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Composite phase change material, preparation method of composite phase change material, energy storage slurry and energy storage floor board

A composite phase change material and floor technology, applied in heat exchange materials, chemical instruments and methods, buildings, etc., can solve the problems of low thermal conductivity, large volume change, easy leakage of phase change materials, etc., and achieve high thermal conductivity. , The effect of high energy storage density and meeting the requirements of mechanical strength

Inactive Publication Date: 2017-06-20
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problems of easy leakage, low thermal conductivity, overcooling, and large volume change during the phase change process in the existing phase change materials

Method used

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  • Composite phase change material, preparation method of composite phase change material, energy storage slurry and energy storage floor board
  • Composite phase change material, preparation method of composite phase change material, energy storage slurry and energy storage floor board

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Embodiment 1

[0030] The composite phase change material provided by the embodiment of the present invention includes an organic phase change material and an inorganic carrier, the organic phase change material is filled in the pores of the inorganic carrier, the organic phase change material is polyethylene glycol, and the inorganic carrier is expanded graphite, polyethylene glycol The mass ratio of diol to expanded graphite is 11.5:1.

[0031] The composite phase change material of the present invention uses polyethylene glycol as the phase change material, expanded graphite as the support and enhanced heat transfer material, and is negatively pressured in a constant temperature drying oven with a pressure of -0.05Mpa and a temperature of 70°C at a mass ratio of 11.5:1. The composite phase change material was prepared by adsorption for 10 minutes. Expanded graphite has a high thermal conductivity and a well-developed network pore structure. Through the capillary action of the micropores, ...

Embodiment 2

[0039] The present invention also provides an energy storage mortar, including cement, water, water reducing agent, early strength agent and the composite phase change material of Example 1, the mixture of cement, composite phase change material, water, water reducing agent and early strength agent The ratio is 1:≤0.9:0.8~1:0.005:0.02.

[0040] The energy storage mortar of the present invention is a phase change energy storage cement mortar prepared by mixing cement, water, composite phase change materials, early strength agents, and water reducing agents in a certain proportion. The variable material replaces the standard sand, and a certain proportion of water reducer and early strength agent is added to accelerate the solidification. Finally, the ratio of cement, composite phase change material, water, water reducer and early strength agent in the energy storage mortar is 1: ≤0.9:0.8~1:0.005:0.02. The energy-storage mortar of the invention is lightweight and energy-storing...

Embodiment 3

[0042] Such as figure 1 and figure 2 As shown, the present invention also provides an energy storage floor, comprising a concrete layer 1, a thermal insulation board 2, an energy storage mortar layer 3, a capillary network 4, a leveling layer 5 and a floor layer 6 laid sequentially from bottom to top, and the energy storage mortar Layer 3 is composed of the energy-storage mortar of the second embodiment.

[0043]The energy-storage floor of the invention is an energy-storage floor that applies energy-storage mortar to a terminal device of a building heating system after natural curing. The popularization and application of the energy storage floor and its heating system of the present invention in solar energy, air source heat pump, ground source heat pump heating systems or passive solar buildings can reduce building energy consumption and improve indoor thermal environment stability and comfort. Effect. The energy storage mortar layer is combined with the capillary networ...

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Abstract

The invention relates to the technical field of a heating tail end device, in particular to a composite phase change material, a preparation method of the composite phase change material, energy storage slurry and an energy storage floor board. The composite phase change material comprises an organic phase change material and an inorganic carrier, wherein the organic phase change material is fully filled in pores of the inorganic carrier, and is polyethylene glycol; the inorganic carrier is expanded graphite; the mass ratio of the polyethylene glycol to the expanded graphite is 11.5:1. The composite phase change material provided by the invention uses the polyethylene glycol as the phase change material, and uses the expanded graphite as a support and enhancing heat transfer material. The polyethylene glycol and the expanded graphite are subjected to negative pressure adsorption for 10 min in a constant temperature drying box at the pressure being -0.05 Mpa and the temperature being 70 DEG C according to a mass ratio of 11.5:1 to obtain the composite phase change material. The expanded graphite has the advantages that the heat conduction coefficient is high; the developed reticular hole type structures are realized; through the capillary effects of the micropores, the phase change material of the polyethylene glycol is adsorbed into the micropores, so that the leakage of the liquid-state phase change material is effectively avoided; the heat conduction performance of the phase change material is improved; meanwhile, the volume is basically unchanged in the phase change process.

Description

technical field [0001] The invention relates to the technical field of heating terminal devices, in particular to a composite phase change material and a preparation method thereof, energy storage mud and an energy storage floor. Background technique [0002] At present, radiant floor heating has gradually become one of the most popular forms of heating in the field of building heating due to its advantages such as high apparent temperature, good indoor thermal comfort, and saving indoor space. The water temperature of floor radiant heating can meet the basic needs of heat users at 40°C-50°C. Therefore, the use of low-grade heat sources such as solar energy and shallow geothermal energy for heating, and efficient clean technologies such as energy storage materials for off-peak electricity and energy storage are the focus of future research. . The research, development and application of energy-storage and temperature-regulating building components has great engineering appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C04B24/32C04B28/00E04F15/02E04F15/18
CPCC09K5/063C04B28/00C04B40/0039C04B2103/0071E04F15/02E04F15/181E04F2290/04C04B14/024C04B24/32C04B2103/12C04B2103/302
Inventor 张群力孙东晗饶阳王明爽
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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