CN108251074A - A kind of 89 degree of phase-changing energy storage materials - Google Patents

A kind of 89 degree of phase-changing energy storage materials Download PDF

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Publication number
CN108251074A
CN108251074A CN201810203419.5A CN201810203419A CN108251074A CN 108251074 A CN108251074 A CN 108251074A CN 201810203419 A CN201810203419 A CN 201810203419A CN 108251074 A CN108251074 A CN 108251074A
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phase
energy storage
degree
changing energy
storage materials
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CN108251074B (en
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张文亮
胡迎辉
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Shanghai Today Energy Engineering Co Ltd
Beijing Today Energy Science And Technology Development Co Ltd
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Shanghai Today Energy Engineering Co Ltd
Beijing Today Energy Science And Technology Development Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02Materials undergoing a change of physical state when used
    • C09K5/06Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
    • C09K5/063Materials absorbing or liberating heat during crystallisation; Heat storage materials
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/02Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14Thermal energy storage

Abstract

The present invention relates to the technical fields of energy storage material, and in particular to a kind of 89 degree of phase-changing energy storage materials and preparation method and application.The material is made of the component of following parts by weight:100 parts of magnesium nitrate hexahydrate, 0.5~5 part of graphite, 0.5~10 part of thickener, 0.1~2 part of corrosion inhibiter, 0.1~2 part of surfactant, 0.1~1 part of colorant.The phase-changing energy storage material can solve the problems, such as material easily in the condensation of heat conduction pipe surface, corrosivity is strong, poor thermal conductivity, easy to leak are dangerous.The material phase transformation temperature is matched with heating network operating temperature, can apply to the Latent Heat Storage Exchanger in co-generation unit.

Description

A kind of 89 degree of phase-changing energy storage materials
Technical field
The present invention relates to the technical field of energy storage material, more specifically to a kind of 89 degree of phase-changing energy storage materials and its Preparation method and application.
Background technology
The energy is the basis of human survival and development, and wherein electric energy and thermal energy are even more the energy shape that human society utilizes extensively One of formula.At present, co-generation unit externally can not only export electric energy but also export thermal energy, can ensure exhausting and life simultaneously The demand of electricity consumption heat in production.But due to being usually staggered with heat and peak of power consumption, when the heat of co-generation unit produces When going out to be more than real-time heat demand, it is necessary to carry out energy storage to reduce the waste of the energy.The development of energy storage technology is be unable to do without efficiently The exploitation of energy storage material, energy storage material can be divided into two major class.The first kind is chemical heat-accumulating material, utilizes reaction or heat of solution Heat is stored, although storage density is bigger, heat storage capacity is limited, and pollutes environment.Second class is physics energy storage material, It is divided into sensible heat formula and phase-change type.Wherein phase-change type is to be absorbed during material phase transformation or release heat, so as to fulfill heat Storage and release, this material are thus referred to as phase-changing energy storage material PCM (phase change materials).
Phase-changing energy storage material has the property that:When temperature raising reaches phase transition temperature, the physics shape of phase-changing energy storage material State changes, and the temperature of phase-changing energy storage material itself almost remains unchanged before phase transformation completion, during this, great Liang Xiang Heating is absorbed or released out.So as in the phase transformation stage, produce a wider temperature platform, this platform goes out It is existing so that we can obtain a metastable constant temperature time.The energy storage density of phase-change accumulation energy is high, and heat mainly divides Cloth is near phase transition temperature, therefore practical utilize is easier.Phase-changing energy storage material possesses numerous value volume and range of product.It is general and Phase-changing energy storage material, according to the difference of phase-changing energy storage material phase transition temperature, can be divided into low-temperature phase-change energy-storing material (15- by speech 90 DEG C), medium temperature phase-changing energy storage material (90-550 DEG C) and high-temperature phase-change energy storage material (550 DEG C of >);According to chemical composition not Together, phase-changing energy storage material is divided into organic and Inorganic phase change energy storage material.
