Energy storage device capable of combining photochemistry with thermochemistry

Abstract

An energy storage device capable of combining photochemistry with thermochemistry comprises a solar condenser, a light ray frequency divider, a photochemical reactor and a thermochemical reactor, wherein the solar condenser is used for concentrating sunlight; the light ray frequency divider divides the light concentrated by the solar condenser into two beams; photons which are separated by the light ray frequency divider and participate in a photochemical reaction are guidedinto the photochemical reactor to enable photochemical reactants in the photochemical reactor to be isomerized, and energy is stored in chemical bonds; and photons which are separated by the light ray frequency divider and do not participate in the photochemical reaction are guidedinto the thermochemical reactor to enable thermochemical reactants in the thermochemical reactor to be subjected to a thermochemical reaction, and energy is stored in chemical energy. The energy storage device capable of combining photochemistry with thermochemistry respectively utilizes the photons, with different frequencies, of solar energy, high-energy photons undergo the photochemical reaction, the optical energy is directly stored in the chemical bonds, low-energy photons enter the thermochemical reactor and are firstly converted into thermal energy and then converted into chemical energy to be stored, and full spectrum efficient energy storage is realized.

Description

technical field [0001] The invention belongs to the field of solar energy storage, and in particular relates to an energy storage device combining photochemistry and thermochemistry. Background technique [0002] The development of both photovoltaic and photothermal technologies is limited by the instability of solar energy, so it is of great significance to develop efficient and long-term storage solar thermal storage technologies. Common energy storage methods include sensible heat, latent heat, and chemical energy storage. Different from sensible heat and latent heat energy storage, chemical energy storage can not only realize the conversion and storage of light energy, but also has the potential of high density, convenient transportation and controllable use. [0003] Solar thermochemical energy storage is to convert solar energy into thermal energy, provide heat of reaction for endothermic reactions, and under the action of catalysts, reactants are cracked or reformed ...

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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