CN102827575A

CN102827575A - Inorganic phase-change material (PCM-32) with phase-change temperature of 32 DEG C

Info

Publication number: CN102827575A
Application number: CN2011101635338A
Authority: CN
Inventors: 杨玉生
Original assignee: BEIJING ZRS NEW ENERGY TECHNOLOGY CO LTD
Current assignee: BEIJING ZRS NEW ENERGY TECHNOLOGY CO LTD
Priority date: 2011-06-17
Filing date: 2011-06-17
Publication date: 2012-12-19

Abstract

The invention relates to an inorganic phase-change material (PCM-32) with a phase-change temperature of 32 DEG C. The invention relates to an inorganic phase-change thermostatic material comprising the components of, by mass: 34% of calcium chloride hexahydrate, 12% of strontium chloride hexahydrate, 7.5% of silica, 7.5% of acrylic acid, 6.5% of sodium chloride, 3.5% of sodium carboxymethyl cellulose, and 29% of water. The phase-change temperature of the phase-change material provided by the invention is 32 DEG C. A supercooling degree of the material is 0.5 DEG C. Phase-change latent heat of the material is 232KJ/KG. A phase-change process is reversible, and the material can be cyclically used for more than 10000 times. The raw materials of the material are all produced in batches, and cause no toxicity or corrosion. The material is easy to popularize. Under normal temperature, the phase-change material is colorless transparent snowflake-shaped crystalline. The material is suitable to be developed and utilized by various energy-storage fields.

Description

A kind of transformation temperature is 32 ℃ a inorganic phase-changing material (PCM-32)

Technical field:

The present invention relates to a kind of inorganic-phase variable constant-temp material and preparation method thereof, design a kind of transformation temperature especially at 32 ℃ phase change material.

Background technology:

In numerous industries such as food, chemical industry, logistics, medical use, communication information machine room, workshop, military affairs, generally utilize refrigerator to come the specified temp of environment or storage needs is carried out constant temperature.When refrigerator has a power failure, thus temperature recovery fast, can't keep best envrionment temperature.In the refrigeration system of no phase-change constant-temperature material, when isoperibol was provided, refrigerator work started 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.Utilize material latent heat that cold is stored in the phase-change constant-temperature material in the low power consumption phase at night; Absorb natural cold quantity when discharging or utilizing temperature low the cold during peak of power consumption by day, satisfy environment or live required temperature thereby cold discharged when temperature is high.Such refrigeration system; Most of the time absorbs natural cold quantity when operating in the low power consumption peak phase at night or utilizing nighttime temperature low; And high temperature peak times of power consumption have only the utility appliance operation by day; Thereby the realization electrical network " is avoided the peak hour with cold, peak load shifting ", helps alleviating energy both sides disparities between supply and demand.

Also fewer to the research of phase-change material for cold storage both at home and abroad at present, but, constant-temp material is had huge demand in numerous industries such as food, chemical industry, low temperature logistics, medical use, communication information machine room, workshop, military affairs.Therefore study phase-change constant-temperature material, developing transformation temperature is 32 ℃, and latent heat of phase change is big, and condensate depression is little, and nothing is separated, novel, the phase-change constant-temperature material of stable performance, seems particularly important.

Phase change material stable performance provided by the present invention, transformation temperature are at 32 ℃, and condensate depression is 0.5 ℃; Latent heat of phase change is 232KJ/KG, and phase transition process is reversible, and the number of times that can be recycled is more than 10000 times; Starting material are scale prodn, and nontoxic nothing corrosion is easy to promote.This phase change material is the crystallization flakes when normal temperature, is convenient to each energy storage field development and use.

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 big, nontoxic nothing corrosion is prone to the good inorganic-phase variable constant-temp material of plasticity.

