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Inorganic salt phase-change cold accumulation material

A phase-change cold storage, inorganic salt technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of high degree of subcooling, poor working performance, and important relations, and achieve low degree of subcooling and stable circulation. The effect of good performance and high energy storage density

Active Publication Date: 2013-08-14
杭州鲁尔新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the only cooling source for the last 1 km of the cold chain, the phase change cold storage material will directly lead to the useless effect of the front end of the cold chain if its performance is not good, which is of great importance
At present, the understanding of the role and significance of phase change cold storage is generally not high. There are few researches on phase change cold storage materials, and there is a lack of systematic research and development. This is currently the biggest challenge in the field of phase change cold storage materials research. question
In the inorganic salt cold storage agent developed now, sodium sulfate is mainly used as the main raw material, but its melting process is non-uniform melting, and there are problems such as high degree of supercooling, poor cycle stability, poor thermal conductivity, and unadjustable phase transition temperature. , these factors lead to the failure of the phase change cool storage agent to play its due role

Method used

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  • Inorganic salt phase-change cold accumulation material
  • Inorganic salt phase-change cold accumulation material
  • Inorganic salt phase-change cold accumulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Pour 200mL of water into a 500mL beaker, add 56g of sodium chloride at a temperature of 25°C, stir until completely dissolved, then raise the temperature to 35°C, add 2.24g of sodium tetraborate to dissolve, add 1.12g of bentonite and stir for 10 minutes A phase change cold storage material is obtained.

[0018] Through the three-layer calorimeter test of w&a company, the phase change latent heat of the phase change cold storage material is 285J / g, and the supercooling degree is 0.9℃

[0019] The test result of this embodiment is as figure 2 shown.

Embodiment 2

[0021] Pour 300mL of water into a 500mL beaker and add 79.8g of Mgcl at a temperature of 25°C 2 , stir until completely dissolved, then warm up to 35°C, add 4g of sodium tetraborate to dissolve, add 1.6g of bentonite and stir for 10 minutes, then add sodium alginate according to the standard of 5g of sodium alginate / 100mL solution and fully swell to obtain a phase change cold storage material.

[0022] Through the three-layer calorimeter test of w&a company, the phase change latent heat of the phase change cold storage material is 220J / g, and the supercooling degree is 2.5°C

[0023] The test result of this embodiment is as image 3 shown.

Embodiment 3

[0025] Pour 200mL of water into a 500mL beaker, add 44g of sodium nitrate at a temperature of 25°C, stir until completely dissolved, then raise the temperature to 35°C, add 1.32g of silica and 2.2g of bentonite and stir for 10 minutes to obtain a phase transition cold storage material.

[0026] Through the three-layer calorimeter test of w&a company, the phase change latent heat of the phase change cold storage material is 232J / g, and the supercooling degree is 0.8℃

[0027] The test result of this embodiment is as Figure 4 shown.

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Abstract

The invention discloses an inorganic salt phase-change cold accumulation material which is prepared from the following raw materials in parts by weight: 100 parts of a 15-25% inorganic salt solution, 1-7 parts of a nucleation agent and 2-15 parts of a thickening agent. Inorganic salt is used as an inorganic phase-change material. The inorganic salt phase-change cold accumulation material has the advantages that the phase-change latent heat is high (can reach 200-400J / g); the heat conductivity coefficient is good (when being compared with an organic phase-change energy accumulation material); no toxin exists and a pH (Potential of Hydrogen) value is neutral; and the price is low. According to the inorganic salt phase-change cold storage material disclosed by the invention, compared with the prior art (the phase-change latent heat is in a range of 100-200J / g), the inorganic salt phase-change cold accumulation material has the advantages of high energy storage density, small condensate depression and good circulatory stability.

Description

technical field [0001] The invention relates to a phase change energy storage material, in particular to an inorganic salt phase change cold storage material used for cold chain transportation. Background technique [0002] Phase change materials (Phase Change Materials, PCMs) refer to the process of phase change, which can absorb heat from the environment or release heat to the environment, so as to achieve the purpose of energy storage and release, and solve the problem of energy supply and demand in time and space. mismatched contradictions. Taking advantage of this feature, PCM has broad application prospects in the fields of solar energy utilization, "peak shifting and valley filling" of electricity, waste heat and waste heat recovery, energy-saving building materials, energy saving of air conditioners, and food preservation. At the same time, because the temperature is approximately constant during the phase transition, it can be used to adjust and control the tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCY02E60/147Y02E60/14
Inventor 支晓华黄晓柳黄莉
Owner 杭州鲁尔新材料科技有限公司
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