阅读说明：本技术 一种带风幕屏的塔式吸热器的控制方法 (Control method of tower type heat absorber with air curtain screen ) 是由 王其梁 杨洪兴 姚尧 沈志成 于 2021-09-13 设计创作，主要内容包括：本发明公开了一种带风幕屏的塔式吸热器的控制方法,带风幕屏的塔式吸热器包括：吸热装置；上风幕结构,设置在所述吸热装置的上部,并向下出风；下风幕结构,设置在所述吸热装置的下部,并向上出风；其中,所述上风幕结构的出风和所述下风幕结构的出风形成风幕屏；所述控制方法包括：获取所述吸热装置所处环境的风流信息；根据所述风流信息,启动所述上风幕结构和所述下风幕结构以形成风幕屏。由于通过控制上风幕结构和下风幕结构启动形成风幕屏,风幕屏阻挡住外来高流速空气横掠吸热装置的表面,可在吸热装置表面形成低对流环境或者无风环境,大大降低了对流换热,从而大幅降低吸热装置的对流热损失。(The invention discloses a control method of a tower type heat absorber with an air curtain screen, which comprises the following steps: a heat sink; the upper air curtain structure is arranged at the upper part of the heat absorption device and discharges air downwards; the lower air curtain structure is arranged at the lower part of the heat absorption device and exhausts air upwards; the air outlet of the upper air curtain structure and the air outlet of the lower air curtain structure form an air curtain screen; the control method comprises the following steps: acquiring wind flow information of the environment where the heat absorption device is located; and starting the upper air curtain structure and the lower air curtain structure according to the air flow information to form an air curtain screen. Because the air curtain screen is formed by controlling the starting of the upper air curtain structure and the lower air curtain structure, the air curtain screen blocks external high-flow-rate air from transversely sweeping the surface of the heat absorber, a low-convection environment or a windless environment can be formed on the surface of the heat absorber, the convection heat transfer is greatly reduced, and the convection heat loss of the heat absorber is greatly reduced.)

1. A control method for a tower type heat absorber with an air curtain screen is characterized in that the tower type heat absorber with the air curtain screen comprises the following steps:

a heat sink;

the upper air curtain structure is arranged at the upper part of the heat absorption device and discharges air downwards;

the lower air curtain structure is arranged at the lower part of the heat absorption device and exhausts air upwards;

the air outlet of the upper air curtain structure and the air outlet of the lower air curtain structure form an air curtain screen;

the control method comprises the following steps:

acquiring wind flow information of the environment where the heat absorption device is located;

and starting the upper air curtain structure and the lower air curtain structure according to the air flow information to form an air curtain screen.

2. The method of claim 1, wherein the upper curtain structure comprises:

the upper air curtain components are arranged around the heat absorber; the windward curtain assembly comprises:

the upper truss structure is arranged on the heat absorption device;

the upper air curtain machine is arranged on the upper truss structure;

the air outlet of the upper air curtain machine inclines towards one side far away from the heat absorption device;

the lower air curtain structure comprises:

the lower air curtain components are arranged around the heat absorber; the lower curtain assembly comprises:

the lower truss structure is arranged on the heat absorption device;

the lower air curtain machine is arranged on the lower truss structure;

and the air outlet of the lower air curtain machine inclines towards one side far away from the heat absorption device.

3. The method for controlling a tower heat absorber with an air curtain shield as claimed in claim 2, wherein the wind flow information includes wind direction information, and the activating the upper air curtain structure and the lower air curtain structure to form the air curtain shield according to the wind flow information includes:

and starting the upper air curtain machine and the lower air curtain machine corresponding to the wind direction information according to the wind direction information to form an air curtain screen.

4. The method for controlling a tower-type heat absorber with an air curtain shield as claimed in claim 2, wherein the wind flow information includes wind speed information, and the starting the upper air curtain structure and the lower air curtain structure to form the air curtain shield according to the wind flow information includes:

determining the wind speed of the upper wind curtain machine and the wind speed of the lower wind curtain machine according to the wind speed information;

and starting the upper air curtain machine and the lower air curtain machine to form an air curtain screen according to the air speed of the upper air curtain machine and the air speed of the lower air curtain machine.

