CN108759120B - Photochemical and thermochemical combined energy storage device - Google Patents

Photochemical and thermochemical combined energy storage device Download PDF

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CN108759120B
CN108759120B CN201810408096.3A CN201810408096A CN108759120B CN 108759120 B CN108759120 B CN 108759120B CN 201810408096 A CN201810408096 A CN 201810408096A CN 108759120 B CN108759120 B CN 108759120B
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heat
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刘启斌
郭少朋
方娟
刘泰秀
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Institute of Engineering Thermophysics of CAS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/003—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using thermochemical reactions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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Abstract

A photochemical and thermochemical combination energy storage device comprising: a solar condenser for condensing sunlight; the light ray frequency divider divides the light collected by the solar condenser into two beams; the photochemical reactor is used for leading the photons which are separated by the light divider and participate in the photochemical reaction into the photochemical reactor, so that the photochemical reactant in the photochemical reactor is subjected to isomerization reaction, and the energy is stored in a chemical bond; and the photons which are separated by the light beam frequency divider and do not participate in the photochemical reaction are led into the thermochemical reactor, so that thermochemical reaction is carried out on thermochemical reactants in the thermochemical reactor, and the energy is stored in chemical energy. The energy storage device combining photochemistry and thermochemistry respectively utilizes photons of solar energy with different frequencies, wherein high-energy photons are subjected to photochemical reaction to directly store light energy in a chemical bond, and low-energy photons enter a thermochemical reactor to be firstly converted into heat energy and then converted into chemical energy to be stored, so that the full-spectrum high-efficiency energy storage is realized.

Description

Photochemical and thermochemical combined energy storage device
Technical Field
The invention belongs to the field of solar energy storage, and particularly relates to an energy storage device combining photochemistry and thermochemistry.
Background
The development of photovoltaic and photothermal technologies is limited by the instability of solar energy, and the development of a solar heat storage technology with high efficiency and long storage time is of great significance. Common energy storage methods are sensible heat, latent heat and chemical energy storage. Different from sensible heat and latent heat energy storage, chemical energy storage not only can realize the conversion and the storage of light energy, more has density height, convenient transportation and controllable use potentiality concurrently.
The solar thermochemical energy storage is to convert solar energy into heat energy, provide reaction heat of endothermic reaction, and cause reactants to undergo cracking or reforming reaction to generate synthesis gas under the action of a catalyst, so that the solar energy is stored in the chemical energy of the synthesis gas.
Solar thermochemical energy storage presents two problems: (1) solar energy is stored in a chemical energy form and undergoes two times of energy conversion, solar energy is firstly converted into heat energy, and the heat energy is converted into chemical energy, so that irreversible loss in the energy conversion and storage processes is increased; (2) the storage of the solar photons with different energies in one view does not meet the principle of grade-to-mouth and gradient utilization in the energy utilization process.
The energy grade, i.e., the quality of the energy, is proposed by Ishida to represent the maximum working capacity of different energies, and is defined by the formula
Figure BDA0001645438350000011
In the formula, Δ H represents a change in energy, and Δ E represents the maximum work that can be performed by the change in energy of Δ H.
Solar energy molecule isomerism heat storage is that solar photons irradiate organic molecules with photoresponse to enable the organic molecules to generate isomerism reaction, a low-energy stable structure is converted into a high-energy metastable state structure, and energy level differences of different structures can be used for storing solar energy. The process directly stores solar energy in chemical bonds, reduces the process of converting the solar energy into heat energy, and reduces irreversible loss.
However, the solar molecular heterogeneous heat storage can only utilize a part of photons with high energy, and cannot utilize photons with low energy, so that the utilization rate of solar energy photons is low, and the development of solar energy photochemical energy storage is hindered.
Disclosure of Invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a photochemical and thermochemical combination energy storage device to address at least one of the above problems.
The invention is realized by the following technical scheme:
according to a first aspect of the present invention, there is provided a photochemical and thermochemical combination energy storage device comprising: a solar condenser for condensing sunlight; the light ray frequency divider divides the light collected by the solar condenser into two beams; the light ray frequency divider is used for dividing the light rays into a plurality of photons, and the photons are divided into a plurality of photons by the light ray frequency divider; and the photons which are not involved in the photochemical reaction and are separated by the light divider are led into the thermochemical reactor, so that the thermochemical reactants in the thermochemical reactor are subjected to the thermochemical reaction, and the energy is stored in the chemical energy.
