CN102374812A - Solar high-temperature phase change thermal storage device - Google Patents
Solar high-temperature phase change thermal storage device Download PDFInfo
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- CN102374812A CN102374812A CN2010102498884A CN201010249888A CN102374812A CN 102374812 A CN102374812 A CN 102374812A CN 2010102498884 A CN2010102498884 A CN 2010102498884A CN 201010249888 A CN201010249888 A CN 201010249888A CN 102374812 A CN102374812 A CN 102374812A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The invention relates to a solar high-temperature phase change thermal storage device. The device consists of a metal shell, a stainless steel tube, a corundum container and fins, wherein the metal shell has a cylindrical structure, and the upper end face and the lower end face of the metal shell are provided with round holes; the stainless steel tube is positioned in the middle of the metal shell and passes through the round holes on the upper end face and the lower end face of the metal shell; the corundum container is sleeved in the middle of the stainless steel tube; and the fins are arranged in the corundum container. Compared with the prior art, the solar high-temperature phase change thermal storage device can make full use of solar energy, meets various energy demands of high temperature, medium temperature and low temperature, has relatively high efficiency, a compact structure, high leakproofness, high-temperature stability and repeatability and long service life, can reasonably utilize energy and thermal storage systems, and can output a working medium at constant temperature.
Description
Technical field
The present invention relates to a kind of high-temperature phase-change energy storage material technical field, especially relate to a kind of solar energy high-temperature phase-change heat-storing device.
Background technology
Fast development along with whole world industry; The sharp increase of population; Human demands for energy is increased day by day, problems such as the exhausted and environmental pollution of fossil energy meanwhile are also more and more outstanding, produce now and live in wasting phenomenon to the energy very serious; The human energy (like solar energy) that can not effectively utilize occurring in nature again, so energy crisis is more and more severeer.
In recent years, the utilization of solar energy more and more received people's attention.Yet because day alternates with night, natural phenomena such as sleet rain or shine, cause the discontinuity and the fluctuation of solar energy, caused not matching between the Supply and Demand of solar energy.Phase-change material can get up storage of solar energy as a kind of energy storage material, discharges according to different demands again, and the energy is utilized rationally and effectively.Existing research work has obtained very big achievement in this respect.
Yet, utilize the design of phase-change material heat accumulation, heat release and exploitation aspect to exist bigger limitation, be to design such as existing research great majority to low-temperature phase-change material, consider that from the angle of maximum available energy efficient is lower; Heat accumulation and heat release are divided into two parts, through heat-conducting work medium two parts are combined, and volume is big, and have very big heat to scatter and disappear in the conduction process, and this structure is difficult to heat accumulation and exothermic process are combined efficiently; The thermal conductivity factor of inorganic salts high temperature phase change material (pcm) is lower, and this has also had a strong impact on the whole process that phase-change material adds exothermic heat, has influenced the utilization ratio of heat energy.
Summary of the invention
The object of the invention is exactly the solar energy high-temperature phase-change heat-storing device that a kind of efficient height, compact conformation, long service life are provided for the defective that overcomes above-mentioned prior art existence.
The object of the invention can be realized through following technical scheme:
A kind of solar energy high-temperature phase-change heat-storing device; It is characterized in that; This device is made up of metal shell, stainless steel tube, corundum container, multi-disc fin and phase-change material, and described metal shell is a cylindrical-shaped structure, and the upper and lower end face offers circular hole; Described stainless steel tube is located at the middle part of metal shell and passes the circular hole of metal shell upper and lower end face; Described corundum container set is located at the middle part of stainless steel tube, and described multi-disc fin is located in the corundum container at interval, and described phase-change material is filled in the interval of fin.
Be filled with insulation material in the described metal shell, the diameter of metal shell is 200～4000mm, highly is 240～10000mm, and thickness is 2～10mm.
Described insulation material is an alumina-silicate ceramic fibre, and thickness is 50～100mm.
Described stainless steel tube external diameter is 10～400mm, and thickness is 2～20mm.
