CN108301927B - Solar high-temperature heat collection and storage gas turbine power generation device - Google Patents

Solar high-temperature heat collection and storage gas turbine power generation device Download PDF

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Publication number
CN108301927B
CN108301927B CN201611090624.2A CN201611090624A CN108301927B CN 108301927 B CN108301927 B CN 108301927B CN 201611090624 A CN201611090624 A CN 201611090624A CN 108301927 B CN108301927 B CN 108301927B
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heat
solar
temperature
chemical
collector
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CN108301927A (en
Inventor
肖刚
周鑫
刘焕磊
陈金利
杨天锋
倪明江
骆仲泱
程乐鸣
高翔
岑可法
方梦祥
周劲松
施正伦
王勤辉
王树荣
余春江
王涛
郑成航
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Zhejiang University ZJU
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Zhejiang University ZJU
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Priority to CN2016106685459 priority
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Priority claimed from US15/587,524 external-priority patent/US10494996B2/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02CGAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/08Heating air supply before combustion, e.g. by exhaust gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02CGAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02CGAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
    • F02C6/14Gas-turbine plants having means for storing energy, e.g. for meeting peak loads
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/003Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using thermochemical reactions
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14Thermal energy storage

Abstract

The invention relates to the technical field of energy, and discloses a solar high-temperature heat collection and storage gas turbine power generation device, which comprises: the system comprises a combustion chamber, a solar heat collector, a chemical heat storage tank, a three-way valve A and a three-way valve B; the chemical heat storage tank is provided with a high-temperature side and a low-temperature side; one outlet of the three-way valve A is connected with a compressed air inlet of the solar heat collector, the other outlet of the three-way valve A is connected with an inlet of the three-way valve B, one outlet of the three-way valve B is connected with the low-temperature side of the chemical heat storage tank, and the other outlet of the three-way valve B is connected with an inlet of the combustion chamber; the compressed air outlet of the solar heat collector is connected with the high-temperature side of the chemical heat storage tank and the inlet of the combustion chamber, and the low-temperature side of the chemical heat storage tank is also connected with the inlet of the combustion chamber. The solar high-temperature heat collection and storage gas turbine power generation device has less fossil fuel consumption, longer service life and better on-grid power quality.

Description

Solar high-temperature heat collection and storage gas turbine power generation device
The invention claims the priority of Chinese patent application with the application number of CN 201610668545.9, the application date of 2016, 8, 12 and the name of a high-temperature heat collection and storage gas turbine power generation method and device.
Technical Field
The invention relates to the technical field of energy sources, in particular to a solar high-temperature heat collection and storage gas turbine power generation device.
Background
Total amount of solar radiation of about 1.7X 1017W, wherein China accounts for about 1% (1.8X 10)15W, equivalent to 1.9 trillion tons of standard coal per year), is about 700 times of the total annual energy consumption of China at present, and solar energy has great development potential. The utilization of solar energy, which is a clean and pollution-free renewable energy source, has important significance for reducing the current fossil energy, environmental pollution pressure and the like.
The solar power generation technology mainly comprises a photovoltaic mode and a photo-thermal mode. Because the solar energy flow density is low and the energy fluctuation is large, the impact on a power grid is large by adopting photovoltaic grid-connected power generation, and the cost is too high if a storage battery is adopted for storing electricity.
The solar thermal power generation technology is a technology for converting solar energy into heat energy after being focused and then performing thermal power conversion to generate power. Meanwhile, the gas turbine power generation system has a series of advantages of high efficiency, quick start, good peak regulation performance, short construction period, small occupied area, low water consumption, low maintenance cost and the like. The gas turbine power generation system is applied to a solar thermal power generation technology, compressed air in the gas turbine is heated by solar energy and then enters the combustion chamber for combustion supporting to generate power, and consumption of fossil fuel can be greatly reduced.
However, as previously mentioned, due to the relatively low solar energy flux density, the energy fluctuation is relatively large. When the sunlight is strong, the temperature of the heat collector can be too high, and the operation stability of the heat collector is reduced. When the sunlight is insufficient, the temperature of the compressed air entering the combustion chamber is insufficient, and the technical effect of saving energy consumption is difficult to achieve.
Disclosure of Invention
The invention aims to provide a solar high-temperature heat collection and storage gas turbine power generation device which has the advantages of less fossil fuel consumption, longer service life and better on-grid power quality.