Preferably, the condenser is a parabolic trough solar condenser, a tower solar condenser, a dish solar condenser, a fresnel condenser or a compound parabolic condenser.
Preferably, the light ray divider is a single layer of optical glass, a double layer of optical glass or a coating.
Preferably, the thermochemical reactant is methanol, methane, a mixture of methanol and water, a mixture of methane and water or dimethyl ether.
Preferably, the photochemical reactant is norbornadiene and its derivatives, azobenzene and its derivatives, or an organometallic compound.
According to a second aspect of the present invention, there is provided a solar full spectrum energy storage system, comprising: the solar energy storage section adopts the energy storage device combining photochemistry and thermochemistry, and further comprises: the thermochemical preheater is positioned in front of the thermochemical reactor, photons which are separated by the light beam frequency divider and do not participate in the photochemical reaction enter the thermochemical preheater, and the thermochemical reactants are preheated and then sent into the thermochemical reactor for reaction; the thermochemical energy release section comprises the following components in sequence: a separator connected with the thermochemical reactor to separate the thermochemical products, wherein one part of the thermochemical products is subjected to energy release reaction, and the other part of the thermochemical products is stored; a power generation device for generating power by using the partial thermochemical product separated by the separator; the lithium bromide double-effect refrigerator utilizes the smoke generated by the power generation device for refrigeration; the heat supply heat exchanger is used for exchanging heat by utilizing tail gas of the lithium bromide double-effect refrigerating machine so as to supply heat or hot water for users; and the photoisomerization heat release section comprises a photochemical heat release device which is connected with the photochemical reactor and releases energy in the photoreaction products.
Preferably, the photochemical heat emitter is used for cooling or heating.
According to a third aspect of the present invention, there is provided a solar full spectrum energy storage system, comprising: the energy storage device combining photochemistry and thermochemistry further comprises: the thermochemical preheater is positioned in front of the thermochemical reactor, photons which are separated by the light beam frequency divider and do not participate in the photochemical reaction enter the thermochemical preheater, and the thermochemical reactants are preheated and then sent into the thermochemical reactor for reaction; the photochemical product storage tank is used for storing the photochemical product generated by the photochemical reactor; the flow divider is connected with the photochemical product storage tank and used for separating the photochemical products and sending the photochemical products to the two photochemical heat radiators, wherein one photochemical heat radiator releases energy to supply cold or heat for a user, and the other photochemical heat radiator provides energy for a thermochemical reaction; a thermochemical reactor which is connected with the thermochemical reactor and a photochemical heat emitter and uses the heat emitted by the photochemical heat emitter to make the thermochemical reactant which is not completely reacted in the thermochemical reactor react to generate a thermochemical product; and a separator for separating the thermochemical product, partially performing an energy-releasing reaction, and storing the rest in a thermochemical product storage tank.
Preferably, the thermal chemical energy discharge section is a gas turbine distributed co-production system or a fuel cell or a hydrogen storage tank.
Preferably, when the irradiation is sufficient, the thermochemical reactor works to convert the thermochemical reactant into the thermochemical product, and the photochemical product enters a photochemical heat releaser to supply heat or cold for users;
when the irradiation is insufficient, the thermochemical reactor can not work normally, at the moment, the photochemical reactor still works, one part of the photochemical product enters the photochemical heat releaser to release heat, so that the thermochemical reactor works, and the thermochemical reactant is converted into the thermochemical product.
