WO2021203676A1

WO2021203676A1 - Energy-storage wall and solar greenhouse

Info

Publication number: WO2021203676A1
Application number: PCT/CN2020/122858
Authority: WO
Inventors: 李清清
Original assignee: 青岛农业大学
Priority date: 2020-04-09
Filing date: 2020-10-22
Publication date: 2021-10-14
Also published as: CN111448915A; ZA202109375B; AU2020101308A4

Abstract

An energy-storage wall (10). The energy-storage wall (10) comprises a wall body (1), a heat-absorbing pipe layer (2), a heat-storage pipe layer (3), a first connecting pipe (4) and a second connecting pipe (5); the heat-absorbing pipe layer (2) is laid on a side surface of the wall body (1) in the thickness direction, the heat-storage pipe layer (3) is laid inside the wall body (1), the upper end of the heat-absorbing pipe layer (2) is connected to the upper end of the heat-storage pipe layer (3) by means of the first connecting pipe (4), the lower end of the heat-absorbing pipe layer (2) is connected to the lower end of the heat-storage pipe layer (3) by means of the second connecting pipe (5), so that the heat-absorbing pipe layer (2) is in communication with the heat-storage pipe layer (3) to form a heat-transfer pipeline, a fluid heat-transfer medium is provided in the heat-transfer pipeline, and the fluid heat-transfer medium can circularly flow in the heat-transfer pipeline under the action of a temperature difference. The wall can effectively transfer heat emitted by the sun to the interior of the wall body and store the heat by the wall body, thereby effectively improving the heat storage amount of the wall body. Also included is a solar greenhouse.

Description

Energy storage wall and solar greenhouse

References to related applications

The present invention claims the priority of the invention patent application named "energy storage wall and solar greenhouse" and application number 202010275472.3 filed in China on April 9, 2020, and the entire content of the application is incorporated herein by reference.

Technical field

The invention relates to the technical field of agricultural facilities, in particular to an energy storage wall and a solar greenhouse.

Background technique

Sunlight greenhouse is a kind of professional equipment widely used in vegetable production. In the wall of the solar greenhouse, due to the thermal performance of the wall material and structural reasons, there is a stable layer with a lower temperature at a depth of about 200 to 300 mm from the inner surface of the wall, usually the temperature is not higher than 10 ℃, The existence of this layer of low temperature zone greatly limits the heat storage of the wall, which will adversely affect the thermal environment of the solar greenhouse.

Summary of the invention

Based on the above-mentioned defects in the prior art, the object of the present invention is to provide an energy storage wall capable of improving the heat storage of the wall and a solar greenhouse with the energy storage wall.

To this end, the present invention provides the following technical solutions.

The invention provides an energy storage wall. The energy storage wall includes a wall body, a heat absorption tube layer, a heat storage tube layer, a first connecting tube and a second connecting tube.

The heat absorption tube layer is laid on one side surface in the thickness direction of the wall body, and the heat storage tube layer is laid on the inside of the wall body,

The upper end of the heat absorption tube layer and the upper end of the heat storage tube layer are connected by the first connecting tube, and the lower end of the heat absorption tube layer and the lower end of the heat storage tube layer are connected by the second connecting tube, So that the heat absorption tube layer and the heat storage tube layer are connected to form a heat transfer pipeline,

A fluid heat transfer medium is arranged in the heat transfer pipeline, and the fluid heat transfer medium can circulate in the heat transfer pipeline under the action of a temperature difference.

In at least one embodiment, the heat absorption tube layer and the heat storage tube layer are arranged opposite to each other in the thickness direction of the wall body.

In at least one embodiment, in the pipe section of the first connecting pipe arranged along the thickness direction of the wall body, the end of the pipe section close to the heat absorption tube layer is higher than the end of the pipe section close to the heat storage tube One end of the layer.

In at least one embodiment, the energy storage wall further includes a thermal insulation layer, and the thermal insulation layer is provided at least on the other side surface in the thickness direction of the wall body and the upper end surface of the wall body.

In at least one embodiment, the heat absorption tube layer includes a plurality of heat absorption tubes, and the plurality of heat absorption tubes are spaced apart along the length direction of the wall body.

