A method and device for collecting heat and storing energy by solar energy double-cavity metal oxide particles

Abstract

The invention relates to a heat collection and energy storage method of solar dual-cavity type metallic oxide particles and a device thereof. Focused sunlight enters into a light suction cavity of a dual-cavity type heat collection reactor to heat a separating plate surface and preheat the metallic oxide particles; the preheated metallic oxide particles enter into a reaction cavity; the metallic oxide particles are heated and reduced along the temperature raising to release oxygen; the released oxygen is output through a gas outlet of the reaction cavity; the reduced metallic oxide particles are output through a particle outlet of the reaction cavity; the reduced metallic oxide particles enter into a restored particle storage box, and then enter into an oxidation heat exchanger to react with the oxygen from the gas outlet of the reaction cavity to release stored chemical energy; the chemical energy is transmitted to a heated working substance; the oxidized metallic oxide particles enter into an oxidized particles storage box and then enter into a light suction cavity particle inlet through a particle conveying device, and air is led in from the environment so as to control the gas flow of the reactor and the reaction rate of the oxidation heat exchanger; the entered air exchanges heat with the residual gas in the oxidation heat exchanger in advance to improve efficiency.

Description

technical field [0001] The invention relates to the field of solar thermochemical energy storage, in particular to a solar energy double-cavity metal oxide particle heat collection energy storage method and a device thereof. Background technique [0002] The total global solar radiation is about 1.7×10 17 W, of which my country accounts for about 1% (1.8×10 15 W, equivalent to 1.9 trillion tons of standard coal per year), is 680 times the current total annual energy consumption in my country, and solar energy has huge development potential. However, the energy flow density of solar energy is relatively low, the energy fluctuation is relatively large, and the storage cost is high. If photovoltaic grid-connected power generation is used, the impact on the grid is relatively large. These problems have always affected the further development and utilization of solar energy. The solar thermochemical method is to focus sunlight through concentrators, increase the energy flow den...

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Problems solved by technology

[0005] The present invention provides a solar energy double-cavity metal oxide particle thermal energy storage device for the problems that the existing gas chemical energy storage is not easy to store and the high-temperature sealing is difficult and easy to be polluted caused by the use of quartz glass in general chemical reactors. and its methods

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