CN105222368A - Based on the solar energy cascade heating high-temperature heat collection system of Molten Salt Heat Transfer accumulation of heat - Google Patents
Based on the solar energy cascade heating high-temperature heat collection system of Molten Salt Heat Transfer accumulation of heat Download PDFInfo
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- CN105222368A CN105222368A CN201510730893.XA CN201510730893A CN105222368A CN 105222368 A CN105222368 A CN 105222368A CN 201510730893 A CN201510730893 A CN 201510730893A CN 105222368 A CN105222368 A CN 105222368A
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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
- Y02E10/44—Heat exchange systems
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Abstract
Based on the solar energy cascade heating high-temperature heat collection system of Molten Salt Heat Transfer accumulation of heat, comprising: low temperature storage salt cellar (1), high temperature storage salt cellar (9), low-temperature molten salt pump (2), high-temperature melting salt pump (10), middle temperature thermal-arrest section (3), high-temperature heat-gathering section (6), fused salt-working fluid heat exchanger (11), heating equipment (12) and circulating pump (13).Described middle temperature thermal-arrest section (3) is made up of groove type paraboloid mirror (4) and thermal-collecting tube (5), and in thermal-collecting tube (5), temperature of molten salt is lower than 400 DEG C; High-temperature heat-gathering section (6) is made up of concentrator (7) and receiver, and in receiver (8), temperature of molten salt can reach more than 550 DEG C.The fused salt running temperature of middle temperature thermal-arrest section (3) controls within 400 DEG C by the present invention, ensure that the heat loss of thermal-collecting tube (5) is in more among a small circle, and by setting up high-temperature heat-gathering section (6), make the running temperature of fused salt reach more than 550 DEG C, correspondingly improve the thermal conversion efficiency of system.
Description
Technical field
The invention belongs to technical field of energy storage, be specifically related to a kind of solar energy cascade based on Molten Salt Heat Transfer accumulation of heat heating high-temperature heat collection system.
Background technology
Solar energy heat utilization technology directly the radiant energy of the sun is converted to a kind of clean energy resource that heat energy is used to utilize technology.Solar energy heat utilization system mainly contains slot type, tower and dish-style three kinds of systems.Groove type solar solar thermal utilization system belongs to middle temperature system, and it adopts grooved parabolic concentrator heat collector, and usual focusing ratio is between 10 ~ 100, and the working media running temperature in heat collector is generally no more than 600 DEG C.Tower type solar solar thermal utilization system belongs to high-temperature systems, and it utilizes the heliostat of One's name is legion by solar heat radiation reflection on its overhead receivers, and focusing ratio is generally 300 ~ 1000, and the working media running temperature of overhead receivers can reach more than 650 DEG C.Disc type solar energy solar thermal utilization system belongs to high-temperature systems, and it adopts disk like paraboloidal mirror to be gathered by sunshine on the cavity receiver at focus place, and focusing ratio can reach more than 3000, and in cavity receiver, working media running temperature is generally more than 850 DEG C.
In groove type solar solar thermal utilization system, the heat loss of vacuum heat collection pipe is one of major influence factors of system thermal efficiency, and the heat loss of thermal-collecting tube depends primarily on its operating temperature.Along with the increase of thermal-collecting tube operating temperature, its heat loss also increases.Particularly, when the operating temperature of thermal-collecting tube is more than 400 DEG C, the thermal efficiency of system declines rapidly, and the life-span of thermal-collecting tube also decreases.If ensureing to reduce its operating temperature in the scope that heat collecting pipe heat waste mistake is less, then the thermal conversion efficiency of system can be caused also to reduce.
At present, except groove type solar solar thermal utilization system has started to enter commercialized running, tower still under test with disc type solar energy solar thermal utilization system.In addition, substitute by disk like paraboloidal mirror the dish tower type solar solar thermal utilization system that heliostat and overhead receivers form, well combine the advantages such as the focusing ratio power system capacity that is high and tower system of dish-style system is large.The invention provides a kind of solar energy cascade based on Molten Salt Heat Transfer accumulation of heat heating high-temperature heat collection system, wherein groove type solar concentrating collector is as thermal-arrest section warm in system, its working media running temperature is no more than 400 DEG C, the operating temperature of high-temperature heat-gathering section can reach more than 550 DEG C, and thermal conversion efficiency is high.
