阅读说明：本技术 太阳能烟囱筛板型泡沫金属盐水合物蓄热器 (Solar chimney sieve plate type foam metal salt hydrate heat accumulator ) 是由 赵彩燕 陈威 李泽宇 王乾 范庆深 于 2020-12-02 设计创作，主要内容包括：本发明涉及太阳能热化学储能技术领域,公开了太阳能烟囱筛板型泡沫金属盐水合物蓄热器,所述绝热层的顶端设置有热空气出口,且绝热层的内部交错安装有金属泡沫载体蓄热床,所述绝热层的内部开设有空气流道,所述金属泡沫载体蓄热床的外部设置有反应床金属夹网,所述绝热层的一侧边缘位置处安装有玻璃罩,所述玻璃罩的内部安装有太阳能吸收器,且玻璃罩的一端开设有空气入口。本发明旨在通过蛇形的流道结构,使被加热的空气充分将热量传递给蓄热材料并且在热化学反应床中添加金属泡沫基体结构,以改善化学蓄热材料的热量传递情况,使反应床层的温度分布均匀,保证化学热脱附反应顺利进行。(The invention relates to the technical field of solar thermochemical energy storage, and discloses a solar chimney sieve-plate type foam metal salt hydrate heat accumulator. The invention aims to ensure that heated air fully transfers heat to a heat storage material through a snakelike runner structure, and a metal foam matrix structure is added into a thermochemical reaction bed so as to improve the heat transfer condition of the chemical heat storage material, ensure that the temperature of the reaction bed layer is uniformly distributed and ensure that the chemical thermal desorption reaction is smoothly carried out.)

1. Solar chimney sieve plate type foam metal salt hydrate heat accumulator, including heat insulation layer (5), its characterized in that, the top of heat insulation layer (5) is provided with hot-air outlet (4), and the inside crisscross metal foam carrier heat accumulation bed (6) of installing of heat insulation layer (5), air runner (8) have been seted up to the inside of heat insulation layer (5), the outside of metal foam carrier heat accumulation bed (6) is provided with reaction bed metal and presss from both sides net (7), glass cover (3) are installed to one side edge position department of heat insulation layer (5), the internally mounted of glass cover (3) has solar energy absorber (2), and air inlet (1) have been seted up to the one end of glass cover (3).

2. The solar chimney screen plate type foam metal salt hydrate heat accumulator according to claim 1, characterized in that the glass hood (3) is cylindrical and the inclination angle of the glass hood (3) to the horizontal plane may be θ -20 ° to 50 °.

3. The solar chimney screen deck type foam metal salt hydrate heat accumulator according to claim 1, characterized in that the air flow channels (8) are arranged as serpentine pipes, and the metal foam carrier heat accumulation beds (6) are arranged inside the heat insulating layer (5) in a staggered manner in four.

4. The solar chimney screen deck type foam metal salt hydrate heat accumulator according to claim 1, characterized in that the reaction bed metal screen (7) comprises a fixed metal screen (11) mounted inside the heat insulating layer (5), the inside of the fixed metal screen (11) being provided with a first metal foam (9), the inside of the first metal foam (9) being filled with an internal filling layer (10).

5. The solar chimney screen plate type foam metal salt hydrate heat accumulator according to claim 4, characterized in that the thermal conductivity of the inner filling layer (10) is about 0.65-0.8W/(m.K) of magnesium chloride hexahydrate (MgCl 2.6H2O), and the radius r is 0.001-0.030 m of solid particle chemical heat accumulation material.

6. The solar chimney screen deck type foam metal salt hydrate regenerator according to claim 4, wherein the first metal foam (9) is a copper metal foam, and the first metal foam (9) has a porosity in the range of 0.9 to 0.98 and a pore density in the range of 10 to 30 ppi.

7. The solar chimney screen-type foam metal salt hydrate heat accumulator according to claim 4, characterized in that the fixed metal screen (11) comprises a lower plate (13) mounted outside the inner filling layer (10), the outside of the lower plate (13) being provided with an upper plate (14), and the inside of the lower plate (13) and the upper plate (14) being provided with a metal mesh layer (12).

8. The solar chimney screen plate type foam metal salt hydrate heat accumulator according to claim 1, characterized in that the ratio of the thickness of the reaction bed metal screen (7) to the width of the air flow channel (8) is δ, and δ can vary within the range of 0.6-1, the height H, width D of the whole heat accumulation chimney, and H/D varies within the range of 2-1.3.

