenser; the output end of the second pump is connected to the second inlet of the sixth heat exchanger.

[0030] The sixth heat exchanger is used to exchange heat with the second working fluid using another portion of air carrying the heat of the oxidation reaction; the third turbine is used to expand and do work based on the second working fluid after heat exchange, so that the third generator outputs electrical energy; the second condenser is used to condense the second working fluid after expansion and work; the second pump is used to pressurize the condensed second working fluid, so that the pressurized second working fluid enters the sixth heat exchanger.

[0031] Optionally, the solid material further includes copper oxide that has not undergone a decomposition reaction in the solar reactor.

[0032] Optionally, the second working fluid is an organic liquid.

[0033] Optionally, the first working medium is water.

[0034] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0035] The concentrated solar copper chain power generation system of this invention includes a copper oxide storage tank, a solar reactor, a cuprous oxide storage tank, an oxidation reactor, a first power generation system, a second power generation system, and a third power generation system. This power generation system is a thermochemical energy storage system that uses the redox reaction between copper oxide and cuprous oxide to store and release heat, thus realizing all-day power generation using solar energy. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of a concentrated solar copper chain power generation system provided in an embodiment of the present invention.

[0038] Symbol explanation:

[0039] First compressor—1, First heat exchanger—2, Solar reactor—3, First separator—4, Second heat exchanger—5, Third heat exchanger—6, First turbine—7, First generator—8, First condenser—9, First pump—10, Cuprous oxide storage tank—11, Second compressor—12, Fourth heat exchanger—13, Fifth heat exchanger—14, Oxidation reactor—15, Second separator—16, Second turbine—17, Second generator—18, Copper oxide storage tank—19, Sixth heat exchanger—20, Third turbine—21, Third generator—22, Second condenser—23, Second pump—24. Detailed Implementation

[0040] The technical solutions of the present invention will now be described with reference to the accompanying drawings in the embodiments of the present invention.

[0041] Since solar energy can only be utilized during the day, its effective use must be combined with energy storage technology. Thermochemical energy storage is an energy storage method that has received much attention in recent years. It utilizes the thermal effect of chemical reactions to store and release heat. Coupled with thermochemical energy storage on the basis of concentrated solar power generation, it can increase the dispatch capability during periods of varying solar radiation or at night, and extend operating time and power generation.

[0042] The purpose of this invention is to provide a concentrated solar copper chain power generation system that utilizes the redox reaction between copper oxide and cuprous oxide to store and release heat, thereby enabling all-day power generation using solar energy.

[0043] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] See Figure 1 The concentrated solar copper chain power generation system of this embodiment includes: copper oxide storage tank 19, solar reactor 3, cuprous oxide storage tank 11, oxidation reactor 15, first power generation system, second power generation system and third power generation system.

[0045] The outlet of the copper oxide storage tank 19 is connected to the first inlet of the solar reactor 3; the second inlet of the solar reactor 3 is used to introduce nitrogen gas; the outlet of the oxidation reactor 15 is connected to the inlet of the cuprous oxide storage tank 11 and the first power generation system, respectively; the outlet of the cuprous oxide storage tank 11 is connected to the first inlet of the oxidation reactor 15; the second inlet of the oxidation reactor 15 is used to introduce air; the outlet of the oxidation reactor 15 is connected to the inlet of the copper oxide storage tank 19, the second power generation system, and the third power generation system, respectively.

[0046] The copper oxide storage tank 19 is used to supply copper oxide to the solar reactor 3. The solar reactor 3, driven by solar energy and in a nitrogen atmosphere, causes the copper oxide to undergo endothermic decomposition to generate cuprous oxide and oxygen, storing the solid material in the cuprous oxide storage tank 11 and transferring the gaseous material to the first power generation system. The solid material includes at least cuprous oxide; the gaseous material includes nitrogen and oxygen produced from the decomposition reaction. In practical applications, the solid material may also include copper oxide that has not undergone decomposition in the solar reactor 3. The first power generation system is used to convert the heat from the gaseous material into electrical energy.

[0047] The cuprous oxide storage tank 11 is used to supply cuprous oxide to the oxidation reactor 15; the oxidation reactor 15 is used to cause the cuprous oxide to undergo an oxidation reaction in the atmosphere of air to generate copper oxide for storage in the copper oxide storage tank 19, while releasing heat to obtain the heat of the oxidation reaction.

