CN206191946U - Solar energy step heating high temperature solar collecting system based on fused salt heat transfer heat accumulation - Google Patents
Solar energy step heating high temperature solar collecting system based on fused salt heat transfer heat accumulation Download PDFInfo
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- CN206191946U CN206191946U CN201520856920.3U CN201520856920U CN206191946U CN 206191946 U CN206191946 U CN 206191946U CN 201520856920 U CN201520856920 U CN 201520856920U CN 206191946 U CN206191946 U CN 206191946U
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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
Solar energy step heating high temperature solar collecting system based on fused salt heat transfer heat accumulation includes: low temperature salt storage tank (1), high temperature salt storage tank (9), low temperature fused salt pump (2), high -temperature molten salt pump (10), medium temperature thermal -arrest section (3), high temperature thermal -arrest section (6), fused salt working medium heat exchanger (11), heat equipment (12) and circulating pump (13). Compared with the prior art, high temperature thermal -arrest section (6) comprises spotlight ware (7) and receiver, and the fused salt temperature can reach more than 550 DEG C in receiver (8). The utility model discloses control the fused salt operating temperature of medium temperature thermal -arrest section (3) within 400 DEG C, the heat loss of having guaranteed thermal -collecting tube (5) just through addding high temperature thermal -arrest section (6), makes the operating temperature of fused salt reach more than 550 DEG C at less within range, has correspondingly improved the hot conversion efficiency of system.
Description
Technical field
The utility model belongs to technical field of energy storage, and in particular to a kind of solar energy cascade based on Molten Salt Heat Transfer accumulation of heat adds
Hot high-temperature heat collection system.
Background technology
Solar energy heat utilization technology is that the radiation energy of the sun is directly converted to a kind of cleaning energy that heat energy is used
Source utilizes technology.Solar energy heat utilization system mainly has slot type, tower and three kinds of systems of dish-style.Groove type solar solar thermal utilization
System belongs to middle temperature system, and it uses groove profile parabolic concentrator heat collector, usual focusing ratio between 10~100, in heat collector
Working media running temperature be usually no more than 600 DEG C.Tower type solar solar thermal utilization system belongs to high-temperature systems, and it utilizes number
By on solar heat radiation reflection to its overhead receivers, focusing ratio is generally 300~1000 to the numerous heliostat of amount, and tower top is received
The working media running temperature of device is up to more than 650 DEG C.Disc type solar energy solar thermal utilization system belongs to high-temperature systems, and it uses dish
Shape paraboloidal mirror gathers on the cavity receiver of focal point sunshine, focusing ratio up to more than 3000, in cavity receiver
Working media running temperature is general more than 850 DEG C.
In groove type solar solar thermal utilization system, the heat loss of vacuum heat collection pipe be system thermal efficiency main influence because
One of element, and the heat loss of thermal-collecting tube depends primarily on its operating temperature.With the increase of thermal-collecting tube operating temperature, its heat loss
Also increase.Particularly, when the operating temperature of thermal-collecting tube is more than 400 DEG C, the thermal efficiency of system declines rapidly, the life-span of thermal-collecting tube
Also decrease.If reducing its operating temperature ensureing that heat collecting pipe heat waste is lost in less scope, the heat of system can be caused to turn
Changing efficiency also reduces.
At present, except groove type solar solar thermal utilization system has begun to enter commercialized running, the tower and dish-style sun
Energy solar thermal utilization system is still within experimental stage.In addition, substitute heliostat by disk like paraboloidal mirror being constituted with overhead receivers
Dish tower type solar solar thermal utilization system, combine well disk system focusing ratio is high and the power system capacity of tower system
Big the advantages of.The utility model provides a kind of solar energy cascade heating high-temperature heat collection system based on Molten Salt Heat Transfer accumulation of heat, its
Middle slot type solar concentrating collector collects hot arc as the middle temperature of system, and its working media running temperature is no more than 400 DEG C, high temperature
Collect the operating temperature of hot arc up to more than 550 DEG C, thermal conversion efficiency is high.