Described corundum container is a cylindrical-shaped structure, and the diameter of corundum container is 96～3780mm, highly is 136～9780mm, and thickness is 2～50mm.
Described phase-change material is graphite/inorganic salts high-temperature phase-change heat storage composite, and fusing point is 550～600 ℃, and density is 1.5～2.0g/cm
3
Described inorganic salts are selected from one or more in nitrate, chloride or the carbonate.
Described fin is circular stainless steel thin slice, is set in the outside of stainless steel tube, and the fin radius is 39～1665mm, and thickness is 0.5～50mm, and the spacing between each fin is 5～50mm.
Compared with prior art, the present invention has the following advantages:
(1) the present invention is the phase change material device that range of temperature is big and fusing point is high, can make full use of solar energy, satisfies height, the multiple energy requirement of middle low temperature, and efficient is higher, has overcome many defectives of middle low temperature heat-storing device;
(2) compact conformation, airtight, high-temperature stability and better repeatable has been strengthened heat conductivility in design process, and it is big therefore to store heat density, and unit volume is stored thermal efficiency height, long service life;
(3) according to energy requirement, can carry out series, parallel or series-parallel connection between the unit, and can control respectively the heat storage units of different capabilities and quantity, rationally utilize energy and heat reservoir to export working medium by constant temperature to reach.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a sectional structure sketch map of the present invention;
Fig. 3 is the structural representation of stainless steel pipe and fin;
Fig. 4 is stainless steel pipe diameter and phase-change material fusing time curve map;
Fig. 5 is stainless steel spacing of fin and phase-change material fusing time curve map.
1 is that metal shell, 2 is that stainless steel tube, 3 is that corundum container, 4 is that fin, 5 is phase-change material among the figure.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
The storage of small-sized solar high temperature, heat release unit
1) the concrete specification of each several part:
(1) metal shell, and 500 * 600mm (external diameter * highly);
(2) stainless steel pipe, external diameter 100mm;
(3) insulation material, thickness 100mm;
(4) corundum container, thickness 5mm, external diameter 296mm, high 398mm;
(5) stainless steel fin, thickness 2mm, radius are 91mm, spacing of fin is 5mm.
2) stainless steel pipe and fin design experimentation
The diameter of stainless steel pipe, the thickness of stainless steel fin and spacing directly affect the heat accumulation efficient of heat conducting efficient and heat storage units, are the key factors in the heat storage units design process.Carry out following experimentation for this reason:
(1) confirms the stainless steel pipe diameter
Adopt the stainless steel pipe in different apertures, in phase-change material, imbed temperature sensor, through data collecting system, the variations in temperature of record phase-change material compares under the different situations fusing time.Stainless steel pipe diameter and phase-change material fusing time curve map are as shown in Figure 4, select suitable diameter according to this curve map.Take all factors into consideration, it is 100mm that this instance is selected diameter.
(2) confirm the spacing of stainless steel fin
The stainless steel fin thickness is selected the steel plate of 2mm for use, and spacing is confirmed spacing of fin through the method that is similar to (1), and stainless steel spacing of fin and phase-change material fusing time curve map are as shown in Figure 5.Select suitable spacing according to this curve map.It is 5mm that this instance is selected spacing for use.
3) phase-change material: adopt graphite/inorganic salts high-temperature phase-change heat storage composite, its fusing point is 600 ℃, and density is 2g/cm
3, enthalpy of phase change is 500J/g.The phase-change material gross mass is 33kg in this instance, and total phase-change thermal storage amount is 16.5MJ.
Medium-sized solar energy high temperature storage, heat release unit
1) the concrete specification of each several part:
(1) metal shell, and 860 * 1000mm (external diameter * highly);
(2) stainless steel pipe, external diameter 120mm;
(3) insulation material, thickness 100mm;
(4) corundum container, thickness 30mm, external diameter 600mm, high 720mm;
(5) stainless steel fin, thickness 2mm, radius are 200mm, spacing of fin is 50mm.