5. The method for controlling a tower heat absorber with an air curtain shield as claimed in claim 2, wherein the upper air curtain machine is rotatably connected to the upper truss structure, and the upper air curtain machine rotates away from the heat absorber;

the lower air curtain machine is rotationally connected with the lower truss structure and rotates towards the direction far away from the heat absorption device;

the control method further comprises the following steps:

and continuously acquiring the air flow information of the environment where the heat absorption device is located, and adjusting the inclination angle and the air speed of the upper air curtain machine and the inclination angle and the air speed of the lower air curtain machine according to the air flow information until the tower type heat absorber with the air curtain screen is closed.

6. The method of controlling a tower heat absorber with an air curtain shield as recited in claim 2, wherein the upper air curtain assembly further comprises:

the upper light baffle plate is arranged on the upper truss structure and is positioned on one side of the upper air curtain machine, which is far away from the heat absorption device;

the lower air curtain assembly further comprises:

the lower light baffle plate is arranged on the lower truss structure and is positioned on one side of the lower air curtain machine, which is far away from the heat absorption device;

wherein the lower light baffle extends to below the heat sink.

7. The method for controlling a tower-type heat absorber with an air curtain screen according to claim 6, wherein the upper truss structure, the upper air curtain machine, the upper light baffle plate, the lower truss structure, the lower air curtain machine and the lower light baffle plate are all provided with a thermal insulation material layer; and/or

The upper truss structure, the upper light baffle plate, the lower truss structure and the lower light baffle plate are all made of stainless steel components.

8. The method of controlling a tower heat absorber with an air curtain shield as recited in claim 6 wherein the upper truss structure comprises:

a first upper truss and a second upper truss; the first end of the first upper truss and the first end of the second upper truss are both arranged on the heat sink, and the distance between the first end of the first upper truss and the first end of the second upper truss is smaller than the distance between the second end of the first upper truss and the second end of the second upper truss; and/or

The lower truss structure includes:

a first lower truss and a second lower truss; the first end of the first lower truss and the first end of the second lower truss are both arranged on the heat sink, and the distance between the first end of the first lower truss and the first end of the second lower truss is smaller than the distance between the second end of the first lower truss and the second end of the second lower truss.

9. The method of controlling a tower heat absorber with an air curtain shield as recited in claim 2, wherein the upper air curtain assembly further comprises:

the upper heat shield is arranged on the upper truss structure and is positioned between the upper air curtain machine and the heat absorption device;

the lower air curtain assembly further comprises:

and the lower heat shield is arranged on the lower truss structure and is positioned between the lower air curtain machine and the heat absorbing device.

10. The method of controlling a tower heat absorber with an air curtain shield as set forth in any one of claims 2-9 wherein the heat absorber means comprises:

the upper header is connected with the upper truss structure;

the heat absorption pipe assembly is connected with the upper header;

and the lower header is connected with the lower truss structure.

Technical Field

The invention relates to the field of solar high-temperature heat collection and utilization, in particular to a control method of a tower type heat absorber with an air curtain screen.

Background

Solar high-temperature heat collection is an important renewable energy heat utilization mode at present, and the main technical forms comprise groove type, tower type, disc type and Fresnel type light-gathering heat collection modes. The tower type light-gathering and heat-collecting device has the advantages of high heat-collecting temperature (550-. The tower type light and heat collecting system mainly comprises a tower type heat absorber, a condensing lens, a tracking device and the like.

In the prior art, the tower-type heat absorber is located at the center of the condenser field, and because the condenser field is large, the heat absorber is generally located at a height of 100 meters or even hundreds of meters to receive the condensed light reflected by the condenser field. Because the high-altitude wind speed is higher (more than 10m/s), when wind transversely grazes the tower type heat absorber, the heat convection coefficient between the tower type heat absorber and the air is higher, and the heat convection between the tower type heat absorber and the environment is enhanced, thereby causing the great heat convection loss of the tower type heat absorber. Research shows that the heat collection efficiency of the tower type heat absorber is reduced by about 2.1 percent due to a large amount of convective heat loss when the wind speed is increased by 3 m/s. The operation working medium in the heat absorption pipe assembly of the tower type heat absorber is generally molten salt (a mixture of potassium nitrate and sodium nitrate) with a condensation point of about 220 ℃, so that in order to prevent the working medium from condensing at night, the molten salt working medium is usually kept at a temperature of above 220 ℃ by adopting an electric heating method at night and slowly flows in the tower type heat absorber. Therefore, the tower heat absorber at night and the convection heat loss of the environment also influence the maintenance and energy consumption cost of the tower heat absorber.

Accordingly, the prior art is yet to be improved and developed.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a method for controlling a tower-type heat absorber with an air curtain screen, aiming at solving the problem of large heat absorber convection heat loss in the prior art.