The content of the invention
For deficiencies of the prior art, the utility model provides a kind of by middle temperature collection hot arc and high-temperature heat-gathering
Duan Zucheng solar energy cascade heating high-temperature heat collection system, wherein groove type solar concentrating collector as system middle temperature thermal-arrest
Section, its working media running temperature is no more than 400 DEG C, and the operating temperature of high-temperature heat-gathering section is up to more than 550 DEG C.
The technical problem that the utility model is solved is achieved through the following technical solutions：
Solar energy cascade heating high-temperature heat collection system based on Molten Salt Heat Transfer accumulation of heat, including：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 collection hot arc 3, high-temperature heat-gathering section 6, fused salt-working fluid heat exchanger 11, with heat
Equipment 12 and circulating pump 13.
Described low temperature storage salt cellar 1, low-temperature molten salt pump 2, middle temperature collection hot arc 3, high-temperature heat-gathering section 6, high temperature storage salt cellar 9, height
Temperature molten salt pump 10 and fused salt-working fluid heat exchanger 11 are sequentially connected by fused salt pipeline and connect, so as to constitute fused salt circulation loop.
Described fused salt-working fluid heat exchanger 11, heating equipment 13 and circulating pump 13 are sequentially connected by heat supply pipeline and connect, from
And constitute and use soft circulation circuit.
In fused salt circulation loop, the low temperature storage salt cellar 1 collects hot arc 3 by the low-temperature molten salt pump 3 to the middle temperature
Output low-temperature molten salt, after low-temperature molten salt is heated to 300~400 DEG C, is directly entered the high-temperature heat-gathering section 6 and continues to absorb heat
It is changed into more than 550 DEG C of high-temperature molten salt, subsequent high-temperature molten salt is stored in the high temperature storage salt cellar 9, in needs heat, high temperature
Fused salt is delivered to the fused salt-working fluid heat exchanger 11 and transfers heat to through the high-temperature melting salt pump 10 uses hot working fluid, then drops
Temperature is changed into low-temperature molten salt and returns to the low temperature storage salt cellar 1.
In soft circulation circuit, the heat of high-temperature molten salt is absorbed in the fused salt-working fluid heat exchanger 11 with hot working fluid
Afterwards, it is transported in the heating equipment 12, for doing work, generating electricity or heat supply etc., then cooling condensation, by the circulating pump
13 are re-delivered to continue next round circulation in the fused salt-working fluid heat exchanger 11.
Described middle temperature collection hot arc 3 is made up of groove type paraboloid mirror 4 and thermal-collecting tube 5, and the temperature of fused salt is less than in thermal-collecting tube
400℃。
Described high-temperature heat-gathering section 6 is made up of concentrator 7 and receiver 8, and the concentrator 7 has heliostat and butterfly parabolic
Two kinds of face mirror, the receiver 8 has two kinds of forms of overhead receivers and cavity receiver.Therefore, high-temperature heat-gathering section 6 have by
Heliostat and overhead receivers composition dish-style that is tower, being made up of dish-style paraboloidal mirror and cavity receiver and by dish-style parabolic
The tower Three models of dish of face mirror and overhead receivers composition, the temperature of fused salt can reach more than 550 DEG C in the receiver 8.
The fused salt is the molten state of two or more inorganic salt mixt, and its operating temperature is 300~1000
Between DEG C.
Described hot working fluid be water, vapor, conduction oil, fused salt, liquid metal, air or other can be situated between as heat transfer
The material of matter.
Beneficial effect
The beneficial effects of the utility model are：
Solar energy cascade heating high-temperature heat collection system based on Molten Salt Heat Transfer accumulation of heat, middle temperature is collected the groove type paraboloid of hot arc
The fused salt running temperature of concentrating collector controlled within 400 DEG C, prevents the excessive system that causes of the heat loss of vacuum heat collection pipe
Efficiency of utilization is greatly lowered, so as to ensure groove type paraboloid concentrating collector safe and stable operation under rational operating mode.This
Outward, by being additionally arranged high-temperature heat-gathering section, the running temperature of fused salt can be made to reach more than 550 DEG C, correspondingly improves system
Thermal conversion efficiency.