In at least one embodiment, the heat storage tube layer includes a plurality of heat storage tubes, and the plurality of heat storage tubes are arranged at intervals along the length direction of the wall body.

In at least one embodiment, the number of heat absorption tubes in the heat absorption tube layer is equal to the number of heat storage tubes in the heat storage tube layer.

In at least one embodiment, the surface of the heat absorption tube layer is black.

In at least one embodiment, the heat absorption tube layer and/or the heat storage tube layer are vertically arranged.

The present invention also provides a solar greenhouse, which comprises the energy storage wall according to any one of the above embodiments, and the one side surface is located inside the solar greenhouse.

By adopting the above technical solution, the present invention provides an energy storage wall. By arranging the heat absorption tube layer on the surface of the wall body and the heat storage tube layer inside the wall body, the heat from the sun can be effectively transmitted to The interior of the wall body is stored by the wall body, which can effectively increase the heat storage of the wall body.

It can be understood that the solar greenhouse with the energy storage wall has the same beneficial effects.

Description of the drawings

Figure 1 shows a schematic diagram of the structure of a solar greenhouse according to the present invention.

Fig. 2 shows a cross-sectional view taken along the line A in Fig. 1.

Fig. 3 shows a structural diagram of the energy storage wall according to the present invention.

Description of Reference Signs

10 energy storage wall; 20 roof; 30 greenhouse space;

1 wall body; 2 heat absorption tube layer; 21 heat absorption tube; 3 heat storage tube layer; 31 heat storage tube;

4 The first connecting pipe; 41 the upper heat absorption header section; 42 the upper heat storage header section; 43 the upper connecting pipe section;

5 second connecting pipe; 51 lower side heat absorption header section; 52 lower side heat storage header section; 53 lower side connecting pipe section;

6 insulation layer.

Detailed ways

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present invention, and are not used to exhaust all possible ways of the present invention, nor are they used to limit the protection scope of the present invention.

The specific implementation of the solar greenhouse according to the present invention will be described in detail below with reference to FIGS. 1 to 3.

In this embodiment, as shown in Figure 1, the solar greenhouse includes an energy storage wall 10 and a roof 20. The energy storage wall 10 and the roof 20 are combined to form a closed greenhouse space 30. The greenhouse space 30 is used for vegetables and other plants. Grow.

In this embodiment, as shown in Figures 1, 2 and 3, the energy storage wall 10 includes a wall body 1, a heat absorption tube layer 2, a heat storage tube layer 3, a first connecting pipe 4, and a second connecting pipe 5.和Insulation layer6.

The heat absorption tube layer 2 includes a heat absorption tube 21, and the heat absorption tube 21 is laid on a side surface of the wall body 1 close to the greenhouse space 30 in the thickness direction. Among them, there may be multiple heat absorbing tubes 21, and the multiple heat absorbing tubes 21 are arranged at intervals along the length direction of the wall body 1. The heat absorption tube 21 may be arranged vertically, or may be arranged at a certain angle with the vertical direction.

The heat storage tube layer 3 includes a heat storage tube 31, and the heat storage tube 31 is vertically laid inside the wall body 1. Among them, there may be multiple heat storage tubes 31, and the multiple heat storage tubes 31 are arranged at intervals along the length direction of the wall body 1. The heat storage tube 31 may be arranged vertically, or may be arranged at a certain angle with the vertical direction.

It should be understood that the heat storage tube layer 3 may be arranged in one row in the thickness direction of the wall body 1 (as shown in FIG. 1), or may be arranged in multiple rows.

In this embodiment, the heat storage tube layer 3 may be arranged at a distance of 200-300 mm from the side surface of the wall body 1 where the heat absorption tube layer 2 is provided. In this way, it is beneficial for the stable layer with a lower temperature to store heat.

The upper end of the heat absorption tube layer 2 and the upper end of the heat storage tube layer 3 are connected by a first connecting tube 4, and the lower end of the heat absorption tube layer 2 and the lower end of the heat storage tube layer 3 are connected by a second connecting tube 5, so that the mutually connected heat absorption The tube layer 2 and the heat storage tube layer 3 form a heat transfer pipeline. Wherein, a fluid heat transfer medium (for example, water or oil) is provided in the heat transfer pipeline, and the fluid heat transfer medium can circulate in the heat transfer pipeline.