2) phase-change material: adopt graphite/inorganic salts high-temperature phase-change heat storage composite, its fusing point is 600 ℃, and density is 2g/cm
3, enthalpy of phase change is 500J/g.The phase-change material gross mass is 2 * 10 in this instance
5Kg, total phase-change thermal storage amount is 100MJ.
The storage of large-sized solar high temperature, heat release unit
1) the concrete specification of each several part:
(1) metal shell, and 2000 * 5000mm (external diameter * highly);
(2) stainless steel pipe, external diameter 400mm;
(3) insulation material, thickness 100mm;
(4) corundum container, thickness 50mm, external diameter 1780mm, high 4780mm;
(5) stainless steel fin, thickness 30mm, radius are 640mm, spacing of fin is 30mm.
2) phase-change material: adopt graphite/inorganic salts high-temperature phase-change heat storage composite, its fusing point is 600 ℃, and density is 1.8g/cm3, and enthalpy of phase change is 500J/g.The phase-change material gross mass is 8.6 * 10 in this instance
3Kg, total phase-change thermal storage amount is 4.3 * 10
3MJ.
1) the concrete specification of each several part:
(1) metal shell, and 200 * 240mm (external diameter * highly);
(2) stainless steel pipe, external diameter 10mm;
(3) insulation material, thickness 50mm;
(4) corundum container, thickness 2mm, external diameter 96mm, high 136mm;
(5) stainless steel fin, thickness 0.5mm, radius are 39mm, spacing of fin is 5mm.
2) phase-change material: adopt graphite/inorganic salts high-temperature phase-change heat storage composite, its fusing point is 550 ℃, and density is 1.5g/cm
3, enthalpy of phase change is 500J/g.The phase-change material gross mass is 1.2kg in this instance, and total phase-change thermal storage amount is 0.6MJ.
1) the concrete specification of each several part:
(1) metal shell, and 4000 * 10000mm (external diameter * highly);
(2) stainless steel pipe, external diameter 400mm;
(3) insulation material, thickness 100mm;
(4) corundum container, thickness 50mm, external diameter 3780mm, high 9780mm;
(5) stainless steel fin, thickness 50mm, radius are 1665mm, spacing of fin is 30mm.
2) phase-change material: adopt graphite/inorganic salts high-temperature phase-change heat storage composite, its fusing point is 600 ℃, and density is 2g/cm3, and enthalpy of phase change is 500J/g.The phase-change material gross mass is 8 * 10 in this instance
4Kg, total phase-change thermal storage amount is 4 * 10
4MJ.
A kind of solar energy high-temperature phase-change heat-storing device, its structure are shown in Fig. 1～2, and this device is made up of metal shell 1, stainless steel tube 2, corundum container 3, fin 4 and phase-change material 5; Metal shell 1 is a cylindrical-shaped structure; The circle centre position of upper and lower end face offers circular hole, and diameter is 200mm, highly is 200mm; Thickness is 2mm, and Circularhole diameter is 10mm.Be filled with anti-950 ℃ alumina-silicate ceramic fibre in the metal shell 1 as insulation material, the thickness of insulation material is 50mm.Stainless steel tube 2 is located at the middle part of metal shell 1, and passes the circular hole of metal shell 1 upper and lower end face, and the stainless steel tube external diameter is 10mm, and thickness is 5mm.Corundum container 3 is a cylindrical-shaped structure, and diameter is 96mm, highly is 136mm; Thickness is 2mm, and the circle centre position of upper and lower end face offers circular hole, and the diameter of circular hole is 10mm; Corundum container 3 is set in the middle part of stainless steel tube 2, and set inside has fin 4, and phase-change material 5 is filled between the fin 4; Be graphite/sodium nitrate high-temperature phase-change heat storage composite, fusing point is 550 ℃, and density is 1.5g/cm
3, enthalpy of phase change is 500J/g, and fin 4 is circular stainless steel thin slice, is set in the outside of stainless steel tube, and as shown in Figure 3, the radius of fin 4 is 39mm, and thickness is 0.5mm, the spacing between each fin is 5mm.
