CN104359241A - Sensible heat storage type solar heat accumulation tube and regulation and control heating method - Google Patents
Sensible heat storage type solar heat accumulation tube and regulation and control heating method Download PDFInfo
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- CN104359241A CN104359241A CN201410574637.1A CN201410574637A CN104359241A CN 104359241 A CN104359241 A CN 104359241A CN 201410574637 A CN201410574637 A CN 201410574637A CN 104359241 A CN104359241 A CN 104359241A
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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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Abstract
The invention discloses a sensible heat storage type solar heat accumulation tube and a regulation and control heating method. The sensible heat storage type solar heat accumulation tube comprises a heat exchange tube, a heat accumulator, a vacuum glass tube, a corrugated connecting tube, end covers, vacuum exhaust holes, a selective light absorption coating and a filling agent, wherein the heat exchange tube is in interference fit connection with the heat accumulator in a coaxial manner through the filling agent; two ends of the heat exchange tube are respectively connected with the corrugated connecting tube in a welded manner; the corrugated connecting tube is in sealed connection with the vacuum glass tube through the end covers; the vacuum exhaust holes are formed in the end covers; the selective light absorption coating is plated on the surface of the heat accumulator. By adding the heat accumulator on the heat accumulation tube, the problems that the temperature and the flow of a heat exchange medium of a solar heat accumulation system are fluctuated because of the intermittent characteristics of solar energy are effectively solved by virtue of the sensible heat accumulation of the heat accumulator, and very good technical support is provided for stable operation of the solar heat accumulation system.
Description
Technical field
The present invention relates to solar energy heating Manifold technology, particularly relate to a kind of sensible heat heat accumulating type solar energy heat collection pipe and regulation and control heating means.
Background technology
Photo-thermal heliotechnics is the important component part of current sustainable energy development, has wide market prospects.Solar energy heat collection pipe is the core component of photo-thermal solar energy system, and its performance quality directly determines the performance indications of solar energy system.How to improve and improve the performance of existing solar energy heat collection pipe, most important for the performance improving solar energy system.
Because solar irradiation is affected by the climate, the intermittent feature of ubiquity.Therefore, there is the problem of intermittent hot-fluid heating in the heating of thermal-collecting tube, and this intermittent hot-fluid heating can cause the temperature of thermal-collecting tube to occur momentary fluctuation along with the change of radiation parameter, finally certain impact is all subject on the fatigue properties of thermal-collecting tube, the temperature grade etc. of outlet hot fluid.
Therefore, how to ensure to reduce the impact of intermittent irradiation on thermal-collecting tube performance, realize the heating of comparatively continous-stable, become a great problem and challenge that traditional solar energy heat collection pipe faces.
Summary of the invention
The object of the invention is to overcome the problems referred to above, a kind of sensible heat heat accumulating type solar energy heat collection pipe and regulation and control heating means are provided.
For achieving the above object, the present invention is by the following technical solutions:
Sensible heat heat accumulating type solar energy heat collection pipe comprises heat exchanger tube, heat storage, glass tube with vacuum, corrugated connecting tube, end cap, vacuum pumping opening, selective absorption coating, filler; Heat exchanger tube is connected by the coaxial interference fit of filler and heat storage, heat exchanger tube two ends are welded to connect with corrugated connecting tube respectively, corrugated connecting tube realizes being tightly connected by end cap and glass tube with vacuum, and end cap is provided with vacuum pumping opening, the selective light-absorbing coating of plated surface of heat storage.
Described heat storage is solid-state single-phase heat-storing material, and solid-state single-phase heat-storing material comprises graphite, carbon-point, concrete.Described filler comprises high-temperature heat-conductive glue, expanded graphite, Graphene, CNT micro-nano powder.Heat accumulating type solar energy heat collection pipe comprises straight tubular and U-shaped bushing type two kinds of forms, wherein, between the glass tube with vacuum of U-shaped bushing type thermal-collecting tube and heat storage, bracing frame is housed.
