CN103484065A

CN103484065A - Inorganic phase change material with phase change temperature of 5 DEG C

Info

Publication number: CN103484065A
Application number: CN201210195593.2A
Authority: CN
Inventors: 杨玉生
Original assignee: New Forms Of Energy Science And Technology Ltd Of China And Sweden Gloomy (tianjin)
Current assignee: New Forms Of Energy Science And Technology Ltd Of China And Sweden Gloomy (tianjin)
Priority date: 2012-06-14
Filing date: 2012-06-14
Publication date: 2014-01-01

Abstract

The invention discloses an inorganic phase change constant temperature material (PCM-5) with a phase change temperature of 5 DEG C, and relates to an inorganic phase change constant temperature material, which contains 17% by mass of calcium chloride hexahydrate, 2.5% by mass of strontium chloride hexahydrate, 2.5% by mass of silica, 2% by mass of sodium formate, 1% by mass of acrylic acid, 0.5% by mass of a diacrylic glycolester cross-linking agent, and 74.5% by mass of water. The phase change material has the following characteristics that: a phase change temperature is 5 DEG C, undercooling is 0.5 DEG C, phase change latent heat is 154 KJ/KG, a phase change process is reversible, the phase change material can be recycled more than 10000 times, the raw materials have characteristics of large-scale production, no toxicity, no corrosion and easy promotion, and the phase change material is a colorless and transparent liquid at a room temperature so as to be easily developed and utilized in various energy storage fields.

Description

The inorganic phase-changing material that a kind of transformation temperature is 5 ℃

Technical field:

The present invention relates to a kind of inorganic-phase variable constant-temp material and preparation method thereof, a kind of transformation temperature of special design is at the phase change material of 5 ℃.

Background technology:

In numerous industries such as food, chemical industry, low temperature logistics, medical use, beer, refrigeration, generally utilize refrigerator to environment or store the specified temp needed and carry out constant temperature.When refrigerator has a power failure, can't maintain for a long time the specified temp of environment or hoarding demand, thereby temperature recovery is fast, the article storage time is short, the storage article are perishable.In the refrigeration system without phase-change constant-temperature material, when isoperibol is provided, refrigerator work starts frequent, thereby has reduced its work-ing life, and current consumption is many.

Phase-change constant-temperature material is the latent heat cold-storage, is the functional materials of storage cold in the phase-change constant-temperature system, in the low power consumption phase at night, utilize material latent heat that cold is stored in phase-change constant-temperature material, during peak of power consumption, cold is discharged by day, meet environment or storage needs.Such refrigeration system, the most of the time operates in low power consumption at the night peak phase, and by day peak times of power consumption only have utility appliance operation, thereby realize that electrical network " avoids the peak hour with cold, peak load shifting ", be conducive to alleviate energy both sides disparities between supply and demand.

At present both at home and abroad also fewer to the research of the low temperature phase change cold storage material below 0 ℃, but at food, chemical industry, low temperature logistics, medical use, beer, spill, numerous industries such as refrigeration, constant-temp material is had to huge demand.Therefore study the low temperature phase change constant-temp material, developing transformation temperature is 5 ℃, and latent heat of phase change is large, and condensate depression is little, and nothing is separated, novel, the low temperature phase change constant-temp material of stable performance, seems particularly important.

Phase change material stable performance provided by the present invention, transformation temperature is at 5 ℃, and condensate depression is 0.5 ℃, and latent heat of phase change is 154KJ/KG, and phase transition process is reversible, and the number of times that can be recycled is that more than 10000 times, starting material are scale production, nontoxic corrosion-free, is easy to promote.This phase change material is colourless transparent liquid when normal temperature, is convenient to each energy storage field and develops.

Summary of the invention:

The object of the present invention is to provide a kind of synthetic by the inorganic salts material, stable performance, latent heat of phase change is large, nontoxic corrosion-free, easily the good inorganic-phase variable constant-temp material of plasticity.

Inorganic-phase variable constant-temp material of the present invention is comprised of following by weight percentage:

Concrete preparation method:

1, the sodium formiate that is 2% by total configuration amount in the configuration ware under 25～35 ℃ of conditions is that 10% water is made into the aqueous solution with total configuration amount;

2, the six water strontium chlorides that are 2.5% by total configuration amount join in the aqueous solution of step 1, mix, and make mixing solutions;

3, in the mixing solutions of step 2, add total configuration to be set to 2.5% silicon-dioxide, then add up the water that allocation ratio is 25%, stir, heat 1 hour, temperature remains on 40 ℃ of left and right allows it fully react.

4, the vinylformic acid that is 1% by total configuration amount adds that to be put into total configuration amount be in 10% water, mixes, and makes mixing solutions;

5, be 0.5% diacrylic glycolester linking agent to total configuration amount in the mixing solutions of step 4, stir;

6, solution in the solution of step 3 and step 5 is stirred.