According to the technical scheme, the energy storage device combining photochemistry and thermochemistry has at least one of the following beneficial effects:
(1) the high-frequency part of photons of the solar energy are used for molecular-level photo-isomerism reaction, and the photons with low frequency are converted into heat energy for thermochemical reaction, so that the condition that the light energy which is close to 100% of work-doing capacity theoretically is converted into low-grade heat energy is avoided, and compared with single photochemical reaction, the frequency domain of solar energy storage is improved, and full-spectrum energy storage is realized;
(2) when the solar energy is insufficient at night or the solar energy is insufficient, the heat energy stored in the photochemical reactor can promote the thermochemical reaction to continuously generate industrial raw materials or supply cold and heat, so that the fluctuation of the system is reduced;
(3) the light isomerization reaction can be carried out in the shade, and when the irradiation is lower than the light-heat design irradiation, the energy can still be stored;
(4) the long-time energy storage and thermochemical long-time energy storage in the optical isomerism of the system are combined, the proportion of light entering the photochemical reactor and the photochemical reactor can be adjusted according to different requirements, and the flexibility of the system is improved.
Drawings
FIG. 1 is a schematic structural diagram of a photochemical and thermochemical combination energy storage device according to a first embodiment of the invention;
FIG. 2 is a schematic structural diagram of a solar full spectrum energy storage system according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a solar full spectrum energy storage system according to a third embodiment of the present invention.
[ description of main reference symbols of embodiments of the invention ] in the drawings
A-thermochemical reactant B-thermochemical product
C-photochemical reactant D-photochemical product
0A-thermochemical reactant storage tank and 0B-thermochemical product storage tank
0C-photochemical reactant storage tank and 0D-photochemical product storage tank
11-condenser 12-ray frequency divider
13-thermochemical preheater 21-concentrator
22-light divider 23-thermochemical reactor
24-photochemical reactor 31-separator
32-gas turbine 33-lithium bromide double-effect refrigerator
34-heat exchanger 41-photochemical heat releaser
42-separator 43-thermochemical reactor
35-thermal chemical energy release section
Detailed Description
The invention provides a photochemical and thermochemical combined energy storage device, which comprises: a solar condenser for condensing sunlight; the light ray frequency divider divides the light collected by the solar condenser into two beams; the light ray frequency divider is used for dividing the light rays into a plurality of photons, and the photons are divided into a plurality of photons by the light ray frequency divider; and the photons which are not involved in the photochemical reaction and are separated by the light divider are led into the thermochemical reactor, so that the thermochemical reactants in the thermochemical reactor are subjected to the thermochemical reaction, and the energy is stored in the chemical energy. The energy storage device combining photochemistry and thermochemistry respectively utilizes photons of solar energy with different frequencies, wherein high-energy photons are subjected to photochemical reaction to directly store light energy in a chemical bond, and low-energy photons enter a thermochemical reactor to be firstly converted into heat energy and then converted into chemical energy to be stored, so that the full-spectrum high-efficiency energy storage is realized.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
In a first exemplary embodiment of the present invention, a photochemical and thermochemical combination energy storage device is provided. FIG. 1 is a schematic structural diagram of a photochemical and thermochemical combination energy storage device according to a first embodiment of the present invention. As shown in FIG. 1, the photochemical and thermochemical combination energy storage device of the present invention comprises: a solar condenser 21 for condensing sunlight; the light ray frequency divider 22 divides the gathered light rays into two parts, photons with high energy enter the photochemical reactor, and photons with low energy enter the thermochemical reactor; a photochemical reactor 24 in which photochemical reactants undergo an isomerization reaction, storing high-energy photons in chemical bonds; and a thermochemical reactor 23, in which photons having low energy are first converted into heat energy to provide reaction heat, and the reaction products in the thermochemical reactor 23 are reacted to store energy in chemical energy of the products.
The photochemical and thermochemical combination of the energy storage device of the present embodiment will be described in detail below.
In the embodiment, the condenser 21 is a parabolic trough type solar condenser, but the invention is not limited thereto. In the present invention, the condenser 21 may be a tower type solar condenser, a dish type solar condenser, a fresnel type condenser, a compound parabolic condenser, or the like.
The optical divider 22 is a single or double layer optical glass, and may be a coating, such as an ion-alternating Nb coating2O5And SiO2Thin layer, and the reflection and absorption spectral ranges can be freely selected by adjusting the coating thickness of each layer.