Specifically, inorganic molten salt is as Inorganic phase change energy storage material, it is notable the advantages of be:1. since inorganic salts are Ionic crystal body, for solid-state or liquid, thermal conductivity is good, when being converted into liquid, due to a large amount of free ions Presence, thermal conductivity is more preferable, and (heat conduction of substance is similar with conductivity principle, is both needed to carry out reality by the vibration of lattice and the movement of electronics It is existing);It is easy to get 2. type is various, widely distributed, cheap;3. since polarization stronger between partial moisture and metal ion is made It is destroyed in fusion process, needs to absorb larger heat, latent heat of phase change is big.Inorganic molten salt phase-changing energy storage material due to Latent heat of phase change is larger in its phase transition process, phase transition temperature is constant, can store a large amount of heat, while can realize temperature control, always by To the concern of researcher.
In recent years, it has been developed that a variety of inorganic molten salt phase-changing energy storage materials, and apply to numerous areas such as heat Energy storage is carried out in cogeneration system.Specifically, the phase-change energy storage device in existing co-generation unit includes an energy-storage box, storage Phase-changing energy storage material can be placed, and heat pipe is passed through energy-storage box from inlet extension, and is arranged in energy-storage box inside turn in case, It is drawn again from exit from energy-storage box.Hot Bottomhole pressure heat-conducting medium.For example, the high temperature heat conducting medium from co-generation unit Heat exchange occurs along the phase-changing energy storage material that heat pipe is flowed into from inlet in energy-storage box, with energy-storage box, discharges heat, Ran Houcong It flows out in exit.
But the existing inorganic molten salt phase-changing energy storage material used still has following defect:First, inorganic-phase variable stores up Energy material degree of supercooling is big, is also easy to produce phase separation;Second is that phase-changing energy storage material easily heat conduction pipe surface condense, influence from heat pipe to The heat transfer of energy-storage box;Third, phase-changing energy storage material is strong to thermal conductive pipe corrosivity, and need to add in the nucleation containing chlorion Agent easily corrodes the stainless steel as heat pipe;In addition, also there is easily leakage, phase transition temperature and confession in phase-changing energy storage material The required ideal temperature of heat has the problem of certain temperature difference, and these problems are all urgently to be resolved hurrily and improve.
Invention content
The shortcomings that in order to overcome the prior art and deficiency, present invention aims at provide a kind of 89 degree of phase-changing energy storage materials and Preparation method and application.The phase-changing energy storage material can solve material easily in the condensation of heat conduction pipe surface, corrosivity is strong, thermal conductivity Difference, the technical issues of easy to leak is dangerous.The phase-changing energy storage material phase transition temperature is matched with heating network operating temperature, can apply to heat Latent Heat Storage Exchanger in cogeneration system.
Purpose to realize the present invention, the present invention use following technical scheme:
A kind of 89 degree of phase-changing energy storage materials, the material are made of the component of following parts by weight:Magnesium nitrate hexahydrate 100 Part, 0.5~5 part of graphite, 0.5~10 part of thickener, 0.1~2 part of corrosion inhibiter, 0.1~2 part of surfactant, colorant 0.1~ 1 part.
Preferably, the thickener is sodium carboxymethylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose, Amorphophallus rivieri glucomannan At least one of glycan.
Preferably, the corrosion inhibiter is at least one of tallow amine, cetylamine, octadecylamine.
Preferably, the surfactant is neopelex, in sodium taurocholate, cetyl trimethylammonium bromide At least one.
Preferably, the colorant is amaranth, famille rose, erythrosine, newly red, lemon yellow, sunset yellow, indigo, brilliant blue At least one of.
Further, it is preferable that the parts by weight of the graphite are 1~2.5 part.
Further, it is preferable that the parts by weight of the thickener are 2~5 parts.
