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Composite phase-change heat storage brick coated by refractory material

A technology of composite phase change and refractory materials, which is applied in the field of energy storage materials, can solve the problems of low strength of composite phase change heat storage materials, low utilization rate of energy storage materials, and decreased heat storage capacity, etc., and achieve a suitable operating temperature range , low price, increase the effect of heat loss

Pending Publication Date: 2017-03-22
赵岩 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a refractory material-coated composite phase change heat storage brick, in which a certain thickness of refractory material is coated on the surface of the composite phase change heat storage material, so as to solve the storage problem of inorganic phase change heat storage materials in the prior art. The utilization rate of energy materials is not high, the heat storage capacity continues to decline, and the existing composite phase change heat storage materials have low strength and low service life.

Method used

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  • Composite phase-change heat storage brick coated by refractory material
  • Composite phase-change heat storage brick coated by refractory material
  • Composite phase-change heat storage brick coated by refractory material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] In this embodiment, the preparation process of the composite phase change heat storage material is the inorganic salt phase change material Na 2 CO 3 , the ceramic material MgO, and the carbon fiber are mixed according to the parts by weight of 40 parts, 59.5 parts, and 0.5 parts, press-molded at 10 MPa, and sintered at 900° C. for 8 hours in a nitrogen atmosphere.

[0030] The refractory material is composed of calcium aluminate refractory cement, magnesia, silica powder, and flake graphite according to the weight of 10 parts, 60 parts, 20 parts, and 10 parts. After mixing in a small cement mortar mixer for 2 to 3 minutes, the stirring At the same time, slowly add water to make the water-material ratio 0.50. Coat the refractory material on the surface of the composite phase change heat storage material with a coating thickness of 30 mm, and then cure it naturally for 3 days and dry it at 110°C for 24 hours.

[0031] In this example, the endothermic peak of the refrac...

Embodiment 2

[0033] In this embodiment, the preparation process of the composite phase change heat storage material is the inorganic salt phase change material Na 2 CO 3 (57wt%) and Li 2 CO 3 (43wt%) eutectic salt, ceramic material MgO, and high thermal conductivity material flake graphite were mixed in parts by weight of 40 parts, 59.5 parts, and 0.5 parts, and were pressed and formed at 10 MPa, and treated at 200 ° C for 24 hours.

[0034] The refractory material is made of magnesium aluminate, magnesia, and flake graphite according to the weight of 6 parts, 89 parts, and 5 parts. After mixing in a small cement mortar mixer for 2 to 3 minutes, slowly add 5 parts of water while stirring. . Coat the refractory material on the surface of the composite phase change heat storage material with a coating thickness of 20mm, pressurize at 200MPa, and dry at 180°C for 48 hours.

[0035] In this example, the endothermic peak of the refractory-coated composite phase-change thermal storage brick ...

Embodiment 3

[0037] In this embodiment, the preparation process of the composite phase change heat storage material is the inorganic salt phase change material Na 2 SO 4 , ceramic material SiO 2 The powder and graphite flake, a high thermal conductivity material, are mixed according to parts by weight of 40 parts, 59.5 parts and 0.5 parts, and are pressed and formed by 10 MPa.

[0038] Refractories made of MgCl 2 , magnesia and graphite flakes are mixed according to the parts by weight of 2 parts, 93 parts and 5 parts, and mixed in a small cement mortar mixer for 2 to 3 minutes, and slowly add 8 parts of water while stirring. Coat the refractory material on the surface of the composite phase change heat storage material with a coating thickness of 35mm, pressurize at 150MPa, and dry at 110°C for 48 hours.

[0039] In this example, the endothermic peak of the refractory-coated composite phase-change thermal storage brick appears at 882°C.

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Abstract

The invention specifically relates to a composite phase-change heat storage brick coated by a refractory material, belonging to the field of energy storage materials. A composite phase-change heat storage material composed of an inorganic phase-change material and a ceramic material is coated by the refractory material with a certain thickness; the composite phase-change heat storage material is a standard brick, common brick or special-shape brick with a certain size and a certain shape; and highly-heat-conducting materials like amorphous graphite, crystalline flake graphite, carbon fibers, carbon nanotubes and copper slag are added into the composite phase-change heat storage material and the refractory material. The composite phase-change heat storage brick coated by the refractory material meets the requirements of a heat storage medium for high heat storage capability and good heat conduction capability and improves the strength, heat storage stability and long-term operation reliability of the heat storage material. The composite phase-change heat storage brick coated by the refractory material makes full use of sensible heat and latent heat heat-storage methods, can effectively the efficiency of energy utilization, protectes the environment and has critical application prospects in fields like utilization of solar heat, storage of off-peak electricity, recycling of industrial waste heat and energy conservation of industrial and civil buildings and air-conditioners.

Description

technical field [0001] The invention belongs to the field of energy storage materials, and in particular relates to a composite phase-change thermal storage brick coated with a refractory material. Background technique [0002] Energy is the basis for human survival. The energy problem is one of the most serious problems facing my country's economic and social development. The development and utilization of energy is a key factor and important issue related to my country's sustainable development and people's quality of life. Development The key technologies of renewable energy, waste heat recovery and energy conservation have important application value. [0003] There are often differences in quantity, form and time between heat supply and demand. It is necessary to use heat storage technology and other means to store and release heat to make up for these differences and make effective use of heat sources. Heat storage methods usually use sensible heat, chemical reaction a...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/04C04B35/66C04B41/87C04B35/14C09K5/06
CPCC09K5/063C04B35/04C04B35/14C04B35/66C04B35/80C04B41/009C04B41/5029C04B41/5032C04B41/508C04B41/87C04B2235/9607C04B2235/3418C04B2235/3222C04B2235/5248C04B2235/425C04B2235/448C04B2235/442
Inventor 赵岩王德元
Owner 赵岩
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