Brief description of the drawings
Fig. 1 is that the utility model high-temperature heat-gathering section is tower system schematic；
Fig. 2 is that the utility model high-temperature heat-gathering section is the system schematic of dish-style；
Fig. 3 is that the utility model high-temperature heat-gathering section is the tower system schematic of dish；
1- low temperature stores up salt cellar, 2- low-temperature molten salt pumps, the middle temperature collection hot arcs of 3-, 4- groove type paraboloid mirrors, 5- thermal-collecting tubes, 6- high temperature
Collection hot arc, 7- concentrators, 8- receivers, 9- high temperature storage salt cellar, 10- high-temperature melting salt pumps, 11- fused salts-working fluid heat exchanger, 12- is used
Hot equipment, 13- circulating pumps；
Specific embodiment
Embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings, following examples are only the utility model
Preferred embodiment, be not used to limit utility model, it is all that any modification or equivalent are made in thought of the present utility model,
Within protection domain of the present utility model.
Embodiment 1：High-temperature heat-gathering section 6 is the tower system being made up of heliostat and overhead receivers
As shown in figure 1, the present embodiment includes：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
11st, 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, the reception of heliostat 7, tower top
Device 8, high temperature storage salt cellar 9, high-temperature melting salt pump 10 and the composition fused salt circulation loop of fused salt-working fluid heat exchanger 11.
Described fused salt-working fluid heat exchanger 11, heating equipment 12 and the composition soft circulation circuit of circulating pump 13.
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,
Groove type paraboloid mirror 4 gathers on thermal-collecting tube 5 sunshine, and the fused salt in thermal-collecting tube 5 is heated to 300~400 DEG C.From thermal-arrest
The middle temperature molten salt of the outflow of pipe 5 is entered directly into overhead receivers 8, and heliostat 7 gathers on overhead receivers sunshine, will
Fused salt in overhead receivers 8 is heated to more than 550 DEG C.High temperature storage salt is stored in from the high-temperature molten salt of the outflow of overhead receivers 8
In tank 9.In needs heat, high temperature is stored up the high-temperature molten salt in salt cellar 9 and is delivered to fused salt-working fluid heat exchanger by high-temperature melting salt pump 10
11, high-temperature molten salt is transferred heat to hot working fluid and cooling is changed into low-temperature molten salt, from the low of the outflow of fused salt-working fluid heat exchanger 11
Temperature molten salt comes back to low temperature storage salt cellar 9, continues next round heat transfer accumulation of heat circulation.After with hot working fluid absorption heat, for heat
Equipment 12 done work, generate electricity or heat supply heating etc..
Embodiment 2：High-temperature heat-gathering section 6 is the disk system being made up of heliostat and overhead receivers
As shown in Fig. 2 the present embodiment includes：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 medium
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, sky
Chamber receiver 8, high temperature storage salt cellar 9, high-temperature melting salt pump 10 and the composition fused salt circulation loop of fused salt-working fluid heat exchanger 11.
Described fused salt-working fluid heat exchanger 11, heating equipment 12 and the composition soft circulation circuit of circulating pump 13.
Operation principle with embodiment 1 is identical, and described low-temperature molten salt pump 2 extracts low-temperature molten salt out low temperature storage salt cellar 1, low
Temperature molten salt enters in thermal-collecting tube 5, and 300~400 DEG C are heated to by the optically focused of groove type paraboloid mirror 4, then immediately proceeds to dish-style throwing
More than 550 DEG C are heated in cavity receiver 8 on object plane mirror 7.High-temperature molten salt is stored in 9 in high temperature storage salt cellar, through height
After temperature molten salt pump 10 is delivered to fused salt-working fluid heat exchanger 11 and is exchanged heat with hot working fluid, low temperature storage salt cellar 1 is come back to.
Embodiment 3：High-temperature heat-gathering section 6 is the dish tower system being made up of heliostat and overhead receivers
As shown in figure 3, the present embodiment includes：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 medium
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, tower
Top receiver 8, high temperature storage salt cellar 9, high-temperature melting salt pump 10 and the composition fused salt circulation loop of fused salt-working fluid heat exchanger 11.
Described fused salt-working fluid heat exchanger 11, heating equipment 12 and the composition soft circulation circuit of circulating pump 13.