Further, it is preferable that the parts by weight of the corrosion inhibiter are 0.5~1 part.
Further, it is preferable that the parts by weight of the surfactant are 0.5~1 part.
Further, it is preferable that the parts by weight of the colorant are 0.5 part.
Further to realize the object of the invention, it is preferable that the weight ratio of corrosion inhibiter and surfactant is 1 in the material ∶1。
The present invention also provides a kind of preparation methods of 89 degree of phase-changing energy storage materials, include the following steps:
(1) stainless steel sealing container will be put into after magnesium nitrate hexahydrate pulverization process, be placed in KDM types control-temperature electric heating set and adds Then heat adds in corrosion inhibiter while stirring to 90~95 DEG C, until being melt into molten liquid completely;
(2) surfactant is added in molten liquid, ultrasonic disperse handles 30~40min, obtains dispersion liquid;
(3) graphite, thickener and colorant are added in dispersion liquid, postcooling is mixed evenly to get phase-change accumulation energy Material.
Further, the present invention also provides a kind of application method of 89 degree of phase-changing energy storage materials, include the following steps:
(1) 89 degree of phase-changing energy storage materials are prepared according to the above method, it is spare;
(2) stainless steel pipe inner wall is handled with metal conditioner, removes the dirt on pipe inner wall, the metal watch Surface treatment agent is acetone or ethyl alcohol;
(3) conduit, which is placed in heat source, is maintained under 90~95 DEG C of temperature condition, and 89 degree of phase-changing energy storage materials are added Heat is injected in conduit, sealing recession is except heat source, cooling while hot to molten condition.
Further, the present invention also provides the applications of 89 degree of phase-changing energy storage materials, specifically, 89 degree of phase-change accumulation energies Material is applied to the Latent Heat Storage Exchanger in co-generation unit.
Relative to the prior art, the invention has the advantages that:
(1) 89 degree of phase-changing energy storage materials of the invention select six water and magnesium nitrate as matrix phase-change material, phase alternating temperature Degree is near 89 DEG C, within the temperature change section in co-generation unit application environment, is particularly suitable for applications in phase transformation storage Energy heat exchanger, phase transition temperature are matched with heating network operating temperature;By adding in graphite, can not have to add in corrosivity it is strong contain chlorine Nucleating agent while increasing material thermal conductivity and keeps original phase-change thermal storage performance.
(2) tallow amine, cetylamine and octadecylamine etc. are referred to as the amine of " film amine ", belong to adsorbed film type corrosion inhibiter. As organic inhibitor, they have the amino group of polar hydrophilic base, can be adsorbed on metal surface, form one layer of densification Hydrophobic film, protect metal surface not by aqueous corrosion.Adding in surfactant then can further help corrosion inhibiter to be formed well Inhibition hydrophobic film.
(3) since corrosion inhibiter is in stainless steel pipe surface formation protective film, and then phase-changing energy storage material is inhibited in stainless steel The phenomenon that pipe surface condenses, improves the conducting power of heat inside and outside pipeline, and cold cycling stability is good, convenient for long-term extensive It uses.
(4) since surfactant acts as dispersant to material is added to, the graphite surface in material can be made to be easy to moisten It is wet, so as to which graphite be made easily to be distributed in medium, further improve the capacity of heat transmission of material.
(5) it adds in colorant to colour phase-changing energy storage material, can find, improve in time when being leaked convenient for material Safety during materials'use.
Specific embodiment
To more fully understand the present invention, the present invention is further elaborated with reference to embodiment, but embodiment not structure Into limiting the scope of the invention.
In following embodiment, comparative example, the corrosivity of use common 304 stainless steel test materials in the market makes The stainless steel sheet specimens of 50mm × 20mm × 2 through acetone and alcohol washes, are embedded to after weighing in fuse salt, in Muffle furnace 500 ± 1 DEG C are kept for 10 days, and taking-up is cleaned with acetone, the quality after corrosion are weighed after removing corrosion product, using Shimadzu SHIMADZU electronic balances are weighed.