[0048] In daytime mode, the second power generation system is used to convert part of the oxidation reaction heat into electrical energy, and another part of the oxidation reaction heat is used to provide the heat required for the decomposition of copper oxide in the solar reactor 3.

[0049] In night mode, the second power generation system is used to convert part of the oxidation reaction heat into electrical energy, and another part of the oxidation reaction heat is transferred to the third power generation system; the third power generation system is used to convert another part of the oxidation reaction heat into electrical energy in night mode.

[0050] In one example, the concentrated solar copper chain power generation system further includes: a first compressor 1 and a first heat exchanger 2. The first compressor 1, the first inlet of the first heat exchanger 2, and the second inlet of the solar reactor 3 are connected in sequence; the first compressor 1 is used to compress the introduced nitrogen gas; the first heat exchanger 2 is used to exchange heat and raise the temperature of the compressed nitrogen gas.

[0051] In one example, the concentrated solar copper chain power generation system further includes: a first separator 4 and a second heat exchanger 5. The outlet of the solar reactor 3 is connected to the inlet of the first separator 4; the first outlet of the first separator 4 is connected to the inlet of the cuprous oxide storage tank 11; the second outlet of the first separator 4 is connected to the first inlet of the second heat exchanger 5; the first outlet of the second heat exchanger 5 is connected to the first power generation system; the outlet of the copper oxide storage tank 19 is connected to the second inlet of the second heat exchanger 5; and the second outlet of the second heat exchanger 5 is connected to the first inlet of the solar reactor 3.

[0052] The first separator 4 is used to separate the solid and gaseous substances after the decomposition reaction in the solar reactor 3, so that the solid substances are stored in the cuprous oxide storage tank 11 and the gaseous substances enter the second heat exchanger 5.

[0053] The second heat exchanger 5 is used to exchange heat with the gaseous substance to obtain the first heat, and to exchange heat with the incoming copper oxide to raise its temperature; the first heat is used to generate electricity for the first power generation system and to raise the temperature of the copper oxide.

[0054] In one example, the first power generation system includes: a third heat exchanger 6, a first turbine 7, a first generator 8, a first condenser 9, and a first pump 10. The first inlet of the third heat exchanger 6 is connected to the first outlet of the second heat exchanger 5; the first outlet of the third heat exchanger 6 is connected to the input of the first turbine 7; the first output of the first turbine 7 is connected to the first generator 8; the second output of the first turbine 7 is connected to the first pump 10 via the first condenser 9; and the output of the first pump 10 is connected to the second inlet of the third heat exchanger 6.

[0055] The third heat exchanger 6 is used to exchange heat with the first working fluid to raise its temperature; the first turbine 7 is used to expand and do work based on the first working fluid after heat exchange, so that the first generator 8 outputs electrical energy; the first condenser 9 is used to condense the first working fluid after expansion and work; the first pump 10 is used to pressurize the condensed first working fluid, so that the pressurized first working fluid enters the third heat exchanger 6. The first working fluid can be water.

[0056] In one example, the concentrated solar copper chain power generation system further includes: a second compressor 12, a fourth heat exchanger 13, a fifth heat exchanger 14, and a second separator 16. The second compressor 12, the first inlet of the fourth heat exchanger 13, the first outlet of the fourth heat exchanger 13, the first inlet of the fifth heat exchanger 14, the first outlet of the fifth heat exchanger 14, and the second inlet of the oxidation reactor 15 are sequentially connected; the outlet of the oxidation reactor 15 is connected to the inlet of the second separator 16; the first outlet of the second separator 16, the second power generation system, and the second inlet of the fourth heat exchanger 13 are sequentially connected; in daytime mode, the second outlet of the fourth heat exchanger 13 is connected to the second inlet of the first heat exchanger 13; in nighttime mode, the second outlet of the fourth heat exchanger 13 is connected to the third power generation system; the second outlet of the second separator 16, the second inlet of the fifth heat exchanger 14, the second outlet of the fifth heat exchanger 14, and the inlet of the copper oxide storage tank 19 are sequentially connected.

[0057] The second compressor 12 is used to compress the incoming air; the fourth heat exchanger 13 is used to perform a primary heat exchange and temperature increase on the compressed air; the fifth heat exchanger 14 is used to perform a secondary heat exchange and temperature increase on the incoming air before it enters the oxidation reactor 15; the second separator 16 is used to separate the copper oxide and air after the oxidation reaction in the oxidation reactor 15, so that the copper oxide carrying the heat of the oxidation reaction is stored in the copper oxide storage tank 19 after heat exchange in the fifth heat exchanger 14, and the air carrying the heat of the oxidation reaction is transferred to the second power generation system.