The regulation and control heating means of sensible heat heat accumulating type solar energy heat collection pipe: incident solar energy is transferred to heat storage by the absorption of selective absorption coating and is transferred to heat exchanger tube again, finally heats intraductal working medium, realizes heat delivery.Improve heat exchange thermal resistance by filler between heat storage and heat exchanger tube, improve rate of heat transfer; In endothermic process, first heat storage is heated, under nominal situation, heat storage has passed through the elevated storage of own temperature partial heat, when there is transient change in solar irradiation, regulated by the rising/reduction of heat storage own temperature, simultaneously by regulating the flow in thermal-collecting tube, reach steady heat transfer to the object of heat exchanger tube, realize the steady and continuous heat transfer of exchange heat pipe, ensure that the laser heating work of thermal-collecting tube, avoid thermal-collecting tube outlet temperature and fluctuate because of the transient change of sunshine, improve the adaptability of thermal-collecting tube to solar irradiation condition.
The present invention by adding heat storage on thermal-collecting tube, the lifting of the temperature of heat storage is utilized to absorb and release, ensure that the steady heat transfer object of thermal-collecting tube, effectively overcome the problem that solar energy Intermittent Features causes solar thermal collection system temperature and flowed fluctuation, the stable operation for solar thermal collection system provides good technical support.
Accompanying drawing explanation
Fig. 1 (a) is straight tubular sensible heat heat accumulating type solar energy heat collection pipe schematic diagram;
Fig. 1 (b) is U-shaped bushing type sensible heat heat accumulating type solar energy heat collection pipe schematic diagram;
Fig. 2 is thermal-collecting tube schematic cross-section.
In figure: heat exchanger tube 1, heat storage 2, glass tube with vacuum 3, corrugated connecting tube 4, end cap 5, vacuum pumping opening 6, selective absorption coating 7, filler 8, bracing frame 9.
Detailed description of the invention
As shown in Figure 1, sensible heat heat accumulating type solar energy heat collection pipe comprises heat exchanger tube 1, heat storage 2, glass tube with vacuum 3, corrugated connecting tube 4, end cap 5, vacuum pumping opening 6, selective absorption coating 7, filler 8; Heat exchanger tube 1 is connected with the coaxial interference fit of heat storage 2 by filler 8, heat exchanger tube 1 two ends are welded to connect with corrugated connecting tube 4 respectively, corrugated connecting tube 4 realizes being tightly connected by end cap 5 and glass tube with vacuum 3, end cap 5 is provided with vacuum pumping opening 6, the selective light-absorbing coating 7 of plated surface of heat storage 2.
Described heat storage 2 is solid-state single-phase heat-storing material, and solid-state single-phase heat-storing material comprises graphite, carbon-point, concrete.Described filler 8 is high temperature resistant, high heat conduction, low thermal resistance material, and has good expansion rate, comprises high-temperature heat-conductive glue, expanded graphite, Graphene, CNT micro-nano powder.Sensible heat heat accumulating type solar energy heat collection pipe comprises straight tubular and U-shaped bushing type two kinds of forms, wherein, between the glass tube with vacuum 3 of U-shaped bushing type thermal-collecting tube and heat storage 2, bracing frame 9 is housed.
Sensible heat heat accumulating type solar energy heat collection pipe regulation and control heating means: incident solar energy is transferred to heat storage 2 by selective absorption coating 7 absorption and is transferred to heat exchanger tube 1 again, finally heats intraductal working medium, realizes heat delivery.Improve heat exchange thermal resistance by filler 8 between heat storage 2 and heat exchanger tube 1, improve rate of heat transfer, in endothermic process, first heat storage 2 is heated, under nominal situation, heat storage 2 has passed through the elevated storage of own temperature partial heat, when there is transient change in solar irradiation, regulated by the rising/reduction of heat storage 2 own temperature, simultaneously by regulating the flow in thermal-collecting tube, reach steady heat transfer to the object of heat exchanger tube 1, realize the steady and continuous heat transfer of exchange heat pipe 1, ensure that the laser heating work of thermal-collecting tube, avoid thermal-collecting tube outlet temperature to fluctuate because of the transient change of sunshine, improve the adaptability of thermal-collecting tube to solar irradiation condition.
