CN105370519A - Solar photo-thermal power generating system with distributed thermal storage function - Google Patents
Solar photo-thermal power generating system with distributed thermal storage function Download PDFInfo
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- CN105370519A CN105370519A CN201410852299.3A CN201410852299A CN105370519A CN 105370519 A CN105370519 A CN 105370519A CN 201410852299 A CN201410852299 A CN 201410852299A CN 105370519 A CN105370519 A CN 105370519A
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- 238000010248 power generation Methods 0.000 claims description 61
- 238000005338 heat storage Methods 0.000 claims description 36
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- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000010276 construction Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 5
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- 238000010586 diagram Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
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- 238000011161 development Methods 0.000 description 2
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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Abstract
The invention relates to a solar photo-thermal power generating system with the distributed thermal storage function. The solar photo-thermal power generating system comprises a solar thermal collecting device used for collecting solar thermal energy, a heat exchanger connected with the solar thermal collecting device and used for generating overheating saturated steam, and a thermal power converting device connected with the heat exchanger and used for converting the overheating saturated steam into electric energy. The solar thermal collecting device comprises a plurality of tower type photo-thermal modules. The tower type photo-thermal modules comprise B type tower type photo-thermal modules with the distributed thermal storage function. According to the solar power generating system with the modularization solar thermal collecting device, the construction procedure can be simplified, the construction period can be shortened, the design and investment cost of a power station can also be reduced, and efficiency of a mirror field can be improved. When one tower gets a problem, the work state of other tower type photo-thermal modules cannot be affected, and the power supply continuity and stability of the whole power generating system are guaranteed.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a solar photo-thermal power generation system with distributed heat storage.
Background
The tower type solar photo-thermal power generation system has the advantages and the characteristics of wide temperature field and energy field matching setting, large light condensation ratio, high focusing temperature, large energy flux density, high thermal conversion efficiency, wide application range and the like, and can be used in a large scale: the solar energy utilization development such as photo-thermal power generation, water hydrogen production, seawater desalination, metal smelting and the like. Therefore, the tower-type solar photo-thermal power generation system is a solar diversified utilization platform with great value potential.
Many developed countries have developed the technical research of tower solar power generation. However, the development of this technology has been hampered by a number of reasons, mainly two: firstly, the tracking cost of the heliostat is too high, because the precision requirement of remote tracking is extremely high, the gear gapless transmission is required to be achieved, and the caused harsh manufacture is the reason for increasing the tracking cost; and secondly, the power generation scale is too small, the power generation capacity expansion is greatly limited, the tower power generation scale depends on the heliostat field scale, the larger the photothermal power generation scale is, the larger the cost reduction space is, but after the heliostat field scale is enlarged to a certain degree, the overall efficiency of the heliostat field shows a sharp reduction and reduction trend. Therefore, the power generation cost of the current tower type solar power generation system is high, and a large distance is still left from the market requirement.
Disclosure of Invention
The invention aims to solve the technical problem of providing a sustainable, stable and efficient power generation solar photo-thermal power generation system with distributed heat storage, aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a solar photo-thermal power generation system with distributed heat storage is constructed, and comprises: the solar heat collector is used for collecting solar heat energy, the heat exchanger is connected with the solar heat collector and used for generating superheated saturated steam, and the thermal power conversion device is connected with the heat exchanger and used for converting the superheated saturated steam into electric energy; the solar heat collection device comprises a plurality of tower type photo-thermal modules for collecting solar heat; the tower type photothermal modules comprise B type tower type photothermal and thermal modules, wherein,
each B-type tower type photo-thermal module comprises a second heliostat used for focusing sunlight, a second photo-thermal tower provided with a second heat collector, and a distributed heat storage unit connected with the second photo-thermal tower and used for storing heat of a heated working medium in the second heat collector.
The solar photo-thermal power generation system comprises a heat exchanger, a B-type tower photo-thermal module and a solar photo-thermal power generation module, wherein the heat exchanger comprises a plurality of sub heat exchangers, and each B-type tower photo-thermal module comprises one sub heat exchanger.
The solar photo-thermal power generation system is characterized in that the sub heat exchangers of each B-type tower type photo-thermal module are connected with the thermal power conversion device through a high-temperature steam heat storage device for storing supersaturated hot steam.
The solar photo-thermal power generation system comprises a B-type tower photo-thermal module, a B-type solar photo-thermal module and a B-type solar photo-thermal module.