In following embodiment, comparative example, the degree of supercooling of material is measured using ZDR-21 type binary channels moisture recorder.
In following embodiment, comparative example, the thermal conductivity factor of material is measured using DRL-II type heat flow methods conductometer.
In following embodiment, comparative example, the phase transition temperature and latent heat of material are measured using HCT-4 type microcomputers differential thermal balance, Heating rate be 10 DEG C/min, 25~600 DEG C of temperature range.
Embodiment 1
The magnesium nitrate hexahydrate of 100 parts by weight is weighed, stainless steel sealing container is put into after pulverization process, is placed in KDM types 92 DEG C are heated in control-temperature electric heating set, the cetylamine of 0.1 parts by weight is then added in while stirring, until being melt into melting completely Liquid, adds in the neopelex of 0.1 parts by weight in molten liquid, and ultrasonic disperse processing 30min obtains dispersion liquid; The famille rose of the graphite of 0.5 parts by weight, the sodium carboxymethylcellulose of 1 parts by weight and 0.5 parts by weight is sequentially added in dispersion liquid, is filled Divide and postcooling is mixed evenly to get phase-changing energy storage material.
Embodiment 2
The magnesium nitrate hexahydrate of 100 parts by weight is weighed, stainless steel sealing container is put into after pulverization process, is placed in KDM types 93 DEG C are heated in control-temperature electric heating set, the cetylamine of 0.5 parts by weight is then added in while stirring, until being melt into melting completely Liquid, adds in the neopelex of 0.5 parts by weight in molten liquid, and ultrasonic disperse processing 35min obtains dispersion liquid; The lemon yellow of the graphite of 1 parts by weight, the sodium carboxymethylcellulose of 2 parts by weight and 0.5 parts by weight is sequentially added in dispersion liquid, fully Postcooling is mixed evenly to get phase-changing energy storage material.
Embodiment 3
The magnesium nitrate hexahydrate of 100 parts by weight is weighed, stainless steel sealing container is put into after pulverization process, is placed in KDM types 93 DEG C are heated in control-temperature electric heating set, then adds in the cetylamine of 1 parts by weight while stirring, until it is melt into molten liquid completely, The neopelex of 1 parts by weight is added in molten liquid, ultrasonic disperse processing 35min obtains dispersion liquid;In dispersion liquid In sequentially add the lemon yellow of the graphite of 2.5 parts by weight, the sodium carboxymethylcellulose of 5 parts by weight and 0.5 parts by weight, be sufficiently mixed Postcooling is stirred evenly to get phase-changing energy storage material.
Embodiment 4
The magnesium nitrate hexahydrate of 100 parts by weight is weighed, stainless steel sealing container is put into after pulverization process, is placed in KDM types 92 DEG C are heated in control-temperature electric heating set, then adds in the cetylamine of 2 parts by weight while stirring, until it is melt into molten liquid completely, The neopelex of 2 parts by weight is added in molten liquid, ultrasonic disperse processing 40min obtains dispersion liquid;In dispersion liquid In sequentially add the sunset yellow of the graphite of 5 parts by weight, the sodium carboxymethylcellulose of 10 parts by weight and 0.5 parts by weight, be sufficiently mixed Postcooling is stirred evenly to get phase-changing energy storage material.
Embodiment 5
The magnesium nitrate hexahydrate of 100 parts by weight is weighed, stainless steel sealing container is put into after pulverization process, is placed in KDM types 93 DEG C are heated in control-temperature electric heating set, then adds in the tallow amine of 1 parts by weight while stirring, until it is melt into molten liquid completely, The sodium taurocholate of 1 parts by weight is added in molten liquid, ultrasonic disperse processing 35min obtains dispersion liquid;It is sequentially added in dispersion liquid The amaranth of the graphite of 2.5 parts by weight, the carboxymethyl cellulose of 5 parts by weight and 0.5 parts by weight, be sufficiently mixed stir evenly it is rear cold But to get phase-changing energy storage material.
