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Composite phase change heat storage material using edible fungus charcoal as shaping matrix and preparation method

A heat storage material and composite phase change technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of easy flow and low thermal conductivity of phase change, and achieve the effect of enhancing heat storage performance

Inactive Publication Date: 2018-09-21
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a solid-liquid phase change material, stearic acid has the defects of easy flow and low thermal conductivity. At present, loading stearic acid with porous matrix and other shaped materials can overcome the defects and broaden its application range

Method used

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  • Composite phase change heat storage material using edible fungus charcoal as shaping matrix and preparation method
  • Composite phase change heat storage material using edible fungus charcoal as shaping matrix and preparation method
  • Composite phase change heat storage material using edible fungus charcoal as shaping matrix and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh 10g of dried fungus in deionized water, soak at room temperature for 2h, put the soaked fungus and 200ml of deionized water into a polytetrafluoroethylene-lined high-pressure stainless steel hydrothermal reaction kettle, and react at 180°C for 24h to obtain Sepia powder, washed and dried many times to get hydrothermal carbonized fungus; mix hydrothermal carbonized fungus with KOH in a ratio of 1:3, put it in a vacuum tube furnace, and react at 800°C for 2 hours under Ar atmosphere. After the reaction is completed , the obtained primary product is washed and dried several times to obtain the fungus charcoal base material; the stearic acid and the fungus charcoal base material are mixed evenly at 4:1 and placed in the conical flask reaction container, and the vacuum device is opened to make the pressure in the container reach- After 0.05MPa, move the reaction vessel to a heating type ultrasonic cleaner and maintain it at 90°C for 20 minutes. After the reaction is com...

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Abstract

The invention discloses a composite phase change heat storage material using edible fungus charcoal as a shaping matrix and a preparation method. The designed heat storage material comprises the components of 30-90wt% of a phase change material and 10-70wt% of an edible fungus charcoal matrix material. The preparation method comprises the following steps: treating edible fungi by adopting a low-temperature hydrothermal carbonization method and a KOH high-temperature activation method sequentially to obtain the edible fungus charcoal matrix material, and loading a stearic acid phase change material to obtain the composite phase change heat storage material. The maximum stearic acid loading amount in the heat storage material can reach 77.51%, and the latent heat value is 144.8J / g. The heatstorage material is stable in components, good in composite effect and excellent in heat storage performance, and an operation technology in the preparation process is simple.

Description

technical field [0001] The invention belongs to the technical field of heat storage material preparation, and relates to a composite phase change heat storage material with fungus charcoal as a shaped matrix and a preparation method. Background technique [0002] The shortage of fossil energy and the increasing environmental problems have made human beings realize that the search for green renewable resources and the development of renewable energy applications have become urgent problems to be solved today. As the most abundant, longest-used, most widely distributed and non-polluting renewable energy, solar energy has become the main target of utilization worldwide. However, due to factors such as seasons and weather, solar energy resources are obviously intermittent, so solar heat storage technology is particularly important. [0003] Stearic acid organic phase change material, as a new energy-saving energy storage material, can store and release a large amount of latent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 李传常谢宝珊陈荐
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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