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

Concrete preparation method:

1, in the configuration ware, be that 7.5% vinylformic acid is that 9% water is made into the aqueous solution with total configuration amount under 45～80 ℃ of conditions with total configuration amount;

2, be that 12% six water strontium chlorides join in the aqueous solution of step 1 with total configuration amount, mix, process mixing solutions;

3, in the mixing solutions of step 2, adding total configuration amount is 7.5% silicon-dioxide, and the totalling allocation ratio is 5% water again, stirs, and heats 1 hour, and temperature remains on about 60 ℃ and lets it fully react.

4, with total configuration amount be 6.5% sodium-chlor to be put into total configuration amount be in 5% water, mix, process mixing solutions;

5, total configuration amount is 3.5% sodium cellulose glycolate in the mixing solutions of step 4, stirs;

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

7, in the mixing solutions of step 6, adding total configuration amount is 34% calcium chloride hexahydrate, under 60～70 ℃, condition of normal pressure, reacts 0.5～1.5 hour.

8, be 10% water with adding the total allocation ratio of residue in the macromolecular material of step 7 preparation, stir, place and got final product in 10～15 minutes.

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

Accompanying drawing one preparation technology's schema of the present invention

A is 34% calcium chloride hexahydrate

B is 12% six water strontium chlorides

C is 7.5% silicon-dioxide

D is 7.5% vinylformic acid

E is 6.5% sodium-chlor

F is 3.5% sodium cellulose glycolate

G is 9% water

H is 5% water

I is 5% water

J is 10% water

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

O is the mixing solutions that step 5 produces

P is the mixing solutions that step 6 produces

Q is the mixing solutions that step 7 produces

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

1 mixes under 45～80 ℃ of conditions

2 stirring heating 1 hour, temperature remains on about 60 ℃

3 reacted 0.5～1.5 hour under 60～70 ℃, condition of normal pressure

4 stir, and place 10～15 minutes

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

Density:	1.40g/cm ³(25℃)
		Transformation temperature:	32℃
Latent heat:	232kJ/kg
		Thermal conductivity:	0.55W/m.k
Condensate depression:	0.5℃
		Access times	10000 this time more than

The relation of the temperature and time of inorganic phase-changing material regelation of the present invention

Regelation is to make the condensing again so that begin another energy absorption-release cycle of phase change material.

This inorganic-phase variable constant-temp material begins regelation in the time of 31.5 ℃; Be 6.5 hours time of coagulation, along with the reduction of temperature, and also corresponding shortening time of coagulation; Be 4 hours time of coagulation in the time of 24 ℃; Be 2.5 hours time of coagulation in the time of 17 ℃, and be 2 hours time of coagulation in the time of 13 ℃, and be 1 hour time of coagulation in the time of 10 ℃.

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

Accompanying drawing two is the temperature-timing relationship of inorganic phase-changing material regelation of the present invention

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

When envrionment temperature was 40 ℃, phase change material controlled temperature ability and time were inversely proportional to, along with the increase of time; The cold that phase change material discharges begins to reduce; This phase change material begins released cold quantity in the time of 32 ℃, and can to keep temperature-time be 16 hours, just can heat up gradually then; Melt fully until phase change material, then equate with envrionment temperature.

Accompanying drawing three is a phase change material controlled temperature time curve.

Claims

A kind of transformation temperature is 32 ℃ a inorganic phase-changing material (PCM-32)

1. the present invention relates to a kind of synthetic by the inorganic salts material, stable performance, latent heat of phase change is big, nontoxic nothing corrosion is prone to the good inorganic-phase variable constant-temp material of plasticity.

Inorganic-phase variable constant-temp material of the present invention, form by following by weight percentage:
2. it is characterized in that according to the described inorganic-phase variable constant-temp material of claim 1: employed material all is an inorganics.
3. inorganic-phase variable constant-temp material according to claim 1 and 2 is characterized in that: transformation temperature is at 32 ℃, and condensate depression is 0.5 ℃, and latent heat of phase change is 232KJ/KG, and phase transition process is reversible, and the number of times that can be recycled is more than 10000 times.