Calcium circulation cascade thermochemical energy storage method and system

An energy storage system and thermochemical technology, applied in the field of solar power generation, to achieve the effect of solving sintering, improving efficiency and achieving maximization

Active Publication Date: 2019-01-25
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, for CaCO in China 3 /CaO system and Ca(OH) 2 /C

Method used

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  • Calcium circulation cascade thermochemical energy storage method and system
  • Calcium circulation cascade thermochemical energy storage method and system
  • Calcium circulation cascade thermochemical energy storage method and system

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Embodiment 1

[0026] Such as figure 1 As shown, a conceptual diagram of calcium cycle cascade thermochemical energy storage, including primary energy storage (CaCO 3 energy storage) and secondary energy storage (Ca(OH) 2 Energy storage), energy storage is carried out through the interaction conversion between thermal energy generated by solar energy and chemical energy, primary energy storage: when there is sufficient sunlight during the day, CaCO 3 The particles undergo a thermal decomposition reaction through solar heat exchange and decompose into CaO and CO 2 Carry out primary energy storage; secondary energy storage: upper level CO 2 The residual heat can be used to exchange heat with water vapor, so that Ca(OH) 2 The particles undergo a thermal decomposition reaction and decompose into CaO and H 2 O for secondary energy storage; when energy is needed, CaCO 3 The CaO produced by particle decomposition will combine with H 2 O undergoes a reverse chemical reaction to release heat en...

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Abstract

The present invention relates to a calcium circulation cascade thermochemical energy storage method and system. The thermochemical energy storage system is CaCO3/CaO and Ca(OH)2/CaO, and can be used for energy storage by means of mutual reaction and conversion between heat energy and chemical energy produced by sun irradiation. Through a primary energy storage and a secondary energy storage, whenenergy is needed, part of CaO (generated by decomposition of CaCO3 particles under normal pressure) and H2O produce reverse chemical reaction to release heat energy, part of CaO (generated by decomposition of Ca(OH)2 particles under normal pressure) and CO2 produce reverse chemical reaction to release heat energy. Through alternate cyclic energy storage of CaCO3/CaO and Ca(OH)2/CaO systems, the sintering problem of CaCO3/CaO in the process of long-time cyclic energy storage can be solved, and cascade energy storage and two-stage power generation can also be achieved. In addition, the inventionfurther discloses a calcium circulation cascade thermochemical energy storage system.

Description

technical field [0001] The invention relates to the field of solar power generation, in particular to a calcium cycle cascade thermochemical energy storage method and system. Background technique [0002] Solar power generation has become one of the hot spots in the development of new energy in recent years, because solar energy has the advantages of wide distribution and environmental friendliness. However, due to the intermittent, unstable, and unsustainable supply of solar energy, there are still many technical problems to be solved urgently in the use of solar energy for thermal power generation. Therefore, how to ensure stable, efficient, and large-scale storage of solar energy and achieve continuous supply of solar power generation is an important issue. Its focus on thermal power generation. CaCO, which belongs to thermochemical energy storage 3 The / CaO system is non-toxic, safe, has a wide range of raw material sources and is cheap, green, and has no side reaction...

Claims

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Application Information

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IPC IPC(8): F24S60/20F24S20/20F28D20/00
CPCF28D20/003Y02E60/14Y02E70/30
Inventor 凌祥张冬王燕陈晓轶
Owner NANJING UNIV OF TECH
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