Heat absorption pipe and heat absorber thereof

Abstract

The utility model discloses a heat absorbing tube and a heat absorber thereof, which relate to the technical field of solar photo-thermal power generation, are used for the heat absorber, and comprise a tube body and auxiliary heat absorbing plates, and the auxiliary heat absorbing plates are arranged on two axial sides of the tube body and are attached to the outer side wall of the tube body. According to the utility model, the absorption capacity of sunlight is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solar thermal power generation, in particular to a heat absorbing tube and a heat absorber thereof. Background Art

[0002] The absorber is an important component of the solar thermal power generation system. It is used to absorb sunlight reflected from the heliostat. The heat medium flows in the absorber's heat absorption tube, takes away the heat, and then heats the water to obtain water vapor, which drives the steam turbine to generate electricity. Therefore, increasing the irradiation area of ​​the absorber can increase the absorption of solar energy from the source to increase the power generation. In the prior art, the absorber's heat absorption tube adopts a circular tube, and the sunlight can only irradiate the surface area of ​​half a circle, resulting in a very limited amount of sunlight absorption. In addition, the surface of the other half of the circle is the backlit surface, resulting in a temperature difference between the light-facing surface and the backlit surface. Generally, the temperature of the absorber surface can be as high as 600 degrees. Under the action of the temperature difference, the absorber tube will deform and rupture. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model provides a heat absorbing tube, which greatly increases the absorption of sunlight.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A heat absorbing tube, used for a heat absorber, comprises a tube body, the heat absorbing tube also comprises auxiliary heat absorbing plates, the auxiliary heat absorbing plates are arranged on both sides of the tube body in the axial direction, and the plane where the auxiliary heat absorbing plates are located is in contact with the outer side wall of the tube body.

[0006] Optionally, the auxiliary heat absorbing plate comprises a light-facing surface and a backlight surface, the plate surfaces opposite to each other of the two auxiliary heat absorbing plates are the backlight surfaces, and the plate surfaces on the other side are the light-facing surfaces.

[0007] The technical solution provided by the utility model increases the irradiation area of ​​the light-facing surface through the auxiliary heat absorption plate, thereby increasing the absorption amount of sunlight, thereby improving the power generation.

[0008] Optionally, the angle between the plate surface of the auxiliary heat absorbing plate and the horizontal plane is 90 to 120 degrees.

[0009] Optionally, the width of the auxiliary heat absorbing plate satisfies the following conditions:

[0010] R≤L≤2R

[0011] Wherein, L is the width of the auxiliary heat absorbing plate, and R is the radius of the tube body.

[0012] By setting the angle and width, the heat absorbing tube can achieve the smallest external dimensions while increasing the radiation area, thus reducing the difficulty and cost of transportation.

[0013] Optionally, the auxiliary heat absorbing plate is one of a low carbon steel auxiliary heat absorbing plate, a high carbon steel auxiliary heat absorbing plate, a stainless steel auxiliary heat absorbing plate and an alloy steel auxiliary heat absorbing plate.

[0014] Optionally, the heat absorbing tube further comprises heat dissipation ribs, wherein the heat dissipation ribs are arranged between two auxiliary heat absorbing plates and are arranged at intervals in the axial direction of the tube body.

[0015] Optionally, the plate surface of the heat dissipation rib is perpendicular to the axis of the tube body.

[0016] The heat dissipation ribs enhance the convection and radiation heat dissipation of the backlight side of the heat absorption tube, avoiding excessive temperature difference of the heat absorption tube. At the same time, the heat dissipation ribs also play a role in reinforcing the structure of the auxiliary heating plate.

[0017] In addition, the utility model also provides a heat absorber, comprising the heat absorption tube described in any one of the above items.

[0018] The beneficial effects of the heat absorber provided by the present invention are similar to the beneficial effects of the aforementioned heat absorption tube in the reasoning process, which will not be repeated here.

[0019] These features and advantages of the utility model will be disclosed in detail in the following specific embodiments and drawings. The best implementation or means of the utility model will be fully presented in conjunction with the drawings, but it is not a limitation of the technical solution of the utility model. In addition, these features, elements and components appearing in each of the following texts and drawings are multiple, and are marked with different symbols or numbers for convenience, but all represent components with the same or similar structure or function. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the light-facing side of the heat absorbing tube in the first embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of the relative positions of the auxiliary heat absorbing plate and the tube body in the first embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the heat dissipation ribs in the second embodiment of the present utility model;

[0024] Figure 4 This is a distribution diagram of the heat dissipation ribs in the second embodiment of the present utility model.

[0025] Among them, 1-tube body, 2-auxiliary heat absorption plate, 3-heat dissipation ribs, 4-sunlight. DETAILED DESCRIPTION

[0026] The following is a detailed description of embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments in the implementation manner are intended to be used to explain the present invention and should not be construed as limiting the present invention.

[0027] References in this specification to "one embodiment" or "an example" or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment itself may be included in at least one embodiment of the present patent disclosure. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0028] Embodiment 1:

[0029] This embodiment provides a heat absorption tube for a heat absorber, specifically, a heat absorber for a solar thermal power generation system.