The technical scheme adopted by the invention for solving the technical problem is as follows:

a control method for a tower type heat absorber with an air curtain screen comprises the following steps:

a heat sink;

the upper air curtain structure is arranged at the upper part of the heat absorption device and discharges air downwards;

the lower air curtain structure is arranged at the lower part of the heat absorption device and exhausts air upwards;

the air outlet of the upper air curtain structure and the air outlet of the lower air curtain structure form an air curtain screen;

the control method comprises the following steps:

acquiring wind flow information of the environment where the heat absorption device is located;

and starting the upper air curtain structure and the lower air curtain structure according to the air flow information to form an air curtain screen.

The control method of the tower type heat absorber with the air curtain screen comprises the following steps:

the upper air curtain components are arranged around the heat absorber; the windward curtain assembly comprises:

the upper truss structure is arranged on the heat absorption device;

the upper air curtain machine is arranged on the upper truss structure;

the air outlet of the upper air curtain machine inclines towards one side far away from the heat absorption device;

the lower air curtain structure comprises:

the lower air curtain components are arranged around the heat absorber; the lower curtain assembly comprises:

the lower truss structure is arranged on the heat absorption device;

the lower air curtain machine is arranged on the lower truss structure;

and the air outlet of the lower air curtain machine inclines towards one side far away from the heat absorption device.

The method for controlling the tower-type heat absorber with the air curtain screen, wherein the air flow information includes wind direction information, and the starting of the upper air curtain structure and the lower air curtain structure to form the air curtain screen according to the air flow information, includes:

and starting the upper air curtain machine and the lower air curtain machine corresponding to the wind direction information according to the wind direction information to form an air curtain screen.

The method for controlling the tower-type heat absorber with the air curtain screen, wherein the air flow information includes air speed information, and the starting of the upper air curtain structure and the lower air curtain structure to form the air curtain screen according to the air flow information, includes:

determining the wind speed of the upper wind curtain machine and the wind speed of the lower wind curtain machine according to the wind speed information;

and starting the upper air curtain machine and the lower air curtain machine to form an air curtain screen according to the air speed of the upper air curtain machine and the air speed of the lower air curtain machine.

The control method of the tower type heat absorber with the air curtain screen is characterized in that the upper air curtain machine is rotationally connected with the upper truss structure and rotates towards the direction far away from the heat absorbing device;

the lower air curtain machine is rotationally connected with the lower truss structure and rotates towards the direction far away from the heat absorption device;

the control method further comprises the following steps:

and continuously acquiring the air flow information of the environment where the heat absorption device is located, and adjusting the inclination angle and the air speed of the upper air curtain machine and the inclination angle and the air speed of the lower air curtain machine according to the air flow information until the tower type heat absorber with the air curtain screen is closed.

The control method of the tower type heat absorber with the air curtain screen is characterized in that the upper air curtain component further comprises the following steps:

the upper light baffle plate is arranged on the upper truss structure and is positioned on one side of the upper air curtain machine, which is far away from the heat absorption device;

the lower air curtain assembly further comprises:

the lower light baffle plate is arranged on the lower truss structure and is positioned on one side of the lower air curtain machine, which is far away from the heat absorption device;

wherein the lower light baffle extends to below the heat sink.

The control method of the tower type heat absorber with the air curtain screen comprises the following steps that heat insulation material layers are arranged on the upper truss structure, the upper air curtain machine, the upper light baffle plate, the lower truss structure, the lower air curtain machine and the lower light baffle plate; and/or

The upper truss structure, the upper light baffle plate, the lower truss structure and the lower light baffle plate are all made of stainless steel components.

The control method of the tower type heat absorber with the air curtain screen comprises the following steps:

a first upper truss and a second upper truss; the first end of the first upper truss and the first end of the second upper truss are both arranged on the heat sink, and the distance between the first end of the first upper truss and the first end of the second upper truss is smaller than the distance between the second end of the first upper truss and the second end of the second upper truss; and/or

The lower truss structure includes:

a first lower truss and a second lower truss; the first end of the first lower truss and the first end of the second lower truss are both arranged on the heat sink, and the distance between the first end of the first lower truss and the first end of the second lower truss is smaller than the distance between the second end of the first lower truss and the second end of the second lower truss.