In the thermochemical reactor 23, the raw material A is methanol, methane, methanol and water, methane and water, dimethyl ether or the like. The thermochemical reaction is a cracking reaction or a reforming reaction, and the generated product B is a mixture or a compound. The proper thermochemical reaction raw materials are selected according to the condensing ratio of different condensing lenses 21. For example, when tower solar energy is selected to ensure that the condensation ratio is high and the thermochemical reaction can reach higher temperature, the raw material A can be reformed by selecting methane and water; if the parabolic trough solar condenser with low light condensation ratio is selected, the heat collection temperature is 150-300 ℃, and methanol can be selected as the raw material A at the moment to perform cracking reaction to generate synthesis gas B (CO and H)2)。
Photochemical reactor 24 performs a photo-isomerization reaction, including molecular and geometric isomerization, and may also be a bimolecular addition reaction. The reactant C is polynorbornene and derivatives thereof, azobenzene and derivatives thereof, and organic metal compound type or novel nano-structure light and heat storage material.
It should be noted that the following device, the bracket, and the thermal chemical reactor are known to those skilled in the art to reduce heat loss by using evacuated solar collector tubes, and are not described in detail.
Thus, the energy storage device combining photochemistry and thermochemistry according to the first embodiment of the present invention has been described.
In a second exemplary embodiment of the invention, a solar full spectrum energy storage system is also provided. Fig. 2 is a schematic structural diagram of a solar full-spectrum energy storage and release system. As shown in fig. 2, the solar full spectrum energy storage system of the present embodiment includes:
the storage tank comprises a thermochemical reaction raw material A storage tank 0A, a thermochemical product B storage tank 0B, a photochemical reactant C storage tank 0C and a photochemical product storage tank 0D; a solar energy storage section comprising: a solar condenser 21 for condensing sunlight; the light divider 22 divides the gathered light into two parts, photons with high energy enter the photochemical reactor, and photons with low energy enter the thermochemical preheater and the thermochemical reactor; a photochemical reactor 24, wherein high-energy photons are reflected into the photochemical reactor 24 to promote the photochemical reactant C to generate an isomerization reaction to generate a product D, and the light energy is stored in a chemical bond; the thermochemical preheater 13 is used, A in the storage tank 0A enters the thermochemical preheater 13, and photons with low energy are converted into heat energy to preheat A; the thermochemical reactor 23 is used for enabling the preheated thermochemical reactant A to enter the thermochemical reactor 23 for thermochemical reaction, and storing photons with low energy in chemical energy of the product B; the thermochemical energy release section comprises the following components in sequence: a separator 31 for separating the thermochemical product B, wherein part of the thermochemical product B enters a thermochemical energy release section for energy release reaction, and the rest of the thermochemical product B is stored in a thermochemical product storage tank 0B; a micro combustion engine 32 for burning the product B in the micro combustion engine to generate electricity; the lithium bromide double-effect refrigerator 33 is used for refrigerating the smoke gas discharged from the micro combustion engine 32 in the lithium bromide double-effect refrigerator 33; the heat supply heat exchanger 34 is used for exchanging heat of tail gas from the refrigerator 33 by the heat exchanger 34, so that heat is supplied to a user or hot water is supplied to the user; and a photo-isomerism heat release section comprising a photochemical heat release device 41 for releasing energy in the photo-reaction product D to supply heat to a user or hot water.
The following describes each component of the solar full-spectrum energy storage and release system in detail.
N (N is more than or equal to 1) preheaters can be connected in series according to the temperature requirement of entering the thermochemical reactor 23.
The separator 31 divides the thermochemical product B into two parts, one part is used in the distributed cogeneration system of the micro-combustion engine according to the user load, the surplus part is stored in the thermochemical reaction gas storage tank 0B, and when the product B is insufficient, the B in the thermochemical reaction gas storage tank 0B enters the system for supplementation.
The photochemical heat emitter 41 can be adjusted for cooling or heating according to the user load. In summer, when the cooling load of a user is large, the heat released by the product D from the photoreactor in the photochemical energy releaser 41 drives the lithium bromide double-effect refrigerator to refrigerate; in winter, when the heat load of the user is large, the product D from the photoreactor directly supplies heat or provides hot water for the user by the heat released by the photochemical energy releaser 41.