The solar photo-thermal power generation system comprises a plurality of tower type photo-thermal modules, a plurality of solar photo-thermal modules and a plurality of solar photo-thermal modules, wherein the plurality of tower type photo-thermal modules further comprise an A-class tower type photo-thermal module; wherein,
the A-type tower type photo-thermal module comprises a first heliostat for focusing sunlight and a first photo-thermal tower provided with a first heat collector;
and the A-type tower type photo-thermal modules are connected with the heat exchanger through a centralized heat storage unit for storing the heat energy of the heated hot working medium in the first heat collector.
The solar photo-thermal power generation system adopts steam or molten salt as a hot working medium for the A-type tower photo-thermal module.
The solar photo-thermal power generation system comprises a class A tower-type photo-thermal module, a class B tower-type photo-thermal module, a class A tower-type photo-thermal module and a class B tower-type photo-thermal module, wherein the class A tower-type photo-thermal module and the class B tower-type photo-thermal module are connected in series or in parallel.
The solar photo-thermal power generation system comprises a type A tower photo-thermal module, a type B tower photo-thermal module and a type B solar photo-thermal module, wherein one part of the type A tower photo-thermal module adopts fused salt as a hot working medium, the other part of the type A tower photo-thermal module adopts steam as a hot working medium, and the type B tower photo-thermal module adopts fused salt as a hot working medium;
the A-class tower-type photothermal and thermal modules adopting molten salt as a thermal working medium and the A-class tower-type photothermal and thermal modules adopting steam as the thermal working medium are all connected in parallel, and the A-class tower-type photothermal and thermal modules and the B-class tower-type photothermal and thermal modules are connected in parallel.
The solar photo-thermal power generation system is characterized in that the power generation power of a single tower type photo-thermal module is 10-25 MW.
The invention has the beneficial effects that: through adopting the solar photo-thermal power generation system that has modularization solar heat collection device, and take distributed heat-retaining, can simplify the power station construction flow, reduce the construction period, more can reduce power station design investment cost, can also improve the efficiency in mirror field, when one of them single tower goes wrong, can not influence the operating condition of other tower light and heat modules moreover, guaranteed continuation and the stability of whole power generation system power supply.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a distributed heat-storage solar photo-thermal power generation system including a B-type tower type photo-thermal module according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of a single class B tower photothermal module according to a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of a first principle of a solar photo-thermal power generation system with distributed heat storage and comprising a class A tower type photo-thermal module and a class B tower type photo-thermal module according to a preferred embodiment of the present invention;
FIG. 4 is a schematic diagram of a second principle of a solar photo-thermal power generation system with distributed heat storage and comprising a class A tower type photo-thermal module and a class B tower type photo-thermal module according to a preferred embodiment of the present invention;
FIG. 5 is a schematic diagram of a single class A tower photothermal module according to a preferred embodiment of the present invention.
Detailed Description
The principle of the solar photo-thermal power generation system with distributed heat storage of the preferred embodiment of the invention is shown in fig. 1, and comprises: a solar heat collection device for collecting solar heat energy, a heat exchanger connected to the solar heat collection device for producing superheated saturated steam, and a thermal power conversion device 24 connected to the heat exchanger for converting the superheated saturated steam into electrical energy; the solar heat collection device comprises a plurality of tower type photo-thermal modules 11 and 12 for collecting solar heat; the plurality of tower photothermal modules 11, 12 include: a class B tower photothermal module 12. Each B-type tower-type photothermal module 12 includes a second heliostat 121 for focusing sunlight, a second photothermal tower 122 provided with a second heat collector, and a distributed heat storage unit 124 connected to the second photothermal tower 122 for storing heat energy of a heated thermal medium in the second heat collector. By adopting the solar photo-thermal power generation system with the modularized solar heat collection device (hereinafter referred to as the solar photo-thermal power generation system), when a large photo-thermal power station is rebuilt, only the tower type photo-thermal module needs to be copied, so that the construction process can be simplified, the construction period can be shortened, and the design investment cost of the power generation system can be reduced.
Meanwhile, the power supply stability of the whole power generation system can be improved by adopting the solar photo-thermal power generation system. If the photo-thermal power station of single tower, no matter which part goes wrong, whole power generation system's stability can all receive the influence, after adopting modularization solar photo-thermal power generation system, single tower goes wrong can not influence the operating condition of other modules, has guaranteed the continuation and the stability of whole power generation system power supply. In addition, by adopting the solar photo-thermal power generation system, the efficiency of a heliostat field can be improved. If the solar photo-thermal power generation system is a large-scale single-tower photo-thermal power generation system, the distance between the far-end mirror field and the tower top is very far, the efficiency is very low, and after the solar photo-thermal power generation system is adopted, the distance between the mirror field and the tower top can be reduced, the efficiency of the mirror field is improved, and the area and the investment of the mirror field are reduced.