9. The solar chimney screen plate type foam metal salt hydrate heat accumulator according to claim 1, characterized in that the metal foam is made by a fifth making cup (28), a first making cup (19), a second making cup (21), a third making cup (23) and a fourth making cup (26), the fifth making cup (28) is internally provided with solid hydrated salt (18), the fifth making cup (28) is internally provided with a metal skeleton net (17), the metal skeleton net (17) is internally provided with second metal foam (16), the second metal foam (16) is internally provided with metal foam pores (15), the first making cup (19) is internally provided with molten hydrated salt (20), the second making cup (21) is internally provided with liquid hydrated salt (22), and the third making cup (23) is internally provided with first solid hydrated salt (24), and a second solid hydrated salt (25) is arranged in the fourth manufacturing cup (26), and the manufactured hydrated salt filled metal foam (27) is obtained after the fourth manufacturing cup (26) is taken out.

Technical Field

The invention relates to the technical field of solar thermochemical energy storage, in particular to a solar chimney sieve plate type foam metal salt hydrate heat accumulator.

Background

The exacerbation of the energy crisis has brought about a wide interest in cross-space energy storage, the topic of thermal energy storage via thermochemical reactions and adsorption being on the peak for the first time during the oil crisis in the 70's of the 20 th century. At present, inorganic salt hydrate thermal storage has proven to be reliable in thermal energy storage systems for construction and heat recovery. Therefore, the reasonable and effective utilization of inorganic salt for energy storage and release becomes the key of the thermochemical heat storage technology.

However, in the solar heat storage device, the traditional physical heat storage or phase change heat storage is mostly adopted, and in the heat storage method, the stored heat quantity is relatively small, the required time is long, and the influence of the fluid fluidity on the heat transfer is rarely fully utilized. Accordingly, those skilled in the art have provided a solar chimney screen-type foamed metal salt hydrate regenerator to solve the problems set forth in the background art described above.

Disclosure of Invention

The invention aims to provide a solar chimney sieve plate type foam metal salt hydrate heat accumulator to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

solar chimney sieve type foam metal salt hydrate heat accumulator, including the heat insulation layer, the top of heat insulation layer is provided with the hot-air outlet, and the inside crisscross metal foam carrier heat accumulation bed of installing of heat insulation layer, the air runner has been seted up to the inside of heat insulation layer, the outside of metal foam carrier heat accumulation bed is provided with reaction bed metal clamp net, a side edge position department of heat insulation layer installs the glass cover, the internally mounted of glass cover has the solar energy absorber, and the air inlet has been seted up to the one end of glass cover.

As a still further scheme of the invention: the glass cover is arranged in a cylindrical mode, and the inclination angle between the glass cover and the horizontal plane can be 20-50 degrees.

As a still further scheme of the invention: the air flow channel is arranged in a serpentine pipeline, and four metal foam carrier heat storage beds are arranged inside the heat insulation layer in a staggered mode.

As a still further scheme of the invention: the reaction bed metal clamping net comprises a fixed metal clamping net arranged on the inner side of the heat insulation layer, first metal foam is arranged inside the fixed metal clamping net, and an internal filling layer is filled inside the first metal foam.

As a still further scheme of the invention: the heat-conducting coefficient of the internal filling layer is about 0.65-0.8W/(m.K), magnesium chloride hexahydrate MgCl 2.6H2O, and the radius r is 0.001-0.030 m.

As a still further scheme of the invention: the first metal foam is copper metal foam, the porosity of the first metal foam ranges from 0.9 to 0.98, and the pore density ranges from 10 to 30 ppi.

As a still further scheme of the invention: the fixed metal clamping net comprises a lower plate arranged outside the internal filling layer, an upper plate is arranged outside the lower plate, and metal net layers are arranged inside the lower plate and the upper plate.

As a still further scheme of the invention: the ratio of the thickness of the reaction bed metal net to the width of the air flow channel is delta, the delta can be changed within the range of 0.6-1, the height H and the width D of the whole heat storage chimney are changed within the range of 2-1.3.

As a still further scheme of the invention: the manufacturing of the metal foam comprises a fifth manufacturing cup, a first manufacturing cup, a second manufacturing cup, a third manufacturing cup and a fourth manufacturing cup, solid hydrated salt is arranged inside the fifth manufacturing cup, a metal framework net is arranged inside the fifth manufacturing cup, second metal foam is arranged inside the metal framework net, metal foam pores are formed inside the second metal foam, molten hydrated salt is arranged inside the first manufacturing cup, liquid hydrated salt is arranged inside the second manufacturing cup, first solid hydrated salt is arranged inside the third manufacturing cup, second solid hydrated salt is arranged inside the fourth manufacturing cup, and the filled hydrated salt metal foam is taken out of the fourth manufacturing cup and then completed.

