CN113418308A - Cross-season solar high-temperature heat storage system and method - Google Patents
Cross-season solar high-temperature heat storage system and method Download PDFInfo
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- CN113418308A CN113418308A CN202110695159.XA CN202110695159A CN113418308A CN 113418308 A CN113418308 A CN 113418308A CN 202110695159 A CN202110695159 A CN 202110695159A CN 113418308 A CN113418308 A CN 113418308A
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- Prior art keywords
- heat
- butterfly valve
- electric butterfly
- temperature
- solar
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/20—Working fluids specially adapted for solar heat collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/30—Arrangements for connecting the fluid circuits of solar collectors with each other or with other components, e.g. pipe connections; Fluid distributing means, e.g. headers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/60—Thermal insulation
- F24S80/65—Thermal insulation characterised by the material
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
Abstract
The invention discloses a cross-season solar high-temperature heat storage system and a method, relates to the field of energy utilization, and aims to solve the problems that a large water storage pool is needed for storing heat required in a heat supply period of a large flat-meter factory building, and engineering cannot be realized. Wherein: the solar energy high-temperature heat collector comprises a high-temperature heat collector, a heat conveying system, a heat storage bin, a heat exchanger and a user side, wherein the high-temperature heat collector is a groove type or butterfly type solar heat collecting module with solar energy focusing, a solar energy high-temperature heat source with the temperature of more than 300 ℃ can be obtained, the heat storage bin is respectively communicated with the high-temperature heat collector and the heat exchanger through the heat conveying system, the heat storage bin stores heat collected by the high-temperature heat collector, and the stored heat is conveyed to the user side through the heat exchanger. The heat loss of the heat preservation device of the system and the method is minimum, the heat load heat supply balance in the heat supply period is achieved, and the system and the method have high practicability.
Description
Technical Field
The invention relates to the field of energy utilization, in particular to a season-crossing solar high-temperature heat storage system and method.
Background
The existing solar energy seasonal buried pipe heat storage devices all adopt water as heat transfer and storage media, the working temperature of water is low under normal pressure, generally about 70 ℃, the heat transfer temperature difference is small, so that the heat storage capacity is limited, and a large enough water storage pool is needed for storing heat required by a large plain factory during the heat supply period, so that the engineering can not be realized.
Disclosure of Invention
The invention aims to provide a cross-season solar high-temperature heat storage system and a method to realize high-temperature heat storage and really realize solar cross-season heat source utilization, and provides a cross-season heat storage and supply device, namely rich heat of solar energy in a non-heat supply period is stored in clay, and a heat preservation device is provided to ensure that heat loss is minimum and balance of heat load heat supply in the heat supply period is achieved.
In order to achieve the purpose, the technical solution of the invention is as follows:
the cross-season solar high-temperature heat storage system comprises a high-temperature heat collector, a heat delivery system, a heat storage bin, a heat exchanger and a user side, wherein the high-temperature heat collector is a trough type or butterfly type solar heat collection module with solar focusing and can obtain a solar high-temperature heat source above 300 ℃, the heat storage bin is respectively communicated with the high-temperature heat collector and the heat exchanger through the heat delivery system, and heat is delivered to the user side through the heat exchanger;
the heat conveying system comprises a solar heat collecting pipeline, a heat conveying medium and a plurality of control valves, wherein the solar heat collecting pipeline is used for collecting solar heat to heat fluid media in a pipe and comprises a heat storage circulating pipeline and a heat supply circulating pipeline, the heat storage circulating pipeline guides heat conducting oil in an oil storage tank into the high-temperature heat collector through a circulating oil pump, at the moment, the first electric butterfly valve and the third electric butterfly valve are opened simultaneously, the high-temperature heat collector is communicated with the heat storage bin to store the collected heat into the heat storage bin, and the heat conducting oil which flows to the heat storage bin flows back to the oil storage tank; the heat supply circulation pipeline is in a sunny state, the first electric butterfly valve and the fourth electric butterfly valve are opened, the second electric butterfly valve and the third electric butterfly valve are closed, in a cloudy state, the second electric butterfly valve and the fourth electric butterfly valve are opened, the first electric butterfly valve and the third electric butterfly valve are closed, high-temperature heat conduction oil flows through the heat exchanger and flows into the oil storage pool through the outlet of the heat exchanger to form a circulation passage, and the heat supply loop is switched according to the weather state to store heat to the maximum extent;
