CN107560199A - A kind of bionical collection thermal medium of frog ovum and its manufacture method - Google Patents
A kind of bionical collection thermal medium of frog ovum and its manufacture method Download PDFInfo
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- CN107560199A CN107560199A CN201710929470.XA CN201710929470A CN107560199A CN 107560199 A CN107560199 A CN 107560199A CN 201710929470 A CN201710929470 A CN 201710929470A CN 107560199 A CN107560199 A CN 107560199A
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- thermal medium
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The present invention proposes a kind of bionical collection thermal medium of frog ovum and its manufacture method, wherein collection thermal medium are made up of external mold and kernel, and external mold is coated on outside kernel.From nano carbon black powder as heat-absorbing material, grease is as phase-change heat-storage material, and absolute ethyl alcohol is as dispersion liquid.Carbon black and grease are weighed, is added in absolute ethyl alcohol and then stirs, carbon black and grease is disperseed in absolute ethyl alcohol.Mixed liquor is injected in particle, the little particle being poured in then is cooled to room temperature, so that it becomes solid elastomer, you can forms the structure of frog ovate.The present invention utilizes bionics principle, and collection thermal medium is designed as to the novel heat collecting medium with frog ovum structure, can protect heat absorption heat transfer component.Frog ovum structure can play a protective role to nano carbon black, it is not easy aggregation caking.Phase-change heat-storage material is added, effectively storage recycling can be carried out to absorbing the solar energy come, greatly improve solar thermal utilization rate.Lower cost for material used in the collection thermal medium.
Description
Technical field
The present invention relates to solar energy heat utilization, more particularly to a kind of bionical collection thermal medium of frog ovum, belong to solar energy
Heat utilization field.
Background technology
In recent years, the excessive energy and environment using to the earth of fossil fuel brings huge pressure.Solar energy is made
For a kind of green, unlimited energy, the visual field of people is progressed into.Solar use is broadly divided into photovoltaic (PV) and photo-thermal
(PT) two major class.At present, photovoltaic utilization is more extensive, technology relative maturity.But during photovoltaic utilizes, it can still give ring
Certain pollution is brought in border, and energy consumption is higher, and the efficiency of light energy utilization is relatively low.By contrast, solar thermal utilization is green non-pollution
Process, what it was used is substantially physical change to carry out conversion of the luminous energy to heat energy.Solar thermal utilization process is to utilize collection thermal medium
By the energy absorption of solar radiation, then convert solar energy into heat energy and be used.Collection thermal medium is in solar energy heat utilization
In play critically important effect.But the thermal-arrest and heat storage capacity of collection thermal medium be not high, governs the development of solar thermal utilization.
In order to improve solar thermal utilization efficiency, some scholars explore some new collection thermal mediums.In the nineties in last century
Phase, the Chio of Argonne National Laboratories of the U.S. etc. proposes nano-fluid concept, i.e., nano level metal or non-metallic powder
It is distributed in the base fluids such as water, alcohol, oil, is prepared into uniform, stable suspension system.Research is found, nano-fluid is applied to
The thermal conductivity of collection thermal medium can be substantially improved, so as to improve photothermal deformation as collection thermal medium in solar energy heat utilization field
Efficiency.However, nano-fluid has notable defect, its stability is not good enough, under gravity particle free settling, collection in suspension
Poly-, long-term use can have a strong impact on collecting efficiency.In addition nano-fluid prepares complex, and required cost is higher, therefore, receives
Meter Liu Ti does not have large-scale application among daily life.
Publication No. CN106941972A patent《A kind of black solar energy composite of dynamic China utilizes greenhouse apparatus》, propose
It is the efficient nano fluid of solar energy heat utilization by Chinese prepared Chinese ink exploitation, is acted on and realized by the light splitting of photonic crystal reflecting plate
Plantation, in one, improves heat absorption efficiency using Chinese prepared Chinese ink and reduces cost, unit combined rotor dynamical system carries with thermal-arrest
High solar thermal utilization efficiency, realizes that solar energy highly effective utilizes.But China's ink in the patent still has precipitation existing as collection thermal medium
As occurring, and there is impurity component in Chinese ink, photo-thermal conversion efficiency is had a certain impact.