The control method of the tower type heat absorber with the air curtain screen is characterized in that the upper air curtain component further comprises the following steps:

the upper heat shield is arranged on the upper truss structure and is positioned between the upper air curtain machine and the heat absorption device;

the lower air curtain assembly further comprises:

and the lower heat shield is arranged on the lower truss structure and is positioned between the lower air curtain machine and the heat absorbing device.

The control method of the tower type heat absorber with the air curtain screen comprises the following steps:

the upper header is connected with the upper truss structure;

the heat absorption pipe assembly is connected with the upper header;

and the lower header is connected with the lower truss structure.

Has the advantages that: because the air curtain screen is formed by controlling the starting of the upper air curtain structure and the lower air curtain structure, the air curtain screen blocks external high-flow-rate air from transversely sweeping the surface of the heat absorber, a low-convection environment or a windless environment can be formed on the surface of the heat absorber, the convection heat transfer is greatly reduced, and the convection heat loss of the heat absorber is greatly reduced.

Drawings

Fig. 1 is a schematic structural view of a tower heat absorber with an air curtain shield according to the present invention.

Fig. 2 is a top view of a tower heat absorber with air curtain shield according to the present invention.

Fig. 3 is a three-dimensional schematic view of the upper and lower air curtain structures of the present invention.

Fig. 4 is a schematic view of the upper and lower heat shields of a tower heat absorber with air curtain shield according to the present invention.

Fig. 5 is a flow chart of a method of controlling a tower heat absorber with an air curtain shield according to the present invention.

Description of reference numerals:

20. a heat sink; 30. an upper air curtain structure; 40. a lower air curtain structure; 1. an upper header; 2. a lower header; 3. a heat sink tube assembly; 4. an upper truss structure; 5. a lower truss structure; 6. an upper air curtain machine; 7. a lower air curtain machine; 8. an upper light-shielding plate; 9. a lower light-shielding plate; 10. an upper heat shield plate; 11. a lower heat shield.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring also to fig. 1-4, the present invention provides embodiments of a tower heat absorber with an air curtain shield.

In the prior art, a heat absorber is usually arranged in the high air, the air flow speed in the high air is high, and when high-flow-speed air transversely sweeps the surface of the heat absorber, the air and the heat absorber form convective heat exchange, so that the convective heat loss of the heat absorber is high. Therefore, the upper air curtain structure and the lower air curtain structure are arranged to form the air curtain screen on the surface of the heat absorber, and the high-flow-velocity air which transversely grazes the surface of the heat absorber is resisted through the air curtain screen, so that the convection heat exchange between the high-flow-velocity air and the heat absorber is reduced, and the convection heat loss of the heat absorber is reduced.

As shown in fig. 1 and 3, the tower-type heat absorber with an air curtain screen of the present invention includes:

a heat sink 20;

an upper air curtain structure 30 disposed at an upper portion of the heat absorber 20 and discharging air downward;

a lower air curtain structure 40 disposed at a lower portion of the heat absorber 20 and discharging air upward;

the outlet air of the upper air curtain structure 30 and the outlet air of the lower air curtain structure 40 form an air curtain screen.

The heat absorber 20 is a device that absorbs solar energy and converts the solar energy into heat energy, the upper wind curtain structure 30 is a structure that is located on the upper portion of the heat absorber 20 and is used for forming a wind curtain screen, the lower wind curtain structure 40 is a structure that is located on the lower portion of the heat absorber 20 and is used for forming a wind curtain screen, the upper wind curtain structure 30 and the lower wind curtain structure 40 can blow air outwards, and the air discharged from the upper wind curtain structure 30 and the air discharged from the lower wind curtain structure 40 form the wind curtain screen. The air curtain screen is a barrier formed by air fluid, and the air curtain screen can be used for sunlight to pass through without influencing the heat absorption of the heat absorption device 20; the air curtain screen blocks external high-flow-speed air from transversely sweeping the surface of the heat absorber 20, so that a low-convection environment or a windless environment can be formed on the surface of the heat absorber 20, the convection heat transfer is greatly reduced, and the convection heat loss of the heat absorber 20 is greatly reduced.

In a preferred implementation manner of the embodiment of the present invention, the heat sink 20 of the present invention is an external tower heat sink 20, and the heat sink 20 is entirely exposed to the air, so that the light focused circumferentially can be received at 360 ° circumferentially. The upper and lower curtain structures 30 and 40 are disposed around the periphery of the heat sink 20 to form a circular curtain that resists convective heat transfer from the high velocity air to the heat sink 20 in a 360 ° direction.