Summary of the invention
For prior art above shortcomings, the invention provides a kind of solar energy cascade heating high-temperature heat collection system be made up of middle temperature thermal-arrest section and high-temperature heat-gathering section, wherein groove type solar concentrating collector is as thermal-arrest section warm in system, its working media running temperature is no more than 400 DEG C, and the operating temperature of high-temperature heat-gathering section can reach more than 550 DEG C.
The technical problem that the present invention solves is achieved through the following technical solutions:
Based on the solar energy cascade heating high-temperature heat collection system of Molten Salt Heat Transfer accumulation of heat, comprising: low temperature storage salt cellar 1, high temperature storage salt cellar 9, low-temperature molten salt pump 2, high-temperature melting salt pump 10, middle temperature thermal-arrest section 3, high-temperature heat-gathering section 6, fused salt-working fluid heat exchanger 11, heating equipment 12 and circulating pump 13.
Described low temperature storage salt cellar 1, low-temperature molten salt pump 2, middle temperature thermal-arrest section 3, high-temperature heat-gathering section 6, high temperature storage salt cellar 9, high-temperature melting salt pump 10 are connected successively by fused salt pipeline with fused salt-working fluid heat exchanger 11, thus constitute fused salt closed circuit.
Described fused salt-working fluid heat exchanger 11, heating equipment 13 are connected by heat supply pipeline successively with circulating pump 13, thus constitute and use soft circulation circuit.
In fused salt closed circuit, described low temperature storage salt cellar 1 exports low-temperature molten salt by described low-temperature molten salt pump 3 to described middle temperature thermal-arrest section 3, after low-temperature molten salt is heated to 300 ~ 400 DEG C, directly enter described high-temperature heat-gathering section 6 to continue to absorb the high-temperature molten salt that heat becomes more than 550 DEG C, high-temperature molten salt is stored in described high temperature storage salt cellar 9 subsequently, when needs heat, high-temperature molten salt is delivered to described fused salt-working fluid heat exchanger 11 through described high-temperature melting salt pump 10 and transfers heat to hot working fluid, and then cooling becomes low-temperature molten salt and gets back to described low temperature storage salt cellar 1.
In soft circulation circuit, after absorbing the heat of high-temperature molten salt with hot working fluid in described fused salt-working fluid heat exchanger 11, be transported in described heating equipment 12, for acting, generating or heat supply etc., then to lower the temperature condensation, be again transported in described fused salt-working fluid heat exchanger 11 by described circulating pump 13 and continue next round circulation.
Described middle temperature thermal-arrest section 3 is made up of groove type paraboloid mirror 4 and thermal-collecting tube 5, and in thermal-collecting tube, the temperature of fused salt is lower than 400 DEG C.
Described high-temperature heat-gathering section 6 is made up of concentrator 7 and receiver 8, and described concentrator 7 has heliostat and butterfly paraboloidal mirror two kinds, and described receiver 8 has overhead receivers and cavity receiver two kinds of forms.Therefore, described high-temperature heat-gathering section 6 is by the dish-style that is tower, that be made up of dish-style paraboloidal mirror and cavity receiver be made up of heliostat and overhead receivers and the tower Three models of dish be made up of dish-style paraboloidal mirror and overhead receivers, and in described receiver 8, the temperature of fused salt can reach more than 550 DEG C.
Described fused salt is the molten state of two or more inorganic salt mixt, and its operating temperature is between 300 ~ 1000 DEG C.
Described with hot working fluid be water, steam, conduction oil, fused salt, liquid metal, air or other can be used as the material of heat transfer medium.
Beneficial effect
Beneficial effect of the present invention is:
The fused salt running temperature of the groove type paraboloid concentrating collector of middle temperature thermal-arrest section is controlled within 400 DEG C, prevent the excessive efficiency of utilization of system that causes of the heat loss of vacuum heat collection pipe from greatly reducing, thus ensure groove type paraboloid concentrating collector safe and stable operation under rational operating mode.In addition, by having set up high-temperature heat-gathering section, the running temperature of fused salt can have been made to reach more than 550 DEG C, correspondingly improve the thermal conversion efficiency of system.
Accompanying drawing explanation
Fig. 1 is high-temperature heat-gathering section of the present invention is tower system schematic;
Fig. 2 is high-temperature heat-gathering section of the present invention is the system schematic of dish-style;
The system schematic that Fig. 3 to be high-temperature heat-gathering section of the present invention be dish is tower;
1-low temperature storage salt cellar, 2-low-temperature molten salt pump, warm thermal-arrest section in 3-, 4-groove type paraboloid mirror, 5-thermal-collecting tube, 6-high-temperature heat-gathering section, 7-concentrator, 8-receiver, 9-high temperature storage salt cellar, 10-high-temperature melting salt pump, 11-fused salt-working fluid heat exchanger, 12-heating equipment, 13-circulating pump;
Specific embodiments
Be described in detail to embodiments of the invention below in conjunction with accompanying drawing, following examples are only preferred embodiment of the present invention, not in order to limit the present invention, allly in thought of the present invention, make any amendment or equivalent to replace, all within protection scope of the present invention.