Compared with the prior art, the invention has the beneficial effects that: the invention aims to ensure that heated air fully transfers heat to a heat storage material through a snake-shaped flow channel structure and a metal foam matrix structure is added into a thermochemical reaction bed so as to improve the heat transfer condition of the chemical heat storage material, ensure the temperature distribution of the reaction bed layer to be uniform and ensure the chemical thermal desorption reaction to be carried out smoothly; meanwhile, the thickness of the reaction bed and the width delta of the baffling flow channel are changed within the range of 0.6-1, the snake-shaped flow channel fully utilizes the positive influence of the flow on heat transfer, and the reaction bed which is fixed in the chimney and takes metal foam as a carrier accelerates the heat transfer process. The invention fully utilizes the space in the reactor, and the efficiency of converting solar energy into heat energy is high; the reaction bed has higher specific surface area and better heat storage performance, and solves the problems of low specific surface area of the heat storage material of the existing reactor, uneven filling of the internal catalyst, difficult control of a temperature field and a flow field and the like.

Drawings

FIG. 1 is a schematic diagram of a solar chimney screen-type foamed metal salt hydrate regenerator;

FIG. 2 is a schematic structural diagram of a metal mesh layer of a reaction bed in a sieve plate type foam metal salt hydrate heat accumulator of a solar chimney;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic structural diagram of a fixed metal clamping net in a solar chimney sieve-plate type foam metal salt hydrate heat accumulator;

fig. 5 is a schematic diagram of a manufacturing process of metal foam in a solar chimney sieve-plate type foam metal salt hydrate heat accumulator.

In the figure: 1. an air inlet; 2. a solar absorber; 3. a glass cover; 4. a hot air outlet; 5. a heat insulating layer; 6. a metal foam carrier heat storage bed; 7. a reaction bed metal net; 8. an air flow passage; 9. a first metal foam; 10. an internal filling layer; 11. fixing the metal clamping net; 12. a metal mesh layer; 13. a lower plate; 14. an upper plate; 15. metal foam pores; 16. a second metal foam; 17. a metal skeleton mesh; 18. a solid hydrated salt; 19. a first preparation cup; 20. a molten hydrated salt; 21. a second manufacturing cup; 22. a liquid hydrated salt; 23. thirdly, making a cup; 24. a first solid hydrated salt; 25. a second solid hydrated salt; 26. fourthly, making a cup; 27. filling hydrated salt metal foam; 28. and fifthly, making the cup.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, in the embodiment of the present invention, the solar chimney sieve plate type foam metal salt hydrate heat accumulator includes a heat insulating layer 5, a hot air outlet 4 is disposed at a top end of the heat insulating layer 5, metal foam carrier heat accumulation beds 6 are installed inside the heat insulating layer 5 in a staggered manner, an air flow channel 8 is disposed inside the heat insulating layer 5, four metal foam carrier heat accumulation beds 6 are installed inside the heat insulating layer 5 in a staggered manner, a reaction bed metal sandwich net 7 is disposed outside the metal foam carrier heat accumulation bed 6, the reaction bed metal sandwich net 7 includes a fixed metal sandwich net 11 installed inside the heat insulating layer 5, a first metal foam 9 is disposed inside the fixed metal sandwich net 11, an inner filling layer 10 is filled inside the first metal foam 9, a magnesium chloride hexahydrate MgCl 2.6h 2O with a thermal conductivity coefficient of the inner filling layer 10 of about 0.65 to 0.8W/(m.k), a solid particle chemical heat storage material with radius r of 0.001-0.030 m, wherein the first metal foam 9 is copper metal foam, the porosity of the first metal foam 9 is 0.9-0.98, the pore density is 10-30 ppi, the fixed metal sandwich net 11 comprises a lower plate 13 arranged outside the internal filling layer 10, an upper plate 14 is arranged outside the lower plate 13, a metal net layer 12 is arranged inside the lower plate 13 and the upper plate 14, the ratio of the thickness of the reaction bed metal sandwich net 7 to the width of the air flow channel 8 is delta, the delta can be changed within the range of 0.6-1, the height H, the width D and the H/D of the whole heat storage chimney can be changed within the range of 2-1.3, a glass cover 3 is arranged at one side edge position of the heat insulation layer 5, a solar absorber 2 is arranged inside the glass cover 3, an air inlet 1 is arranged at one end of the glass cover 3, the glass cover 3 is cylindrical, the inclination angle theta of the glass cover 3 to the horizontal plane can be 20-50 DEG, the invention aims to ensure that heated air fully transfers heat to a heat storage material and a metal foam matrix structure is added into a thermochemical reaction bed through a snakelike air flow channel 8 structure so as to improve the heat transfer condition of the chemical heat storage material, ensure the temperature distribution of the reaction bed layer to be uniform and ensure the chemical thermal desorption reaction to be carried out smoothly, and the device comprises a linear solar absorber 2 which is arranged in a cylindrical glass cover 3 and effectively converts solar energy into heat energy; meanwhile, the ratio of the thickness of the reaction bed metal net 7 to the width of the air flow channel 8 is delta, the delta can be changed within the range of 0.6-1, the snakelike air flow channel 8 fully utilizes the positive influence of the flow on heat transfer, and the reaction bed metal net 7 which is fixed in the chimney and takes the first metal foam 9 as a carrier accelerates the heat transfer process.