Embodiment 7
A kind of solar energy high-temperature phase-change heat-storing device, this device is made up of metal shell, stainless steel tube, corundum container and fin, and metal shell is a cylindrical-shaped structure; The circle centre position of upper and lower end face offers circular hole, and diameter is 4000mm, highly is 10000mm; Thickness is 10mm, and Circularhole diameter is 400mm.Be filled with anti-950 ℃ alumina-silicate ceramic fibre in the metal shell as insulation material, the thickness of insulation material is 80mm.Stainless steel tube is located at the middle part of metal shell, and passes the circular hole of metal shell upper and lower end face, and the stainless steel tube external diameter is 400mm, and thickness is 20mm.The corundum container is a cylindrical-shaped structure, and diameter is 3780mm, highly is 9780mm; Thickness is 50mm, and the circle centre position of upper and lower end face offers circular hole, and the diameter of circular hole is 400mm; The corundum container set is located at the middle part of stainless steel tube, and set inside has fin, and is filled with phase-change material; Phase-change material is graphite/sodium chloride high-temperature phase-change heat storage composite, and fusing point is 600 ℃, and density is 2g/cm
3, enthalpy of phase change is 500J/g, and fin is circular stainless steel thin slice, is set in the outside of stainless steel tube, and the fin radius is 1665mm, and thickness is 30mm, the spacing between each fin is 30mm.
Principle of the present invention is following:
The heat accumulation process: along with the heat-conducting medium temperature that flows into stainless steel tube raises, heat passes to phase-change material through stainless steel pipe and fin, and phase-change material temperature raises, and this process is the sensible heat heat accumulation.When the heat-conducting medium temperature reaches phase transition temperature, the heat transferred phase-change material, phase-change material reaches equal temperature; Begin to undergo phase transition; By the solid-state liquid state (fusion process) that is converted into, phase-change material temperature is almost constant, up to its whole fusings; This process is the latent heat heat accumulation, and this process energy stored is more much bigger than sensible heat heat accumulation process energy stored.After this, along with the heat-conducting medium temperature raises, surpass phase transition temperature, phase-change material temperature continues again to raise, and this process is again a sensible heat heat accumulation process.Flowing out stainless steel pipe heat-conducting medium temperature simultaneously reduces.It is inner that heat energy just is stored in the high-temperature phase-change heat storage unit.
Exothermic process: the heat-conducting medium that flows into stainless steel pipe is the low temperature heat-conducting medium, and heat passes to heat-conducting medium through fin and stainless steel pipe by phase-change material, and phase-change material temperature reduces, and this process is the sensible heat exothermic process.When the phase transition temperature temperature, phase-change material begins to solidify, and discharges a large amount of latent heat, passes to heat-conducting medium, and the temperature of phase-change material almost remains unchanged, and all solidifies up to phase-change material, and this process is the latent heat exothermic process; When temperature further reduces, begin the sensible heat heat release again, till phase-change material temperature reaches room temperature.In whole process, energy discharges from the high-temperature phase-change heat storage unit and connects, and passes to heat-conducting medium.
Claims (8)
1. solar energy high-temperature phase-change heat-storing device; It is characterized in that; This device is made up of metal shell, stainless steel tube, corundum container, multi-disc fin and phase-change material, and described metal shell is a cylindrical-shaped structure, and the upper and lower end face offers circular hole; Described stainless steel tube is located at the middle part of metal shell and passes the circular hole of metal shell upper and lower end face; Described corundum container set is located at the middle part of stainless steel tube, and described multi-disc fin is located in the corundum container at interval, and described phase-change material is filled in the interval of fin.
2. a kind of solar energy high-temperature phase-change heat-storing device according to claim 1 is characterized in that, is filled with insulation material in the described metal shell, and the diameter of metal shell is 200～4000mm, highly is 240～10000mm, and thickness is 2～10mm.
3. a kind of solar energy high-temperature phase-change heat-storing device according to claim 2 is characterized in that described insulation material is an alumina-silicate ceramic fibre, and thickness is 50～100mm.