In this embodiment, as shown in FIG. 3, the heat absorption tube 21 and the heat storage tube 31 are arranged opposite to each other in the thickness direction of the wall body 1. The heat absorption tubes 21 and the heat storage tubes 31 can be arranged in a one-to-one correspondence, and the number of the heat absorption tubes 21 and the heat storage tubes 31 can be equal. Of course, the present invention is not limited to this, and the number of heat absorption tubes 21 and heat storage tubes 31 may also be different.

It can be understood that each heat absorption tube 21 and the corresponding heat storage tube 31 may be connected by a set of connecting tubes (one connecting tube on top and bottom), or there may be multiple heat absorption tubes 21 and multiple heat storage tubes. 31 are connected by a set of connecting pipes (one connecting pipe on top and bottom).

In the case that a heat absorption tube 21 and a corresponding heat storage tube 31 are connected by a set of connecting tubes (one upper and lower connecting tube), the connecting tube may extend substantially along the thickness direction of the wall body 1 Straight.

In the case where the plurality of heat absorption tubes 21 and the plurality of heat storage tubes 31 are connected by a set of connecting tubes (one upper and lower connecting tube), the first connecting tube 4 on the upper side may include a length substantially along the wall body 1. The upper heat absorbing header section 41, the upper heat storage header section 42 and the upper connecting pipe section 43 extending substantially along the thickness direction of the wall body 1 extend in the direction. The upper ends of the plurality of heat absorption tubes 21 are connected to the upper heat absorption header section 41, the upper ends of the plurality of heat storage tubes 31 are connected to the upper heat storage header section 42, and the upper connecting pipe section 43 connects the upper heat absorption header section 41 and the upper Side heat storage header section 42. The second connecting pipe 5 on the lower side may include a lower heat absorption header section 51 extending substantially along the length direction of the wall body 1, a lower heat storage header section 52, and a lower side substantially extending along the thickness direction of the wall body 1. Connect pipe section 53. The lower ends of the plurality of heat absorption tubes 21 are connected to the lower heat absorption header section 51, the lower ends of the plurality of heat storage tubes 31 are connected to the lower heat storage header section 52, and the lower connecting pipe section 53 connects the lower heat absorption header section 51 and the lower Side heat storage header section 52.

As shown in Fig. 3, the first connecting pipe 4 and the second connecting pipe 5 may be straight pipes, or bend pipes in a U-shape or an I-shape.

In this embodiment, when the first connecting tube 4 is a straight tube, the end of the first connecting tube 4 connected to the heat absorption tube 21 may be higher than the end of the first connecting tube 4 connected to the heat storage tube 31. Optionally, the slope formed by the first connecting pipe 4 may be 1%.

In the case where the first connecting pipe 4 is U-shaped or I-shaped, the end of the above-mentioned upper connecting pipe section 43 close to the heat absorption tube 21 may be higher than its end close to the heat storage tube 31. Optionally, the slope formed by the upper connecting pipe section 43 may be 1%.

In this embodiment, the surface of the heat absorption tube 21 may be painted black. In this way, it is beneficial to strengthen the absorption of solar energy by the heat absorption tube 21.

In this embodiment, as shown in FIGS. 1 and 2, the thermal insulation layer 6 is provided on the side surface of the wall body 1 facing away from the greenhouse space 30 and on the upper end surface of the wall body 1. In this way, it is possible to reduce the heat accumulated in the wall body 1 from dissipating to the outside.

In this embodiment, an exhaust device (for example, an exhaust valve) may be provided on the top of the heat absorption pipe layer 2.

The working principle of the energy storage wall according to the present invention will be described below.

In the daytime, after the heat absorption tube layer 2 absorbs the heat of solar radiation (as shown by the arrow in Figure 1), the temperature rises, and the fluid heat transfer medium (for example, water or oil) in the heat absorption tube layer 2 becomes denser after being heated. Small, the fluid heat transfer medium relies on buoyancy to enter the heat storage tube layer 3, the fluid heat transfer medium releases heat in the heat storage tube layer 3 to the wall body 1, and then the temperature of the fluid heat transfer medium decreases, the density increases, and flows back down to absorb heat Tube layer 2. In this way, the heat can be stored inside the wall body 1 by reciprocating.

