Indirect intermediate-temperature chemical energy storage device for solar heat on basis of chemical-looping combustion

Abstract

The invention discloses an indirect intermediate-temperature chemical energy storage device for solar heat on the basis of chemical-looping combustion. The indirect intermediate-temperature chemical energy storage device comprises parabolic trough condensers, line-focus reinforced heat collecting tubes, a shell and tube heat collecting reactor, a heat collecting fluid regulating valve, a heat collecting fluid standby storage tank, a gas-solid oxidation reactor, a gas distributing board, a gas-solid heat exchange device, a gas-solid separating device and a pressure pump. The line-focus reinforced heat collecting tubes and the shell and tube heat collecting reactor are connected with the pressure pump, the shell and tube heat collecting reactor and a return valve are connected with the gas-solid oxidation reactor, and the gas-solid oxidation reactor, the gas-solid separating device and the gas-solid heat exchange device are connected with the shell and tube heat collecting reactor. When solar energy is unavailable or the irradiation intensity of the solar energy is insufficient, the line-focus reinforced heat collecting tubes, the heat collecting fluid regulating valve, the heat collecting fluid standby storage tank and the shell and tube heat collecting reactor are connected with the pressure pump. The collected solar heat is stored in a metallic solid fuel form by the indirect intermediate-temperature chemical energy storage device, and the indirect intermediate-temperature chemical energy storage device has the advantages of high energy storage density, simple structure, flexibility in regulation and control and the like.

Description

technical field [0001] The invention relates to the technical field of solar heat utilization and power generation, in particular to an indirect medium-temperature solar thermochemical energy storage device based on chemical chain combustion. Background technique [0002] At present, solar thermal power generation with photothermal conversion will become the most attractive solar technology in the next 20 to 30 years. However, due to the characteristics of low energy density, time discontinuity and uneven spatial distribution of solar energy, it is still impossible to completely replace fossil fuels with solar energy for a long period of time. [0003] Solar thermochemistry is the use of solar heat to drive endothermic chemical reactions, provide the heat required for the reaction, and convert the dispersed solar energy into fuels such as syngas or H2 with high energy density, storable, and transportable, and use them in the form of fuel storage. Energy storage is realized,...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the purpose of the present invention is to propose an indirect medium-temperature solar thermochemical energy storage device based on chemical looping combustion to solve the problems of high collector cost, complex structure, and limited materials in high-temperature solar thermochemistry. , to realize the effective utilization of medium-temperature solar heat

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