CN-121994056-A - Heat storage body based on cooperation of asymmetric dissipation structure and electromagnetic field and preparation method

CN121994056ACN 121994056 ACN121994056 ACN 121994056ACN-121994056-A

Abstract

The invention provides a heat storage body based on cooperation of an asymmetric dissipation structure and an electromagnetic field and a preparation method thereof, comprising the following steps: the energy storage device comprises a spiral framework, a stress buffer layer and an energy storage core layer, wherein the spiral framework is provided with an asymmetric hyperboloid structure, the inner wall of the asymmetric hyperboloid structure is different from the outer curvature, the spiral framework is made of steel slag, the stress buffer layer is made of negative thermal expansion ceramic materials and covers the outer wall of the spiral framework, and the energy storage core layer is made of solid waste base composite phase change materials and is filled in the spiral framework. The heat storage device has the advantages that through the arrangement of the spiral framework, the radiation heat dissipation effect can be enhanced, the temperature gradient is reduced, the internal stress and the thermal stress are effectively restrained, the service life is prolonged, through the arrangement of the stress buffer layer, the energy storage core layer can be prevented from being greatly contracted, the damage effect of the thermal stress on the heat storage body is further relieved, and through the arrangement of the energy storage core layer, the uniformity of an internal thermal field can be actively regulated, and the crack growth and collapse caused by uneven thermal stress are effectively restrained.

Inventors

TAN ZENGQIANG
LI FULIN
LI JIANGAO
SU FANGWEI
XIE XIAOJUN
WANG TUANJIE
GAO YANG
XUE XIN
LI XINGWANG
Lian Xiaohan

Assignees

华能沁北发电有限责任公司
西安热工研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20260108

Claims (10)

1. A heat storage body based on an asymmetric dissipative structure in conjunction with an electromagnetic field, comprising: The spiral framework is provided with an asymmetric hyperboloid structure, the curvature of the inner wall and the curvature of the outer wall of the asymmetric hyperboloid structure are different, and the spiral framework is made of steel slag; The stress buffer layer covers the outer wall of the spiral framework and is made of negative thermal expansion ceramic materials; The energy storage core layer is filled in the spiral framework, and is composed of solid waste based composite phase change materials.
2. The heat storage body based on an asymmetric dissipative structure in conjunction with an electromagnetic field according to claim 1, wherein the pitch of the spiral skeleton is gradually increasing from bottom to top in the axial direction.
3. The heat storage body based on an asymmetric dissipative structure in conjunction with an electromagnetic field according to claim 2, wherein the pitch of the spiral skeleton increases from 5mm at its bottom to 20mm at its top.
4. The heat storage body based on an asymmetric dissipative structure in conjunction with an electromagnetic field according to claim 1, wherein the wall thickness of the spiral skeleton satisfies the formula: d=k*(α+β)/lnβ; Where k is a constant, α is a helix angle, and β is a curved hyperbolic angle.
5. The heat storage body based on the asymmetric dissipative structure in conjunction with an electromagnetic field according to claim 1, wherein the stress buffer layer comprises at least one negative thermal expansion material of zrbo, hfMo 2 O 8 or ZrV 2 O 7 , and steel slag micropowder is added as matrix.
6. The heat storage body based on an asymmetric dissipative structure in conjunction with an electromagnetic field according to claim 5, wherein the stress buffer layer comprises ZrWO and steel slag, the ZrWO volume fraction is 15%.
7. The heat storage body based on the cooperation of an asymmetric dissipation structure and an electromagnetic field according to claim 6, wherein the ZrWO is arranged in a nanoribbon form in a direction opposite to the spiral rotation direction.
8. The heat storage body based on the cooperation of an asymmetric dissipation structure and an electromagnetic field according to claim 1, wherein the energy storage core layer is made of solid waste base composite phase change materials, and the components are slag, steel slag, coke and metallic iron=2:1:1:2 in a molar ratio.
9. The heat storage body based on the cooperation of the asymmetric dissipation structure and the electromagnetic field according to claim 8, wherein the phase transition temperature of the solid waste based composite phase change material is 800 ℃, and the phase transition latent heat is 200J/g.
10. A method of manufacturing a heat storage body based on an asymmetric dissipative structure in combination with an electromagnetic field according to any of claims 1-9, comprising the steps of: S1.3D printing a spiral skeleton, namely printing a raw material containing steel slag into an asymmetric hyperboloid structure; S2, preparing a stress buffer layer, namely coating slurry containing ZrWO nano-belts on the outer wall of the spiral framework, applying a reverse magnetic field of 0.5T, sintering and forming at 900 ℃, and cooling to obtain the stress buffer layer; S3, preparing an energy storage core layer, namely injecting a molten solid waste base composite phase change material into the spiral framework, and carrying out vibration treatment to obtain a solid waste base high-temperature heat storage body; S4, alternating electromagnetic field treatment, namely placing the solid waste base high-temperature heat storage body into the alternating electromagnetic field to perform thermal stress inhibition treatment.

