Porous honeycomb heat storage structure

Patent metadata

Field	Value
Publication number	US-11015876-B2
Application number	US-201916518123-A
Country	US
Kind code	B2
Filing date	Jul 22, 2019
Priority date	Mar 8, 2017
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

an area ratio in a range from 60% to 90% with respect to a cross sectional area of a honeycomb cross section orthogonal to an axial direction of the honeycomb structure.

First claim

The invention claimed is:

1. A porous honeycomb heat storage structure comprising:
a honeycomb structure which has a porous partition wall which defines a plurality of cells extending from one end face to another end face and allows a reaction medium to flow into the cells; and
a heat storage portion which is configured by filling a heat storage material performing heat storage and heat dissipation by a reversible chemical reaction with the reaction medium or physical adsorption/desorption in at least a portion of each cells,
wherein the heat storage portion has an area ratio in a range from 60% to 90% with respect to a cross sectional area of a honeycomb cross section orthogonal to an axial direction of the honeycomb structure
wherein the cells are configured to include at least two types of first cells, and, second cells having a cell shape different from a cell shape of the first cells, the first cells and the second cells are arranged according to a predetermined arrangement standard, and
a first cells total open frontal area indicating a ratio of a total opening area of all the first cells in a honeycomb cross section with respect to the honeycomb cross section is set to be larger than a second cells total open frontal area indicating a ratio of total opening areas of all the second cells in the honeycomb cross section with respect to the honeycomb cross section, in the first cells, the heat storage portion is formed in all the first cells, and in the second cells, the heat storage portion is formed in all the second cells or at least a portion of the second cells.

2. The porous honeycomb heat storage structure according to claim 1 , further comprising:
a plugging portion which plugs the one end face and the other end face of the cells by a plugging material so as to enclose the heat storage material in the cells, wherein the plugging portion has a porosity of 48% or more.

3. The porous honeycomb heat storage structure according to claim 1 , wherein
the cells are formed by any one of combinations among a combination in which the first cells are pentagonal and the second cells are rectangular, a combination in which the first cells are octagonal and the second cells are rectangular, a combination in which the first cells are hexagonal and the second cells are rectangular, and a combination in which the first cells are hexagonal and the second cells are triangular.

4. The porous honeycomb heat storage structure according to claim 1 , wherein the partition wall of the honeycomb structure has a thermal conductivity of 10 W/mK or more.

5. The porous honeycomb heat storage structure according to claim 1 , wherein the partition wall of the honeycomb structure has a porosity in a range of 35% to 80%.

6. The porous honeycomb heat storage structure according to claim 1 , wherein the heat storage material includes at least any one of an alkaline earth metal oxide and an alkaline earth metal chloride as the main component.

7. The porous honeycomb heat storage structure according to claim 1 , wherein the honeycomb structure is configured to include a Si/SiC based ceramic material as the main component.

Assignees

• Ngk Insulators Ltd

Inventors

• Miyairi Yukio
• Miwa Shinichi

Classifications

• Y02E60/14

  Thermal energy storage · CPC title

• C04B38/0012

  characterised by the material used for sealing or plugging (some of) the channels of the honeycombs · CPC title

• C04B2235/3213

  Strontium oxides or oxide-forming salts thereof · CPC title

• C04B2235/3208

  Calcium oxide or oxide-forming salts thereof, e.g. lime · CPC title

• C09K5/16

  Materials undergoing chemical reactions when used · CPC title