the influence of various factors on the heat absorption capacity and the heat transfer capacity is considered:
wherein
In order to absorb the heat quantity,
the specific heat melting is adopted, and the specific heat melting is adopted,
in order to be of a mass,
in order to be the temperature difference,
the material is constant when the material is determined, so that the material can absorb the same heat, the larger the temperature difference is, the smaller the required mass is, the heat conduction oil adopted by the invention can reach the high temperature of more than 300 ℃, and the environment temperature can be considered as a constant number, so that the material can obtain the required heat by adopting a smaller heat storage bin;
P=
where P is the transfer power, i.e. the heat transfer capacity,
in order to be a thermal conductivity coefficient,
in order to be a heat-conducting area,
for temperature difference, if the temperature difference is a fixed number, the smaller the heat conductivity coefficient is, the lower the heat transfer capacity is, i.e. the stronger the heat preservation capacity is, under the condition of the same heat conduction area, the refractory bricks, the rock wool and the polyurethane board adopted by the invention can effectively reduce the heat conductivity coefficient to carry out good temperature locking and reduce heat loss.
Taking the Tangshan area as an example, the average sunshine hours per day in 1-12 months is as follows:
the data of the group is measured 15 days per month, and is regarded as the average number of effective sunshine time per month, taking heating as an example, 5-10 months can be obtained as a solar heat energy rich period, namely a heat storage period, 3 and 4 months are equipment maintenance periods, and 2 months from 11 months to the next year are heat supply periods. According to Q =
Wherein P is the solar intensity, S is the heating area, T is the heating time, y is the efficiency, the solar intensity and the efficiency are assumed to be constant in different regions, the solar heat can be collected through the effective solar time T and the mirror surface area S of the heat collector
According to
=
The heat quantity obtained by the heat storage bin can be calculated according to a heat transfer formula P =
，
Wherein
In order to be the thickness of the film,
is heat conductivity, coefficient of heat conductivity
The heat storage bin is determined according to the material and the thickness of the heat insulation layer, and the upper part of the heat storage bin adopts
Thick rock wool
Thick polyurethane plate heat preservation, laying on the upper part of heat storage bin
The heat-insulating technology can effectively reduce the heat conductivity coefficient, reduce the heat loss and maximally insulate and store the heat in the heat bin under the condition of ensuring that the cost is not increased.
After the technical scheme is adopted, the high-temperature heat storage system and the method have the following advantages:
1. the high-temperature-resistant heat conduction oil is adopted for heat conduction, the clay with larger specific heat capacity is used for heat storage, and compared with the water heat conduction and heat storage under normal pressure, the heat storage quantity per unit volume is larger and more stable;
2. the clay has low cost, is free from maintenance and aging, is simple and feasible, and is easy to engineer;
3. the clay is adopted for heat storage, so that the heat storage is nontoxic, pollution-free, clean and environment-friendly;
4. the cross-season heat storage can realize the purpose of storing a large amount of heat energy by using less heat collecting equipment (a trough type or butterfly type high-temperature heat collector).
Drawings
FIG. 1 is a schematic cross-sectional view of a thermal storage chamber according to the present invention;
FIG. 2 is a heat storage cycle heat transfer oil flow diagram of the present invention;
FIG. 3 is a heat supply circulation heat transfer oil flow diagram in a sunny state;
FIG. 4 is a heat supply circulation heat transfer oil flow diagram in a cloudy day state.
The figures correspond to the names: 1. the solar heat collection module comprises a solar heat collection module, 2 a heat transmission device, 3 a heat storage bin, 4 a heat exchanger, 5 an oil storage pool, 6 a user end, 7 a circulating oil pump, 8 a first electric butterfly valve, 9 a second electric butterfly valve, 10 a third electric butterfly valve and 11 a fourth electric butterfly valve.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The heat storage period is as shown in fig. 2, the first electric butterfly valve and the third electric butterfly valve are in an open state, the second electric butterfly valve and the fourth electric butterfly valve are in a closed state, the circulating oil pump is opened to convey heat conduction oil to the heat transmission device, the heat collection pipe of the heat transmission device 2 is used for heating flowing heat conduction oil by receiving a solar high-temperature heat source with the temperature of more than 300 ℃ obtained by the groove type or butterfly type solar heat collection module 1 with solar focusing, the high-temperature heat conduction oil is conveyed into the heat conduction pipe of the heat storage bin 3, and the heat of the high-temperature heat conduction oil is stored into clay through direct contact of the heat conduction oil pipe and the clay.