Bionics is an ancient and young science.People study the principle of the 26S Proteasome Structure and Function work of organism,
And new equipment, instrument and science and technology are invented according to these principles, create suitable for production, the advanced skill of studying and living
Art.Frog ovum internal layer is ovum, and outer layer is transparent cutose, and the ovum of inside is shielded, while its transparent state
Solar radiation can be absorbed, temperature is lifted in egg hatching, accelerates the speed of its hatching.
The content of the invention
The present invention proposes a kind of bionical collection thermal medium of frog ovum and its manufacture method, proposes to coat solar energy heat absorbing material
Frog ovate is formed in film, is applied in frog ovate collection thermal medium in the base fluid of solar energy heat utilization device, frog ovum
Shape collection thermal medium is suspended in the reunion and sedimentation that solar energy heat absorbing material is prevented in base fluid, such as the materials such as TPU, carbon black are made
The efficient heat-collecting medium of solar energy heat utilization with frog ovum morphosis, outer membrane is thermoplastic elastomer (TPE) TPU, to whole
Individual collection thermal medium plays stable and protective effect；Thermal-arrest kernel is made up of nano carbon black, dispersion liquid, and wherein carbon black is to absorb solar energy
Main component, dispersion liquid can select it is identical with base fluid, in order that frog ovate collection thermal medium is freely suspended in base fluid, point
Dispersion liquid can select liquid similar in the density for causing manufactured frog ovate collection thermal medium and base fluid density；Can be with dispersion liquid
Phase-change heat-storage material is added, phase-change heat-storage material can be undergone phase transition when heat absorption is to certain temperature, in transformation temperature approximation isothermal
Heat accumulation heat release, improve collecting efficiency.
To realize above-mentioned function, the technical solution adopted by the present invention is as follows：A kind of bionical collection thermal medium of frog ovum, by external mold
Formed with kernel, external mold is coated on outside kernel.Outer membrane is made up of the transparent material film insoluble in base fluid, and outer membrane is also insoluble in interior
Nuclear material, such as can select TPU materials, TPU full name are TPUE, mainly have polyester-type and polyethers it
Point, its hardness range wide (60HA-85HD), wear-resisting, oil resistant, transparent, elasticity is good, is widely used in many fields, its
Density is 1.21g/cm3, more bigger than water, its fusing point is 170 degrees Celsius.TPU water resistances under muddiness are good, 1-2
It is interior to occur substantially to hydrolyze, especially with polyether series more preferably.By the use of polyether-type TPU materials as the outer membrane of thermal medium, to wrap
Kernel is wrapped up in, plays stable protective effect, its pellucidity can pass through sunshine.Kernel is mainly by heat-absorbing material and dispersion liquid group
Into heat-absorbing material selects nanoscale carbon black, and nano carbon black powder is black, and its particle diameter can reach 50nm, can effectively absorb
Solar radiation, particle size carbon black is more tiny, and light absorpting ability is higher.Because carbon black does not have self-dispersing, and charcoal in aqueous
Black particle diameter is nanoscale, has great specific surface area and high surface free energy, so carbon black particle compole is also easy to produce
Extremely strong aggregation force and form aggregate, it is scattered in water-based system so as to be unfavorable for it.It follows that to obtain scattered equal
The nano carbon black suspension of even stabilization, it is necessary to take certain scattered means.Nano carbon black is wrapped in elastomer by the present invention
Similar frog ovate particle is formed among grain, agglomeration can be suppressed to a certain extent in follow-up application.
