Magnetic adsorption cavity type solar particle heat absorber

A magnetic adsorption, solar energy technology, applied in the field of cavity solar particle heat absorbers, can solve the problems of uncontrollable particle flow trajectory, easy occurrence of hot spots, short heat absorption time, etc., to improve light-to-heat conversion efficiency and safe and reliable operation. The effect of improving the light-heat conversion efficiency and improving the thickness uniformity

CN114811978APending Publication Date: 2022-07-29HUNAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2022-07-29

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Abstract

The invention discloses a magnetic adsorption cavity type solar particle heat absorber which comprises magnetic solid particles, a cavity frame, three particle conveying devices, a heat preservation cover and the like. Openings are formed in the four sides of the cavity frame. The particle conveying device comprises a conveyor, a particle distributor, a flow control valve, a particle thickness controller, a magnetic force generating device, a particle collector and the like. The magnetic force generating device is continuously arranged in parallel along the lower sides of the horizontal section and the vertical section of the conveying belt, and the particle collector is arranged at the tail end of the magnetic force generating device; one opening of the cavity frame allows sunlight to enter, the other three openings are respectively and completely blocked by vertical sections of conveying belts in the three particle conveying devices, and the conveying belts convey solid particles to the opening to absorb high-density sunlight energy. Magnetic solid particles are adsorbed to the conveying belt through a magnetic field of the magnetic force generating device, the conveying speed of the magnetic solid particles is flexibly controlled through the conveying belt, solar energy on the left side, the right side and the rear side in the cavity is absorbed, and the light-heat efficiency and the service reliability of the magnetic solid particles are effectively improved.
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Description

technical field

[0001] The invention belongs to the field of solar concentrating thermal power generation, and relates to a solar thermal high-temperature heat absorber, in particular to a cavity-type solar particle heat absorber for magnetic adsorption. Background technique

[0002] Solar energy is a clean, environmentally friendly and widely distributed renewable energy. Tower solar high-temperature thermal power generation is a gradually improved solar power generation technology. Heat absorber is the core equipment of tower solar thermal power station. Its light-to-heat conversion performance is directly It affects the operating efficiency and economy of the entire solar power plant. In order to improve the utilization temperature of the back end, when solid particles are used as the heat transfer / storage medium, the temperature can reach about 1000°C, which can greatly improve the thermoelectric efficiency of the back end of the solar thermal power plant, and can make f...

Examples

Example Embodiment

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] like Figure 1-Figure 3As shown, the present invention includes solid particles 15 that are resistant to high temperature and can be magnetically attracted by magnetic force, a cavity frame 2 that is a rectangular cavity with openings on four sides except the upper and lower sides, and three sets of particle transporters. Transportation device 4, a thermal insulation cover 1 with a cavity and an opening on one side for heat insulation; the particle transportation device 4 includes a belt conveyor 8 with a magnetic field penetrable and high temperature-resistant conveyor belt 801 , the conveyor belt 801 in the conveyor 8 at least includes a horizontal section and a vertical section, a particle distributor 5 that holds the solid particles 15 and evenly distributes the particles to the horizontal section of the conveyor belt 801, and controls the lower end of the p...