The course of work of sensible heat heat accumulating type solar energy heat collection pipe is as follows: solar irradiation is mapped on thermal-collecting tube, selective absorption coating is by absorbing sunshine heat storage body, along with the rising of regenerator temperature, because filler has good expansion rate and heat conductivility, after expanded by heating, further increase the contact between heat storage and heat-transfer pipe, reduce thermal contact resistance, improve heat-conducting effect, heat storage heat is transferred to replace tubes on the one hand and heats thermal-arrest intraductal working medium, stores partial heat on the one hand by the sensible heat of self.
When solar irradiation raises fast, first heat storage is heated, and due to its heat accumulation function, thus has delayed the climbing speed of temperature in thermal-collecting tube; When solar irradiation reduces fast, heat storage is by the sensible heat of self, and exchange heat-pipe working medium proceeds heating, ensure that the effect of the continuation heating of thermal-collecting tube, has delayed thermal-collecting tube temperature cooldown rate; Finally achieving improving the sensitivity coefficient of thermal-collecting tube temperature to solar irradiation, improve the Stability and adaptability of system.
Apparatus of the present invention by introducing heat storage in thermal-collecting tube, by utilizing the sensible heat accumulation of heat of heat storage, ensure that the installation fixation problem of heat storage on the one hand, avoid when instantaneous sunshine sudden change on the other hand, the erratic fluctuations of thermal-collecting tube also rapid mutation thereupon, effectively raise the adaptability of thermal-collecting tube to solar energy irradiation characteristic, improve the stability of solar energy system.
Claims (5)
1. a sensible heat heat accumulating type solar energy heat collection pipe, is characterized in that comprising heat exchanger tube (1), heat storage (2), glass tube with vacuum (3), corrugated connecting tube (4), end cap (5), vacuum pumping opening (6), selective absorption coating (7), filler (8); Heat exchanger tube (1) is connected with heat storage (2) coaxial interference fit by filler (8), heat exchanger tube (1) two ends are welded to connect with corrugated connecting tube (4) respectively, corrugated connecting tube (4) realizes being tightly connected by end cap (5) and glass tube with vacuum (3), end cap (5) is provided with vacuum pumping opening (6), the selective light-absorbing coating of plated surface (7) of heat storage (2).
2. a kind of sensible heat heat accumulating type solar energy heat collection pipe according to claim 1, it is characterized in that described heat storage (2) is for solid-state single-phase heat-storing material, solid-state single-phase heat-storing material comprises graphite, carbon-point, concrete.
3. a kind of sensible heat heat accumulating type solar energy heat collection pipe according to claim 1, is characterized in that described filler (8) comprises high-temperature heat-conductive glue, expanded graphite, Graphene, CNT micro-nano powder.
4. a kind of sensible heat heat accumulating type solar energy heat collection pipe according to claim 1, it is characterized in that this thermal-collecting tube comprises straight tubular and U-shaped bushing type two kinds of forms, wherein, between the glass tube with vacuum (3) of U-shaped bushing type thermal-collecting tube and heat storage (2), bracing frame (9) is housed.