Operation principle with embodiment 1 is identical, and described low-temperature molten salt is conveyed from low temperature storage salt cellar 1 by low-temperature molten salt pump 2
Into middle thermal-collecting tube 5,300~400 DEG C then are heated to by the optically focused of groove type paraboloid mirror 4, then immediately proceed to the tower sun of dish
More than 550 DEG C can be heated in optically focused receiver.After high-temperature molten salt flows out from overhead receivers 8, high temperature storage salt is entered into
Tank 9.In needs heat, high-temperature molten salt is transferred heat into fused salt-working fluid heat exchanger 11 and uses hot working fluid, at subsequent temperature
Drop and be back to 1 in low temperature storage salt cellar, continue next round heat transfer accumulation of heat circulation.
Claims (8)
1. the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat heats high-temperature heat collection system, it is characterised in that including：Low temperature stores up salt cellar
(1), low-temperature molten salt pump (2), middle temperature collect hot arc (3), high-temperature heat-gathering section (6), high temperature and store up salt cellar (9), high-temperature melting salt pump (10), melt
Salt-working fluid heat exchanger (11), heating equipment (12) and circulating pump (13)；The low temperature stores up salt cellar (1) with the middle temperature collection hot arc
(3) be provided with the low-temperature molten salt pump (2) on the fused salt pipeline between, the fused salt outlet of middle temperature collection hot arc (3) with it is described
The fused salt entrance connection of high-temperature heat-gathering section (6), fused salt outlet and high temperature storage salt cellar (9) of high-temperature heat-gathering section (6)
Fused salt entrance is connected, and is provided with the fused salt pipeline between high temperature storage salt cellar (9) and the fused salt-working fluid heat exchanger (11)
The high-temperature melting salt pump (10), the fused salt outlet of the fused salt-working fluid heat exchanger (11) and the fused salt of low temperature storage salt cellar (1)
Entrance is connected, so as to constitute fused salt circulation loop；Fused salt-the working fluid heat exchanger (11) with hot working fluid export and the use
The use hot working fluid entrance connection of hot equipment (12), being exported with hot working fluid for the heating equipment (12) passes through the circulating pump (13)
Use hot working fluid entrance with the fused salt-working fluid heat exchanger (11) is connected, and soft circulation circuit is used so as to constitute.
2. the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat according to claim 1 heats high-temperature heat collection system, its feature
It is that described middle temperature collects hot arc (3) and is made up of groove type paraboloid mirror (4) and thermal-collecting tube (5).
3. the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat according to claim 2 heats high-temperature heat collection system, its feature
It is that the temperature of fused salt is less than 400 DEG C in the thermal-collecting tube (5).
4. the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat according to claim 1 heats high-temperature heat collection system, its feature
It is that described high-temperature heat-gathering section (6) is made up of concentrator (7) and receiver (8).
5. the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat according to claim 4 heats high-temperature heat collection system, its feature
It is that described concentrator (7) has two kinds of heliostat and butterfly paraboloidal mirror.
6. the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat according to claim 4 heats high-temperature heat collection system, its feature
It is that the receiver (8) has two kinds of forms of overhead receivers and cavity receiver.
7. the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat according to claim 6 heats high-temperature heat collection system, its feature
It is that the temperature of fused salt can reach more than 550 DEG C in the receiver (8).
8. the solar energy cascade based on Molten Salt Heat Transfer accumulation of heat according to claim 1 heats high-temperature heat collection system, its feature
It is that described is the materials such as water, vapor, conduction oil, fused salt, liquid metal, air with hot working fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520856920.3U CN206191946U (en) | 2015-10-30 | 2015-10-30 | Solar energy step heating high temperature solar collecting system based on fused salt heat transfer heat accumulation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520856920.3U CN206191946U (en) | 2015-10-30 | 2015-10-30 | Solar energy step heating high temperature solar collecting system based on fused salt heat transfer heat accumulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965932A (en) * | 2017-10-24 | 2018-04-27 | 国家电网公司 | A kind of solar heat-preservation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965932A (en) * | 2017-10-24 | 2018-04-27 | 国家电网公司 | A kind of solar heat-preservation system |
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