Embodiment 1: high-temperature heat-gathering section 6 is the tower system be made up of heliostat and overhead receivers
As shown in Figure 1, the present embodiment comprises: low temperature storage salt cellar 1, low-temperature molten salt pump 3, groove type paraboloid mirror 4, thermal-collecting tube 5, heliostat (concentrator 7), overhead receivers (receiver 8), high temperature storage salt cellar 9, high-temperature melting salt pump 10, fused salt-working fluid heat exchanger 11, heating equipment 12 and circulating pump 13.
Described low temperature storage salt cellar 1, low-temperature molten salt pump 2, groove type paraboloid mirror 4, thermal-collecting tube 5, heliostat 7, overhead receivers 8, high temperature storage salt cellar 9, high-temperature melting salt pump 10 and fused salt-working fluid heat exchanger 11 form fused salt closed circuit.
Described fused salt-working fluid heat exchanger 11, heating equipment 12 and circulating pump 13 composition soft circulation circuit.
In the present embodiment, the low-temperature molten salt in described low temperature storage salt cellar 1 is delivered to thermal-collecting tube 5 by low-temperature molten salt pump 2, and sunshine gathers on thermal-collecting tube 5 by groove type paraboloid mirror 4, and the fused salt in thermal-collecting tube 5 is heated to 300 ~ 400 DEG C.From thermal-collecting tube 5 flows out, temperature molten salt directly enters into overhead receivers 8, and sunshine gathers on overhead receivers by heliostat 7, and the fused salt in overhead receivers 8 is heated to more than 550 DEG C.The high-temperature molten salt flowed out from overhead receivers 8 is stored in high temperature storage salt cellar 9.When needs heat, by high temperature, the high-temperature molten salt stored up in salt cellar 9 is delivered to fused salt-working fluid heat exchanger 11 to high-temperature melting salt pump 10, high-temperature molten salt transfers heat to hot working fluid and cooling becomes low-temperature molten salt, the low-temperature molten salt flowed out from fused salt-working fluid heat exchanger 11 comes back to low temperature storage salt cellar 9, continues next round heat transfer accumulation of heat circulation.Absorb after heat with hot working fluid, carry out doing work for heating equipment 12, generate electricity or heat supply heating etc.
Embodiment 2: high-temperature heat-gathering section 6 is the dish-style system be made up of heliostat and overhead receivers
As shown in Figure 2, the present embodiment comprises: low temperature storage salt cellar 1, low-temperature molten salt pump 2, groove type paraboloid mirror 4, thermal-collecting tube 5, dish-style paraboloidal mirror (concentrator 7), cavity receiver (receiver 8), high temperature storage salt cellar 9, high-temperature melting salt pump 10, fused salt-working fluid heat exchanger 11, heating equipment 12 and circulating pump 13.
Described low temperature storage salt cellar 1, low-temperature molten salt pump 2, groove type paraboloid mirror 4, thermal-collecting tube 5, dish-style paraboloidal mirror 7, cavity receiver 8, high temperature storage salt cellar 9, high-temperature melting salt pump 10 and fused salt-working fluid heat exchanger 11 form fused salt closed circuit.
Described fused salt-working fluid heat exchanger 11, heating equipment 12 and circulating pump 13 composition soft circulation circuit.
Identical with the operation principle of embodiment 1, low-temperature molten salt is extracted out low temperature storage salt cellar 1 by described low-temperature molten salt pump 2, low-temperature molten salt enters in thermal-collecting tube 5, be heated to 300 ~ 400 DEG C by groove type paraboloid mirror 4 optically focused, the cavity receiver 8 then directly entered on dish-style paraboloidal mirror 7 is heated to more than 550 DEG C.High-temperature molten salt to be stored in high temperature storage salt cellar 9, through high-temperature melting salt pump 10 be delivered to fused salt-working fluid heat exchanger 11 with after hot working fluid heat exchange, come back to low temperature storage salt cellar 1.