Embodiment 6
The magnesium nitrate hexahydrate of 100 parts by weight is weighed, stainless steel sealing container is put into after pulverization process, is placed in KDM types 92 DEG C are heated in control-temperature electric heating set, then adds in the cetylamine of 1 parts by weight while stirring, until it is melt into molten liquid completely, The neopelex of 0.5 parts by weight is added in molten liquid, ultrasonic disperse processing 35min obtains dispersion liquid;Disperseing The indigo of the graphite of 2.5 parts by weight, the sodium carboxymethylcellulose of 5 parts by weight and 0.5 parts by weight is sequentially added in liquid, is sufficiently mixed Postcooling is stirred evenly to get phase-changing energy storage material.
Comparative example 1
The magnesium nitrate hexahydrate of 100 parts by weight is weighed, stainless steel sealing container is put into after pulverization process, is placed in KDM types Be heated to 93 DEG C in control-temperature electric heating set, until be melt into molten liquid completely, sequentially added in molten liquid 2.5 parts by weight graphite, 5 The erythrosine of the sodium carboxymethylcellulose of parts by weight and 0.5 parts by weight is sufficiently mixed and stirs evenly postcooling to get phase-change accumulation energy Material.
Comparative example 2
The magnesium nitrate hexahydrate of 100 parts by weight is weighed, stainless steel sealing container is put into after pulverization process, is placed in KDM types 93 DEG C are heated in control-temperature electric heating set, the cetylamine of 1 parts by weight is then added in while stirring, until being melt into molten liquid completely; The lemon yellow of the graphite of 2.5 parts by weight, the sodium carboxymethylcellulose of 5 parts by weight and 0.5 parts by weight is sequentially added in molten liquid, It is sufficiently mixed and stirs evenly postcooling to get phase-changing energy storage material.
The test result of embodiment 1-6 and comparative example 1-2 see the table below:
* it cools down at room temperature, observes the condensation situation of material on cooling initial stage chamber wall, wherein a large amount of significantly condensations are designated as 2, The a small amount of condensation in part is designated as 1, and no condensation is designated as 0.
It can be seen that compared with comparative example 1 from the test result in table, it is real due to adding in corrosion inhibiter and surfactant The corrosion rate for applying material in a 1-6 is remarkably decreased, and the corrosion resistance of material is improved, material on stainless steel wall not Easily condensation, and the thermal conductivity of material and degree of supercooling are also improved;Compared with comparative example 2 only individually adds corrosion inhibiter, implement Corrosion inhibiter and surfactant mating reaction in example 1-6, can obtain preferably corrosion-resistant and surface anti-agglomeration effect;From reality It applies in the test result of example 2 and 3 as can be seen that using special ratios and the corrosion inhibiter and surfactant of dosage so as to produce Synergistic enhancing effect, the corrosion resistance of material and is greatly improved in the performance for being not easy to condense on stainless steel wall, obtains Unexpected technique effect.
It should be pointed out that the related technical personnel of this research field are not it should be recognized that departing from the skill of the invention provided In the case of art feature and range, increase, the replacement made to technical characteristic all belong to the scope of protection of the present invention.

Claims (10)

1. a kind of 89 degree of phase-changing energy storage materials, which is characterized in that the material is made of the component of following parts by weight:Six hydration nitre Sour 100 parts of magnesium, 0.5~5 part of graphite, 0.5~10 part of thickener, 0.1~2 part of corrosion inhibiter, 0.1~2 part of surfactant, coloring 0.1~1 part of agent.
2. 89 degree of phase-changing energy storage materials according to claim 1, which is characterized in that the thickener is carboxymethyl cellulose At least one of sodium, carboxymethyl cellulose, hydroxyethyl cellulose, konjaku glucomannan.
