CN209101582U - A cavity solar heat absorber device - Google Patents

Abstract

The utility model provides a kind of cavity-type solar heat absorber device, including shell, the hollow cavity of setting in the shell, there is the aperture being connected to cavity on shell, portion is equipped with multiple straight through heat collection tube in the cavity, multiple straight through heat collection tube are arranged successively setting along cavity inner wall profile, in straight through heat collection tube upper end, lower end is equipped with annular thermal-collecting tube, straight through heat collection tube both ends are connected to corresponding annular thermal-collecting tube respectively, wherein working medium inlet tube is connected with positioned at the annular thermal-collecting tube for leading directly to direct pipe upper end, annular thermal-collecting tube positioned at straight through heat collection tube lower end is connected with sender property outlet pipe.The utility model manufacturing process is more simple, is easy to produce in batches, while cavity inner surface can be completely covered, and can improve cavity inner wall solar radiation energy-flux density uniformity, and the heat loss for reducing cavity type heat absorber improves its photothermal conversion efficiency.

Description

A cavity solar heat absorber device

technical field

The utility model mainly relates to the technical field of solar thermal utilization, in particular to a cavity type solar heat absorber device.

Background technique

Solar concentrated photothermal power generation can not only effectively avoid the expensive silicon photoelectric conversion process and reduce the cost of solar power generation, but also can generate electricity continuously and stably. The concentrator in the solar thermal power generation system uses its own geometrical optical properties to gather the sunlight with low radiative heat flux density to form a high radiative heat flux density. The heat absorber is a device installed at the focus of the dish concentrator to collect solar energy. It is the core component of solar concentrating photothermal power generation. It is responsible for photothermal conversion. all play an important role. The cavity type heat absorber has good light-to-heat conversion performance, simple structure, high system efficiency, convenient installation, sensitive layout, and can be manufactured in a modularized manner, thereby being applied to the field of solar light-heat utilization.

Most of the traditional solar heat absorbers use inner-wound tube cavity heat absorbers, that is, the pipes containing the heated working medium are evenly wound on the inner wall of the cavity of the heat absorber, and the solar energy is collected by direct absorption, and the heat inside the heating pipe is heated. Working fluid, the heated working fluid pipeline of this structure is difficult to process, the cost is high, and it is not easy to carry out mass production. At the same time, the distribution of energy flow density in the traditional inner-wound tube type cavity heat absorber is not uniform, which leads to uneven wall temperature of the heated working medium pipe, which is prone to hot spots, which affects the stable operation of the cavity heat absorber. , damage the collector. The traditional inner wound tube cavity heat absorber cannot completely cover the inner surface of the cavity, resulting in low heat collection efficiency.

Utility model content

In order to solve the deficiencies of the current technology, the utility model provides a cavity solar heat absorber device based on the practical application in combination with the existing technology, which has the advantages of simple and reasonable structure, easy mass production, and modular manufacturing.

The technical scheme of the present utility model is as follows:

A cavity-type solar heat absorber device, comprising a shell, a hollow cavity is arranged in the shell, the shell is provided with a lighting opening which is communicated with the cavity, and a plurality of straight-through heat collecting tubes are arranged inside the cavity, and a plurality of The straight-through heat collecting tubes are arranged in sequence along the contour of the inner wall of the cavity, annular heat-collecting tubes are arranged at the upper and lower ends of the straight-through heat-collecting tubes, and the two ends of the straight-through heat collecting tubes are respectively connected with the corresponding annular heat collecting tubes. A working medium inlet pipe is connected, and the annular heat collecting pipe located at the lower end of the straight heat collecting pipe is connected with a working medium outlet pipe.

The outline of the inner wall of the cavity is circular, and a plurality of straight-through heat collecting tubes are evenly arranged in sequence along the circumferential direction of the inner wall. The annular heat-collecting tube has a circular structure. Connection of heat pipes.

The inside of the shell is filled with a rock wool thermal insulation layer.

The straight-through heat collecting tubes and the annular heat collecting tubes are both red copper tubes.

The inner wall of the cavity is uniformly coated with a reflective coating.

The beneficial effects of the present utility model:

The utility model relates to a solar heat collecting cavity type heat absorber device composed of a plurality of straight-through heat collecting tubes, the manufacturing process is simpler, the mass production is easy, and the inner surface of the cavity can be completely covered at the same time, and the solar radiation of the inner wall of the cavity can be improved. The uniformity of energy flow density reduces the heat loss of the cavity heat absorber and improves its light-to-heat conversion efficiency. This structure can better allow multiple reflections of light and improve the distribution of solar radiation energy flow on the inner wall of the cavity, thereby improving the heat absorption device. light-to-heat conversion efficiency.