In a preferred implementation of the embodiment of the present invention, as shown in fig. 1-2, the upper air curtain structure 30 includes:

a plurality of upper air curtain assemblies disposed around the periphery of the heat sink 20; the windward curtain assembly comprises:

an upper truss structure 4 provided to the heat absorber 20;

an upper air curtain machine 6 arranged on the upper truss structure 4;

wherein, the air outlet of the upper air curtain machine 6 inclines to one side far away from the heat absorption device 20;

the lower curtain structure 40 includes:

a plurality of lower air curtain assemblies disposed around the periphery of the heat sink 20; the lower curtain assembly comprises:

a lower truss structure 5 provided to the heat absorber 20;

a lower air curtain machine 7 arranged on the lower truss structure 5;

wherein, the air outlet of the lower air curtain machine 7 inclines to the side far away from the heat absorption device 20.

Specifically, the windward curtain structure 30 includes a plurality of windward curtain components, the plurality of windward curtain components are uniformly arranged around the heat sink 20, and the lower windward curtain structure 40 includes: a plurality of lower air curtain assemblies evenly disposed around the heat sink 20. The quantity of windward curtain subassembly is the same with the quantity of wind curtain subassembly down, and the quantity of windward curtain subassembly and the quantity of wind curtain subassembly down set up as required, and as shown in the figure, the windward curtain subassembly has 8, and the wind curtain subassembly has 8 down. The upper air curtain component and the lower air curtain component are correspondingly arranged. The modular upper air curtain component and the modular lower air curtain component are adopted, so that each upper air curtain component and each lower air curtain component can be controlled conveniently, for example, the wind direction is unchanged within a certain period of time, and the corresponding upper air curtain component and the corresponding lower air curtain component can be controlled to be opened only to form the circular arc-shaped air curtain screen, so that the electric quantity is saved.

The air outlets of the upper and lower air curtain machines 7 are inclined towards one side far away from the heat absorbing device 20, that is, the air outlet directions of the upper and lower air curtain machines 7 are towards the direction far away from the heat absorbing device 20, and the air outlet of the upper and lower air curtain machines 7 is converged and then blown away in the direction far away from the heat absorbing device 20, so that the air outlet of the upper and lower air curtain machines can not be blown to the heat absorbing device 20, and can form blocking and impact on external high-flow-rate air, change the direction of the external high-flow-rate air and reduce the impact force of the external high-flow-rate air.

The windward curtain assembly includes: go up truss structure 4 and last air curtain machine 6, go up air curtain machine 6 and fix at heat sink 20 through last truss structure 4, the air curtain subassembly includes down: the lower air curtain machine 7 is fixed on the heat absorbing device 20 through the lower truss structure 5, and other structures can be adopted to fix the upper air curtain machine 7 and the lower air curtain machine 7 on the heat absorbing device 20. When the upper and lower air curtains 7 are started, the air curtains on the upper and lower truss structures 5 spray high-speed jet flows to the outside of the heat absorber 20, so as to form a stable air curtain outside the heat absorber 20. The air curtain screen can not only effectively block the external wind from transversely sweeping the heat absorber 20, but also create a low convection environment with low wind speed around the heat absorber 20, so that the air curtain screen can effectively reduce the heat dissipation of the heat absorber 20 to the external convection. Meanwhile, the air curtain machine can adjust the jet flow angle according to the actual external wind speed and wind direction condition to obtain the optimal effect of blocking the external wind, thereby reducing the convection heat loss on the surface of the heat absorption device 20 to the maximum extent. At night, the air curtain screen can also play a role in heat preservation, and the maintenance and energy consumption cost of the heat absorber 20 at night is further reduced.

Each upper air curtain 6 is of an axisymmetrical structure, and each lower air curtain 7 is of an axisymmetrical structure, where the axis refers to the central axis of the heat absorber 20.

In a preferred implementation of the embodiment of the present invention, as shown in fig. 1, 3 and 4, the heat sink 20 includes:

an upper header 1 connected to the upper truss structure 4;

the heat absorption pipe assembly 3 is connected with the upper header 1;

and the lower header 2 is connected with the lower truss structure 5.

Specifically, the heat absorbing device 20 is used as a core component of the tower-type heat collecting system, and mainly receives and absorbs incident condensing light through the heat absorbing pipe assembly 3, and the upper part and the lower part of the heat absorbing pipe assembly 3 are respectively an upper header 1 and a lower header 2 coated with fireproof and heat-insulating materials. The heat absorption pipe assembly 3 comprises a plurality of heat absorption pipes which are sequentially arranged to form a cylinder shape, and two ends of each heat absorption pipe are respectively connected with the upper header 2 and the lower header 2.