3. 89 degree of phase-changing energy storage materials according to claim 1, which is characterized in that the corrosion inhibiter is tallow amine, 16 At least one of alkanamine, octadecylamine.
4. 89 degree of phase-changing energy storage materials according to claim 1, which is characterized in that the surfactant is dodecyl At least one of benzene sulfonic acid sodium salt, sodium taurocholate, cetyl trimethylammonium bromide.
5. 89 degree of phase-changing energy storage materials according to claim 1, which is characterized in that the colorant is amaranth, kermes At least one of red, erythrosine, newly red, lemon yellow, sunset yellow, indigo, brilliant blue.
6. 89 degree of phase-changing energy storage materials according to claim 1, which is characterized in that the parts by weight of the corrosion inhibiter are 0.5 ~1 part, the parts by weight of the surfactant are 0.5~1 part.
7. 89 degree of phase-changing energy storage materials according to claim 1, which is characterized in that the weight of corrosion inhibiter and surfactant Than being 1: 1.
A kind of 8. method for preparing 89 degree of phase-changing energy storage materials according to claims 1 to 7, which is characterized in that including with Lower step:
(1) stainless steel sealing container will be put into after magnesium nitrate hexahydrate pulverization process, be placed in KDM types control-temperature electric heating set and be heated to 90~95 DEG C, corrosion inhibiter is then added in while stirring, until being melt into molten liquid completely;
(2) surfactant is added in molten liquid, ultrasonic disperse handles 30~40min, obtains dispersion liquid;
(3) graphite, thickener and colorant are added in dispersion liquid, postcooling is mixed evenly to get phase-changing energy storage material.
9. a kind of application method of 89 degree of phase-changing energy storage materials, which is characterized in that include the following steps:
(1) 89 degree of phase-changing energy storage materials are prepared according to the method in claim 8, it is spare;
(2) stainless steel pipe inner wall is handled with metal conditioner, the dirt on pipe inner wall is removed, at the metal surface It is acetone or ethyl alcohol to manage agent;
(3) conduit, which is placed in heat source, is maintained under 90~95 DEG C of temperature condition, and 89 degree of phase-changing energy storage materials are heated to Molten condition is injected in conduit while hot, and sealing recession is except heat source, cooling.
10. the application of 89 degree of phase-changing energy storage materials according to claims 1 to 7, which is characterized in that 89 degree of phase transformations storage Energy material is applied to the Latent Heat Storage Exchanger in co-generation unit.
CN201810203419.5A 2018-01-03 2018-03-12 89-degree phase change energy storage material Expired - Fee Related CN108251074B (en)

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CN108795390A (en) * 2018-07-31 2018-11-13 青海大学 A kind of phase-changing energy storage material containing thickener
CN109609098A (en) * 2018-12-12 2019-04-12 上海交通大学 A kind of composite phase-change heat-storage material and its preparation
CN110066642A (en) * 2019-04-09 2019-07-30 中国科学院过程工程研究所 89 ± 7 DEG C of phase transition temperature of phase-changing energy storage material and preparation method thereof
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108795390A (en) * 2018-07-31 2018-11-13 青海大学 A kind of phase-changing energy storage material containing thickener
CN109609098A (en) * 2018-12-12 2019-04-12 上海交通大学 A kind of composite phase-change heat-storage material and its preparation
CN110066642A (en) * 2019-04-09 2019-07-30 中国科学院过程工程研究所 89 ± 7 DEG C of phase transition temperature of phase-changing energy storage material and preparation method thereof
CN110066642B (en) * 2019-04-09 2021-06-08 中国科学院过程工程研究所 Phase change energy storage material with phase change temperature of 89 +/-7 ℃ and preparation method thereof
CN113980652A (en) * 2021-11-05 2022-01-28 北京科技大学 Consistent-melting composite phase-change material and preparation method thereof

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