[0058] In daytime mode, the second power generation system generates electricity from a portion of the air carrying heat from the oxidation reaction, while the other portion of the air carrying heat from the oxidation reaction passes through the fourth heat exchanger 13 and the first heat exchanger to provide the solar reactor 3 with the heat required for the decomposition of copper oxide.

[0059] In night mode, the second power generation system generates electricity from a portion of the air carrying heat from the oxidation reaction, while the other portion of the air carrying heat from the oxidation reaction is heated by the fourth heat exchanger 13 to provide heat for the third power generation system to generate electricity.

[0060] In one example, the second power generation system includes a second turbine 17 and a second generator 18. The first outlet of the second separator 16 is connected to the input of the second turbine 17; the first output of the second turbine 17 is connected to the second generator 18; and the second output of the second turbine 17 is connected to the second inlet of the fourth heat exchanger 13.

[0061] The second turbine 17 is used to expand and do work by partially expanding the air carrying the heat of the oxidation reaction, so that the second generator 18 can output electrical energy.

[0062] In one example, the third power generation system includes: a sixth heat exchanger 20, a third turbine 21, a third generator 22, a second condenser 23, and a second pump 24. The first inlet of the sixth heat exchanger 20 is connected to the second outlet of the fourth heat exchanger 13; the first outlet of the sixth heat exchanger 20 is connected to the input of the third turbine 21; the first output of the third turbine 21 is connected to the third generator 22; the second output of the third turbine 21 is connected to the second pump 24 via the second condenser 23; and the output of the second pump 24 is connected to the second inlet of the sixth heat exchanger 20.

[0063] The sixth heat exchanger 20 is used to heat the second working fluid by exchanging heat with another portion of the air carrying the heat of the oxidation reaction; the third turbine 21 is used to expand and do work based on the second working fluid after heat exchange, so that the third generator 22 outputs electrical energy; the second condenser 23 is used to condense the second working fluid after expansion and work; the second pump 24 is used to pressurize the condensed second working fluid, so that the pressurized second working fluid enters the sixth heat exchanger 20. The second working fluid can be an organic liquid, such as dichlorofluoroethane (R141B).

[0064] The following is combined with Figure 1 The specific implementation process and implementation principle of the concentrated solar copper chain power generation system in the above embodiments will be further described in detail.

[0065] Please see again Figure 1 The first compressor 1, the first heat exchanger 2, the solar reactor 3, the first separator 4, the second heat exchanger 5, and the third heat exchanger 6 are connected together.

[0066] The third heat exchanger 6, the first turbine 7, the first condenser 9, the first pump 10, and the third heat exchanger 6 are connected together.

[0067] Solar reactor 3, first separator 4, cuprous oxide storage tank 11, oxidation reactor 15, second separator 16, fifth heat exchanger 14, copper oxide storage tank 19, second heat exchanger 5, and solar reactor 3 are connected together.

[0068] The second compressor 12, the fourth heat exchanger 13, the fifth heat exchanger 14, the oxidation reactor 15, the second separator 16, the second turbine 17, the fourth heat exchanger 13, and the first heat exchanger 2 are connected together.

[0069] The second compressor 12, the fourth heat exchanger 13, the fifth heat exchanger 14, the oxidation reactor 15, the second separator 16, the second turbine 17, the fourth heat exchanger 13, and the sixth heat exchanger 20 are connected together.

[0070] The sixth heat exchanger 20, the third turbine 21, the second condenser 23, the second pump 24, and the sixth heat exchanger 20 are connected together.

[0071] Applications of the concentrated solar copper chain power generation system shown above:

[0072] The system has two operating modes: daytime mode when solar irradiance is sufficient to support reactor operation, and nighttime mode for the other modes.