In the above embodiment, the thermal power conversion device 24 of the solar photo-thermal power generation system is preferably a steam turbine generator unit, and the specific model is not limited.
Preferably, in the above embodiment, as shown in fig. 1 and fig. 2, each class B tower-type photothermal module 12 is connected to one sub heat exchanger 123, and the sub heat exchangers 123 of each class B tower-type photothermal module 12 are connected to the thermal power conversion device 24 through one common high-temperature steam heat storage device 13, so as to store the supersaturated hot steam generated by each sub heat exchanger 123 and deliver the supersaturated hot steam to the thermal power conversion device 24 for power generation.
As shown in fig. 1 and 2, the above-mentioned B-type tower-type photothermal module 12 has the following working procedures: the second heliostat 121 reflects sunlight, focuses the sunlight and heats the hot working medium in the second heat collector on the top of the second photo-thermal tower 122, and a part of the heated hot working medium stores heat through the distributed heat storage unit 124, and the other part generates superheated saturated steam through the heat exchanger 123 to drive the thermal power conversion device 24 to generate electricity.
Preferably, as shown in fig. 2, in the above embodiment, a low-temperature steam heat storage device 125 is connected between the sub heat exchanger 123 of each class B tower-type photothermal module 12 and the second photothermal tower 122, and the hot working medium after heat exchange by the sub heat exchanger 123 is pumped to the top of the second photothermal tower 122 for heating, so as to be recycled.
In the above embodiment, the high-temperature steam heat storage device 13 of the solar photo-thermal power generation system includes one heat storage tank, or consists of a plurality of heat storage tanks.
In a further embodiment, as shown in fig. 3, 4 and 5, the plurality of tower-type photothermal modules 11 and 12 constituting the solar heat collecting device in the solar photo-thermal power generation system further include: a class a tower photo-thermal module 11. Each class a tower-type photothermal module 11 includes a first heliostat 111 for focusing sunlight and a first photothermal tower 112 provided with a first heat collector; the A-type tower type photo-thermal modules 11 are connected with the heat exchanger through a centralized heat storage unit 113 for storing the heat energy of the heated hot working medium in the first heat collector.
Referring to fig. 5, the operation flow of the class a tower-type photothermal module 11 is as follows: the first sun mirror 111 reflects sunlight, focuses the sunlight and heats the hot working medium in the first heat collector on the top of the first photothermal tower 112, the heat energy of the heated hot working medium in the first heat collectors of all the class-A tower type photothermal and thermal modules 11 is stored in the common centralized heat storage unit 113, and the stored heat energy generates superheated saturated steam through the heat exchanger to drive the thermal power conversion device 24 to generate electricity.
Preferably, as shown in fig. 5, a low-temperature steam heat storage device 23 is further connected between the heat exchanger and the first photo-thermal tower 112 of the class a tower-type photo-thermal module 11, and the hot working medium after heat exchange by the heat exchanger is pumped to the top of the first photo-thermal tower 112 for heating, so as to be recycled.
That is, the class a tower-type photothermal module 11 is a photothermal module not separately provided with a heat storage unit, and realizes centralized heat storage only by using one centralized heat storage unit 113; the class B tower thermal module 12 is a single thermal module with a distributed thermal storage unit 124.
In a specific embodiment, as shown in fig. 1, the solar heat collection device of the solar photo-thermal power generation system is composed of a B-type tower photo-thermal module 12. Among them, a part of the superheated saturated steam generated by all the B-type tower photo-thermal modules 12 is stored in the distributed heat storage unit, and the other part is stored in the high-temperature steam heat storage device of the solar photo-thermal power generation system, so as to drive the thermal power conversion device 24 (turbo generator unit) to generate power. Although the construction cost of the whole solar photo-thermal power generation system is increased by adopting all the B-type tower photo-thermal modules 12 compared with the a-type tower photo-thermal modules 11, the utilization rate of the superheated saturated steam generated by each tower photo-thermal module can be increased, so that the power generation efficiency of the whole solar photo-thermal power generation system can be improved.