A kind of bionical collection thermal medium of frog ovum of the present invention, phase-change material can be added in dispersion liquid, utilize the phase transformation of material
Latent heat realizes the storage of energy and utilization, be alleviate energy supply and demand both sides on time, intensity and the place it is unmatched effectively
Mode, the core of phase-change thermal storage technology is phase-change material, also known as latent heat storage material, is can absorb or discharges in phase transition process
The heat accumulating of energy, it absorbs or the heat of release is referred to as enthalpy of phase change or enthalpy change.Phase transition process is only dependent upon temperature,
It can be widely applied to heat storage and domain of control temperature.Solid-liquid phase change material, such as grease, grease are added in collection thermal medium
Transformation temperature be 37 degrees Celsius.The fluid temperature (F.T.) for needing to heat can be controlled near the transformation temperature of phase-change material, and phase
Become material reach transformation temperature after no longer heat up substantially, but by continue absorb heat difference store, for collection thermal medium without
Method continues to heat to fluid when absorbing heat, and enabled amount is fully used, and reduces and wastes, and improves efficiency.Phase-change material can basis
Choose application scenario.
A kind of manufacture method of the bionical collection thermal medium of frog ovum of the present invention, proportionally weighs heat-absorbing material and dispersion liquid,
Heat-absorbing material and dispersion liquid are sufficiently mixed to obtain uniform mixed liquor, outer membrane material is made be coated on it is outer outside mixed liquor
Film, mixed liquor are coated on the particle that frog ovate is formed in outer membrane as kernel.
A kind of manufacture method of the bionical collection thermal medium of frog ovum of the present invention, from nano carbon black powder as heat-absorbing material,
Grease is as phase-change heat-storage material, and absolute ethyl alcohol is as dispersion liquid.A small amount of carbon black and grease are taken, is added in absolute ethyl alcohol then
Stir, carbon black and grease is disperseed in absolute ethyl alcohol.TPU particles are heated to 160 degrees centigrades, brought it about light
Micro- thawing.The suspension configured is taken with small needle tube, is injected into the TPU particles of thawing, the little particle that then will be poured in
Room temperature is cooled to, so that it becomes solid elastomer, you can form the structure of frog ovate.The bionical collection thermal medium of whole frog ovum
Density is about 1g/cm3, the density approximately equal with water base fluid, so that whole medium can be uniformly distributed in base fluid water.
Because injection operating condition is relatively harsh, industrial mass production can not be carried out, then proposes a kind of utilize
The method that mould carries out industrial mass production.A kind of multi-cavity mold is designed first, and each mold cavity shapes size is identical, often
The uniform proper alignment of individual die cavity each row and column on mould.TPU membrane is made by raw material of TPU, cuts one piece of horizontal stroke for being more than mould
The TPU membrane in section；A TPU membrane is taken, is covered on the cross section of mould, while the mould above die cavity is entered into die cavity
In.It is sprayed at the finely dispersed absolute ethyl alcohol uniform suspension added with carbon black and grease is mixed by the mould of TPU membrane covering
On, after suspension is full of the die cavity of each envelope covering, the side of sprinkling suspension is covered in second TPU membrane,
Form the hierarchical structure that two films are sandwiched between suspension.It is using mechanical means, two moulds are real compact close.Along adjacent mold cavities
Between line of demarcation, the film after compacting is cut, you can obtain granular frog ovum collection thermal medium.Frog ovum can be imitated
The density domination of raw collection thermal medium is about 1g/cm3, the density approximately equal with water, so that whole medium can be in water uniformly
Distribution.
A kind of bionical collection thermal medium of frog ovum of the present invention and its manufacture method, its advantage and act as：
(1) structure is novel；Using bionics principle, the novel heat collecting that collection thermal medium is designed as having frog ovum structure is situated between
Matter, heat absorption heat transfer component can be protected.
(2) solar thermal utilization efficiency is improved.Frog ovum structure can play a protective role to nano carbon black, not allow it
Phenomena such as aggregation caking easily occurs.Phase-change heat-storage material is added simultaneously, effectively can be stored again to absorbing the solar energy come
Utilize, greatly improve solar thermal utilization rate.
(3) it is cost-effective.Lower cost for material used in the collection thermal medium.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the bionical collection thermal medium of frog ovum of the present invention.
