CN110836544A - Solar photo-thermal conversion component and processing method thereof - Google Patents
Solar photo-thermal conversion component and processing method thereof Download PDFInfo
- Publication number
- CN110836544A CN110836544A CN201910923846.5A CN201910923846A CN110836544A CN 110836544 A CN110836544 A CN 110836544A CN 201910923846 A CN201910923846 A CN 201910923846A CN 110836544 A CN110836544 A CN 110836544A
- Authority
- CN
- China
- Prior art keywords
- thermal conversion
- solar photo
- conversion component
- metal particles
- transparent tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/10—Details of absorbing elements characterised by the absorbing material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/60—Details of absorbing elements characterised by the structure or construction
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention belongs to the technical field of solar energy conversion, and particularly relates to a solar photo-thermal conversion component and a processing method thereof. The solar photo-thermal conversion component is formed by bundling a plurality of transparent tubes through a bundling belt, the outer walls of the transparent tubes form stripe-shaped parallel circular rings along the axial direction, and the circular rings are composed of metal particles. The processing method comprises the following steps: dispersing metal particles in the solution by ultrasonic oscillation to prepare nanofluid; soaking a bundle of bundled transparent tubes in nano fluid; and (3) putting the transparent tube bundle soaked with the nanofluid into a sintering furnace, sequentially heating at high temperature, preserving heat for a certain time, and then cooling to room temperature. The invention skillfully utilizes the evaporation of the nanometer fluid in the limited space to self-assemble the nanometer particles on the outer wall surface of the transparent tube to form a component, thereby avoiding the aggregation and sedimentation of the nanometer particles in the liquid and influencing the efficiency and the safety of the solar photo-thermal conversion system.
Description
Technical Field
The invention belongs to the technical field of solar energy conversion, and particularly relates to a solar photo-thermal conversion component and a processing method thereof.
Background
With the consumption of fossil fuels such as coal, oil, natural gas, etc., and the increasing global warming effect, the utilization of new energy such as solar energy is more and more important. At present, solar energy utilization is principally classified into photoelectric conversion and photothermal conversion. The photo-thermal conversion can be used for heating, refrigerating and the like, so that the energy conservation of the building is realized; in addition, the photo-thermal conversion can also generate steam to drive a steam turbine and a generator to generate electricity. Due to the plasmon resonance absorption principle of the nanoparticles, high heat conductivity coefficient and other properties, metal nanoparticles are often added into the fluid introduced into the solar heat exchanger to form nanofluid, so that the heat exchange effect is enhanced, the surface temperature of the photo-thermal conversion container is reduced, and the photo-thermal conversion efficiency is finally improved. However, the nanofluid is easy to agglomerate and settle in long-time operation, which not only deteriorates heat transfer performance, but also may cause blockage to system power equipment, thereby posing a safety threat. Therefore, a new solar photo-thermal conversion component is required to be sought, so that plasmon resonance absorption is realized on the solid surface, and the defects caused by application of nanofluid are avoided.
Disclosure of Invention
Aiming at the problems, the invention provides a solar photo-thermal conversion component and a processing method thereof.
A solar photo-thermal conversion component is formed by bundling a plurality of transparent tubes through a bundling belt, wherein the outer walls of the transparent tubes form parallel striped rings along the axial direction, and the rings are composed of metal particles.
The diameters of the transparent tubes are all in millimeter level, and the diameter of the inner transparent tube is smaller than that of the outer transparent tube.
The strap is made of shape memory alloy.
The metal particles are nano-sized and ellipsoidal.
The width and spacing of the rings is on the order of 100 nanometers, close to the wavelength of light.
When the solar photo-thermal conversion component works, the solar photo-thermal conversion component is inserted into liquid, and the metal particles on the transparent tube realize plasmon resonance absorption of light and convert the light into heat energy, so that the liquid is heated into steam, and a heat source or a power source is provided.
A processing method of a solar photo-thermal conversion component comprises the following steps:
dispersing metal particles in the solution by ultrasonic oscillation to prepare nanofluid;
soaking a bundle of bundled transparent tubes in nano fluid;
and (3) putting the transparent tube bundle soaked with the nanofluid into a sintering furnace, sequentially heating at high temperature, preserving heat for a certain time, and then cooling to room temperature.
The solution comprises the following components: volatile and nontoxic solution containing alcohol and n-hexane.