Description

Heat storage body based on cooperation of asymmetric dissipation structure and electromagnetic field and preparation method Technical Field The embodiment of the invention belongs to the technical field of high-temperature heat storage, and particularly relates to a heat storage body based on cooperation of an asymmetric dissipation structure and an electromagnetic field and a preparation method thereof. Background In the field of development and application of solid waste-based high-temperature heat storage bodies, as shown in reference patents CN119980356a and CN120289149a in the prior art, although certain achievements are achieved in terms of suppressing thermal stress and improving material performance, these technologies still have limitations in terms of coping with thermal stress control and energy efficient storage under high-temperature working conditions. The service life of the electrolytic tank is effectively prolonged by the gradient structural design and the application of the composite material of the reference patent CN119980356A, however, the active regulation and control of the thermal stress of the solid waste base high-temperature heat accumulator are not involved, and the thermal expansion coefficient compensation mechanism of the material at high temperature is not enough. Although the patent CN120289149a provides an innovative scheme in the aspect of multi-scale toughening of concrete, the technical principle of the patent CN120289149a has essential differences with the thermal stress control and energy storage mechanism of the high-temperature heat storage body, and a solution for the solid waste-based high-temperature heat storage body cannot be provided. Disclosure of Invention The embodiment of the invention aims at solving at least one of the technical problems existing in the prior art and provides a heat storage body based on the cooperation of an asymmetric dissipation structure and an electromagnetic field and a preparation method thereof. An embodiment of an aspect of the present invention provides a heat storage body based on cooperation of an asymmetric dissipation structure and an electromagnetic field, including: The spiral framework is provided with an asymmetric hyperboloid structure, the curvature of the inner wall and the curvature of the outer wall of the asymmetric hyperboloid structure are different, and the spiral framework is made of steel slag; The stress buffer layer covers the outer wall of the spiral framework and is made of negative thermal expansion ceramic materials; The energy storage core layer is filled in the spiral framework, and is composed of solid waste based composite phase change materials. In some embodiments of the invention, the pitch of the helical backbone increases gradually from bottom to top in the axial direction. In some embodiments of the invention, the pitch of the helical backbone increases from 5mm at its bottom to 20mm at its top. In some embodiments of the invention, the wall thickness of the spiral backbone satisfies the formula: d=k*(α+β)/lnβ; Where k is a constant, α is a helix angle, and β is a curved hyperbolic angle. In some embodiments of the invention, the stress buffer layer comprises at least one negative thermal expansion material of zwo, hfMo 2O8, or ZrV 2O7, and steel slag micropowder is added as a matrix. In some embodiments of the invention, the stress buffer layer comprises ZrWO and steel slag, and the volume fraction of ZrWO is 15%. In some embodiments of the present invention, zrWO are arranged in a nanoribbon orientation, the direction of arrangement being opposite to the direction of rotation of the helix. In some embodiments of the invention, the energy storage core layer is composed of solid waste based composite phase change material, and the components are slag, steel slag, coke and metallic iron=2:1:1:2 in a molar ratio. In some embodiments of the present invention, the phase transition temperature of the solid waste based composite phase change material is 800 ℃ and the phase transition latent heat is 200J/g. The second aspect of the present invention provides a method for preparing a heat storage body based on cooperation of an asymmetric dissipation structure and an electromagnetic field according to any one of the above embodiments, comprising the steps of: S1.3D printing a spiral skeleton, namely printing a raw material containing steel slag into an asymmetric hyperboloid structure; S2, preparing a stress buffer layer, namely coating slurry containing ZrWO nano-belts on the outer wall of the spiral framework, applying a reverse magnetic field of 0.5T, sintering and forming at 900 ℃, and cooling to obtain the stress buffer layer; S3, preparing an energy storage core layer, namely injecting a molten solid waste base composite phase change material into the spiral framework, and carrying out vibration treatment to obtain a solid waste base high-temperature heat storage body; S4, alternating electromagn