[0073] In daytime mode, the copper oxide solid stream flows from the copper oxide storage tank 19 to the second heat exchanger 5 for heat exchange and temperature increase, and then enters the solar reactor 3. Simultaneously, nitrogen gas is compressed by the first compressor 1, heat exchanged and heated by the first heat exchanger 2, and then enters the solar reactor 3. Inside the solar reactor 3, copper oxide decomposes endothermally in a nitrogen atmosphere to generate cuprous oxide and oxygen. The reaction products and unreacted portions of the reactants are separated by the first separator 4. The solid portion flows into the cuprous oxide storage tank 11 for storage, while the gaseous portion flows to the second heat exchanger 5 to exchange heat, and then enters the third heat exchanger 6 to exchange heat before being discharged.

[0074] The exhaust gas from the first turbine 7 is condensed by the first condenser 9 and then pressurized by the first pump 10. After that, it enters the third heat exchanger 6 for heat exchange and temperature increase, becoming high-temperature and high-pressure steam. Then, it enters the first turbine 7 to expand and do work, outputting electrical energy through the first generator 8. The steam after doing work enters the first condenser 9 for condensation to complete the cycle.

[0075] After being compressed by the second compressor 12, the air enters the fourth heat exchanger 13 for heat exchange and temperature increase, and then enters the fifth heat exchanger 14 for further heat exchange and temperature increase. Finally, it enters the oxidation reactor 15 together with the cuprous oxide solid stream flowing out of the cuprous oxide storage tank 11 to undergo an oxidation reaction, generating copper oxide and releasing heat. The reaction products and unreacted portions of the reactants are separated by the second separator 16. The solid portion passes through the fifth heat exchanger 14 to exchange heat, and then flows into the copper oxide storage tank 19 for storage. The gaseous portion enters the second turbine 17 to expand and do work, outputting electrical energy through the second generator 18. The gaseous portion after doing work passes through the fourth heat exchanger 13 to exchange heat, and then enters the first heat exchanger 2 to exchange heat before being discharged.

[0076] In night mode, air is compressed by the second compressor 12 and then enters the fourth heat exchanger 13 for heat exchange and temperature increase. It then enters the fifth heat exchanger 14 for further heat exchange and temperature increase. Finally, it enters the oxidation reactor 15 together with the cuprous oxide solid stream flowing from the cuprous oxide storage tank 11 to undergo an oxidation reaction, generating copper oxide and releasing heat. The reaction products and unreacted portions of the reactants are separated by the second separator 16. The solid portion passes through the fifth heat exchanger 14 to exchange heat and then flows into the copper oxide storage tank 19 for storage. The gaseous portion enters the second turbine 17 to expand and do work, outputting electrical energy through the second generator 18. The gaseous portion, after doing work, enters the fourth heat exchanger 13 to exchange heat and then enters the sixth heat exchanger 20 to exchange heat before being discharged.

[0077] The exhaust gas from the third turbine 21 is condensed by the second condenser 23 and then pressurized by the second pump 24. After that, it enters the sixth heat exchanger 20 for heat exchange and temperature increase, becoming high-temperature and high-pressure steam. Then, it enters the third turbine 21 to expand and do work, outputting electrical energy through the third generator 22. The steam after doing work enters the second condenser 23 for condensation to complete the cycle.

[0078] The results of the embodiments of the present invention will be explained below with reference to numerical examples.

[0079] The initial conditions of the system are set as shown in Tables 1, 2, 3 and 4. Based on these initial conditions, the calculation results of the system are shown in Table 5.

[0080] Table 1 Main parameters of the solar reactor

[0081] Solar reactor operating temperature ℃ 1000 Oxidation reactor operating temperature ℃ 1000 Oxygen fraction in solar reactor 9％ Copper oxide conversion rate in solar reactor 0.5 Cuprous oxide conversion rate in oxidation reactor 1 Daytime mode duration h 8 Night mode duration h 16

[0082] Table 2 Main parameters of the heat exchanger

[0083]

[0084]

[0085] Table 3 Main parameters of turbines and compressors

[0086] First turbine mechanical efficiency 0.98 First turbine exhaust pressure bar 0.04 First turbine working fluid water Second permeability entropy efficiency 0.9 Second turbine mechanical efficiency 0.98 Second turbine exhaust pressure bar 1.219 Third turbine exhaust pressure bar 1 Third-level entropy efficiency 0.87 Third turbine mechanical efficiency 0.98 Third turbine exhaust pressure bar 1 Third turbine working fluid R141B The first compressor's isentropic efficiency 0.87 First compressor mechanical efficiency 0.98 First compressor discharge pressure bar 1.231 The isentropic efficiency of the second compressor 0.87 Second compressor mechanical efficiency 0.98 Second compressor discharge pressure bar 4.63

[0087] Table 4. Main parameters of pumps and condensers

[0088] First pump operating pressure bar 45 Second condenser condensing temperature ℃ 30 Second pump operating pressure bar 17

[0089] Table 5 Calculation Results

[0090]

[0091] As shown in Table 5, this concentrated solar copper chain power generation system overcomes the intermittency of solar energy, generating electricity both day and night, and achieving a total efficiency of 40.16% throughout the day.