In a preferred implementation manner of the embodiment of the present invention, as shown in fig. 1 to 4, the upper air curtain assembly further includes:

the upper light baffle plate 8 is arranged on the upper truss structure 4 and is positioned on one side, away from the heat absorption device 20, of the upper air curtain machine 6;

the lower air curtain assembly further comprises:

the lower light baffle plate 9 is arranged on the lower truss structure 5 and is positioned on one side, away from the heat absorption device 20, of the lower air curtain machine 7;

wherein the lower light shield 9 extends below the heat sink 20.

Specifically, in order to prevent the condensed light reflected by the condenser from being projected onto the upper and lower air curtains 7 and burning out or destroying the normal operation of the upper and lower air curtains 7, the upper and lower light barriers 9 are respectively disposed on the upper and lower truss structures 5, and the upper and lower air curtains 7 are respectively shielded by the upper and lower light barriers 9. Of course, the upper and lower light-shielding plates 9 can also shield other impurities in the air which may damage the upper and lower air-curtain machines 7.

In order to more fully shield the spotlight projected onto the surface of the lower air curtain 7, the length of the lower light shield 9 in the axial direction of the heat absorber 20 should be greater than that of the upper light shield 8, and in particular, the lower light shield 9 extends below the heat absorber 20. Of course, the length of the lower light-blocking plate 9 is determined according to the condensed light formed by the condenser lenses. Specifically, since the condensed light is projected upward from the lower ground onto the heat absorber 20, the upper light-shielding plate 8 only needs to be installed below the upper truss structure 4 to sufficiently protect the upper air curtain 6. Different from the upper light baffle plate 8, the lower light baffle plate 9 is required to be installed above and below the lower truss structure 5 so as to more comprehensively shield the light gathering rays projected to the surface of the lower air curtain machine 7, namely, the length of the lower light baffle plate 9 in the axial direction of the heat absorption device 20 is larger than that of the upper light baffle plate 8.

The upper and lower light blocking plates 9 are respectively connected to the peripheral edges of the upper and lower truss structures 5 through welding or bolts, and the irradiation of incident condensing light to the air curtain machine and the air curtain machine can be fully blocked due to the vertical arrangement of the upper and lower light blocking plates 9. The upper and lower truss structures 5 can also be respectively provided with an upper reinforcing rib and a lower reinforcing rib, the fixing effect of the upper and lower light-shielding plates 9 is respectively enhanced through the upper and lower reinforcing ribs, and the upper and lower light-shielding plates 9 are prevented from shaking and falling off.

In a preferred implementation manner of the embodiment of the present invention, the upper truss structure 4, the upper air curtain machine 6, the upper light baffle 8, the lower truss structure 5, the lower air curtain machine 7, and the lower light baffle 9 are all provided with a thermal insulation material layer.

Specifically, in order to further prevent the condensed light from damaging each component, the heat insulation material layers are arranged on the upper truss structure 5, the lower truss structure 5, the upper air curtain machine 7, the lower air curtain machine 7, the upper light baffle plate 9 and the lower light baffle plate 9, and the like, so that heat insulation is performed through the heat insulation material layers, and damage caused by overhigh temperature of each component due to irradiation of the condensed light is prevented. The heat insulating material layer can be made of white heat insulating materials.

In a preferred implementation manner of the embodiment of the present invention, the upper truss structure 4, the upper light baffle plate 8, the lower truss structure 5, and the lower light baffle plate 9 are all made of stainless steel members.

Specifically, in order to ensure the strength and rust prevention performance of the upper and lower truss structures 5, the upper and lower light blocking plates 9, the upper and lower truss structures 5, and the upper and lower light blocking plates 9 are made of stainless steel members.

In a preferred implementation of the embodiment of the present invention, as shown in fig. 2, the upper truss structure 4 includes:

a first upper truss and a second upper truss; the first end of the first upper truss and the first end of the second upper truss are both disposed on the heat sink 20, and a distance between the first end of the first upper truss and the first end of the second upper truss is smaller than a distance between the second end of the first upper truss and the second end of the second upper truss.

The lower truss structure 5 includes:

a first lower truss and a second lower truss; the first end of the first lower truss and the first end of the second lower truss are both disposed on the heat sink 20, and a distance between the first end of the first lower truss and the first end of the second lower truss is smaller than a distance between the second end of the first lower truss and the second end of the second lower truss.

