Medium-and-low temperature calcium cycling thermochemical energy storage device and method

An energy storage device and thermochemical technology, applied in the field of solar power generation, can solve the problems of no patents, etc., and achieve the effects of simple structure, flexible control of variable working conditions, and high energy storage density

Active Publication Date: 2017-06-09
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present in China, Ca(OH) 2 / CaO system for thermochemical energy storage is still in its infancy, and there is no related patent

Method used

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  • Medium-and-low temperature calcium cycling thermochemical energy storage device and method
  • Medium-and-low temperature calcium cycling thermochemical energy storage device and method
  • Medium-and-low temperature calcium cycling thermochemical energy storage device and method

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The black straight line in the figure represents the energy storage process, the short horizontal dashed line represents the energy release process, the dotted dotted line represents the gas, and the wavy line represents the screw feeding.

[0028] as attached figure 1 As shown, a medium-low temperature calcium cycle thermochemical energy storage device of the present invention includes a solar thermal collector, an energy storage system and a power generation system;

[0029] The solar heat collecting device comprises a heliostat 1 and a solar absorbing tower 2, the heliostat 1 is arranged on one side of the solar absorbing tower 2, and the solar absorbing tower 2 is used for absorbing sunlight reflected by the heliostat 1;

[0030] The energy storage system includes a water tank 10, a water feed pump 11, a solar absorption tower 2, a...

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Abstract

The invention relates to a medium-and-low temperature calcium cycling thermochemical energy storage device and method. The device comprises a solar heat collection device, an energy storage system and a power generation system. According to the Ca(OH)2 / CaO thermochemical energy storage system, energy storage is conducted through interconversion between thermal energy and chemical energy, when solar irradiation is sufficient, Ca(OH)2 solid particles are subjected to an endothermic decomposition reaction under the action of high-temperature water vapor generated by solar energy, and received heat is stored in decomposition products, namely CaO and H2O, in a chemical energy form; when the heat is released, CaO and H2O are subjected to a backward thermochemical reaction at normal pressure, and the chemical energy stored in CaO and H2O are inversely converted into the thermal energy and released out. The device and method are high in energy storage density, high in cycle efficiency and environmentally friendly, the structure is simple, and flexible control and application under variable working conditions are achieved.

Description

technical field [0001] The invention relates to the technical field of solar power generation, in particular to a medium-low temperature calcium cycle thermochemical energy storage device and a method thereof. 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 characteristics of intermittent, low density, instability, and difficulty in continuous supply of solar energy, 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 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/00F24J2/34F28D20/00F22B1/00F01K27/02
CPCF01K27/02F22B1/006F24S20/40F24S60/00F28D20/003Y02E10/40Y02E60/14Y02E70/30
Inventor 凌祥陈晓轶王燕靳晓刚
Owner NANJING UNIV OF TECH
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