Photochemical and thermochemical energy storage devices

Abstract

An energy storage device combining photochemistry and thermochemistry, comprising: a solar concentrator for concentrating sunlight; a light frequency divider for dividing the light collected by the solar concentrator into two beams; a photochemical reactor for separating the light from the light frequency divider The photons that participate in the photochemical reaction are introduced into the photochemical reactor, so that the photochemical reactants in it undergo an isomerization reaction, and the energy is stored in the chemical bond; as well as the thermochemical reactor, the photons that are not involved in the photochemical reaction separated by the light frequency divider are introduced into Thermochemical reactors allow thermochemical reactants to undergo thermochemical reactions and store energy in chemical energy. The energy storage device combining photochemistry and thermochemistry of the present invention uses photons of different frequencies of solar energy separately, wherein high-energy photons undergo a photochemical reaction to directly store light energy in chemical bonds, and low-energy photons enter the thermochemical reactor. It is converted into thermal energy first, and then converted into chemical energy for storage, realizing full-spectrum efficient energy storage.

Description

Technical field[0001]The present invention belongs to the field of solar energy storage, and more particularly to an energy storage device for photochemical and thermochemical binding.Background technique[0002]Whether it is photovoltaic or optical thermal technology, it is limited to solar instability, the development is efficient, and the solar heat storage technology with long storage time is of great significance. Common energy storage modes have dominated, latent heat and chemical energy storage. Unlike the thermal and latent heat storage, chemical energy storage can not only achieve light energy conversion and storage, but also more density, convenient transportation and controlled use potential.[0003]Solar thermochemical energy storage is converted to heat energy, providing heat-inspiration reaction. Under the action of the catalyst, the reactant is cleaved or reforming to form syngas, thereby storing solar energy in the chemical energy of syngas. .[0004]There are two aspects ...

AI Technical Summary

Problems solved by technology

[0004] There are two problems in solar thermochemical energy storage: (1) storing solar energy in the form of chemical energy has undergone two energy conversions. The solar light energy is first converted into thermal energy, and then thermal energy is converted into chemical energy, which increases the energy conversion. and irreversible loss in the storage process; (2) The storage of solar photons of different energies "equally" does not meet the principle of "grade matching and cascade utilization" in the process of energy utilization

[0007] However, solar molecular heterogeneous heat storage can only use a part of photons with high energy, and cannot use photons with low energy, which leads to low utilization rate of solar quantum and hinders the development of solar photochemical energy storage.

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