Further, in the above embodiment, the class B tower type photothermal module 12 preferably employs molten salt as the thermal working medium of the heat collector and the distributed heat storage unit. When all the class B tower-type photothermal and thermal modules 12 in the solar photothermal power generation system adopt molten salt as a thermal medium, at least two of the class B tower-type photothermal and thermal modules 12 are connected in series or at least two of the class B tower-type photothermal and thermal modules are connected in parallel.
In another embodiment, as shown in fig. 3 and 4, and referring to fig. 1, 5 and 2, the solar heat collecting device of the solar photo-thermal power generation system includes both the class a tower photo-thermal module 11 and the class B tower photo-thermal module 12. The working process of the single a-type tower photothermal module 11 and the single B-type tower photothermal module 12 refers to the description of the previous embodiment, and is not described herein again.
Further, in the above embodiment, all the class a tower-type photothermal and thermal modules 11 use steam as the thermal medium, all the class B tower-type photothermal and thermal modules 12 use molten salt as the thermal medium, at least two class B tower-type photothermal and thermal modules 11 are connected in series (or at least two class B tower-type photothermal and thermal modules 11 are connected in parallel), and the class a tower-type photothermal and thermal modules 11 and the class B tower-type photothermal and thermal modules 12 are connected in parallel.
Further, in the above embodiment, all the class a tower-type photothermal modules 11 use molten salt as the thermal medium, all the class B tower-type photothermal modules 12 use molten salt as the thermal medium, at least two class B tower-type photothermal modules 11 are connected in series, and the class a tower-type photothermal module 11 and the class B tower-type photothermal module 12 are connected in series or in parallel.
Further, in the above embodiment, a part of the class a tower-type photothermal module 11 uses molten salt as a hot working medium, another part of the class a tower-type photothermal module 11 uses steam as a hot working medium, and all the class B tower-type photothermal and thermal modules 12 use molten salt as a hot working medium; the A-type tower-type photothermal and thermal module 11 adopting molten salt as a thermal working medium and the A-type tower-type photothermal and thermal module 11 adopting steam as the thermal working medium are all connected in parallel, and the A-type tower-type photothermal and thermal module 11 and the B-type tower-type photothermal and thermal module 12 are connected in parallel.
In another preferred embodiment, the modular solar power generation system comprises 20 tower type photo-thermal modules, and the power generation power of each tower type photo-thermal module is 10 MW; the solar heat collector comprises 10A-type tower type photo-thermal modules 11 and 10B-type tower type photo-thermal modules 12, wherein the heat storage time of the 10B-type tower type photo-thermal modules 12 with heat storage is 8 hours, 10A-type tower type photo-thermal modules without heat storage generate electricity through superheated steam, and the concentrated heat storage time is 2 hours.
In the above embodiments, the power generated by the single tower type photo-thermal module may be 5-100MW, preferably 10-25MW, to achieve the optimal power generation effect, but is not limited to tower type photo-thermal modules with other powers.
In conclusion, the solar photo-thermal power generation system with the modularized solar heat collection device and the distributed heat storage is adopted, so that the construction process can be simplified, the construction period can be shortened, the design investment cost of a power station can be reduced, the efficiency of a mirror field can be improved, when one single tower is in a problem, the working states of other tower type photo-thermal modules cannot be influenced, and the continuity and the stability of power supply of the whole power generation system are ensured.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (9)
1. A solar photo-thermal power generation system with distributed heat storage comprises: the solar heat collector is used for collecting solar heat energy, the heat exchanger is connected with the solar heat collector and used for generating superheated saturated steam, and the thermal power conversion device is connected with the heat exchanger and used for converting the superheated saturated steam into electric energy; the solar heat collection device is characterized by comprising a plurality of tower type photo-thermal modules for collecting solar heat; the tower type photothermal modules comprise B type tower type photothermal and thermal modules, wherein,
each B-type tower type photo-thermal module comprises a second heliostat used for focusing sunlight, a second photo-thermal tower provided with a second heat collector, and a distributed heat storage unit connected with the second photo-thermal tower and used for storing heat of a heated working medium in the second heat collector.
2. The solar photothermal power system of claim 1 wherein said heat exchanger comprises a plurality of sub-heat exchangers, each of said class B tower photothermal modules comprising one of said sub-heat exchangers.
3. The solar photothermal power system according to claim 2 wherein said sub heat exchangers of each of said class B tower-type photothermal modules are connected to said thermal power conversion device together through a high temperature vapor heat storage device for storing supersaturated thermal vapor.