When sunlight does not reach the designed irradiation of the thermochemical reaction in the daytime, the thermochemical reaction cannot occur, the solar energy can be stored by the optical isomerism at the moment, and the solar energy can be stored to the maximum extent by the combination of the photochemical molecular isomerism heat storage and the thermochemical.
When the electric load of the user is small at night, the enthalpy value of the smoke at the outlet of the micro-combustion engine 32 is small, the cold quantity and the heat quantity generated by the waste heat of the smoke cannot meet the requirements of the user, and the photochemical heat radiator supplies cold or heat to the user. Make up the not enough of single thermochemistry storage ability, made the system operation more nimble.
In the embodiment, the thermochemical heat release section is a gas turbine distributed co-production system, but the invention is not limited thereto, and the thermochemical heat release section may be a fuel cell, or the generated product B may be stored as a chemical raw material or a fuel.
It is noted that the material pumps, valves, tracking devices, supports, etc. required for the system are well known to those skilled in the art and are not described in detail.
In this embodiment, solar energy preheating equipment is adopted for preheating thermochemical reaction raw materials. However, the system is not limited to this, and the tail gas after supplying heat to the user and the flue gas from the thermochemical reactor 23 can preheat the thermochemical reaction raw material.
Thus, the introduction of the solar full-spectrum energy storage system in the second embodiment of the invention is completed.
In a third exemplary embodiment of the invention, a solar full spectrum energy storage system is also provided. Fig. 3 is a schematic structural diagram of a solar full-spectrum energy storage and release system. As shown in fig. 3, the present embodiment is different from the second embodiment in that: the product D generated by the photo-reaction is divided into two parts in the flow divider 42, one part is sent to the photochemical heat emitter 41 for cooling or heating, and the other part is sent to the photochemical heat emitter 43 for emitting heat energy to provide reaction heat for the thermochemical reactor 25, so as to promote the thermochemical process.
Specifically, when the solar radiation is insufficient to cause the thermochemical reaction, and the storage capacity in the syngas storage tank 0B is insufficient, and the user has an electrical demand, the photochemical reaction can still proceed, the light energy stored in the photochemical reactor 24 is collected and released in the thermochemical heat emitter 43 to provide the heat of the endothermic reaction, so as to promote the thermochemical reaction in the thermochemical reactor 25 to generate more products B, and the products B release energy in the micro-combustion engine to output cold, heat and electricity.
In this embodiment, there is only one photochemical reactor 24, but the present invention is not limited thereto, and M (M.gtoreq.1) photochemical reactors 24 may be selected to be connected in series.
Depending on the user load, the separator 42 can adjust the amount of photochemical products entering the photochemical heat emitters 41 and 43.
It should be noted that the thermal chemical energy discharge section 35 micro-gas turbine distributed co-production system is replaced by a fuel cell system, so that the solar energy isomerization and thermal chemical combined full-spectrum energy storage and discharge system and the fuel cell coupled power generation system are formed.
The invention also provides a system for preparing hydrogen by using the full-spectrum energy storage and release system combining solar energy photo-isomerism and thermochemistry, wherein a reaction raw material A is a mixture of methanol and water, hydrogen and carbon dioxide are generated through a reforming reaction, and a thermochemistry heat release section 35 is changed into a separation, purification and storage device. The system can also produce various chemical products and raw materials, which are not listed here.
In addition, raw material pumps, valves, tracking devices, brackets and the like required by the system are well known to those skilled in the art, the preheating mode adopted by the system is that the solar preheating reactor preheats, those skilled in the art consider that the gas from the thermochemical reactor 23 preheats the raw material A, and the increase and decrease of the heat exchanger to utilize the waste heat as equivalent modification.