In order to solve the above technical problem, the present invention provides a solar energy high temperature heat collection and storage gas turbine power generation device, comprising: the system comprises a combustion chamber, a solar heat collector, a chemical heat storage tank, a three-way valve A and a three-way valve B;
the chemical heat storage tank is provided with a high-temperature side and a low-temperature side;
one outlet of the three-way valve A is connected with a compressed air inlet of the solar heat collector, the other outlet of the three-way valve A is connected with an inlet of the three-way valve B, one outlet of the three-way valve B is connected with the low-temperature side of the chemical heat storage tank, and the other outlet of the three-way valve B is connected with an inlet of the combustion chamber;
the compressed air outlet of the solar heat collector is connected with the high-temperature side of the chemical heat storage tank and the inlet of the combustion chamber, and the low-temperature side of the chemical heat storage tank is also connected with the inlet of the combustion chamber;
when the solar energy is sufficient, air enters the solar heat collector through the three-way valve A, is heated and increases the temperature, one part of the air from the solar heat collector enters the chemical heat storage tank, sequentially passes through the chemical heat storage substances on each layer from the high-temperature side to the low-temperature side, and the other part of the air enters the combustion chamber for auxiliary combustion;
when solar energy is insufficient, air enters the chemical heat storage tank through the three-way valve A and the three-way valve B, sequentially passes through the chemical heat storage substances on each layer from the low-temperature side to the high-temperature side, is heated by heat released by the chemical heat storage tank, and then enters the combustion chamber for auxiliary combustion.
Currently, a variety of heat storage methods are widely used. According to the storage form of energy, the following three types can be classified: sensible heat storage, latent heat storage, and chemical heat storage.
Sensible heat storage is the storage or release of heat by utilizing the rise or fall of the temperature of the heat storage material itself. The heat storage mode has the simplest principle, the most mature technology and the most extensive application in a plurality of heat storage modes, but the heat storage density is relatively low and the volume is large.
Latent heat storage is heat storage by utilizing the principle that a heat storage medium absorbs or emits latent heat of phase change in the processes of solidification/melting, condensation/gasification, desublimation/sublimation and other forms of phase change. The mode has the advantages of large heat storage density, small temperature fluctuation range in the heat charging and discharging process and the like, but the phase-change material cannot be used as a heat-carrying medium, an independent heat exchanger needs to be designed in the system, and the phase-change material can corrode the wall of the container.
Chemical heat storage refers to storing heat energy using reaction heat of a reversible chemical reaction, and when the reaction heat is higher than an equilibrium temperature of the reversible reaction, an endothermic heat storage reaction occurs, and when the reaction heat is lower than the equilibrium temperature of the reversible reaction, an exothermic reaction occurs. The storage density of chemical heat storage is highest among the three modes.
Compared with the prior art, the solar high-temperature heat collection and storage gas turbine power generation device has the advantage of high heat storage density by utilizing the chemical heat storage of the chemical heat storage tank, and simultaneously, the solar energy can be stored in the chemical heat storage tank, so that the influence of the energy fluctuation of the solar energy on a system is reduced, the power generation stability of the system is improved, the power generation time is prolonged, and the power quality of the power on the internet is improved. Through the multi-energy complementation of fuel, solar energy, chemical heat storage and the like, the energy can be utilized in a gradient manner, the system efficiency is improved, and the consumption of fossil fuel is reduced, so that the economic efficiency is better. Through solar collector coupling chemistry heat storage jar, stabilized the temperature fluctuation of solar collector export, prevented solar collector overtemperature, guaranteed solar collector's safety and stability operation, prolonged life.
In solar thermal power generation systems, one key component is the solar collector. The function of the solar heat collector is to convert the focused sunlight into heat energy. Because the solar thermal collector works in severe environments such as high temperature, high pressure, uneven high-intensity solar radiation and the like, damage and even safety accidents are easily caused by improper design or control. Stable and safe operation of the solar collector is therefore very important. Preferably, an air heat collecting pipe is arranged in the solar heat collector, and the periphery of the air heat collecting pipe is filled with heat collector chemical heat storage substances. When the temperature in the solar heat collector is higher than the reaction balance temperature of the chemical heat storage substances of the heat collector, the chemical heat storage substances of the heat collector react to absorb redundant heat and store the redundant heat into chemical energy, and when the temperature in the solar heat collector is lower than the reaction balance temperature of the chemical heat storage substances of the heat collector, the chemical heat storage substances of the heat collector perform exothermic reaction to release the chemical energy, heat is exchanged for air in the air heat collecting tube, the air is heated to high temperature, the deficiency of solar energy is made up, and the temperature of the solar heat collector is stabilized. Therefore, the chemical heat storage substances of the heat collector are filled around the air heat collecting pipe, and the service life of the solar heat collector can be further prolonged.