The contact line of the nano fluid and the transparent tube in the sintering furnace is withdrawn and evaporated along the axial direction of the transparent tube, metal particles in the nano fluid are deposited on the surface of the transparent tube, and the deposited metal particles adversely affect the motion of the contact line, so that the movement of the contact line is discontinuous; finally, the distribution of the metal particles in the transparent tube is not continuous, but self-assembled into rings with equal intervals; the metal particles diffuse heat to the outer wall of the transparent tube in the high-temperature environment of the sintering furnace, so that the metal particles are welded with the transparent tube.
The size and the distance of the circular rings are adjusted by controlling the size of the gap between the transparent tubes, the concentration of the nano fluid and the withdrawing rate of the contact line.
The invention has the beneficial effects that:
the invention skillfully utilizes the evaporation of the nanometer fluid in the limited space to self-assemble the nanometer particles on the outer wall surface of the transparent tube to form the component. The component manufacturing process has strong operability and low cost, can efficiently, reliably and controllably realize solar photo-thermal conversion, and avoids nanoparticles from agglomerating and settling in liquid and influencing the efficiency and safety of a solar photo-thermal conversion system.
The depth of the solar photo-thermal conversion element inserted into the liquid is changed, the photo-thermal conversion amount can be controlled, and the generated steam amount and heat quantity can be adjusted.
The bridle adopts shape memory alloy, when guaranteeing elasticity under high temperature, avoids the transparent tube to be crowded garrulous.
The width and the interval of the circular rings are close to the wavelength of light, so that plasmon resonance absorption of the light is facilitated, and the light is converted into heat energy.
Drawings
FIG. 1 is a schematic diagram of a solar photo-thermal conversion component structure and working principle of the invention
Fig. 2 is a schematic diagram of a preparation method and a preparation principle of a solar photo-thermal conversion component according to the invention.
Reference numbers in the figures: the solar energy photo-thermal conversion device comprises a solar photo-thermal conversion component 1, a liquid 2, a solar condenser 3, a sun 4, steam 5, a transparent tube 6, a bridle 7, metal particles 8, a ring 9, a solution 10, a nanofluid 11, a container 12, a sintering furnace 13, a gap 14 and a contact line 15.
Detailed Description
The invention is described in further detail below with reference to the attached drawing figures, but the invention is not limited in any way by the claims.
Fig. 1 is a schematic diagram of the structure and the working principle of a solar photo-thermal conversion component. When the solar photo-thermal conversion component 1 works, the solar photo-thermal conversion component is placed in a solar condenser 3 containing liquid 2, light waves emitted by the sun 4 are converted into heat energy through the surface plasmon resonance absorption principle, steam 5 is generated (as shown in figure 1a), and the heat energy is used for heating and refrigerating buildings or driving a steam turbine to drive a generator to generate electricity. The solar photo-thermal conversion component 1 is formed by closely arranging transparent tubes 6 with different diameters under the bundling of a binding band 7. The inner transparent tube 6 has a small diameter and the outer transparent tube 6 has a large diameter (see fig. 1 b). The bridle 7 is made of shape memory alloy, so that the transparent tube 6 is prevented from being crushed while the elasticity is ensured at high temperature. Each transparent tube 6 is welded with metal particles 8, and the metal particles 8 are self-assembled into parallel circular rings 9 on the outer wall of the transparent tube 6 (as shown in fig. 1 c). Preferably, the transparent tube 6 is of the order of millimetres in diameter; the width and the spacing of the circular rings 9 are 100 nanometers.
Fig. 2 is a schematic diagram of a preparation method and a preparation principle of a solar photo-thermal conversion component according to the invention. The preparation process mainly comprises two steps: first, as shown in fig. 2a, a nanofluid 11 is prepared by dispersing metal particles 8 in a solution 10 by means of ultrasonic oscillation, and is contained in a container 12. A bundle of transparent tubes 6 bundled by a band 7 is immersed in a nanofluid 11 contained in a container 12. Then, as shown in fig. 2b, the transparent tube 6 bundle soaked with the nanofluid 11 is placed into a sintering furnace 13, sequentially heated at a high temperature, kept at the temperature for a certain time, and then cooled to room temperature. Preferably, the sintering furnace is heated to 650 ℃ for 30 minutes, kept warm for 1 hour and then naturally cooled to room temperature. Preferably, the metal particles are 8 nanometers in size, ellipsoidal in shape and made of gold; the solution 10 is volatile and nontoxic solution such as alcohol and n-hexane, preferably n-hexane.
