Magnetic adsorption cavity type solar particle heat absorber

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.

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...

AI Technical Summary

Problems solved by technology

Due to the simple structure of the free-falling type and the hindering-falling type, they have attracted widespread attention, but they are all based on gravity as the natural active force, and the solid particles fall too fast, resulting in short heat absorption time and unable to fully absorb solar energy; The uneven thickness of the heat layer leads to uneven heat absorption temperature distribution of solid heat storage particles and prone to hot spot problems; while solid heat storage particles directly fall and absorb heat, they are disturbed by the interna

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