Further, preferably, the lower part of the air heat collecting pipe is also filled with a heat collector chemical heat storage substance;
the air heat collecting pipes are spirally distributed in the solar heat collector;
or the air heat collecting pipes are radially distributed outwards from the center of the solar heat collector;
or the air heat collecting pipes are distributed along the circumferential direction of the solar heat collector.
The air heat collecting pipes distributed spirally can increase the heat contact area and improve the heat transfer and heat conduction efficiency, and the air heat collecting pipes distributed from the center to the outer side are easier to transfer heat and design the matched equipment, so that the cost can be reduced. The air heat collecting pipes distributed along the circumferential direction of the solar heat collector can utilize the space of the solar heat collector to the maximum extent, and the density of the air heat collecting pipes is improved.
Preferably, the solar high-temperature heat collecting and storing gas turbine power generation device further includes: the system comprises a turbine and a heat regenerator, wherein a hot fluid side and a cold fluid side are arranged in the heat regenerator;
the outlet of the combustion chamber is connected with the inlet of a turbine, and the outlet of the turbine is connected with the hot fluid side inlet of a heat regenerator;
an outlet on the cold fluid side is connected with an inlet of the three-way valve A;
the tail gas from the turbine enters the hot fluid side for heating the air at the cold fluid side.
After the heat regenerator is arranged and added, tail gas exhausted from the turbine flows through the heat fluid side of the heat regenerator, and air passing through the cold fluid side can be heated by utilizing the heat of the tail gas, so that the heat of the tail gas can be utilized more efficiently, the total energy consumption of the solar high-temperature heat collection and storage gas turbine power generation device is further reduced, and the energy utilization efficiency is improved.
Further, preferably, the solar high-temperature heat collecting and storing gas turbine power generation device further comprises: the waste heat utilization device is connected with an outlet on the heat fluid side of the heat regenerator;
the tail gas of the turbine enters a waste heat utilization device after passing through the hot fluid side, and heat energy is further recovered.
The tail gas reheated by the heat regenerator is recycled by the waste heat utilization device, so that the heat of the tail gas is utilized in a cascade manner, and the utilization efficiency of energy is improved better.
Further, preferably, the solar high-temperature heat collecting and storing gas turbine power generation device further comprises: an induced draft pipeline and an induced draft fan; the solar heat collector is arranged in an open manner;
the induced draft pipeline is connected with the solar heat collector and is connected to the inlet of the waste heat utilization device, and the induced draft fan is arranged at the outlet of the waste heat utilization device. When the induced draft fan works, air enters the solar heat collector from the environment and then enters the waste heat utilization device through the induced draft pipeline.
The circulating air improves the heat transfer effect in the solar collector. The redundant heat can be introduced into the waste heat utilization device, and the energy efficiency is improved.
Moreover, when the solar thermal collector is filled with the chemical heat storage substances, the circulating air quantity is controlled by the draught fan, so that the heat absorption and heat release reaction rates of the chemical heat storage substances can be better controlled, and better heat storage and heat release effects are obtained.
In addition, preferably, the solar high-temperature heat collection and storage gas turbine power generation device further comprises a gas compressor and a power generator, wherein an outlet of the gas compressor is connected with an inlet on the side of the cold fluid and used for inputting compressed air to the side of the cold fluid; the generator is connected with the compressor, and the compressor is connected with the turbine.
The compressor is used as a power consumption part and can compress and convey atmospheric air. When the turbine is connected with the compressor, the work done by the turbine can provide part of the power for the compressor through the connected main shaft, so that the system does not need to provide additional power for the compressor. Moreover, since the temperature of the exhaust gas directly discharged from the turbine is still high, the reliability of the direct connection between the generator and the turbine is not good, and the service life of the generator can be prolonged better by connecting the generator to the turbine through the compressor.
Preferably, the solar high-temperature heat collecting and storing gas turbine power generation device further includes: a throttle valve;
the solar heat collector is connected with the inlet of the combustion chamber through a throttle valve. The air flow from the solar collector into the combustion chamber can be controlled by means of a throttle valve.
Through the aperture of adjusting the choke valve, can realize the flow distribution to the air when passing through choke valve and chemical heat storage tank for still can guarantee stable air supply temperature under the solar energy state of difference.