After the above two steps, the outer wall of the transparent tube 6 is welded with the self-organized metal particles 8, and the principle is as shown in fig. 2 c. The transparent tubes 6 are tightly arranged under the bundling of the binding bands 7, and gaps 14 are formed between the adjacent transparent tubes 6. After the bundle of transparent tubes 6 is soaked in the nanofluid 11, the nanofluid 11 fills the gap 14. When the transparent tube 6 bundle is put into a sintering furnace 13 to be heated, the solution 10 in the nanofluid 11 is evaporated, the contact line 15 between the nanofluid 11 and the transparent tube 6 is continuously withdrawn in the gap 14, and the metal particles 8 in the nanofluid 11 are deposited on the contact line. The deposited metal particles 8 in turn influence the movement of the contact wire 15, resulting in a discontinuous movement of the contact wire 15. Finally, the distribution of the metal particles 8 in the transparent tube 6 is not continuous, but self-organized into equally spaced rings 9. The metal particles 8 of the self-organizing annular ring 9 diffuse heat to the outer wall of the transparent tube 6 in the high temperature environment of the sintering furnace 13, thereby being welded with the transparent tube 6. The transparent tubes 6 welded with the self-organizing metal particles 8 are gathered into a bundle, and the solar photo-thermal conversion component is formed.
According to the invention, the nano particles 8 are orderly welded on the outer wall of the transparent tube 6 at low cost, and the solar photo-thermal conversion is efficiently, reliably and controllably realized by the surface plasmon resonance absorption principle, so that the nano particles 8 are prevented from agglomerating in the liquid 2 and influencing the efficiency and safety of a solar photo-thermal conversion system, and the method is an innovative technology and a key technology in the field of new energy utilization.
Example 1:
the transparent tube is a quartz glass tube with two specifications: an inner diameter of 2.5 mm and an outer diameter of 3 mm; the other inner diameter is 1.6 mm and the outer diameter is 2 mm. The quartz glass tubes are 0.6 m long, and the two quartz glass tubes are respectively bundled into bundles, and the number of each bundle of glass tubes is 1000. And placing the glass tube bundles in a container filled with the nanofluid for soaking for 10 minutes to ensure that gaps among the quartz glass tube bundles are filled with the nanofluid. The nanofluid is prepared by ultrasonically dispersing ellipsoidal gold nanoparticles in a normal hexane solution. The major axis of the ellipsoidal gold nanoparticles is 50 nanometers, and the minor axis is 30 nanometers. The mass concentration of gold nanoparticles in the nanofluid was 0.05%.
And taking out the quartz glass tube bundle soaked with the nano fluid from the container, and placing the quartz glass tube bundle in a sintering furnace. And (3) raising the temperature of the sintering furnace to 650 ℃ for 30 minutes, preserving the heat for 1 hour, and naturally cooling to room temperature. During the heating process of the quartz glass tube bundle in the sintering furnace, the nanofluid among the gaps is evaporated, the contact line between the nanofluid and the outer wall of the quartz glass tube is discontinuously withdrawn, and the gold particles in the nanofluid are deposited on the contact line and self-organized to form parallel circular rings with the width of 150 nanometers and the distance of 150 nanometers, and the parallel circular rings cover the outer wall of the quartz glass tube. The nano fluid is completely evaporated within 2 minutes, then the temperature of the sintering furnace is continuously increased, and the gold particles which are patterned into parallel circular rings and self-organized are welded on the outer wall of the quartz glass tube by utilizing the thermal diffusion principle.
The outer wall of the quartz glass tube is welded with self-organizing gold particles, and the quartz glass tube is bundled into a tube bundle by a nickel-titanium shape memory alloy binding band: an inner layer is arranged in a quartz glass tube with the inner diameter of 1.6 mm and the outer diameter of 2 mm; the quartz glass tube with the inner diameter of 2.5 mm and the outer diameter of 3 mm is arranged on the outer layer to form the solar photo-thermal conversion component. The solar photo-thermal conversion component is placed in water in the solar heat collecting tube, and self-organized gold particles on the quartz glass tube realize plasmon resonance absorption of light and convert the light into heat energy, so that the water is heated into steam, and the steam can be used for heating and refrigerating buildings or can be used for pushing a steam turbine and driving a generator to generate electricity. The depth of the solar photo-thermal conversion element inserted into the liquid is changed, the photo-thermal conversion amount can be controlled, and the generated steam amount can be adjusted.
The embodiments are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A solar photo-thermal conversion component is characterized by being formed by bundling a plurality of transparent tubes through a bundling belt, wherein stripe-shaped parallel circular rings are formed on the outer walls of the transparent tubes along the axial direction, and the circular rings are composed of metal particles.
2. The solar photo-thermal conversion component as claimed in claim 1, wherein the diameters of the transparent tubes are all in millimeter order, and the diameter of the inner transparent tube is smaller than that of the outer transparent tube.