In a sunny day, the first electric butterfly valve and the fourth electric butterfly valve are in an open state, the second electric butterfly valve and the fourth electric butterfly valve are in an open state, and the heat stored in the clay and the heat generated in the heat taking period are provided to the user side 6 through the heat exchanger to achieve the effect of cross-season heat supply.
The cloudy state of heat supply period is shown in fig. 4, and second electric butterfly valve and fourth electric butterfly valve are in the open mode, and first electric butterfly valve and fourth electric butterfly valve are in the open mode, provide the heat of clay deposit for user 6 through the heat exchanger in order to reach the effect of crossing season heat supply.
Claims (8)
1. Stride season festival solar energy high temperature heat accumulation system, its characterized in that: including high temperature heat collector, heat delivery system, heat-retaining storehouse, heat exchanger and user, the high temperature heat collector can obtain the solar energy high temperature heat source more than 300 ℃ for the slot type or butterfly solar heat collection module that has solar energy focus, the heat-retaining storehouse passes through heat delivery system respectively with the high temperature heat collector with heat exchanger intercommunication, the heat-retaining storehouse is right the heat that the high temperature heat collector collects is stored, through heat exchanger carries the heat of storage extremely the user.
2. The season-spanning solar high temperature thermal storage system of claim 1, wherein the heat delivery system comprises a solar heat collection pipe, a circulating oil pump, a heat delivery medium, a first electric butterfly valve, a second electric butterfly valve, a third electric butterfly valve, and a fourth electric butterfly valve;
the solar heat collection pipeline comprises a heat storage circulating pipeline and a heat supply circulating pipeline, the heat storage circulating pipeline is communicated with the high-temperature heat collector, the heat storage bin and the circulating oil pump, the first electric butterfly valve and the third electric butterfly valve are opened, the second electric butterfly valve and the fourth electric butterfly valve are closed to form a heat storage loop, and the circulating oil pump pushes heat in the heat storage circulating pipeline to convey a medium to circulate;
the heat supply circulation pipeline is communicated with the heat storage bin, the circulation oil pump and the heat exchanger, and is in a cloudy state, the second electric butterfly valve and the fourth electric butterfly valve are opened, the first electric butterfly valve and the third electric butterfly valve are closed, and is in a sunny state, the first electric butterfly valve and the fourth electric butterfly valve are opened, and the second electric butterfly valve and the third electric butterfly valve are closed to form a heat supply loop.
3. The seasonal solar energy high temperature thermal storage system of claim 2, wherein the heat transport medium is a thermal oil.
4. The seasonal solar energy high temperature thermal storage system of claim 2, the heat delivery system further comprising an oil reservoir disposed on and in communication with the heating circulation line.
5. The season-crossing solar high temperature thermal storage system according to claim 2, wherein the thermal storage bin comprises a polyurethane slab layer, a rock wool layer, a firebrick layer, a mixed clay layer and a plurality of heat conducting oil pipes, wherein the polyurethane slab layer, the rock wool layer, the firebrick layer and the mixed clay layer are arranged in sequence from outside to inside;
many heat conduction oil pipe is in according to certain interval parallel arrangement in the mixed clay layer, heat conduction oil pipe's import with solar energy collection pipe's export flange joint, heat-retaining storehouse heat conduction oil pipe's export is passed through fourth electric butterfly valve and third electric butterfly valve respectively with heat exchanger with the oil storage pool is connected.
6. The heat storage method of the transseasonal solar high-temperature heat storage system according to any one of claims 1 to 5, wherein: the heat storage bin is characterized in that a solar high-temperature heat source transfers heat to clay in the heat storage bin through heat conduction oil serving as a heat transfer medium to store the heat, the heat conduction oil can bear the high temperature of 300 ℃, the fluidity of the heat storage bin can be kept at the low temperature of 25 ℃ below zero, and the heat storage bin is insulated by adopting refractory bricks, rock wool and polyurethane boards.