Specifically, the first upper truss and the second upper truss are expanded outwards to form a splayed shape, so that the first upper truss and the second upper truss are uniformly distributed in an annular area outside the heat absorber 20, the upper air curtains 6 and the upper light baffles 8 can be surrounded to form a circle, and the fixing effect of the upper air curtains 6 and the upper light baffles 8 on the upper truss structure 4 is better.

In a preferred implementation manner of the embodiment of the present invention, as shown in fig. 4, the upper air curtain assembly further includes:

an upper heat shield 10 disposed on the upper truss structure 4 and located between the upper air curtain machine 6 and the heat absorber 20;

the lower air curtain assembly further comprises:

and the lower heat shield plate 11 is arranged on the lower truss structure 5 and is positioned between the lower air curtain machine 7 and the heat absorption device 20.

Specifically, in order to further prevent the heat absorbing pipe assembly 3 with high temperature in the heat absorber 20 from affecting the operation of the upper and lower air curtains 7 by the external high radiation heat, an upper heat shield 10 is disposed between the upper air curtain 6 and the heat absorber 20, and a lower heat shield 11 is disposed between the lower air curtain 7 and the heat absorber 20. Of course, the lengths of the upper heat shield 10 and the lower heat shield 11 are not too long so as to prevent the condensed light projected onto the surface of the heat absorbing pipe assembly 3 from being blocked.

In a preferred implementation manner of the embodiment of the present invention, the upper air curtain machine 6 is rotatably connected to the upper truss structure 4, and the upper air curtain machine 6 rotates in a direction away from the heat sink 20;

the lower air curtain machine 7 is rotatably connected with the lower truss structure 5, and the lower air curtain machine 7 rotates towards the direction far away from the heat absorption device 20.

Specifically, the upper air curtain machine 6 is rotatably connected with the upper truss structure 4, the upper air curtain machine 6 rotates towards the direction far away from the heat absorbing device 20, so that the air outlet direction of the upper air curtain machine 6 can be adjusted, the lower air curtain machine 7 is rotatably connected with the lower truss structure 5, and the lower air curtain machine 7 rotates towards the direction far away from the heat absorbing device 20, so that the air outlet direction of the lower air curtain machine 7 can be adjusted. By adjusting the air outlet direction of the upper and lower air curtain machines 7, air curtain screens with different shapes can be formed. Because the direction of outside high velocity of flow air is not fixed unchangeable, including the level blow, the level blows upwards and the level blows downwards, according to the air-out direction of outside wind current's direction adjustment upper and lower air curtain 7, thereby can better separation outside wind current effectively reduce heat sink 20 convection heat loss.

The upper air curtain machine 6 and the upper truss structure 4 can be connected in a hinged mode and the like. Of course, an upper drive member may be provided to drive the upper air curtain 6 to rotate relative to the upper truss structure 4; a lower drive member is provided to drive the lower air curtain 7 to rotate relative to the lower truss structure 5.

In a preferred implementation of the embodiment of the present invention, as shown in fig. 1 and 4, the lower curtain assembly is installed slightly near the lower edge of the lower header 2 to prevent the lower light blocking plate 9 from blocking the condensed light projected to the heat absorbing pipe assembly 3.

Detailed description of the preferred embodiment

The height of the heat absorption pipe assembly of the heat absorber is 6.2m, and the diameter of the heat absorber is 5.1 m. The outlet jet velocity of the upper and lower air curtain is 12m/s, the jet angle of the upper air curtain is 10 degrees out of the lower part, correspondingly, the jet angle of the lower air curtain is 10 degrees out of the upper part. The radial distances between the outlets of the upper air curtain machine and the lower air curtain machine and the heat absorption pipe assembly are both 30 cm. The temperature of the outer surface of the heat absorption pipe assembly is 600 ℃, the ambient temperature is 27 ℃, and the external wind speed of the heat absorption device is 10 m/s. When wind flows across the heat absorber, the heat absorber can be calculated according to the heat transfer theory, and the value of the convective heat transfer coefficient between the heat absorber and the air is 29.63W/(m)²K). By means of beltsThe heat absorption device with the air curtain screen effectively reduces the convective heat transfer coefficient to 4.59W/(m)²K), which means that the air curtain can effectively reduce the convective heat loss of the heat sink by about 84.5%, is one of the most effective methods for reducing convective heat loss.

