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Phase change cold storage material and preparation method thereof

A technology of phase change cold storage and raw materials, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of large hysteresis effect of phase change temperature, impossibility of long-term use, poor cycle stability, etc., and achieve easy production and cycle life Long, high water absorption and stability effect

Pending Publication Date: 2022-03-25
北京中凯新科科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, organic thickeners such as sodium carboxymethyl cellulose and sodium polyacrylate are widely used, but these thickeners have poor cycle stability and are easy to decompose after long-term use.
Chinese patent CV101760182A reports the phase change cold storage system of sodium sulfate decahydrate using sodium carboxymethyl cellulose as a thickener. The addition of sodium carboxymethyl cellulose leads to a large phase change temperature hysteresis effect, and it is easy to be corrupted and degraded, so it cannot be used for a long time. use

Method used

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  • Phase change cold storage material and preparation method thereof
  • Phase change cold storage material and preparation method thereof
  • Phase change cold storage material and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0021] The phase change cold storage material in this embodiment is composed of the following raw materials in mass percentage: 59.4% sodium sulfate decahydrate, 5.0% sodium chloride, 14.8% ammonium bromide, 2.5% borax, 3.5% superabsorbent resin and deionized Water 14.8%.

[0022] The phase change cold storage material in this embodiment is prepared according to the following steps:

[0023] S1. Take 240g of sodium sulfate decahydrate, 20g of sodium chloride, 60g of ammonium bromide, and 10g of borax, and add them to the reaction kettle in sequence, mix and stir evenly, and control the mixing temperature at 50°C.

[0024] S2. Add 14g of superabsorbent resin and 60g of deionized water in sequence in the beaker. After the superabsorbent resin is fully absorbed, add it to the reaction kettle, mix with the raw materials in the reaction kettle and stir for 30 minutes.

[0025] S3. Turn off the stirring, and cool to room temperature to obtain a uniform paste, which is the phase cha...

Embodiment 2

[0028] The phase change cold storage material in this embodiment is composed of the following raw materials in mass percentage: 67.6% sodium sulfate decahydrate, 3.4% sodium chloride, 16.9% ammonium bromide, 2.3% borax, 3.2% superabsorbent resin and deionized Water 6.8%.

[0029] S1. Take 300g of sodium sulfate decahydrate, 15g of sodium chloride, 75g of ammonium bromide, and 10g of borax, and add them to the reaction kettle in sequence, mix and stir evenly, and control the mixing temperature at 60°C.

[0030] S2. Add 14g of superabsorbent resin and 30g of deionized water in sequence in the beaker. After the superabsorbent resin is fully absorbed, add it to the reaction kettle, mix with the raw materials in the reaction kettle and stir for 45 minutes.

[0031] S3, turn off the stirring, and cool to room temperature to obtain a uniform paste, which is the phase change cold storage material 2.

[0032] Perform performance tests on phase change cold storage materials 2, such as ...

Embodiment 3

[0034] The phase change cold storage material in this embodiment is composed of the following raw materials in mass percentage: 46% sodium sulfate decahydrate, 9.2% sodium chloride, 17.5% ammonium bromide, 3% borax, 4% superabsorbent resin and deionized Water 20.3%.

[0035] S1. Take 200g of sodium sulfate decahydrate, 40g of sodium chloride, 76g of ammonium bromide, and 13g of borax, and add them to the reaction kettle in sequence, mix and stir evenly, and control the mixing temperature at 80°C.

[0036] S2. Add 17.4g of superabsorbent resin and 88.3g of deionized water in sequence in the beaker. After the superabsorbent resin is fully absorbed, add it to the reaction kettle, mix with the raw materials in the reaction kettle and stir for 50 minutes.

[0037] S3, turn off the stirring, and cool to room temperature to obtain a uniform paste, which is the phase change cold storage material 3.

[0038] Perform performance tests on phase change cold storage materials 3, such as ...

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Abstract

The invention discloses a phase change cold storage material. The phase change cold storage material is prepared from the following raw materials in percentage by mass: 45-70% of sodium sulfate decahydrate, 3-10% of sodium chloride, 8-18% of ammonium bromide, 2-3% of borax, 3-4% of super absorbent resin and the balance of deionized water. The invention also provides a preparation method of the phase change cold storage material, which comprises the following steps: S1, sequentially adding sodium sulfate decahydrate, sodium chloride, ammonium bromide and borax into a reaction kettle, mixing and uniformly stirring, and controlling the mixing temperature at 50-80 DEG C; s2, sequentially adding super absorbent resin and deionized water into a beaker, adding the super absorbent resin into the reaction kettle after the super absorbent resin fully adsorbs, and mixing and stirring the super absorbent resin and the raw materials in the reaction kettle; and S3, stopping stirring, and cooling to room temperature to obtain uniform paste, namely the phase change cold storage material. The phase change cold storage material provided by the invention has the advantages of high latent heat value, long cycle life, difficulty in layering and caking, small supercooling degree, easily available raw materials, safety and no toxicity.

Description

technical field [0001] The invention relates to the technical field of phase change cold storage, in particular to a phase change cold storage material and a preparation method thereof. Background technique [0002] Phase change cold storage technology is widely used in solar energy utilization, civil and industrial refrigeration, as well as process industry energy saving and regional energy co-supply systems. Especially for air conditioning systems (HVAC), the phase change temperature is in the range of 8°C to 11°C The advanced phase change cold storage technology can replace some of the existing water cold storage and ice cold storage technologies, and greatly improve the cycle coefficient of performance (COP) of the screw refrigeration unit while making full use of peak and valley electricity. Inorganic phase change cold storage materials are the most promising materials for large-capacity cold storage because of their low price and easy availability of raw materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/066Y02E60/14
Inventor 不公告发明人
Owner 北京中凯新科科技有限公司