5. one kind uses the regulation and control heating means of sensible heat heat accumulating type solar energy heat collection pipe as claimed in claim 1, it is characterized in that: incident solar energy is transferred to heat storage (2) by selective absorption coating (7) absorption and is transferred to heat exchanger tube (1) again, final heating intraductal working medium, realizes heat delivery, improve heat exchange thermal resistance by filler (8) between heat storage (2) and heat exchanger tube (1), improve rate of heat transfer, in endothermic process, heat storage (2) is first heated, under nominal situation, heat storage (2) has passed through the elevated storage of own temperature partial heat, when there is transient change in solar irradiation, regulated by the rising/reduction of heat storage (2) own temperature, simultaneously by regulating the flow in thermal-collecting tube, reach steady heat transfer to the object of heat exchanger tube (1), realize the steady and continuous heat transfer of exchange heat pipe (1), ensure that the laser heating work of thermal-collecting tube, avoid thermal-collecting tube outlet temperature to fluctuate because of the transient change of sunshine, improve the adaptability of thermal-collecting tube to solar irradiation condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410574637.1A CN104359241A (en) | 2014-10-24 | 2014-10-24 | Sensible heat storage type solar heat accumulation tube and regulation and control heating method |
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| CN201410574637.1A CN104359241A (en) | 2014-10-24 | 2014-10-24 | Sensible heat storage type solar heat accumulation tube and regulation and control heating method |
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| CN104359241A true CN104359241A (en) | 2015-02-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548333A (en) * | 2018-06-11 | 2018-09-18 | 张俊霞 | A kind of solar thermal collection system using graphene |
| CN113465063A (en) * | 2021-07-26 | 2021-10-01 | 珠海格力电器股份有限公司 | Heat storage device, air conditioning system and heat storage control method |
| CN114353344A (en) * | 2022-03-17 | 2022-04-15 | 山东华业阳光新能源有限公司 | Gas condensation type solar heat collecting pipe |
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| CN2541793Y (en) * | 2002-04-12 | 2003-03-26 | 徐斌 | Solid medium accmulation vacuum tube solar water heater |
| CN101581506A (en) * | 2009-06-26 | 2009-11-18 | 无锡意凯顺得科技有限公司 | Straight-way solar energy heat exchange heat collector |
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| CN102628614A (en) * | 2012-03-23 | 2012-08-08 | 苑金良 | Heat storage and exchange type solar water heater |
| CN102748974A (en) * | 2011-04-21 | 2012-10-24 | 北京实力源科技开发有限责任公司 | Solid heat storage structure and processing method |
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2014
- 2014-10-24 CN CN201410574637.1A patent/CN104359241A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2541793Y (en) * | 2002-04-12 | 2003-03-26 | 徐斌 | Solid medium accmulation vacuum tube solar water heater |
| CN101581506A (en) * | 2009-06-26 | 2009-11-18 | 无锡意凯顺得科技有限公司 | Straight-way solar energy heat exchange heat collector |
| CN201731655U (en) * | 2009-12-23 | 2011-02-02 | 北京博日明能源科技有限公司 | Novel high-efficient solar-energy water heater |
| CN101915465A (en) * | 2010-08-30 | 2010-12-15 | 上海交通大学 | Solar heat storing and collecting device |
| CN102748974A (en) * | 2011-04-21 | 2012-10-24 | 北京实力源科技开发有限责任公司 | Solid heat storage structure and processing method |
| CN102374670A (en) * | 2011-10-19 | 2012-03-14 | 浙江大学 | Heat-transferring improved U-shaped solar heat-collecting pipe |
| CN102628614A (en) * | 2012-03-23 | 2012-08-08 | 苑金良 | Heat storage and exchange type solar water heater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548333A (en) * | 2018-06-11 | 2018-09-18 | 张俊霞 | A kind of solar thermal collection system using graphene |
| CN113465063A (en) * | 2021-07-26 | 2021-10-01 | 珠海格力电器股份有限公司 | Heat storage device, air conditioning system and heat storage control method |
| CN114353344A (en) * | 2022-03-17 | 2022-04-15 | 山东华业阳光新能源有限公司 | Gas condensation type solar heat collecting pipe |
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Application publication date: 20150218 |
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