Embodiment 3: high-temperature heat-gathering section 6 is the dish tower system be made up of heliostat and overhead receivers
As shown in Figure 3, the present embodiment comprises: low temperature storage salt cellar 1, low-temperature molten salt pump 2, groove type paraboloid mirror 4, thermal-collecting tube 5, dish-style paraboloidal mirror (concentrator 7), overhead receivers (receiver 8), high temperature storage salt cellar 9, high-temperature melting salt pump 10, fused salt-working fluid heat exchanger 11, heating equipment 12 and circulating pump 13.
Described low temperature storage salt cellar 1, low-temperature molten salt pump 2, groove type paraboloid mirror 4, thermal-collecting tube 5, dish-style paraboloidal mirror 7, overhead receivers 8, high temperature storage salt cellar 9, high-temperature melting salt pump 10 and fused salt-working fluid heat exchanger 11 form fused salt closed circuit.
Described fused salt-working fluid heat exchanger 11, heating equipment 12 and circulating pump 13 composition soft circulation circuit.
Identical with the operation principle of embodiment 1, described low-temperature molten salt is delivered in middle thermal-collecting tube 5 from low temperature storage salt cellar 1 by low-temperature molten salt pump 2, be heated to 300 ~ 400 DEG C by groove type paraboloid mirror 4 optically focused subsequently, then directly enter in dish tower type solar optically focused receiver and be heated to more than 550 DEG C.After high-temperature molten salt flows out from overhead receivers 8, enter into high temperature storage salt cellar 9.When needs heat, high-temperature molten salt enters fused salt-working fluid heat exchanger 11 and transfers heat to hot working fluid, and temperature declines and to be back in low temperature storage salt cellar 1 subsequently, continues next round heat transfer accumulation of heat and circulates.
Claims (9)
1. based on the solar energy cascade heating high-temperature heat collection system of Molten Salt Heat Transfer accumulation of heat, it is characterized in that, comprising: low temperature storage salt cellar (1), low-temperature molten salt pump (2), middle temperature thermal-arrest section (3), high-temperature heat-gathering section (6), high temperature storage salt cellar (9), high-temperature melting salt pump (10), fused salt-working fluid heat exchanger (11), heating equipment (12) and circulating pump (13), fused salt pipeline between described low temperature storage salt cellar (1) and described middle temperature thermal-arrest section (3) is provided with described low-temperature molten salt pump (2), the fused salt outlet of described middle temperature thermal-arrest section (3) is connected with the fused salt entrance of described high-temperature heat-gathering section (6), the fused salt entrance that fused salt outlet and the described high temperature of described high-temperature heat-gathering section (6) store up salt cellar (9) is connected, fused salt pipeline between described high temperature storage salt cellar (9) and described fused salt-working fluid heat exchanger (11) is provided with described high-temperature melting salt pump (10), the fused salt entrance that fused salt outlet and the described low temperature of described fused salt-working fluid heat exchanger (11) store up salt cellar (1) is connected, thus constitute fused salt closed circuit, described fused salt-working fluid heat exchanger (11) with hot working fluid outlet and being connected with hot working fluid entrance of described heating equipment (12), described heating equipment (12) with hot working fluid outlet being connected with hot working fluid entrance by described circulating pump (13) and described fused salt-working fluid heat exchanger (11), thus constitute and use soft circulation circuit.
2. the heating of the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat high-temperature heat collection system according to claim 1, it is characterized in that, described middle temperature thermal-arrest section (3) is made up of groove type paraboloid mirror (4) and thermal-collecting tube (5).
3. the heating of the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat high-temperature heat collection system according to claim 2, it is characterized in that, in described thermal-collecting tube (5), the temperature of fused salt is lower than 400 DEG C.
4. the heating of the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat high-temperature heat collection system according to claim 1, it is characterized in that, described high-temperature heat-gathering section (6) is made up of concentrator (7) and receiver (8).
5. the heating of the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat high-temperature heat collection system according to claim 1, it is characterized in that, in described receiver 8, the temperature of fused salt can reach more than 550 DEG C.
6. the heating of the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat high-temperature heat collection system according to claim 5, it is characterized in that, described concentrator (7) has heliostat and butterfly paraboloidal mirror two kinds.
7. the heating of the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat high-temperature heat collection system according to claim 5, it is characterized in that, described receiver (8) has overhead receivers and cavity receiver two kinds of forms.
8. the heating of the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat high-temperature heat collection system according to claim 1, it is characterized in that, described fused salt is the molten state of two or more inorganic salt mixt, and its operating temperature is between 300 ~ 1000 DEG C.