Description of drawings

Accompanying drawing 1 is the overall structure schematic diagram of the utility model;

Accompanying drawing 2 is the internal structure schematic diagram of the utility model;

Figure 3 is a schematic diagram of the arrangement of the straight-through heat collecting tubes of the present invention.

Symbols shown in the attached drawings:

1. Shell; 2. Cavity; 3. Lighting port; 4. Working medium inlet pipe; 5. Working medium outlet pipe; 6. Annular heat collecting pipe; 7. Straight heat collecting pipe.

Detailed ways

The utility model will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the teaching content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the limited scope of the present application.

As shown in Figures 1 to 3, the present utility model is a solar collector cavity type heat absorber device composed of a plurality of straight-through heat collector tubes, including a casing 1, a lighting port 3, and a working medium inlet pipe 4 as shown in the figure. , working medium outlet pipe 5, several straight-through heat collecting pipes 7, rock wool insulation layer, two annular heat collecting pipes 8. The shell 1 is a cylindrical body structure, and a cavity 2 is arranged inside. The cavity 2 is a hollow structure to form a heat absorber cavity. The annular heat collecting tubes 6 are respectively arranged on the upper and lower ends of the straight-through heat collecting tubes 7, the upper ends of the straight-through heat collecting tubes 7 are inserted into the annular heat collecting tubes 6 on the upper part, and the lower ends of the straight-through heat collecting tubes 7 are inserted into the annular heat collecting tubes 6 in the lower part, and the working medium inlet pipe is 4. Pass through the shell 1 and the rock wool insulation layer inside it and connect to the annular heat collector tube 6 located on the upper part of the straight-through heat collection tube 7, and the working medium outlet pipe 6 passes through the shell 1 and the rock wool thermal insulation layer inside it and is connected to the through-pass collector tube 6. The annular heat collecting pipe 6 at the lower part of the heat pipe 7, and the rock wool insulation layer can reduce the heat collection loss.

The straight-through heat collecting tube 7 and the annular heat collecting tube 6 of the present invention are made of red copper tubes, which are convenient for heat transfer.

With the heat absorber of the utility model, when the sunlight with high radiant energy flow reflected by the concentrator enters the cavity 2 through the light opening 3 of the cavity heat absorber, it undergoes multiple refractions in the cavity of the heat absorber, After reflection, it is finally absorbed by the absorbing material on the surface of the collector tube, thereby heating the working fluid circulating in the pipeline. The solar collector cavity type heat absorber composed of several straight collector tubes 7 can completely cover the inner surface of the cavity, which can improve the cavity. The uniformity of the energy flow density of solar radiation on the inner wall reduces the heat loss of the cavity heat absorber and improves its light-to-heat conversion efficiency.

The utility model is a solar heat collecting cavity type heat absorber device composed of a plurality of straight-through heat collecting tubes, the straight-through heat collecting tubes are densely arranged, the light-concentrating area is increased, and the light-to-heat conversion efficiency of the heat absorber is also improved to a certain extent.

Claims (5)

1. A cavity-type solar heat absorber device, comprising a casing, a hollow cavity is arranged in the casing, and the casing is provided with a lighting opening communicated with the cavity, and it is characterized in that: inside the cavity, a plurality of The straight-through heat collecting tube, a plurality of straight-through heat-collecting tubes are arranged in sequence along the contour of the inner wall of the cavity, annular heat-collecting tubes are provided at the upper end and the lower end of the straight-through heat-collecting tube, and the two ends of the straight-through heat-collecting tube are respectively connected with the corresponding annular heat-collecting tube. The annular heat collecting pipe at the upper end of the pipe is connected with a working medium inlet pipe, and the annular heat collecting pipe located at the lower end of the straight heat collecting pipe is connected with a working medium outlet pipe. 2 . The cavity type solar heat absorber device according to claim 1 , wherein the inner wall of the cavity is circular in shape, a plurality of straight-through heat collecting tubes are uniformly arranged in sequence along the circumferential direction of the inner wall, and the annular heat collecting tubes are 2 . The ring-shaped structure, the upper and lower ends of a plurality of straight-through heat collecting tubes are inserted into the annular heat collecting tubes to achieve communication with the annular heat collecting tubes. 3 . The cavity type solar heat absorber device according to claim 1 , wherein the shell is filled with a rock wool thermal insulation layer. 4 . 4 . The cavity type solar heat absorber device according to claim 1 , wherein the straight-through heat collecting tubes and the annular heat collecting tubes are both red copper tubes. 5 . 5 . The cavity type solar heat absorber device according to claim 1 , wherein the inner wall of the cavity is uniformly coated with a reflective coating. 6 .