4. a kind of solar energy high-temperature phase-change heat-storing device according to claim 1 is characterized in that described stainless steel tube external diameter is 10～400mm, and thickness is 2～20mm.
5. a kind of solar energy high-temperature phase-change heat-storing device according to claim 1 is characterized in that described corundum container is a cylindrical-shaped structure, and the diameter of corundum container is 96～3780mm, highly is 136～9780mm, and thickness is 2～50mm.
6. a kind of solar energy high-temperature phase-change heat-storing device according to claim 1 is characterized in that, described phase-change material is graphite/inorganic salts high-temperature phase-change heat storage composite, and fusing point is 550～600 ℃, and density is 1.5～2.0g/cm
3
7. a kind of solar energy high-temperature phase-change heat-storing device according to claim 6 is characterized in that described inorganic salts are selected from one or more in nitrate, chloride or the carbonate.
8. a kind of solar energy high-temperature phase-change heat-storing device according to claim 1 is characterized in that, described fin is circular stainless steel thin slice; Be set in the outside of stainless steel tube; The fin radius is 39～1665mm, and thickness is 0.5～50mm, and the spacing between each fin is 5～50mm.
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| CN2010102498884A CN102374812A (en) | 2010-08-10 | 2010-08-10 | Solar high-temperature phase change thermal storage device |
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| CN2010102498884A CN102374812A (en) | 2010-08-10 | 2010-08-10 | Solar high-temperature phase change thermal storage device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217233A (en) * | 2013-03-29 | 2013-07-24 | 北京遥测技术研究所 | Phase-change heat accumulation type heat flow sensor |
| CN104591685A (en) * | 2015-01-15 | 2015-05-06 | 中国建筑材料科学研究总院 | Intermediate-temperature heat absorption type thermal insulation material and preparation method thereof |
| CN104792031A (en) * | 2015-04-23 | 2015-07-22 | 林元武 | Solar water heater |
| CN110012646A (en) * | 2019-04-19 | 2019-07-12 | 湖北赛格瑞新能源科技有限公司 | A kind of radiating module |
| CN111076593A (en) * | 2019-12-13 | 2020-04-28 | 西安交通大学 | Annular fin type efficient heat storage reactor based on metal hydride |
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| CN2531344Y (en) * | 2002-01-22 | 2003-01-15 | 王智慧 | Integral pipeline phase change regenerative module |
| CN2670826Y (en) * | 2003-12-22 | 2005-01-12 | 清华大学 | Heat storable electric water heater |
| CN101408389A (en) * | 2008-11-26 | 2009-04-15 | 北京航空航天大学 | Combined type foamed metal core material and phase-change thermal storage apparatus using the same |
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2010
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| CN1224747A (en) * | 1998-12-15 | 1999-08-04 | 叶宇 | Chemical heat-accumulating material and its preparation |
| CN2531344Y (en) * | 2002-01-22 | 2003-01-15 | 王智慧 | Integral pipeline phase change regenerative module |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103217233A (en) * | 2013-03-29 | 2013-07-24 | 北京遥测技术研究所 | Phase-change heat accumulation type heat flow sensor |
| CN103217233B (en) * | 2013-03-29 | 2015-05-27 | 北京遥测技术研究所 | Phase-change heat accumulation type heat flow sensor |
| CN104591685A (en) * | 2015-01-15 | 2015-05-06 | 中国建筑材料科学研究总院 | Intermediate-temperature heat absorption type thermal insulation material and preparation method thereof |
| CN104591685B (en) * | 2015-01-15 | 2016-09-28 | 中国建筑材料科学研究总院 | A kind of medium-temperature endothermic heat-barrier material and preparation method thereof |
| CN104792031A (en) * | 2015-04-23 | 2015-07-22 | 林元武 | Solar water heater |
| CN110012646A (en) * | 2019-04-19 | 2019-07-12 | 湖北赛格瑞新能源科技有限公司 | A kind of radiating module |
| CN111076593A (en) * | 2019-12-13 | 2020-04-28 | 西安交通大学 | Annular fin type efficient heat storage reactor based on metal hydride |
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Application publication date: 20120314 |