At night, the heat in the wall body 1 is dissipated into the heat storage tube layer 3. The fluid heat transfer medium in the heat storage tube layer 3 becomes less dense after being heated, and the fluid heat transfer medium flows upward into the heat absorption tube layer 2 and The heat is released into the greenhouse space 30. After the fluid heat transfer medium releases heat, the temperature decreases, the density increases, and it flows downwards into the heat storage tube layer 3. In this way, the heat accumulated in the wall body 1 can be released into the greenhouse space 30 to meet the growth requirements of plants such as vegetables in the greenhouse space 30.

It can be understood that according to the energy storage wall of the present invention, the fluid heat transfer medium can naturally convection under the force formed by the temperature difference, and can store solar energy in the wall body, and can also release the heat in the wall body into the greenhouse space.

By adopting the above technical solution, the energy storage wall according to the present invention has at least the following advantages:

(1) In the energy storage wall of the present invention, the heat absorption tube layer is provided on the surface of the wall body and the heat storage tube layer is arranged inside the wall body, which can effectively transmit the heat from the sun to the inside of the wall body. And it is stored by the wall body, which can effectively increase the heat storage of the wall body.

(2) In the energy storage wall of the present invention, the surface of the heat absorption tube is painted black, which is beneficial to strengthen the absorption of solar energy by the heat absorption tube.

Claims

An energy storage wall (10), characterized in that the energy storage wall (10) comprises a wall body (1), a heat absorption tube layer (2), a heat storage tube layer (3), and a first connecting tube ( 4) and the second connecting pipe (5),

The heat absorption tube layer (2) is laid on one side surface in the thickness direction of the wall body (1), and the heat storage tube layer (3) is laid on the inside of the wall body (1),

The upper end of the heat absorption tube layer (2) and the upper end of the heat storage tube layer (3) are connected by the first connecting tube (4), and the lower end of the heat absorption tube layer (2) is connected to the heat storage tube The lower end of the layer (3) is connected by the second connecting pipe (5), so that the heat absorption tube layer (2) and the heat storage tube layer (3) are connected to form a heat transfer pipeline,

A fluid heat transfer medium is arranged in the heat transfer pipeline, and the fluid heat transfer medium can circulate in the heat transfer pipeline under the action of a temperature difference.
The energy storage wall (10) according to claim 1, wherein the heat absorption tube layer (2) and the heat storage tube layer (3) face each other in the thickness direction of the wall body (1) set up.
The energy storage wall (10) according to claim 1, characterized in that, among the pipe sections of the first connecting pipe (4) arranged along the thickness direction of the wall body (1), the pipe section is close to the One end of the heat absorption tube layer (2) is higher than the end of the tube section close to the heat storage tube layer (3).
The energy storage wall (10) according to claim 1, wherein the energy storage wall (10) further comprises an insulation layer (6), and the insulation layer (6) is provided at least on the wall body (1) the other side surface in the thickness direction and the upper end surface of the wall body (1).
The energy storage wall (10) according to claim 1, wherein the heat absorption tube layer (2) comprises a plurality of heat absorption tubes (21), and the plurality of heat absorption tubes (21) are along the wall The main body (1) is arranged at intervals in the length direction.
The energy storage wall (10) according to claim 1, wherein the heat storage tube layer (3) comprises a plurality of heat storage tubes (31), and the plurality of heat storage tubes (31) are arranged along the wall body (1). ) Are arranged at intervals in the length direction.
The energy storage wall (10) according to claim 1, wherein the number of heat absorption tubes (21) in the heat absorption tube layer (2) is equal to the number of heat storage tubes (3) in the heat storage tube layer (3). The number of heat pipes (31) is equal.
The energy storage wall (10) according to claim 1, wherein the surface of the heat absorption tube layer (2) is black.
The energy storage wall (10) according to claim 1, wherein the heat absorption tube layer (2) and/or the heat storage tube layer (3) are arranged vertically.
A solar greenhouse, characterized in that, the solar greenhouse comprises the energy storage wall (10) according to any one of claims 1 to 9, and the one side surface is located inside the solar greenhouse .