7, be 17% calcium chloride hexahydrate to adding total configuration amount in the mixing solutions of step 6, react 0.5～1.5 hour under 35～45 ℃, condition of normal pressure.

8, by adding the water that the total allocation ratio of residue is 29.5% in the macromolecular material of step 7 preparation, stir, place and get final product in 10～15 minutes.

9, final Chemical Composition " inorganic-phase variable liquid polymer material "

Inorganic phase-changing material product specification of the present invention is

Density:	1.3g/cm ³(25℃)
		Transformation temperature:	5℃
Latent heat:	154kJ/kg
		Thermal conductivity:	0.55W/m.k
Condensate depression:	0.5℃
		Access times	10000 this time more than

[0022]the relation of the temperature and time of inorganic phase-changing material regelation of the present invention

Regelation is to make the condensing again in order to start another energy absorption one release cycle of phase change material.

This inorganic-phase variable constant-temp material starts regelation in the time of 5 ℃, and be 10 hours time of coagulation, along with the reduction of temperature, time of coagulation is corresponding shortening also, and in the time of 2 ℃, be 4 hours time of coagulation, and in the time of 1 ℃, be 2 hours time of coagulation, in the time of-3 ℃, be 1.5 hours time of coagulation, and in the time of-7 ℃, be 1 hour time of coagulation.

Result shows: the change of the time of regelation along with the temperature difference increases sharply greatly.

Inorganic phase-changing material of the present invention is controlled the relation of temperature and time

When envrionment temperature is 25 ℃, phase change material is controlled temperature capability and the time is inversely proportional to, increase along with the time, the cold that phase change material discharges starts to reduce, this phase change material starts released cold quantity in the time of 5 ℃, and can to keep temperature-time be 6 hours, then just can heat up gradually, until phase change material melts fully, with envrionment temperature, equate.

Accompanying drawing and accompanying drawing explanation

Preparation technology's schema that Fig. 1 is a kind of transformation temperature of the present invention inorganic phase-changing material that is 5 ℃

The calcium chloride hexahydrate that A is 17%

The six water strontium chlorides that B is 2.5%

The silicon-dioxide that C is 2.5%

The sodium formiate that D is 2%

The vinylformic acid that E is 1%

The diacrylic glycolester linking agent that F is 0.5%

The water that G is 10%

The water that H is 25%

The water that I is 10%

The water that J is 29.5%

K is the aqueous solution that step 1 produces

L is the mixing solutions that step 2 produces

M is the mixing solutions that step 3 produces

N is the mixing solutions that step 4 produces

0 mixing solutions for the step 5 generation

P is the mixing solutions that step 6 produces

Q is the mixing solutions that step 7 produces

R is phase-change constant-temperature material of the present invention

1 mixes under 25～35 ℃ of conditions

2 stirring heating 1 hour, temperature remains on 40 ℃ of left and right

3 react 0.5～1.5 hour under 35～45 ℃, condition of normal pressure

4 stir, and place 10～15 minutes

Fig. 2 is temperature-time chart that inorganic phase-changing material that a kind of transformation temperature of the present invention is 5 ℃ melts again

This inorganic-phase variable constant-temp material starts regelation in the time of 5 ℃, and be 10 hours time of coagulation, along with the reduction of temperature, time of coagulation is corresponding shortening also, and in the time of 2 ℃, be 4 hours time of coagulation, and in the time of-1 ℃, be 2 hours time of coagulation, in the time of-3 ℃, be 1.5 hours time of coagulation, and in the time of-7 ℃, be 1 hour time of coagulation.

Fig. 3 is that the inorganic phase-changing material that a kind of transformation temperature of the present invention is 5 ℃ is controlled temperature-timing relationship

Article three, curve is respectively: outdoor environment temperature (25 ℃), variation and the variation of temperature while not applying this inorganic-phase variable constant-temp material of temperature while applying this inorganic-phase variable constant-temp material.Phase change material is controlled temperature capability and the time is inversely proportional to, increase along with the time, the cold that phase change material discharges starts to reduce, this phase change material starts released cold quantity in the time of 5 ℃, and can to keep temperature-time be 6 hours, then just can heat up gradually, until phase change material melts fully, equate with envrionment temperature.

Claims

1. the present invention relates to a kind of synthetic by the inorganic salts material, stable performance, latent heat of phase change is large, nontoxic corrosion-free, easily the good inorganic-phase variable constant-temp material of plasticity.

2. according to inorganic-phase variable constant-temp material claimed in claim 1, it is characterized in that: the material used is all inorganics.

3. inorganic-phase variable constant-temp material according to claim 1 and 2 is characterized in that: transformation temperature is at 5 ℃, and condensate depression is 0.5 ℃, and latent heat of phase change is 154KJ/KG, and phase transition process is reversible, and the number of times that can be recycled is more than 10000 times.