Solid sphere flux heat absorber for solar thermal power generation

Abstract

The invention relates to a solid sphere flux heat absorber for solar thermal power generation, comprising a solid sphere heating absorbing device (1), a heat absorbing solid sphere (2) arranged in the solid sphere heating absorbing device (1), a lower-temperature sphere storage tank (5) arranged on the upper part of the solid sphere heating absorbing device (1), a high-temperature sphere storage tank (9) arranged on the lower part of the solid sphere heating absorbing device (1), lower-temperature sphere storage tank inlet valves (7) and (8) respectively arranged on the upper part and the lower part of the lower-temperature sphere storage tank (5), and high-temperature sphere storage tank inlet valves (11) and (12) respectively arranged on the upper part and the lower part of the high-temperature sphere storage tank (9). The solid sphere heating absorbing device (1) faces an energy flux of a radiation receiving window (4) at the throwing side of radiation energy flux (3). The lower-temperature sphere storage tank (5) is used for storing a lower-temperature solid sphere (6), and the high-temperature sphere storage tank (9) is used for storing a high-temperature solid sphere (10). The surface of the heat absorbing solid sphere (2) is black or is coated with solar selective absorption coatings.

Description

technical field [0001] The invention relates to a heat absorber for solar thermal power generation, in particular to a solid ball flow heat absorber using flowing solid balls as a heat absorber. Background technique [0002] The basic principle of solar tower thermal power generation device is to use many heliostats to reflect solar radiation to the solar receiver placed on the tower, and generate superheated steam or high temperature air with the help of heating medium, drive the generator set, and generate electricity. The high temperature solar heat absorber is the core component of the tower thermal power generation system. Many studies have been carried out on this technology abroad, mainly in the United States, Spain, Germany, Israel, Australia, South Korea and so on. Among them, the most widely used is the heat absorber that uses fluid media such as gas or liquid for photothermal conversion. Generally, the surface of a solid material is used to absorb solar radiatio...

AI Technical Summary

Problems solved by technology

[0005] (1) Solve the problem of low permissible energy flow density of traditional tubular heat absorbers; (2) Solve the high-temperature performance of volumetric heat absorber materials and the high-temperature sealing of heat-absorbing structures

(3) To overcome the problems of heat-absorbing surface ablation and thermal stress damage caused by uneven heat flux density; (4) To solve the problem of thermal shock caused by drastic changes in incident radiation energy flow, and to eliminate the problem of unstable operating conditions when suddenly cloud cover Phenomenon

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