A kind of composite solar heat absorber and method for double-sided heat collection

Abstract

A composite solar heat absorber with double-sided heat collection, comprising: a heat absorber body, an inner top heliostat, an outer heliostat, an inner bottom heliostat and an arc-shaped reflector; the arc-shaped reflector is fixed It is arranged above the heat absorber body; the inner top heliostat reflects the solar radiation to the arc reflector and then reflects to the top of the inner chamber of the heat absorber body; the inner bottom heliostat reflects the solar radiation to the heat absorber body The bottom of the inner chamber; the outer heliostat reflects the solar radiation to the outside of the heat absorber body, and the heat absorber body also includes a double cone, the double cone is a cone with two bottom surfaces connected, and the double cone The body is fixed in the middle of the heat sink chamber; the surface is uniformly coated with a reflective coating. A heat absorption method of a double-sided heat-collecting composite solar heat absorber, which simultaneously heats the inner and outer surfaces of the heat absorber through a heliostat, increases the heat absorption of the heat absorber under the same volume, and improves the energy flow density. The utilization rate of energy is increased and the 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 can convert solar energy into heat energy, which can 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 i...

AI Technical Summary

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) The heat-absorbing tube of the exposed and cavity-type solar heat absorbers and the shell of the heat absorber need to be filled with heat insulating materials and heat insulating materials to isolate the external heat exchange, which increases the production cost;

[0006] (3) There is a gap between the tube bundles of the traditional exposed solar heat absorber, resulting in the loss of solar radiation

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