Preferably, at least two kinds of chemical heat storage substances are provided in the chemical heat storage tank, and the reaction equilibrium temperature of the chemical heat storage substances decreases in order from the high temperature side to the low temperature side of the chemical heat storage tank. When a plurality of chemical heat storage substances are arranged, temperature gradients can be formed in the chemical heat storage tanks in sequence. When air sequentially passes through the chemical heat storage substances through the pipelines in the chemical heat storage tank, the air and the chemical heat storage substances can be subjected to temperature exchange in sequence, so that the temperature change rate of the air is improved, and the energy storage effect of the chemical heat storage tank is improved.
Preferably, the chemical heat storage substance forms a plurality of chemical heat storage layers in a direction from the high temperature side toward the low temperature side, and the chemical heat storage layers are spaced apart from each other. The spacing distribution can prevent interference and heat exchange among different layers, and further can better maintain the temperature gradient.
It is worth mentioning that in the present invention, the chemical heat storage material may be one or more of carbonate, alkali, metal oxide, etc., wherein the metal oxide may include one or more of oxides of Cr, Li, Mg, Pb, Pt, Sb, Mn, U, Ba, Co, Rh, Cu, Fe, V. Taking carbonate as an example, when the temperature is higher than the equilibrium temperature of the decomposition synthesis reaction of the carbonate, the carbonate is decomposed and absorbs heat; otherwise, carbonate is synthesized, releasing heat. Taking metal oxide as an example, when the temperature is higher than the oxidation-reduction reaction equilibrium temperature of the metal oxide, a reduction reaction occurs, heat is absorbed, and oxygen is released; when the temperature is lower than the redox reaction equilibrium temperature of the metal oxide, an oxidation reaction occurs, absorbing oxygen, while releasing heat.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of a solar high-temperature heat collection and storage gas turbine power generation device;
FIG. 2 is a schematic view of a solar collector according to a first embodiment of the invention;
FIG. 3 is a schematic diagram of a second embodiment of the solar high-temperature heat collection and storage gas turbine power generation device;
FIG. 4 is a schematic view of a third embodiment of the solar high-temperature heat collecting and storing gas turbine power generation device of the present invention;
FIG. 5 is a schematic view of a fourth embodiment of the present invention of a solar high temperature heat collecting and storing gas turbine power generation device;
FIG. 6 is a schematic view of a solar high-temperature heat collecting and storing gas turbine power generation device according to a fifth embodiment of the present invention;
FIG. 7 is a schematic view of a sixth embodiment of the present invention of a solar high temperature heat collecting and storing gas turbine power generation device;
fig. 8 is a schematic view of a chemical heat storage tank according to a seventh embodiment of the present invention;
fig. 9 is a schematic view of a solar collector according to an eighth embodiment of the present invention.
Description of reference numerals:
1, an air compressor; 2-a turbine; 3-a heat regenerator; 4-three-way valve A; 5, a waste heat utilization device; 6-induced draft fan; 7-a solar heat collector; 8-a chemical heat storage tank; 9-chemical heat storage layer; 10-three-way valve B; 11-a throttle valve; 12-a combustion chamber; 13-a generator; 14-compressed air inlet of solar heat collector; 15-an induced draft pipeline connector; 16-air heat collecting pipes; 17-solar lighting port; 18-collector chemical heat storage; 19-compressed air outlet of solar collector.
Detailed Description
Implementation mode one
A first embodiment of the present invention provides a solar high-temperature heat collection and storage gas turbine power generation device, which is shown in fig. 1 and 2 in combination, and includes: the combustion chamber 12, the solar heat collector 7, the chemical heat storage tank 8, the three-way valve A4 and the three-way valve B10;
the chemical heat storage tank 8 has a high temperature side and a low temperature side;
one outlet of the three-way valve A4 is connected with the compressed air inlet 14 of the solar heat collector, the other outlet is connected with the inlet of the three-way valve B10, one outlet of the three-way valve B10 is connected with the low-temperature side of the chemical heat storage tank 8, and the other outlet is connected with the inlet of the combustion chamber 12;
a compressed air outlet 19 of the solar heat collector is connected with the high-temperature side of the chemical heat storage tank 8 and the inlet of the combustion chamber 12, and the low-temperature side of the chemical heat storage tank 8 is also connected with the inlet of the combustion chamber 12;
when the solar energy is sufficient, air enters the solar heat collector 7 through the three-way valve A4, the air is heated and the temperature is increased, one part of the air from the solar heat collector 7 enters the chemical heat storage tank 8, the air sequentially passes through each layer of chemical heat storage substances from the high-temperature side to the low-temperature side, and the other part of the air enters the combustion chamber 12 for auxiliary combustion;
when solar energy is insufficient, air enters the chemical heat storage tank 8 through the three-way valve a4 and the three-way valve B10, sequentially passes through the layers of chemical heat storage substances from the low-temperature side to the high-temperature side, is heated by heat released by the chemical heat storage tank 8, and then enters the combustion chamber 12 for auxiliary combustion.