7. The method for solar high-temperature heat storage across seasons according to claim 6, wherein: the heat conduction oil pipe of the embedded clay and the clay of the heat storage bin are in direct contact heat exchange, and the heat conduction oil pipe is made of steel.
8. The method for solar high-temperature heat storage across seasons according to claim 6, wherein:
the influence of various factors on the heat absorption capacity and the heat transfer capacity is considered:
wherein
In order to absorb the heat quantity,
the specific heat melting is adopted, and the specific heat melting is adopted,
in order to be of a mass,
in order to be the temperature difference,
the material is constant when the material is determined, the same heat is absorbed, the larger the temperature difference is, the smaller the required mass is, the heat conduction oil can reach the high temperature of more than 300 ℃, the environmental temperature can be considered as a fixed number, and the required heat can be obtained by adopting a smaller heat storage bin;
P= 
where P is the transfer power, i.e. the heat transfer capacity,
in order to be a thermal conductivity coefficient,
in order to be a heat-conducting area,
when the temperature difference is constant, the smaller the heat conductivity coefficient is, the lower the heat transfer capacity is, and the stronger the heat preservation capacity is.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110695159.XA CN113418308A (en) | 2021-06-23 | 2021-06-23 | Cross-season solar high-temperature heat storage system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110695159.XA CN113418308A (en) | 2021-06-23 | 2021-06-23 | Cross-season solar high-temperature heat storage system and method |
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| Publication Number | Publication Date |
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| CN113418308A true CN113418308A (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110695159.XA Withdrawn CN113418308A (en) | 2021-06-23 | 2021-06-23 | Cross-season solar high-temperature heat storage system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115046239A (en) * | 2022-05-20 | 2022-09-13 | 湖南大学 | Solar energy stride season sand high temperature heat accumulation building heating system |
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| KR101329439B1 (en) * | 2013-04-15 | 2013-11-14 | (주)비엔텍아이엔씨 | Heat storage greenhouse warming apparatus of solar thermal energy and control method of the same |
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| CN205897308U (en) * | 2016-04-13 | 2017-01-18 | 华电电力科学研究院 | Central heating system based on distributing type heating heat -retaining technique |
| CN206037450U (en) * | 2016-07-29 | 2017-03-22 | 刘勇 | Solar energy energy storage in season heating system strides |
| CN206281227U (en) * | 2016-10-26 | 2017-06-27 | 广州万宝集团有限公司 | A kind of high temperature degree section step heat utilization system |
| CN109611936A (en) * | 2019-01-07 | 2019-04-12 | 常州市亚美电气制造有限公司 | Solar energy is across the season heating water system of unique supplying heat source |
-
2021
- 2021-06-23 CN CN202110695159.XA patent/CN113418308A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101329439B1 (en) * | 2013-04-15 | 2013-11-14 | (주)비엔텍아이엔씨 | Heat storage greenhouse warming apparatus of solar thermal energy and control method of the same |
| CN204534802U (en) * | 2015-02-03 | 2015-08-05 | 深圳市大康能源发展有限公司 | A kind of phase-change thermal storage coupled solar collection heat storage and heat supply system |
| CN205897308U (en) * | 2016-04-13 | 2017-01-18 | 华电电力科学研究院 | Central heating system based on distributing type heating heat -retaining technique |
| CN206037450U (en) * | 2016-07-29 | 2017-03-22 | 刘勇 | Solar energy energy storage in season heating system strides |
| CN206281227U (en) * | 2016-10-26 | 2017-06-27 | 广州万宝集团有限公司 | A kind of high temperature degree section step heat utilization system |
| CN109611936A (en) * | 2019-01-07 | 2019-04-12 | 常州市亚美电气制造有限公司 | Solar energy is across the season heating water system of unique supplying heat source |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115046239A (en) * | 2022-05-20 | 2022-09-13 | 湖南大学 | Solar energy stride season sand high temperature heat accumulation building heating system |
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Application publication date: 20210921 |