Based on any one of the tower type heat absorber with the air curtain screen, the invention also provides a better embodiment of a control method of the tower type heat absorber with the air curtain screen, which comprises the following steps:

as shown in fig. 5, a method for controlling a tower-type heat absorber with an air curtain screen according to an embodiment of the present invention includes the following steps:

and S100, acquiring wind flow information of the environment where the heat absorption device is located.

Specifically, the wind flow information of the environment in which the heat absorber is located refers to wind flow information outside the heat absorber, and the wind flow information refers to information reflecting properties such as the direction and speed of wind. The air flow information may be obtained by an air flow sensor, and specifically, a plurality of air flow sensors may be disposed on the upper air curtain structure and the lower air curtain structure to obtain the air flow information. Of course, the wind flow sensor can be arranged at other places, such as outside the tower type light-gathering and heat-collecting system, so as to obtain the wind flow information. The wind flow information may also include the type of wind, such as gusts, cyclones, burns, typhoons, tornadoes, and the like. And determining whether the upper air curtain structure and the lower air curtain structure are to be started to form the air curtain screen according to the air flow information.

And S200, starting the upper air curtain structure and the lower air curtain structure according to the air flow information to form an air curtain screen.

Specifically, according to the air flow information, the upper air curtain structure and the lower air curtain structure are started to form the air curtain screen, that is, when the air flow information satisfies a preset condition, the upper air curtain structure and the lower air curtain structure are started to form the air curtain screen. The preset conditions refer to starting conditions of the tower type heat absorber with the air curtain screen, and can be set as required.

Specifically, the wind flow information includes wind direction information, and step S200 specifically includes:

and step S210, starting the upper air curtain machine and the lower air curtain machine corresponding to the wind direction information to form an air curtain screen according to the wind direction information.

Specifically, since there are a plurality of upper and lower air curtains, when the direction of the air flow is stable, the air flow can be blocked only by starting the upper and lower air curtains on the windward side without starting all the upper and lower air curtains. The direction of the wind flow is unstable and changes at any time, all the upper wind curtain machines and the lower wind curtain machines need to be started, and the shunting is blocked from 360 degrees.

Specifically, the wind flow information includes wind speed information, and the step S200 specifically includes: .

And S220, determining the wind speed of the upper wind curtain machine and the wind speed of the lower wind curtain machine according to the wind speed information.

And step S230, starting the upper air curtain machine and the lower air curtain machine to form an air curtain screen according to the wind speed of the upper air curtain machine and the wind speed of the lower air curtain machine.

Specifically, when the speed of the wind flow (i.e., the wind speed information) is small, the wind flow does not cause the convective heat loss of the heat sink, and the upper and lower air curtain machines do not need to be started. When the speed of the wind flow (i.e. the wind speed information) is large, the wind flow will cause the heat loss of the heat absorber, and the upper and lower air curtain machines need to be started. Moreover, the wind speeds of the upper and lower wind curtain machines can be determined according to the size of the wind flow information, and the larger the wind flow information is, the larger the wind speeds of the upper and lower wind curtain machines are, so as to ensure that the heat absorption device is not influenced by the wind flow; the smaller the wind flow information is, the smaller the wind speed of the upper and lower wind curtain machines is, so as to save electric energy.

And step S300, continuing to acquire the air flow information of the environment where the heat absorption device is located, and adjusting the inclination angle and the air speed of the upper air curtain machine and the inclination angle and the air speed of the lower air curtain machine according to the air flow information until the tower type heat absorber with the air curtain screen is closed.

Specifically, since the wind flow information may change at any time, the upper and lower wind curtains can be adjusted according to the wind flow information, and specifically, the inclination angles and the wind speeds of the upper and lower wind curtains can be adjusted. Of course, if the wind speed of the upper and lower wind curtains is 0, it means that the upper and lower wind curtains are in the closed state; if the wind speed of the upper and lower air curtains is not 0, it means that the upper and lower air curtains are in the on state.

Based on any one of the tower type heat absorber with the air curtain screen, the invention also provides a better embodiment of the tower type light-gathering and heat-collecting system, which comprises the following components in parts by weight:

the tower type light and heat collecting system comprises the tower type heat absorber with the air curtain screen.

The tower type light and heat collecting system further comprises: the collecting mirror is used for collecting the sunlight to the heat absorption device, and the collecting mirror is located below the heat absorption device.

The tower type light and heat collecting system further comprises: the tracking device is used for tracking the position of the sun, connected with the collecting lens and used for tracking the position of the sun and adjusting the orientation of the collecting lens according to the position information of the sun.

It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.