Those skilled in the art can utilize the hot combustion gases from the combustion chamber 12 in accordance with the present teachings to perform a variety of functions. For example, high temperature flue gas may enter a turbine to do work, and then drive a generator connected to the turbine to generate electricity, and since the specific flue gas using method and electricity generating method are prior art in the field, they are not further shown in fig. 1.
Currently, a variety of heat storage methods are widely used. According to the storage form of energy, the following three types can be classified: sensible heat storage, latent heat storage, and chemical heat storage.
Sensible heat storage is the storage or release of heat by utilizing the rise or fall of the temperature of the heat storage material itself. The heat storage mode has the simplest principle, the most mature technology and the most extensive application in a plurality of heat storage modes, but the heat storage density is relatively low and the volume is large.
Latent heat storage is heat storage by utilizing the principle that a heat storage medium absorbs or emits latent heat of phase change in the processes of solidification/melting, condensation/gasification, desublimation/sublimation and other forms of phase change. The mode has the advantages of large heat storage density, small temperature fluctuation range in the heat charging and discharging process and the like, but the phase-change material cannot be used as a heat-carrying medium, an independent heat exchanger needs to be designed in the system, and the phase-change material can corrode the wall of the container.
Chemical heat storage refers to storing heat energy using reaction heat of a reversible chemical reaction, and when the reaction heat is higher than an equilibrium temperature of the reversible reaction, an endothermic heat storage reaction occurs, and when the reaction heat is lower than the equilibrium temperature of the reversible reaction, an exothermic reaction occurs. The storage density of chemical heat storage is highest among the three modes.
It is worth mentioning that in the present embodiment, the chemical heat storage material may be one or more of carbonate, alkali, metal oxide, etc., wherein the metal oxide may include one or more of oxides of Cr, Li, Mg, Pb, Pt, Sb, Mn, U, Ba, Co, Rh, Cu, Fe, V. Taking carbonate as an example, when the temperature is higher than the equilibrium temperature of the decomposition synthesis reaction of the carbonate, the carbonate is decomposed and absorbs heat; otherwise, carbonate is synthesized, releasing heat. Taking metal oxide as an example, when the temperature is higher than the oxidation-reduction reaction equilibrium temperature of the metal oxide, a reduction reaction occurs, heat is absorbed, and oxygen is released; when the temperature is lower than the redox reaction equilibrium temperature of the metal oxide, an oxidation reaction occurs, absorbing oxygen, while releasing heat.
Compared with the prior art, the solar high-temperature heat collection and storage gas turbine power generation device has the advantage of high heat storage density by utilizing the chemical heat storage of the chemical heat storage tank 8, and simultaneously, the solar energy can be stored in the chemical heat storage tank 8, so that the influence of unstable illumination received by the solar light collecting port 17 on a system caused by solar energy fluctuation is reduced, the power generation stability of the system is improved, the power generation time is prolonged, and the power quality and the power generation stability of the system are improved. Through the multi-energy complementation of fuel, solar energy, chemical heat storage and the like, the energy can be utilized in a gradient manner, the system efficiency is improved, and the consumption of fossil fuel is reduced, so that the economic efficiency is better. Through 7 coupling chemistry heat storage tanks 8 of solar collector, stabilized the temperature fluctuation of 7 exports of solar collector, prevent that solar collector 7 from overtemperature, guaranteed the safety and stability operation of solar collector 7, prolonged life.
Second embodiment
The second embodiment of the present invention provides a solar high-temperature heat collection and storage gas turbine power generation device, which is a further improvement of the first embodiment, and the main improvement is that, in the second embodiment of the present invention, referring to fig. 3, the solar high-temperature heat collection and storage gas turbine power generation device further includes: a throttle valve 11;
the solar collector 7 is connected to the inlet of the combustion chamber 12 via a throttle 11. The air flow from the solar collector 7 into the combustion chamber 12 can be controlled by means of the throttle valve 11.
Through adjusting the aperture of the throttle valve 11, the flow distribution of the air when passing through the throttle valve 11 and the chemical heat storage tank 8 can be realized, and then the stable air supply temperature can still be ensured under different solar energy states.
