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A kind of phase change material, its preparation method and use

A technology of phase change material and nano-barium sulfate, which is applied in the field of its preparation and phase change materials, to achieve the effect of promoting crystallization, good thermal conductivity and high enthalpy value

Active Publication Date: 2018-07-06
天津启能新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no one has combined the two technologies for actual production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Get 50g of nano-barium sulfate, 50g of sodium hydrogen phosphate dodecahydrate (non-nano-level), porous metal-organic material MOF-5 (specific surface area 2500-3000m 2 / g) 80g, after mixing the above materials, vacuumize to 0MPa, and then ultrasonically treat for 50min to obtain the target phase change material.

[0036] It has been determined that the equivalent thermal conductivity of the phase change material prepared in this embodiment is 100 / (m·K), and the latent heat value is 220J·g-1 , and after 1000 cycles of cooling and heating (0-70°C), the latent heat of phase change only decreased by 6%.

[0037] The phase change material prepared in this embodiment was used in a photoelectric conversion device with reference to the method disclosed in the patent application CN102709397A. The test results showed that the photoelectric conversion efficiency of the solar photovoltaic module was increased by 20%.

Embodiment 2

[0039] Take 50g of barium sulfate (non-nano-level), 50g of sodium hydrogen phosphate dodecahydrate (non-nano-level), 80g of porous metal-organic material MOF-5, mix the above materials, vacuumize to 0MPa, and then ultrasonically treat for 50min to obtain target phase change material.

[0040] Measure with the method of embodiment 1: the equivalent thermal conductivity of the phase change material that this embodiment makes is 80 / (m K), and latent heat value is 201J g -1 , after 1000 cycles of cold and heat (0-70°C), the latent heat of phase change decreased by 8%.

Embodiment 3

[0042] Take 50g of sodium hydroxide monohydrate (non-nano-level), 50g of sodium hydrogen phosphate dodecahydrate (non-nano-level), and 80g of porous metal-organic material MOF-5, mix the above materials, vacuumize to 0MPa, and then ultrasonically treat for 50min , the target phase change material is obtained.

[0043] Measure with the method of embodiment 1: the equivalent thermal conductivity of the phase change material that this embodiment makes is 82 / (m K), and latent heat value is 202J g -1 , after 1000 cycles of cold and heat (0-70°C), the latent heat of phase change decreased by 8.5%.

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PUM

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Abstract

The invention belongs to the technical field of preparation of phase change energy storage materials, and concretely relates to a phase change material, and a preparation method and a use thereof. The phase change material comprises an energy storage material and a crystallized porous metal organic material. The preparation method of the phase change material comprises the following steps: mixing the energy storage material with the porous metal organic material, carrying out vacuum pumping at 80-200 DEG C until the pressure is 0-0.08 MPa, and carrying out ultrasonic treatment for 20-100 min to obtain the target phase change material. The phase change material prepared in the invention has the advantages of good stability, no supercooling phenomenon, large energy storage density and good heat conduction property, and can improve the photoelectric conversion efficiency by 20% when applied to photoelectric conversion devices.

Description

technical field [0001] The invention belongs to the technical field of preparation of phase-change energy storage materials, and in particular relates to a phase-change material, its preparation method and application. Background technique [0002] Research on energy storage is a strategic topic of energy security and sustainable development, in which heat storage and application are closely related to international people's livelihood. Energy storage technology, especially phase change energy storage technology, is an important technology to rationally and effectively utilize existing energy, optimize the use of renewable energy, and improve energy utilization efficiency. It has been a very active research direction in the field of energy conservation in the world in the past 20 years. [0003] Phase change energy storage refers to the storage and release of energy by using phase change materials to absorb or release heat when the phase changes. Compared with sensible heat ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06H02S40/42H02S40/44
CPCC09K5/063H02S40/42H02S40/44Y02E10/50Y02E10/60
Inventor 陈玲张尹
Owner 天津启能新能源科技有限公司
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