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Phase-change constant-temperature material

A technology of constant temperature and raw materials for phase change, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of irregular search for nucleating agents, etc., and achieve the effect of easy promotion, low price, and reversible phase change process

Inactive Publication Date: 2012-06-27
肖吕明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Supercooling and phase separation are usually solved by adding nucleating agents and thickeners, but the search for nucleating agents is not regular and often depends on experience and luck

Method used

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Effect test

Embodiment 1

[0014] 28% CaCl by mass 2 ·6H 2 O, 45% NaSO 4 10H 2 O, 5% Na 2 B 4 o 7 10H 2 O, 14% water, 8% cellulose. The preparation method is as follows:

[0015] (1) Place two containers separately, weigh the raw materials in proportion, and use 70°C hot water to separate CaCl 2 ·6H 2 O and Na 2 B 4 o 7 10H 2 O dissolved and stirred, the NaSO 4 10H 2 O is ground and dissolved;

[0016] (2) NaSO 4 10H 2 Pour the O solution into a heating furnace, heat to 100°C, and maintain the container temperature at 100°C, add cellulose, and stir thoroughly;

[0017] (3) After about 10 minutes of heating, the CaCl 2 ·6H 2 O and Na 2 B 4 o 7 10H 2 The O mixed solution was also poured into the heating furnace and stirred for 10 minutes, and the whole heating process was carried out at a temperature of 100°C.

[0018] The phase change material prepared by this method has a phase change temperature of 29 degrees Celsius and a latent heat of 223KJ / KG. See attached picture 1.

Embodiment 2

[0020] 34% CaCl by mass 2 ·6H 2 O, 40% NaSO 4 10H 2 O, 8% Na 2 B 4 o 7 10H 2 O, 10% water, 8% cellulose. The preparation method is as follows:

[0021] (1) Place two containers separately, weigh the raw materials in proportion, and use 70°C hot water to separate CaCl 2 ·6H 2 O and Na 2 B 4 o 7 10H 2 O dissolved and stirred, the NaSO 4 10H 2 O is ground and dissolved;

[0022] (2) NaSO 4 10H 2 Pour the O solution into a heating furnace, heat to 100°C, and maintain the container temperature at 100°C, add cellulose, and stir thoroughly;

[0023] (3) After about 10 minutes of heating, the CaCl 2 ·6H 2 O and Na 2 B 4 o 7 10H 2 The O mixed solution was also poured into the heating furnace and stirred for 10 minutes, and the whole heating process was carried out at a temperature of 100°C.

[0024] The phase change material prepared by this method has a phase change temperature of 27°C and a latent heat of 251KJ / KG. See attached picture 1.

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Abstract

The invention discloses a phase-change constant-temperature material which contains the following components in the mass ratio: 28-34 percent of CaCl2.6H2O, 40-45 percent of NaSO4.10H2O, 5 or 8 percent of Na2B4O7.10H2O, 10-27 percent of water and 8 percent of cellulose. The phase-change temperature of the phase-change material provided by the invention is 26-29 DEG C, the latent heat of phase change is 198-257KJ / KG, the phase-change process is reversible, the recyclable use frequency is more than 2000 times, all the raw materials are produced in a large scale, and the phase-change material has low price, no toxicity, no corrosion and easy popularization. The phase-change material is in a white snow floc shape at normal temperature, has a certain elasticity, is very easy for plasticity and is convenient for development and utilization in various energy-storage fields.

Description

technical field [0001] The invention relates to a phase change material and a preparation method thereof, in particular to a phase change material with a phase change temperature of about 27°C. Background technique [0002] The purpose of temperature control can be achieved through the characteristic that the temperature of the phase change material is approximately constant when the phase changes. This kind of material is widely used in building energy saving, modern agricultural greenhouse, solar energy utilization, refrigeration and transportation of biomedical products and food, physical medicine (hyperthermia), heat dissipation of electronic equipment, cooling (warm) clothing for athletes, special temperature control clothing, aerospace Technology, military infrared camouflage, power peak shaving applications, industrial waste heat storage and utilization, and many other fields. [0003] Among many phase change materials, inorganic crystalline hydrated salts have the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/02
Inventor 肖吕明
Owner 肖吕明
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