9. the heating of the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat high-temperature heat collection system according to claim 1, it is characterized in that, described with hot working fluid be water, steam, conduction oil, fused salt, liquid metal, air or other can be used as the material of heat transfer medium.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107013427A (en) * | 2017-04-24 | 2017-08-04 | 百吉瑞（天津）新能源有限公司 | A kind of slot type solar-thermal generating system with self-circulation system |
| CN107328120A (en) * | 2017-08-29 | 2017-11-07 | 中机华信诚电力工程有限公司 | A kind of energy storage heat-exchange system of high and low temperature fused salt |
| CN107702355A (en) * | 2017-11-14 | 2018-02-16 | 优晖科技（北京）有限公司 | Butterfly solar energy system |
| CN108375220A (en) * | 2016-11-27 | 2018-08-07 | 余华阳 | A kind of high-temp solar heat collector |
| CN108843278A (en) * | 2018-07-25 | 2018-11-20 | 辽宁工程技术大学 | A kind of device and method of solar energy hot blast heating exploitation low permeability reservoir coal bed gas |
| CN109556353A (en) * | 2018-12-28 | 2019-04-02 | 天津中德应用技术大学 | The dry house system of solar energy optical-thermal energy storage and application method |
| CN110388757A (en) * | 2019-07-29 | 2019-10-29 | 中国科学院上海应用物理研究所 | Solar energy cascade collecting system |
| CN110715542A (en) * | 2019-10-15 | 2020-01-21 | 武汉丰盈能源技术工程有限公司 | System for drying biomass and municipal domestic waste by using solar heat |
| CN111908992A (en) * | 2020-07-31 | 2020-11-10 | 苏州市协力化工设备有限公司 | Device and method for preparing methane by driving carbon dioxide through solar energy |
| CN114608061A (en) * | 2022-04-04 | 2022-06-10 | 哈尔滨新光光电科技股份有限公司 | Slot type solar heating system |
| CN115264564A (en) * | 2022-08-18 | 2022-11-01 | 上海通华不锈钢压力容器工程有限公司 | Modular step heat storage device and system |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108375220A (en) * | 2016-11-27 | 2018-08-07 | 余华阳 | A kind of high-temp solar heat collector |
| CN107013427A (en) * | 2017-04-24 | 2017-08-04 | 百吉瑞（天津）新能源有限公司 | A kind of slot type solar-thermal generating system with self-circulation system |
| CN107328120A (en) * | 2017-08-29 | 2017-11-07 | 中机华信诚电力工程有限公司 | A kind of energy storage heat-exchange system of high and low temperature fused salt |
| CN107702355A (en) * | 2017-11-14 | 2018-02-16 | 优晖科技（北京）有限公司 | Butterfly solar energy system |
| CN108843278B (en) * | 2018-07-25 | 2020-05-19 | 辽宁工程技术大学 | Device and method for exploiting low-permeability reservoir coal bed gas through solar hot air heating |
| CN108843278A (en) * | 2018-07-25 | 2018-11-20 | 辽宁工程技术大学 | A kind of device and method of solar energy hot blast heating exploitation low permeability reservoir coal bed gas |
| CN109556353A (en) * | 2018-12-28 | 2019-04-02 | 天津中德应用技术大学 | The dry house system of solar energy optical-thermal energy storage and application method |
| CN109556353B (en) * | 2018-12-28 | 2024-02-27 | 天津中德应用技术大学 | Solar photo-thermal energy storage drying room system and use method thereof |
| CN110388757A (en) * | 2019-07-29 | 2019-10-29 | 中国科学院上海应用物理研究所 | Solar energy cascade collecting system |
| CN110388757B (en) * | 2019-07-29 | 2021-03-19 | 中国科学院上海应用物理研究所 | Solar energy step heat collecting system |
| CN110715542A (en) * | 2019-10-15 | 2020-01-21 | 武汉丰盈能源技术工程有限公司 | System for drying biomass and municipal domestic waste by using solar heat |
| CN111908992A (en) * | 2020-07-31 | 2020-11-10 | 苏州市协力化工设备有限公司 | Device and method for preparing methane by driving carbon dioxide through solar energy |
| CN114608061A (en) * | 2022-04-04 | 2022-06-10 | 哈尔滨新光光电科技股份有限公司 | Slot type solar heating system |
| CN115264564A (en) * | 2022-08-18 | 2022-11-01 | 上海通华不锈钢压力容器工程有限公司 | Modular step heat storage device and system |
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Application publication date: 20160106 |