Third embodiment
A third embodiment of the present invention provides a solar high-temperature heat collection and storage gas turbine power generation device, which is a further improvement of the first and second embodiments, and the main improvement is that, in the third embodiment of the present invention, referring to fig. 4, the solar high-temperature heat collection and storage gas turbine power generation device further includes: the system comprises a turbine 2 and a heat regenerator 3, wherein a hot fluid side and a cold fluid side are arranged in the heat regenerator 3;
the outlet of the combustion chamber 12 is connected with the inlet of the turbine 2, and the outlet of the turbine 2 is connected with the hot fluid side inlet of the heat regenerator 3;
the outlet of the cold fluid side is connected with the inlet of a three-way valve A4;
the exhaust gas from the turbine 2 enters the hot fluid side for heating the air on the cold fluid side.
After the heat regenerator 3 is arranged and added, the tail gas discharged from the turbine 2 flows through the heat fluid side of the heat regenerator 3, and the air passing through the cold fluid side can be heated by utilizing the heat of the tail gas, so that the heat of the tail gas can be utilized more efficiently, the overall energy consumption of the solar high-temperature heat collection and storage gas turbine power generation device is further reduced, and the energy utilization efficiency is improved.
Embodiment IV
A fourth embodiment of the present invention provides a solar high-temperature heat collection and storage gas turbine power generation device, which is a further improvement of the third embodiment, and is mainly improved in that, in the fourth embodiment of the present invention, referring to fig. 5, the solar high-temperature heat collection and storage gas turbine power generation device further includes: the air compressor 1 and the generator 13, the outlet of the air compressor 1 is connected with the inlet of the cold fluid side and is used for inputting compressed air to the cold fluid side; the generator 13 is connected with the compressor 1, and the compressor 1 is connected with the turbine 2.
The compressor 1 is used as a power consumption part and can compress atmospheric air and then convey the compressed air. When the turbine 2 and the compressor 1 are connected, the work performed by the turbine 2 can provide a part of the power for the compressor 1 through the connected main shaft, so that the system does not need to provide additional power for the compressor 1. Further, since the temperature of the exhaust gas directly discharged from the turbine 2 is still high, the reliability of the direct connection between the generator 13 and the turbine 2 is not good, and the service life of the generator 13 can be further prolonged by connecting the generator 13 to the turbine 2 via the compressor 1.
Fifth embodiment
A fifth embodiment of the present invention provides a solar high-temperature heat collection and storage gas turbine power generation device, which is a further improvement of the third and fourth embodiments, and is mainly improved in that, in the fifth embodiment of the present invention, referring to fig. 6, the solar high-temperature heat collection and storage gas turbine power generation device further includes: and a waste heat utilization device 5.
The waste heat utilization device 5 is connected with an outlet on the heat fluid side of the heat regenerator 3;
the tail gas of the turbine 2 passes through the hot fluid side and then enters the waste heat utilization device 5, and heat energy is further recovered.
The tail gas reheated by the heat regenerator 3 is subjected to waste heat recovery by the waste heat utilization device 5, so that the heat of the tail gas is utilized in a gradient manner, and the utilization efficiency of energy is improved better.
Sixth embodiment
A sixth embodiment of the present invention provides a solar high-temperature heat collection and storage gas turbine power generation device, which is a further improvement of the fifth embodiment, and is mainly improved in that, in the sixth embodiment of the present invention, referring to fig. 7, the solar high-temperature heat collection and storage gas turbine power generation device further includes: an induced draft pipeline and an induced draft fan 6; the solar heat collector 7 is arranged in an open manner;
the induced draft pipeline is connected with the solar heat collector 7 and is connected to the inlet of the waste heat utilization device 5, and the induced draft fan 6 is arranged at the outlet of the waste heat utilization device 5. When the induced draft fan 6 works, air enters the solar heat collector 7 from the environment and then enters the waste heat utilization device 5 through the induced draft pipeline.
The circulating air improves the heat transfer effect in the solar collector 7. The excess heat can be introduced into the waste heat utilization device 5, and the energy efficiency is improved.
Seventh embodiment
A seventh embodiment of the present invention provides a solar high-temperature heat collection and storage gas turbine power generation device, which is a further improvement of the first to sixth embodiments, and is mainly improved in that in the seventh embodiment of the present invention, referring to fig. 8, at least two chemical heat storage substances are provided in a chemical heat storage tank 8, and the reaction equilibrium temperature of the chemical heat storage substances decreases in order from the high-temperature side to the low-temperature side of the chemical heat storage tank 8. When a plurality of chemical heat storage substances are arranged, a temperature gradient can be formed in the chemical heat storage tank 8 in sequence. When air sequentially passes through the chemical heat storage substances through the pipelines in the chemical heat storage tank 8, the air and the chemical heat storage substances can be subjected to temperature exchange in sequence, so that the temperature change rate of the air is improved, and the energy storage effect of the chemical heat storage tank 8 is improved.
