High-temperature calcium cycling thermochemical energy storage method and system

An energy storage system and thermochemical technology, applied in the field of solar power generation, can solve the problem of no patent, etc., and achieve the effects of simple structure, high cycle efficiency, and flexible control of variable working conditions.

Active Publication Date: 2017-04-26
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, domestic CaCO 3 / CaO system for thermochemical energy storage is still in its infancy, and there is no related patent

Method used

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  • High-temperature calcium cycling thermochemical energy storage method and system
  • High-temperature calcium cycling thermochemical energy storage method and system
  • High-temperature calcium cycling thermochemical energy storage method and system

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Embodiment 1

[0023] like figure 1 As shown, a high-temperature calcium cycle thermochemical energy storage system, the system solar heat collector, energy storage device and power generation device;

[0024]The solar heat collecting device comprises a heliostat (1), a solar absorption tower (2), a heat exchanger A (3) and a cold air storage tank (4), and the heliostat (1) is arranged on the solar absorption tower (2). ), so that the sunlight reflected by the heliostat (1) can be absorbed by the solar absorption tower (2), and the solar absorption tower (2), heat exchanger A (3) and cold air storage tank (4) The circulation pipeline is connected in sequence;

[0025] The energy storage device includes a powder heat exchanger B (5), a high-temperature vibrating fluidized reactor (6), a powder heat exchanger C (7), a high-temperature CaO storage tank (8), a high-temperature CaCO 3 storage tank (9), mill (10), compressor A (11), CO 2 storage tank (12) and gate valve B (18), the CO 2 The ou...

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Abstract

The invention relates to a high-temperature calcium cycling thermochemical energy storage method and system. An adopted thermochemical energy storage system is CaCO3 / CaO; energy storage is carried out through mutual conversion between thermal energy and chemical energy; when solar irradiation is sufficient, CaCO3 solid particles can be subjected to divided heating in hot air generated by solar energy and a heat absorption decomposition reaction is carried out, so that received heat is stored in decomposed products including CaO and CO2 in a chemical energy form; and when the heat is needed, a reversed thermochemical reaction is carried out on the CaO and the CO2 under normal pressure, and the chemical energy stored in the CaO and the CO2 is reversely converted into the thermal energy and is released. The high-temperature calcium cycling thermochemical energy storage method and system have the characteristics of high energy storage density, high cycling efficiency, environment friendliness, simple structure, flexibility in controlling under variable conditions and reliability in application; the problem of power generation and continuous and efficient operation of a solar high-temperature thermal power plant can be solved; and the high-temperature calcium cycling thermochemical energy storage method and system can be widely applied to the field of solar high-temperature power generation and are also applicable to high-temperature thermal energy storage and regeneration of other types of power plants.

Description

technical field [0001] The invention relates to the field of solar power generation, and specifically relates to a high-temperature calcium cycle thermochemical energy storage method and system. Background technique [0002] Solar power has the advantages of wide sources and no pollution to the environment, making it an ideal alternative energy source. However, due to the intermittent, low-density and unstable characteristics of solar energy, and the difficulty of continuous supply, there are still many problems to be solved in the use of solar energy for thermal power generation. Among them, how to realize efficient and large-scale storage of solar energy and ensure the continuous supply of solar power generation The key technology of solar thermal power generation. Among the main heat storage methods such as sensible heat energy storage, latent heat energy storage, and thermochemical energy storage, thermochemical energy storage has significant advantages such as high ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D20/00F24J2/32F24J2/10F24S10/95F24S23/70
CPCF28D20/003F24S10/90F24S23/70F24S20/20F24S60/20Y02E10/44Y02E10/47Y02E60/14Y02E70/30F24S30/452
Inventor 凌祥陈晓轶王燕靳晓刚
Owner NANJING UNIV OF TECH
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