In fig. 5: the manufacturing of the metal foam comprises a fifth manufacturing cup 28, a first manufacturing cup 19, a second manufacturing cup 21, a third manufacturing cup 23 and a fourth manufacturing cup 26, wherein solid hydrated salt 18 is arranged in the fifth manufacturing cup 28, a metal skeleton net 17 is arranged in the fifth manufacturing cup 28, second metal foam 16 is arranged in the metal skeleton net 17, metal foam pores 15 are formed in the second metal foam 16, molten hydrated salt 20 is arranged in the first manufacturing cup 19, liquid hydrated salt 22 is arranged in the second manufacturing cup 21, first solid hydrated salt 24 is arranged in the third manufacturing cup 23, second solid hydrated salt 25 is arranged in the fourth manufacturing cup 26, the fourth manufacturing cup 26 is taken out from the inside of the fourth manufacturing cup 26 and filled with hydrated salt metal foam 27, the working process can put the second metal foam 16 into the heat storage material of the molten hydrated salt 20, after cooling and solidification, the wall surface of the container is heated again to melt the second solid hydrated salt 25 near the wall surface, and then the metal hydrated salt block is taken out and further condensed to finally obtain the unit heat storage bed layer taking the metal foam as the carrier.

The working principle of the invention is as follows: air enters the glass cover 3 and the solar absorber 2 from the air inlet 1 and is heated, then hot air flows into a chimney structure and passes through the metal foam carrier heat storage bed 6 along the snake-shaped air flow channel 8, the metal foam carrier heat storage bed 6 comprises a peripheral reaction bed metal net 7, first metal foam 9 and an internal filling layer 10 filled in the first metal foam 9, heat transfer between hot air flow and the metal foam carrier heat storage bed 6 is carried out along the air flow channel 8 and the porous metal foam carrier heat storage bed 6, therefore, heat is stored in the bed layer, the air flow channel 8 structure of the metal foam carrier heat storage bed increases the contact area of the hot air and the metal foam carrier heat storage bed 6, enhances the heat transfer, and the metal foam carrier structure is also a porous structure, promotes the convection heat transfer between the air and the air in the porous structure of the metal foam carrier heat storage bed 6, meanwhile, the contact area of the metal foam with larger heat conductivity coefficient and the heat storage material is increased, so that the heat transfer efficiency is increased, the heat transfer condition of the chemical heat storage material is improved, the temperature distribution of the metal foam carrier heat storage bed 6 is uniform, the chemical heat desorption reaction is ensured to be carried out smoothly, meanwhile, in the manufacturing process of the second metal foam 16 filled with the heat storage material, the second metal foam 16 is put into the heat storage material of the molten hydrated salt 20, after cooling and solidification, the wall surface of the container is heated, so that the solid hydrated salt near the wall surface is melted, the metal hydrated salt block is taken out and further condensed, and finally, the unit heat storage bed layer taking the metal foam as the carrier is obtained, in the invention, the water and salt heat storage material with low heat conductivity coefficient is put into the second metal foam 16, and the second metal foam 16 is a heat transfer medium with good heat conduction performance, so that the temperature required by the chemical heat, the heat storage efficiency is improved, so that the condition that the heat storage amount is small or even no reaction occurs due to low heat conductivity coefficient of the heat storage material is overcome. Therefore, the present invention can realize efficient heat storage.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.