Further, as shown in fig. 7, in the present embodiment, the chemical heat storage substance forms a plurality of chemical heat storage layers 9 from the high temperature side toward the low temperature side, and the chemical heat storage layers are distributed at intervals from layer to layer. The spacing distribution can prevent interference and heat exchange among different layers, and further can better maintain the temperature gradient.
Embodiment eight
An eighth embodiment of the present invention provides a solar high-temperature heat collecting and storing gas turbine power generation device, and the eighth embodiment is a further improvement of the first to seventh embodiments, and the main improvement is that in the eighth embodiment of the present invention, an air heat collecting pipe 16 is arranged in a solar heat collector 7.
In a solar thermal power generation system, one key component is the solar collector 7. The function of the solar heat collector is to convert the focused sunlight into heat energy. Because the solar thermal collector 7 works in severe environments such as high temperature, high pressure and uneven high-intensity solar radiation, damage and even safety accidents are easily caused by improper design or control. Stable and safe operation of the solar collector 7 is therefore of great importance.
Referring to fig. 9, in the present embodiment, an air heat collecting tube 16 is disposed in the solar heat collector 7, and the air heat collecting tube 16 is U-shaped and distributed along the circumferential direction of the solar heat collector 7. The air heat collecting pipes 16 distributed along the circumferential direction of the solar heat collector 7 can utilize the space of the solar heat collector 7 to the maximum extent, and the density of the air heat collecting pipes 16 is improved. It should be mentioned that in the present embodiment, the air heat collecting tubes 16 may also be spirally distributed in the solar heat collector 7; alternatively, the air heat collecting pipes 16 are radially distributed from the center of the solar heat collector 7 to the outside. The air heat collecting pipes 16 distributed spirally can increase the heat contact area and improve the heat transfer and heat conduction efficiency, and the air heat collecting pipes 16 distributed radially from the center to the outer side are easier to transfer heat and design the matched equipment, so that the cost can be reduced.
More importantly, in the present embodiment, the collector chemical heat storage substance 18 is filled around the air heat collecting tube 16, and the collector chemical heat storage substance 18 is also filled at the lower part of the air heat collecting tube 16. When the temperature in the solar thermal collector 7 is higher than the reaction equilibrium temperature of the thermal collector chemical heat storage substance 18, the thermal collector chemical heat storage substance 18 reacts to absorb redundant heat and store the redundant heat as chemical energy, and when the temperature in the solar thermal collector 7 is lower than the reaction equilibrium temperature of the thermal collector chemical heat storage substance 18, the thermal collector chemical heat storage substance 18 generates a heat release reaction to release the chemical energy, so that the heat is transferred to the air in the air thermal collector 16 and heated to a high temperature, the shortage of solar energy is made up, and the temperature of the solar thermal collector 7 is stabilized. Therefore, the chemical heat storage material 18 of the solar collector is filled around the air heat collecting tube 16, so that the service life of the solar collector 7 can be further prolonged.
It should be noted that the collector chemical heat storage substance 18 in the present embodiment may be the same as or different from the chemical heat storage substance disposed in the chemical heat storage tank 8. One skilled in the art can select different kinds of chemical heat storage substances to be disposed at different positions according to actual temperature requirements.
In addition, when the induced draft fan 6 and the induced draft duct described in the sixth embodiment are provided, as shown in fig. 9, the induced draft duct connection port 15 is further provided on the solar heat collector 7, and the induced draft duct connection port 15 is provided at the bottom of the solar heat collector 7. The induced draft fan 6 is used for controlling the amount of air flowing, so that the heat absorption and heat release reaction rates of the chemical heat storage substances 18 of the heat collector can be better controlled, and better heat storage and heat release effects can be obtained.
It will be appreciated by those of ordinary skill in the art that in the embodiments described above, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be basically implemented without these technical details and various changes and modifications based on the above-described embodiments. Accordingly, in actual practice, various changes in form and detail may be made to the above-described embodiments without departing from the spirit and scope of the invention.

