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Porous substrate phase-changing heat storage particles and preparation method thereof

A phase change heat storage and particle technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of flow, leakage, affecting the use effect, etc., to achieve simple preparation process, enhanced heat transfer function, low price Effect

Active Publication Date: 2014-01-15
重庆中防德邦防水技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the solid-liquid phase change energy storage materials developed at home and abroad mainly include inorganic and organic materials, but when the phase change material is in the liquid state, it often faces problems of flow and leakage, which affects its use effect, so Appropriate encapsulation treatment must be carried out, such as encapsulation, inorganic medium adsorption, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The broken aggregate of porous volcanic rock with a particle size of 19-26.5mm was taken, and the porosity was measured to be 43.8%. The domestic 64# paraffin wax with a phase transition temperature of 62°C and a phase transition latent heat of 196J / g was selected as the solid-liquid phase change material . Dry the porous aggregate at 105°C for 12 hours, put it into a conical flask, vacuumize it, and preheat it in a water bath at 75°C for 30 minutes under vacuum; The aggregate shall prevail, vacuum adsorption for 1 hour, and turn off the vacuum every 20 minutes; take out the adsorption particles and place them on a mesh screen to dry them, and immerse them in the mixed liquid of evenly prepared liquid epoxy A agent, curing component B agent and appropriate amount of graphite powder , stirring at a slow speed, so that the surface of the adsorbed particles is evenly covered with an epoxy film layer, take it out and spread it on a polytetrafluoroethylene board, pay attenti...

Embodiment 2

[0027] The broken aggregate of porous volcanic rock with a particle size of 16-19mm was taken, and the measured porosity was 39.2%. Polyethylene glycol 4000 with a phase transition temperature of 47°C and a latent heat of phase transition of 219J / g was selected as the solid-liquid phase change material . Dry the porous aggregate at 105°C for 12 hours, put it into a conical flask, vacuumize it, and preheat it in a water bath at 70°C for 30 minutes under vacuum; pour molten liquid polyethylene glycol 4000 into the conical flask of porous aggregate, The volume is based on submerged porous aggregates, vacuum adsorption for 1 hour, and turn off the vacuum every 20 minutes; take out the adsorbed particles and place them on a mesh screen to dry them, and immerse them in evenly prepared liquid epoxy A agent, curing component B agent and appropriate amount of graphite powder In the mixed liquid, stir at a slow speed so that the surface of the adsorbed particles is evenly coated with an...

Embodiment 3

[0029] The broken aggregates of porous volcanic rocks with a particle size of 13.2-16 mm were taken, and the measured porosity was 35.4%. Octadecanol with a phase transition temperature of 55 °C and a latent heat of phase transition of 250.3 J / g was selected as the solid-liquid phase change material. Dry the porous aggregate at 105°C for 12 hours, put it into a conical flask, vacuumize it, and preheat it in a water bath at 65°C for 30 minutes under vacuum; pour the molten stearyl alcohol into the conical flask of porous aggregate, the volume is Submerge the porous aggregate as the standard, vacuum adsorption for 1 hour, and turn off the vacuum every 20 minutes; take out the adsorption particles and place them on a mesh screen to dry them, and immerse them in uniformly prepared liquid unsaturated polyester agent A, curing component B agent and an appropriate amount of aluminum In the mixed liquid of powder, stir at a slow speed so that the surface of the adsorbed particles is ev...

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Abstract

The invention provides porous substrate phase-changing heat storage particles and a preparation method thereof. The method comprises: usingporous volcanic rock with developed apertures and good mechanical properties as a substrate material, absorbing a solid-liquid phase changing material in a substrate hole structure under a vacuum condition by using a good adsorption characteristic of the porous structure, and coating the external surface with thermosetting resin by an immersion method, wherein for improving heat conduction performance of the phase-changing particles, a heat conduction filler with a high heat conductive coefficient is added in coating material thermosetting resin. The prepared porous substrate phase-changing heat storage particles have characteristics of stable shape, low penetration, high conductivity, excellent heat storage effect and excellent mechanical properties.

Description

technical field [0001] The invention relates to a phase-change heat storage material, in particular to a porous base phase-change heat storage particle and a preparation method thereof, which can be applied to the fields of building energy-saving engineering, traffic engineering, civil engineering and the like. Background technique [0002] Since the energy crisis in the 1970s, the application of phase change energy storage technology in the field of industrial energy conservation and new energy has been paid more and more attention. As a result, the basic and applied research of phase change energy storage has risen rapidly and developed continuously in developed countries in the world. Its research and application involve the fields of material science, solar energy, engineering thermophysics, air conditioning, building energy saving, heating and industrial waste heat utilization. The use of phase change materials in building energy conservation research is an emerging tec...

Claims

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Application Information

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IPC IPC(8): C09K5/06C04B22/00
Inventor 曹雪娟何丽红朱洪洲邹晓翎刘唐志李菁若张一博
Owner 重庆中防德邦防水技术有限公司
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