4. The solar photothermal power system according to claim 3 wherein said class B tower photothermal module employs molten salt as a thermal medium.
5. The solar photothermal power system according to claim 3 wherein said plurality of tower photothermal modules further comprises a class A tower photothermal module; wherein,
the A-type tower type photo-thermal module comprises a first heliostat for focusing sunlight and a first photo-thermal tower provided with a first heat collector;
and the A-type tower type photo-thermal modules are connected with the heat exchanger through a centralized heat storage unit for storing the heat energy of the heated hot working medium in the first heat collector.
6. The solar photothermal power system according to claim 5 wherein said class A tower type photothermal module employs steam or molten salt as a thermal medium.
7. The solar photothermal power system according to claim 5, wherein all the class A tower photothermal modules employ molten salt as a thermal working medium, all the class B tower photothermal modules employ molten salt as a thermal working medium, and the class A tower photothermal modules and the class B tower photothermal modules are connected in series or in parallel.
8. The solar photo-thermal power generation system according to claim 7, wherein a part of the class A tower photo-thermal modules use molten salt as a thermal working medium, another part of the class A tower photo-thermal modules use steam as a thermal working medium, and the class B tower photo-thermal modules both use molten salt as a thermal working medium;
the A-class tower-type photothermal and thermal modules adopting molten salt as a thermal working medium and the A-class tower-type photothermal and thermal modules adopting steam as the thermal working medium are all connected in parallel, and the A-class tower-type photothermal and thermal modules and the B-class tower-type photothermal and thermal modules are connected in parallel.
9. The solar photothermal power system of claim 1 wherein the power generated by a single tower photothermal module is 10-25 MW.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247621A (en) * | 2016-10-10 | 2016-12-21 | 江苏鑫晨光热技术有限公司 | Distributed heat collection, energy storage system |
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| WO2007099184A1 (en) * | 2006-02-28 | 2007-09-07 | Serled Consultores, S.L. | System for generating steam using solar radiation |
| CN203177503U (en) * | 2013-02-20 | 2013-09-04 | 深圳市爱能森科技有限公司 | Fused salt heat storage heat exchange device for solar energy photothermal power generation |
| CN204458228U (en) * | 2014-12-31 | 2015-07-08 | 深圳市爱能森科技有限公司 | With the solar light-heat power-generation system of distributed heat accumulation |
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2014
- 2014-12-31 CN CN201410852299.3A patent/CN105370519A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007099184A1 (en) * | 2006-02-28 | 2007-09-07 | Serled Consultores, S.L. | System for generating steam using solar radiation |
| CN203177503U (en) * | 2013-02-20 | 2013-09-04 | 深圳市爱能森科技有限公司 | Fused salt heat storage heat exchange device for solar energy photothermal power generation |
| CN204458228U (en) * | 2014-12-31 | 2015-07-08 | 深圳市爱能森科技有限公司 | With the solar light-heat power-generation system of distributed heat accumulation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106247621A (en) * | 2016-10-10 | 2016-12-21 | 江苏鑫晨光热技术有限公司 | Distributed heat collection, energy storage system |
| CN106247621B (en) * | 2016-10-10 | 2021-09-28 | 江苏鑫晨光热技术有限公司 | Distributed heat collection and energy storage system |
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Effective date of registration: 20191227 Address after: 817000 South of Weijiu Road, Delingha Industrial Park, Haixi Mongolian Tibetan Autonomous Prefecture, Qinghai Province Applicant after: QINGHAI ENESOON NEW MATERIALS SCIENCE & TECHNOLOGY Co.,Ltd. Address before: 518057 Guangdong city of Shenzhen province Nanshan District Gao Xin Road No. 009 Chinese Development Institute of science and technology incubator building, 8 floor Applicant before: SHENZHEN ENESOON SCIENCE & TECHNOLOGY Co.,Ltd. |
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Address after: Room 1901, building 2, Hualing international building, No. 722, Beiyi Road, Dongying District, Dongying City, Shandong Province, 257100 Applicant after: Shandong ainengsen New Material Technology Co.,Ltd. Address before: 817000 south of Weijiu Road, industrial park, Delingha City, Haixi Mongolian and Tibetan Autonomous Prefecture, Qinghai Province Applicant before: QINGHAI ENESOON NEW MATERIALS SCIENCE & TECHNOLOGY Co.,Ltd. |
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