In summary, the present invention provides a photochemical and thermochemical combined energy storage device, comprising: a solar condenser for condensing sunlight; the light ray frequency divider divides the light collected by the solar condenser into two beams; the photochemical reactor is used for leading the photons which are separated by the light divider and participate in the photochemical reaction into the photochemical reactor, so that the photochemical reactant in the photochemical reactor is subjected to isomerization reaction, and the energy is stored in a chemical bond; and the photons which are separated by the light beam frequency divider and do not participate in the photochemical reaction are led into the thermochemical reactor, so that thermochemical reaction is carried out on thermochemical reactants in the thermochemical reactor, and the energy is stored in chemical energy. The energy storage device combining photochemistry and thermochemistry respectively utilizes photons of solar energy with different frequencies, wherein high-energy photons are subjected to photochemical reaction to directly store light energy in a chemical bond, and low-energy photons enter a thermochemical reactor to be firstly converted into heat energy and then converted into chemical energy to be stored, so that the full-spectrum high-efficiency energy storage is realized.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A photochemical and thermochemical combination energy storage device comprising:
a solar energy condenser (21) for condensing sunlight;
a light ray frequency divider (22) for dividing the light collected by the solar condenser (21) into two beams;
a photochemical reactor (24), wherein the photons which are separated by the light beam divider and participate in the photochemical reaction are guided into the photochemical reactor (24) to enable the photochemical reactant (C) to generate an isomerization reaction, and energy is stored in a chemical bond;
a first thermochemical reactor (23), wherein photons which are not involved in the photochemical reaction and are separated by the light divider are guided into the first thermochemical reactor (23), so that thermochemical reaction of a thermochemical reactant (A) is carried out, and energy is stored in chemical energy;
a photoisomerization exothermic section comprising a photochemical heat releaser (41) connected to the photochemical reactor (24) for releasing energy from the photoreaction product (D);
the thermochemical preheater (13) is positioned in front of the first thermochemical reactor (23), photons which are separated out by the light beam frequency divider (22) and do not participate in the photochemical reaction enter the thermochemical preheater, preheat the thermochemical reactant (A) and then send the thermochemical reactant into the first thermochemical reactor (23) for reaction; and
and a second thermochemical reactor (25) which is connected with the first thermochemical reactor (23) and one photochemical heat emitter and uses the heat emitted by the photochemical heat emitter to react the thermochemical reactant (A) which is not completely reacted in the first thermochemical reactor (23) to generate a thermochemical product (B).
2. Photochemical and thermochemical combined energy storage device according to claim 1, characterized in that the concentrator (21) is a parabolic trough solar concentrator, a tower solar concentrator, a dish solar concentrator, a fresnel concentrator or a compound parabolic concentrator.
3. Photochemical and thermochemical combination energy storage device as claimed in claim 1, characterized in that the light ray divider (22) is a single layer of optical glass, a double layer of optical glass or a coating.
4. The photochemistry and thermochemical combined energy storage device of claim 1 wherein the thermochemical reactant (a) is methanol, methane, a mixture of methanol and water, a mixture of methane and water or dimethyl ether.
5. The photochemically and thermochemically combined energy storage device according to claim 1, wherein the photochemical reactant (C) is norbornadiene and its derivatives, azobenzene and its derivatives, or an organometallic compound.
6. A solar full-spectrum energy storage and discharge system, comprising:
the photochemical and thermochemical combination energy storage device of claim 1,
a photochemical product storage tank (0D) for storing the photochemical product (D) generated by the photochemical reactor (24);
a flow divider (42) which is connected with the photochemical product storage tank (0D) and separates the photochemical product (D) and sends the photochemical product (D) to two photochemical heat radiators, wherein one photochemical heat radiator releases energy to supply cold or heat for users, and the other photochemical heat radiator provides energy for thermochemical reaction;
a separator (31) for separating the thermochemical product (B), partially discharging the energy, and storing the rest in a thermochemical product storage tank (0B).
7. The full spectrum solar energy storage system of claim 6,
the thermal chemical energy release section is a gas turbine distributed co-production system or a fuel cell or a hydrogen storage tank.
8. The full spectrum solar energy storage system of claim 6,
when the irradiation is sufficient, the first thermochemical reactor (23) works to convert the thermochemical reactant (A) into the thermochemical product (B), and the photochemical product (D) completely enters a photochemistry heat releaser to supply heat or cold for users;
when the irradiation is insufficient, the first thermochemical reactor (23) can not work normally, at the moment, the photochemical reactor (24) still works, a part of the photochemical product (D) enters the photochemical heat releaser to release heat, the second thermochemical reactor (25) works, and the thermochemical reactant (A) is converted into the thermochemical product (B).
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