In figure：1- outer membranes, 2- heat-absorbing materials, 3- phase-change heat-storage materials, 4- dispersion liquids.
Embodiment
As shown in figure 1, the present invention relates to a kind of bionical collection thermal medium of frog ovum, it is made up of external mold 1 and kernel.Outer membrane 1 can
To be made up of TPU membrane material, to wrap up kernel, stable protective effect is played.Its pellucidity can pass through sunshine.
The present invention relates to a kind of bionical collection thermal medium of frog ovum, the kernel of frog ovum collection thermal medium mainly by heat-absorbing material 2,
Dispersion liquid 4 forms.Heat-absorbing material 2 selects nano carbon black, and nano carbon black powder is black, can effectively absorb solar radiation,
Particle size carbon black is more tiny, and light absorpting ability is higher.
Phase-change material 3, such as grease etc., the stream that needs can be heated are added in the dispersion liquid 4 of collection thermal medium simultaneously
Temperature control near the transformation temperature of phase-change material 3, and phase-change material 3 reach transformation temperature after no longer heat up substantially, but
The heat storage of absorption will be continued, continue to heat to fluid when thermal medium can not absorb heat for solving, be that energy obtains fully
Utilize, reduce and waste, improve efficiency.
The present invention relates to a kind of manufacture method of the bionical collection thermal medium of frog ovum, from nano carbon black powder as heat absorption material
Material 2, grease is as phase-change heat-storage material 3, and absolute ethyl alcohol is as dispersion liquid 4.Carbon black is weighed according to the proportion requirement of application scenario
And grease, it is added in absolute ethyl alcohol and then stirs, carbon black and grease is disperseed in absolute ethyl alcohol.Will be finely dispersed
Mixed liquor, which is coated in TPU membrane, forms particle, and TPU particles 1 are heated into 160 degrees centigrades, bring it about slight thawing.
The suspension configured is taken with small needle tube, is injected into the TPU particles 1 of thawing, the little particle being poured in then is cooled to room
Temperature, so that it becomes solid elastomer, you can form the structure of frog ovate.Entirely the density of the bionical collection thermal medium of frog ovum is about
1g/cm3, and the density approximately equal of water, so that whole medium can be uniformly distributed in water.
Because injection operating condition is relatively harsh, industrial mass production can not be carried out, then proposes a kind of utilize
The method that mould carries out industrial mass production.Manufacture and design a kind of multi-cavity mold, each mold cavity shapes size phase first
Together, the big I of mold cavity shapes determines according to application requirement.The uniform proper alignment of each die cavity each row and column on mould, adjacent mould
The segment distance of chamber spacing one, so as to there is the square die cavity of multiple marshallings on a mould；Using TPU as raw material, it is made outer
Film 1, the thickness of outer membrane 1 is as far as possible thin, i.e., reduces the interference to heat absorption again with enough intensity and stop, the planar dimension of outer membrane 1
Need the size of the cross section more than mould；Carbon black and grease are taken, is added to certain proportion in absolute ethyl alcohol, makes it scattered equal
It is even.An outer membrane 1 is taken, is covered on the cross section of mould, while the mould above die cavity is entered in die cavity.With mixing point
Dissipate and be uniformly sprayed at added with the absolute ethyl alcohol uniform suspension of carbon black and grease on the mould covered by TPU membrane, when suspending
After die cavity of the liquid full of the covering of each envelope, the side of sprinkling suspension is covered in second TPU membrane, is formed in two films
Between accompany the hierarchical structure of suspension.It is using mechanical means, two moulds are real compact close.Along the line of demarcation between adjacent mold cavities,
Film after compacting is cut, you can obtain granular frog ovum collection thermal medium.The bionical collection thermal medium of whole frog ovum
Density is about 1g/cm3, the density approximately equal with water, so that whole medium can uniformly divide in the water base fluid of subsequent applications
Cloth.
