Double-sided heat collection type composite solar heat absorber and method

Abstract

The invention discloses a double-sided heat collection type composite solar heat absorber. The solar heat absorber comprises a heat absorber body, inner side top heliostats, outer side heliostats, inner side bottom heliostats and an arc-shaped reflector; the arc-shaped reflector is fixedly arranged above the heat absorber body; the inner side top heliostats reflect solar radiation to the arc-shaped reflector, and then the solar radiation is reflected to the top of an inner side cavity of the heat absorber body; the inner side bottom heliostats reflect solar radiation to the bottom of the innerside cavity of the heat absorber body; and the outer side heliostats reflect solar radiation to the outer side of the heat absorber body, the heat absorber body further comprises a bipyramid, the bipyramid is formed by connecting two pyramids in a bottom to bottom manner, and the bipyramid is fixed in the middle of a cavity of the heat absorber; and the surface is uniformly coated with a reflecting coating. According to a heat absorption method of the double-sided heat collection type composite solar heat absorber, the inner surface and the outer surface of the heat absorber are heated simultaneously through the heliostats, the heat absorption amount of the heat absorber under the same volume is increased, the energy flow density is improved, the energy utilization rate is increased, andthe heat absorption effect is enhanced.

Description

technical field [0001] The invention relates to the field of solar heat absorbers, in particular to a double-sided heat-collecting composite solar heat absorber and a method thereof. Background technique [0002] Solar energy is a high-quality renewable energy source that is clean and pollution-free. Solar thermal technology converts solar energy into heat, which can then be used directly for heating or further converted into electricity. The solar thermal absorber is the core component of solar thermal technology, it directly converts the solar energy captured, reflected and concentrated by the heliostat into high-temperature heat energy that can be efficiently used, and provides the required heat source or power source for the generator set, so as to realize The process of solar thermal power generation can be traditionally divided into two types: exposed type and cavity type. The exposed solar heat absorber heats the working fluid by absorbing the solar radiation irradi...

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Problems solved by technology

[0004] (1) The solar radiation only heats the inner or outer side of the heat absorber on one side, the heating efficiency is low, and the working medium is heated unevenly;

[0005] (2) Heat-insulating materials and heat-insulating materials need to be filled between the heat-absorbing tubes of the exposed and cavity-type solar heat absorbers and the shell of the heat absorber to isolate external heat exchange, which increases production costs;

[0006] (3) There are gaps between the tube bundles of traditional exposed solar heat absorbers, resulting in the loss of solar radiation

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