Claims (10)

1. A solar high-temperature heat collection and storage gas turbine power generation device comprises: combustion chamber (12), solar collector (7) and three-way valve A (4), its characterized in that: the system also comprises a chemical heat storage tank (8) and a three-way valve B (10);
the chemical heat storage tank (8) has a high temperature side and a low temperature side;
one outlet of the three-way valve A (4) is connected with a compressed air inlet (14) of the solar heat collector, the other outlet of the three-way valve A is connected with the inlet of the three-way valve B (10), one outlet of the three-way valve B (10) is connected with the low-temperature side of the chemical heat storage tank (8), and the other outlet of the three-way valve B is connected with the inlet of the combustion chamber (12);
a compressed air outlet (19) of the solar heat collector is connected with the high-temperature side of the chemical heat storage tank (8) and the inlet of the combustion chamber (12), and the low-temperature side of the chemical heat storage tank (8) is also connected with the inlet of the combustion chamber (12);
when the solar energy is sufficient, air enters the solar heat collector (7) through the three-way valve A (4), is heated and increases the temperature, one part of the air from the solar heat collector (7) enters the chemical heat storage tank (8), sequentially passes through each layer of chemical heat storage substances from the high-temperature side to the low-temperature side, and the other part of the air enters the combustion chamber (12) for auxiliary combustion;
when solar energy is not enough, the air enters the chemical heat storage tank (8) through the three-way valve A (4) and the three-way valve B (10), sequentially passes through each layer of chemical heat storage substances from the low-temperature side to the high-temperature side, is heated by heat released by the chemical heat storage tank (8), and then enters the combustion chamber (12) for auxiliary combustion.
2. The solar high-temperature heat collection and storage gas turbine power generation device as claimed in claim 1, wherein: an air heat collecting pipe (16) is arranged in the solar heat collector (7), and chemical heat storage substances (18) of the heat collector are filled around the air heat collecting pipe (16).
3. The solar high-temperature heat collection and storage gas turbine power generation device as claimed in claim 2, wherein:
the lower part of the air heat collecting pipe (16) is filled with a heat collector chemical heat storage substance (18); the air heat collecting pipes (16) are spirally distributed in the solar heat collector (7);
or the air heat collecting pipes (16) are radially distributed from the center of the solar heat collector (7) to the outside;
or the air heat collecting pipes (16) are distributed along the circumferential direction of the solar heat collector (7).
4. The solar high-temperature heat collection and storage gas turbine power generation device as claimed in claim 1, wherein: further comprising: the system comprises a turbine (2) and a heat regenerator (3), wherein a hot fluid side and a cold fluid side are arranged in the heat regenerator (3);
the outlet of the combustion chamber (12) is connected with the inlet of the turbine (2), and the outlet of the turbine (2) is connected with the hot fluid side inlet of the heat regenerator (3);
the outlet of the cold fluid side is connected with the inlet of the three-way valve A (4);
the tail gas discharged by the turbine (2) enters the hot fluid side and is used for heating the air on the cold fluid side.
5. The solar high-temperature heat collection and storage gas turbine power generation device as claimed in claim 4, wherein: further comprising: the waste heat utilization device (5), the waste heat utilization device (5) is connected with the outlet of the heat fluid side of the heat regenerator (3);
and tail gas of the turbine (2) passes through the hot fluid side and then enters the waste heat utilization device (5) to further recover heat energy.
6. The solar high-temperature heat collection and storage gas turbine power generation device as claimed in claim 5, wherein: further comprising: an induced draft pipeline and an induced draft fan (6); the solar heat collector (7) is arranged in an open manner;
the induced draft pipeline with solar collector (7) are connected to the import of waste heat utilization device (5), draught fan (6) are arranged in the export of waste heat utilization device (5).
7. The solar high-temperature heat collection and storage gas turbine power generation device as claimed in claim 4, wherein: the device also comprises a compressor (1) and a generator (13), wherein an outlet of the compressor (1) is connected with an inlet of the cold fluid side and is used for inputting compressed air to the cold fluid side;
the generator (13) is connected with the compressor (1), and the compressor (1) is connected with the turbine (2).
8. The solar high-temperature heat collection and storage gas turbine power generation device as claimed in claim 1, wherein: further comprising: a throttle valve (11);
the solar heat collector (7) is connected with the inlet of the combustion chamber (12) through the throttle valve (11).
9. The solar high-temperature heat collection and storage gas turbine power generation device as claimed in claim 1, wherein: at least two chemical heat storage substances are arranged in the chemical heat storage tank (8), and the reaction balance temperature of the chemical heat storage substances is reduced from the high-temperature side to the low-temperature side of the chemical heat storage tank (8) in sequence.
10. The solar high-temperature heat collection and storage gas turbine power generation device as claimed in claim 9, wherein: the chemical heat storage substance forms a plurality of chemical heat storage layers (9) from the high-temperature side to the low-temperature side, and the chemical heat storage layers are distributed at intervals.
CN201611090624.2A 2016-08-12 2016-11-30 Solar high-temperature heat collection and storage gas turbine power generation device Active CN108301927B (en)

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