Claims (7)
- A kind of 1. bionical collection thermal medium of frog ovum, it is characterised in that：It is made up of outer membrane and kernel, outer membrane is coated on outside kernel, outside Film is made up of the transparent membrane insoluble in base fluid, and outer membrane is also insoluble in inner nuclear material, and kernel is mainly by heat-absorbing material and dispersion liquid Composition, heat-absorbing material are dispersed in dispersion liquid.
- A kind of 2. bionical collection thermal medium of frog ovum according to claim 1, it is characterised in that：Phase transformation material is added in dispersion liquid Material.
- A kind of 3. bionical collection thermal medium of frog ovum according to claim 2, it is characterised in that：Phase-change material is grease.
- A kind of 4. manufacture method of bionical collection thermal medium of frog ovum according to claim 1, it is characterised in that：Proportionally Heat-absorbing material and dispersion liquid are weighed, heat-absorbing material and dispersion liquid are sufficiently mixed to obtain uniform mixed liquor, by outer membrane material system Into the outer membrane being coated on outside mixed liquor, mixed liquor is coated on the particle that frog ovate is formed in outer membrane as kernel.
- A kind of 5. manufacture method of bionical collection thermal medium of frog ovum according to claim 4, it is characterised in that：From nanometer Hydrocarbon black powder is as heat-absorbing material, and for grease as phase-change heat-storage material, absolute ethyl alcohol weighs carbon black and grease as dispersion liquid, It is added in absolute ethyl alcohol and then stirs, carbon black and grease is disperseed in absolute ethyl alcohol；Outer membrane is added using plastic grain Work is completed, and particle is heated to slight thawing；The suspension configured is taken with small needle tube, is injected into the particle of thawing, Then the little particle being poured in is cooled to room temperature, so that it becomes solid elastomer, the structure of formation frog ovate, the density of medium About 1g/cm3。
- A kind of 6. manufacture method of bionical collection thermal medium of frog ovum according to claim 5, it is characterised in that：Outer membrane material From TPU.
- A kind of 7. manufacture method of bionical collection thermal medium of frog ovum according to claim 4, it is characterised in that：The system of outer membrane Make method to complete using mould, make a set of multi-cavity mold first, each mold cavity shapes size is identical, and each die cavity is in mould The upper uniform proper alignment of each row and column；One block of plastic foil is taken, is covered on the cross section of mould, by the plastics above die cavity Mould enters in die cavity；Uniformly it is sprayed at mixed liquor on the mould covered by plastic foil, when mixed liquor is full of each envelope After the die cavity of covering, the side of sprinkling suspension is covered in second plastic foil, two plastic foils is formed and is sandwiched between mixing The hierarchical structure of liquid；It is using mechanical means, two plastic foil compactings are close；Along the line of demarcation between adjacent mold cavities to compacting after Film cut, obtain granular frog ovum collection thermal medium.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111205826A (en) * | 2020-01-08 | 2020-05-29 | 哈尔滨工业大学（威海） | Multi-sphere coupling phase change heat storage material structure simulating alveolus layout and heat storage tank |
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| CN103344147A (en) * | 2013-07-12 | 2013-10-09 | 北京依米康科技发展有限公司 | Phase change energy storage device |
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2017
- 2017-10-09 CN CN201710929470.XA patent/CN107560199A/en active Pending
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| US5804297A (en) * | 1995-07-05 | 1998-09-08 | Colvin; David P. | Thermal insulating coating employing microencapsulated phase change material and method |
| CN2791580Y (en) * | 2005-04-11 | 2006-06-28 | 王洋 | Low-resistance polyhedral efficient heat accumulating ball |
| CN103007849A (en) * | 2012-11-22 | 2013-04-03 | 广州奥翼电子科技有限公司 | Electrophoresis display microcapsule with multiple capsule walls and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111205826A (en) * | 2020-01-08 | 2020-05-29 | 哈尔滨工业大学（威海） | Multi-sphere coupling phase change heat storage material structure simulating alveolus layout and heat storage tank |
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