[0030] The heat absorbing tube provided in this embodiment includes a tube body 1 and an auxiliary heat absorbing plate 2. The auxiliary heat absorbing plate 2 is one of a low carbon steel auxiliary heat absorbing plate 2, a high carbon steel auxiliary heat absorbing plate 2, a stainless steel auxiliary heat absorbing plate 2 and an alloy steel auxiliary heat absorbing plate 2, which are not limited here. Figure 1 As shown, the auxiliary heat absorbing plate 2 is arranged on both sides of the tube body 1 in the axial direction, and the plane where the auxiliary heat absorbing plate 2 is located is in contact with the outer wall of the tube body 1. The length of the tube body 1 is the length of the auxiliary heat absorbing plate 2. The auxiliary heat absorbing plate 2 includes a light-facing surface and a light-repelling surface. The plate surfaces opposite to the two auxiliary heat absorbing plates 2 are the light-repelling surfaces, and the plate surfaces on the other side are the light-facing surfaces. Specifically, on the cross section of the heat absorbing tube, the auxiliary heat absorbing plate 2 and the partial arc of the tube body 1 form a U-shape, and the inner surface of the U-shape and the partial arc that does not form a U-shape with the auxiliary heat absorbing plate 2 are the light-repelling surfaces; the outer surface of the U-shape is the light-facing surface, which is exposed to sunlight.

[0031] In the prior art, only half of the surface area of ​​the heat absorber is the light-facing surface. Assuming that the diameter of the tube body 1 is 100 mm and the length is 1000 mm, the area of ​​the light-facing surface of the heat absorber in the prior art is:

[0032] π×100×1000×0.5=157000m 2

[0033] By adopting the technical solution provided in this embodiment, an auxiliary heat absorbing plate 2 is added, and the width of the auxiliary heat absorbing plate 2 is preset to be 50 mm, and the length is the same as that of the tube body 1, which is also 1000 mm. Then, the area of ​​the light-facing surface in this embodiment is:

[0034] π×100×1000×0.5+50*1000*2=257000mm 2

[0035] The added light-facing area is 50*1000*2=100000mm 2 , the increased proportion of the light-facing surface is 100000 / 157000*100%=63.7%. It can be seen that the auxiliary heat absorption plate 2 greatly increases the irradiation area of ​​the light-facing surface, thereby increasing the absorption of sunlight and thus increasing the power generation.

[0036] like Figure 2 As shown, the angle A between the plate surface of the auxiliary heat absorbing plate 2 and the horizontal plane satisfies the following conditions:

[0037] 90°≤A≤120°

[0038] The width of the auxiliary heat absorbing plate 2 satisfies the following conditions:

[0039] R≤L≤2R

[0040] Wherein, L is the width of the auxiliary heat absorbing plate 2, and R is the radius of the tube body 1. By setting the angle and width, the heat absorbing tube can achieve the smallest size while increasing the radiation area, thereby reducing the difficulty and cost of transportation.

[0041] At the same time, this embodiment also provides a heat absorber, including the aforementioned heat absorption tube.

[0042] Embodiment 2

[0043] The difference between this embodiment and the first embodiment is that in this embodiment, the heat absorbing tube further includes a heat dissipation rib 3. Figure 3 and Figure 4 As shown, the heat dissipation ribs 3 are arranged between the two auxiliary heat absorbing plates 2, and the plate surface thereof is perpendicular to the axis of the tube body 1, and is arranged at intervals in the axial direction of the tube body 1. The heat dissipation ribs 3 enhance the convection heat dissipation and radiation heat dissipation of the backlight surface of the heat absorbing tube, and avoid deformation and rupture of the tube body 1 caused by excessive temperature difference of the heat absorbing tube. At the same time, the heat dissipation ribs 3 also play a role in reinforcing the structure of the auxiliary heating plate.

[0044] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A heat absorbing tube, used for a heat absorber, comprising a tube body, characterized in that: The heat absorbing tube further comprises auxiliary heat absorbing plates, which are arranged on both sides of the tube body in the axial direction, and the plane where the auxiliary heat absorbing plates are located is in contact with the outer side wall of the tube body.

2. The heat absorbing tube according to claim 1, characterized in that: The auxiliary heat absorbing plate comprises a light-facing surface and a backlight surface. The plate surfaces opposite to each other of the two auxiliary heat absorbing plates are the backlight surfaces, and the plate surfaces on the other side are the light-facing surfaces.

3. The heat absorbing tube according to claim 1, characterized in that: The angle between the plate surface of the auxiliary heat absorbing plate and the horizontal plane is 90 to 120 degrees.

4. The heat absorbing tube according to claim 1, characterized in that: The width of the auxiliary heat absorbing plate meets the following conditions: R≤L≤2R Wherein, L is the width of the auxiliary heat absorbing plate, and R is the radius of the tube body.

5. The heat absorbing tube according to claim 1, characterized in that: The auxiliary heat absorbing plate is one of a low carbon steel auxiliary heat absorbing plate, a high carbon steel auxiliary heat absorbing plate, a stainless steel auxiliary heat absorbing plate and an alloy steel auxiliary heat absorbing plate.

6. The heat absorbing tube according to any one of claims 1 to 5, characterized in that: The heat absorbing tube further comprises a heat dissipation rib plate, which is arranged between two auxiliary heat absorbing plates and spaced apart in the axial direction of the tube body.

7. The heat absorbing tube according to claim 6, characterized in that: The plate surface of the heat dissipation rib plate is perpendicular to the axis of the tube body.

8. A heat absorber, characterized in that: The heat absorber comprises the heat absorption tube according to any one of claims 1 to 7.

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