[0092] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0093] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the system and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A concentrated solar copper chain power generation system, characterized in that, include: Copper oxide storage tank, solar reactor, cuprous oxide storage tank, oxidation reactor, first power generation system, second power generation system and third power generation system; The outlet of the copper oxide storage tank is connected to the first inlet of the solar reactor; the second inlet of the solar reactor is used to introduce nitrogen gas; the outlet of the solar reactor is connected to the inlet of the cuprous oxide storage tank and the first power generation system, respectively; the outlet of the cuprous oxide storage tank is connected to the first inlet of the oxidation reactor; the second inlet of the oxidation reactor is used to introduce air; the outlet of the oxidation reactor is connected to the inlet of the copper oxide storage tank, the second power generation system, and the third power generation system, respectively. The copper oxide storage tank is used to supply copper oxide to the solar reactor; the solar reactor is used to decompose the copper oxide endothermally to generate cuprous oxide and oxygen under the drive of solar energy and the atmosphere of nitrogen, and to store the solid material in the cuprous oxide storage tank and to transfer the gaseous material to the first power generation system. The solid substance includes at least cuprous oxide; the gaseous substance includes nitrogen and oxygen produced after the decomposition reaction; the first power generation system is used to convert the heat of the gaseous substance into electrical energy; The cuprous oxide storage tank is used to supply cuprous oxide to the oxidation reactor; the oxidation reactor is used to cause the cuprous oxide to undergo an oxidation reaction in the atmosphere of air to generate copper oxide for storage in the copper oxide storage tank, while releasing heat to obtain the heat of the oxidation reaction. In daytime mode, the second power generation system is used to convert part of the oxidation reaction heat into electrical energy, and another part of the oxidation reaction heat is used to provide the heat required for the decomposition of copper oxide in the solar reactor; In night mode, the second power generation system converts a portion of the oxidation reaction heat into electrical energy, while the other portion of the oxidation reaction heat is transferred to the third power generation system; the third power generation system converts the other portion of the oxidation reaction heat into electrical energy in night mode. The concentrated solar copper chain power generation system is a thermochemical energy storage system that uses the redox reaction between copper oxide and cuprous oxide to store and release heat; the operating temperature of the solar reactor and the oxidation reactor is 1000℃.

2. The concentrated solar copper chain power generation system according to claim 1, characterized in that, Also includes: The first compressor and the first heat exchanger; The first compressor, the first inlet of the first heat exchanger, and the second inlet of the solar reactor are connected in sequence; the first compressor is used to compress the introduced nitrogen gas; the first heat exchanger is used to exchange heat and raise the temperature of the compressed nitrogen gas.

3. The concentrated solar copper chain power generation system according to claim 1, characterized in that, Also includes: First separator and second heat exchanger; The outlet of the solar reactor is connected to the inlet of the first separator; the first outlet of the first separator is connected to the inlet of the cuprous oxide storage tank; the second outlet of the first separator is connected to the first inlet of the second heat exchanger; the first outlet of the second heat exchanger is connected to the first power generation system; the outlet of the copper oxide storage tank is connected to the second inlet of the second heat exchanger; the second outlet of the second heat exchanger is connected to the first inlet of the solar reactor. The first separator is used to separate the solid and gaseous substances after the decomposition reaction in the solar reactor, so that the solid substances are stored in the cuprous oxide storage tank and the gaseous substances enter the second heat exchanger. The second heat exchanger is used to exchange heat with the gaseous substance to obtain the first heat, and to exchange heat with the incoming copper oxide to raise its temperature; the first heat is used to generate electricity for the first power generation system and to raise the temperature of the copper oxide.

