CN102827580A

CN102827580A - Inorganic phase-change material (PCM-37) with phase-change temperature of 37 DEG C

Info

Publication number: CN102827580A
Application number: CN2011101635569A
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-37) with phase-change temperature of 37 DEG C, and relates to an inorganic phase-change constant-temperature material which contains the components by mass: 26% of calcium chloride hexahydrate, 21% of strontium chloride hexahydrate, 8% of maleic anhydride, 7.5% of sodium formate, 8% of sodium chloride, 2.5% of potassium persulfate and 27% of water. The phase-change material provided by the invention has the advantages that the phase-change temperature is 37 DEG C, the supercooling degree is 0.5 DEG C, the phase-change latent heat is 216kJ/kg, the phase-change process is reversible, the circulating use times is more than 10000, and the raw materials are produced on a large scale and are nontoxic or noncorrosive, thereby being easy for popularization. The phase-change material is colorless transparent snow-shaped crystal at normal temperature, and is convenient for development and utilization in various energy storage fields.

Description

A kind of transformation temperature is 37 ℃ a inorganic phase-changing material (PCM-37)

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 37 ℃ phase change material.

Background technology:

In numerous industries such as food heat-insulation, electric furnace, electric heater, chemical industry, logistics, medical use, military affairs, electronics, generally utilize heating unit to come the specified temp of environment or storage needs is carried out constant temperature.When heating unit has a power failure, thus temperature descend fast, can't keep best envrionment temperature.In the constant temperature system of no phase-change constant-temperature material, when isoperibol was provided, heating unit work started frequent, thereby has reduced its work-ing life, and current consumption is many.

Phase-change constant-temperature material is the latent heat accumulator material, is the functional materials of stored energy in the phase-change constant-temperature system.The low power consumption phase at night utilize " material latent heat " with thermal energy storage in phase-change constant-temperature material, heat release is come out during peak of power consumption by day, thereby heat release is come out to satisfy environment or life, the required temperature of production when temperature is low.Such heating, the most of the time operates in the low power consumption peak phase at night, and by day peak times of power consumption have only utility appliance operation, thereby realize that electrical network " avoids the peak hour with cold, peak load shifting ", help alleviating energy both sides disparities between supply and demand.

In the constant temperature system of inorganic-phase variable constant-temp material, when isoperibol was provided, heating unit work started frequent, thereby has reduced its work-ing life, and current consumption is many.The envrionment temperature cataclysm can't be kept required temperature after having a power failure, and affects for production, life.In adding in the heating of use inorganic-phase variable constant-temp material; Utilize inorganic-phase variable constant-temp material store heat, after the heater stop operation, inorganic-phase variable constant-temp material release of heat is kept required envrionment temperature; Thereby reduce the number of times of the startup of heating, prolong service life of equipment.When having a power failure or in the passive heat-insulation system, still can keep required envrionment temperature.

Also fewer to the research of phase change heat storage material both at home and abroad at present, but, lagging material is had huge demand in numerous industries such as food heat-insulation, electric furnace, electric heater, chemical industry, logistics, medical use, military affairs, electronics.Therefore study the phase-change constant-temperature lagging material, developing transformation temperature is 37 ℃, 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 37 ℃, and condensate depression is 0.5 ℃; Latent heat of phase change is 216KJ/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% sodium formiate is that 10% water is made into the aqueous solution with total configuration amount under 45～80 ℃ of conditions with total configuration amount;

2, be that 21% 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 8% maleic anhydride, 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 8% sodium-chlor to be put into total configuration amount be in 5% water, mix, process mixing solutions;

5, total configuration amount is 2.5% Potassium Persulphate 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 26% calcium chloride hexahydrate, under 60～70 ℃, condition of normal pressure, reacts 0.5～1.5 hour.

8, be 7% 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 26% calcium chloride hexahydrate

B is 21% six water strontium chlorides

C is 8% maleic anhydride

D is 7.5% sodium formiate

E is 8% sodium-chlor

F is 2.5% hydroxyl Potassium Persulphate

G is 10% water

H is 5% water

I is 5% water

J is 7% 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:	1.36g/cm ³(25℃)
		Transformation temperature:	37℃
Latent heat:	216kJ/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 that inorganic phase-changing material of the present invention melts again

Again melting is to make the thawing again of phase change material so that begin another energy absorption-release cycle.

This inorganic-phase variable constant-temp material begins to melt heat absorption being higher than 37 ℃, and in the time of 37.5 ℃, the thawing time is 4.5 hours; Rising along with temperature; Also corresponding shortening of thawing time, the thawing time is 3 hours in the time of 40 ℃, be 2 hours time of coagulation in the time of 43 ℃; Be 1.5 hours time of coagulation in the time of 45 ℃, and be 1 hour time of coagulation in the time of 48 ℃.

The result shows: melt the change greatly and rapidly minimizing of the time of heat absorption along with temperature again.

The relation of the temperature and time that accompanying drawing two melts for inorganic phase-changing material of the present invention again

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

Phase change material controlled temperature ability and time are inversely proportional to; Increase along with the time; The heat that phase change material discharges begins to reduce, and envrionment temperature begins release of heat when being lower than 37 ℃, and can to keep temperature-time be 12 hours; Just can heat up gradually then, finish until the phase change material heat release of condensing fully.

Accompanying drawing three is inorganic phase-changing material controlled temperature-timing relationship of 37 ℃ for a kind of transformation temperature of the present invention.

Claims

A kind of transformation temperature is 37 ℃ a inorganic phase-changing material (PCM-37)

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 37 ℃, and condensate depression is 0.5 ℃, and latent heat of phase change is 216KJ/KG, and phase transition process is reversible, and the number of times that can be recycled is more than 10000 times.