4. The concentrated solar copper chain power generation system according to claim 3, characterized in that, The first power generation system includes: a third heat exchanger, a first turbine, a first generator, a first condenser, and a first pump; The first inlet of the third heat exchanger is connected to the first outlet of the second heat exchanger; the first outlet of the third heat exchanger is connected to the input end of the first turbine; the first output end of the first turbine is connected to the first generator; the second output end of the first turbine is connected to the first pump through the first condenser; the output end of the first pump is connected to the second inlet of the third heat exchanger. The third heat exchanger is used to heat the first working fluid by exchanging heat with the first heat; the first turbine is used to expand and do work based on the first working fluid after heat exchange, so that the first generator outputs electrical energy; the first condenser is used to condense the first working fluid after expansion and work; the first pump is used to pressurize the condensed first working fluid, so that the pressurized first working fluid enters the third heat exchanger.

5. The concentrated solar copper chain power generation system according to claim 2, characterized in that, Also includes: Second compressor, fourth heat exchanger, fifth heat exchanger and second separator; The second compressor, the first inlet of the fourth heat exchanger, the first outlet of the fourth heat exchanger, the first inlet of the fifth heat exchanger, the first outlet of the fifth heat exchanger, and the second inlet of the oxidation reactor are connected in sequence; the outlet of the oxidation reactor is connected to the inlet of the second separator; the first outlet of the second separator, the second power generation system, and the second inlet of the fourth heat exchanger are connected in sequence; in daytime mode, the second outlet of the fourth heat exchanger is connected to the second inlet of the first heat exchanger; in nighttime mode, the second outlet of the fourth heat exchanger is connected to the third power generation system; the second outlet of the second separator, the second inlet of the fifth heat exchanger, the second outlet of the fifth heat exchanger, and the inlet of the copper oxide storage tank are connected in sequence. The second compressor is used to compress the incoming air; the fourth heat exchanger is used to perform a primary heat exchange and temperature increase on the compressed air; the fifth heat exchanger is used to perform a secondary heat exchange and temperature increase on the incoming air before it enters the oxidation reactor; the second separator is used to separate the copper oxide and air after the oxidation reaction in the oxidation reactor, so that the copper oxide carrying the heat of the oxidation reaction is stored in the copper oxide storage tank after heat exchange in the fifth heat exchanger, and the air carrying the heat of the oxidation reaction is transferred to the second power generation system; In daytime mode, the second power generation system generates electricity based on a portion of the air carrying the heat of the oxidation reaction, while another portion of the air carrying the heat of the oxidation reaction passes through the fourth heat exchanger and the first heat exchanger to provide the solar reactor with the heat required for the decomposition of copper oxide. In night mode, the second power generation system generates electricity from a portion of the air carrying heat from the oxidation reaction, while the other portion of the air carrying heat from the oxidation reaction is heated by the fourth heat exchanger to provide heat for the third power generation system to generate electricity.

6. The concentrated solar copper chain power generation system according to claim 5, characterized in that, The second power generation system includes: a second turbine and a second generator; The first outlet of the second separator is connected to the input end of the second turbine; the first output end of the second turbine is connected to the second generator; and the second output end of the second turbine is connected to the second inlet of the fourth heat exchanger. The second turbine is used to expand and do work by partially expanding the air carrying the heat of the oxidation reaction, so that the second generator can output electrical energy.

7. The concentrated solar copper chain power generation system according to claim 5, characterized in that, The third power generation system includes: a sixth heat exchanger, a third turbine, a third generator, a second condenser, and a second pump; The first inlet of the sixth heat exchanger is connected to the second outlet of the fourth heat exchanger; the first outlet of the sixth heat exchanger is connected to the input end of the third turbine; the first output end of the third turbine is connected to the third generator; the second output end of the third turbine is connected to the second pump through the second condenser; the output end of the second pump is connected to the second inlet of the sixth heat exchanger. The sixth heat exchanger is used to exchange heat with the second working fluid using another portion of air carrying the heat of the oxidation reaction; the third turbine is used to expand and do work based on the second working fluid after heat exchange, so that the third generator outputs electrical energy; the second condenser is used to condense the second working fluid after expansion and work; the second pump is used to pressurize the condensed second working fluid, so that the pressurized second working fluid enters the sixth heat exchanger.

8. The concentrated solar copper chain power generation system according to claim 1, characterized in that, The solid material also includes copper oxide that has not undergone decomposition in the solar reactor.

9. The concentrated solar copper chain power generation system according to claim 7, characterized in that, The second working fluid is an organic liquid.

10. The concentrated solar copper chain power generation system according to claim 4, characterized in that, The first working medium is water.

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