3. The solar photo-thermal conversion component as claimed in claim 1, wherein the strap is made of shape memory alloy.
4. The solar photo-thermal conversion component according to claim 1, wherein the metal particles are nano-sized and ellipsoidal.
5. The solar photo-thermal conversion component according to claim 1, wherein the width and the distance of the circular rings are on the order of 100 nm and close to the wavelength of light.
6. The solar photo-thermal conversion component of claim 1, wherein when the solar photo-thermal conversion component works, the solar photo-thermal conversion component is inserted into liquid, and the metal particles on the transparent tube realize plasmon resonance absorption of light and convert the light into heat energy, so that the liquid is heated into steam, and a heat source or a power source is provided.
7. A processing method of the solar photo-thermal conversion component based on any one of claims 1 to 6 is characterized by comprising the following steps:
dispersing metal particles in the solution by ultrasonic oscillation to prepare nanofluid;
soaking a bundle of bundled transparent tubes in nano fluid;
and (3) putting the transparent tube bundle soaked with the nanofluid into a sintering furnace, sequentially heating at high temperature, preserving heat for a certain time, and then cooling to room temperature.
8. The processing method of the solar photo-thermal conversion component according to claim 7, wherein the solution comprises: volatile and nontoxic solution containing alcohol and n-hexane.
9. The processing method of the solar photo-thermal conversion component according to claim 7, wherein the contact line of the nanofluid and the transparent tube in the sintering furnace is withdrawn and evaporated along the axial direction of the transparent tube, metal particles in the nanofluid are deposited on the surface of the transparent tube, and the deposited metal particles adversely affect the movement of the contact line, resulting in discontinuous movement of the contact line; finally, the distribution of the metal particles in the transparent tube is not continuous, but self-assembled into rings with equal intervals; the metal particles diffuse heat to the outer wall of the transparent tube in the high-temperature environment of the sintering furnace, so that the metal particles are welded with the transparent tube.
10. The method for processing a solar photo-thermal conversion component according to claim 7, wherein the size and the spacing of the rings are adjusted by controlling the size of the gap between the transparent tubes, the concentration of the nanofluid and the withdrawal rate of the contact line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910923846.5A CN110836544A (en) | 2019-09-27 | 2019-09-27 | Solar photo-thermal conversion component and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910923846.5A CN110836544A (en) | 2019-09-27 | 2019-09-27 | Solar photo-thermal conversion component and processing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110836544A true CN110836544A (en) | 2020-02-25 |
Family
ID=69575312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910923846.5A Pending CN110836544A (en) | 2019-09-27 | 2019-09-27 | Solar photo-thermal conversion component and processing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110836544A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116621262A (en) * | 2023-06-25 | 2023-08-22 | 佛山市南伽科技有限公司 | MoS-based 2 Three-dimensional dynamic sea water desalination device |
-
2019
- 2019-09-27 CN CN201910923846.5A patent/CN110836544A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116621262A (en) * | 2023-06-25 | 2023-08-22 | 佛山市南伽科技有限公司 | MoS-based 2 Three-dimensional dynamic sea water desalination device |
| CN116621262B (en) * | 2023-06-25 | 2024-05-14 | 佛山市南伽科技有限公司 | MoS-based2Three-dimensional dynamic sea water desalination device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mahian et al. | Recent advances in using nanofluids in renewable energy systems and the environmental implications of their uptake | |
| Kabeel et al. | Performance enhancement of pyramid-shaped solar stills using hollow circular fins and phase change materials | |
| Ahmadi et al. | Utilization of hybrid nanofluids in solar energy applications: a review | |
| Farhana et al. | Improvement in the performance of solar collectors with nanofluids—A state-of-the-art review | |
| Wahab et al. | Solar energy systems–potential of nanofluids | |
| Kalidasan et al. | Phase change materials integrated solar thermal energy systems: Global trends and current practices in experimental approaches | |
| Kateshia et al. | Analysis of solar still integrated with phase change material and pin fins as absorbing material | |
| Ali | Phase change materials based thermal energy storage for solar energy systems | |
| Fikri et al. | Recent progresses and challenges in cooling techniques of concentrated photovoltaic thermal system: A review with special treatment on phase change materials (PCMs) based cooling | |
| CN101599722B (en) | Solar power generation apparatus and method thereof | |
| Aggarwal et al. | A comprehensive review of techniques for increasing the efficiency of evacuated tube solar collectors | |
| Aboelmaaref et al. | Research on solar dish/Stirling engine driven adsorption-based desalination system for simultaneous co-generation of electricity and freshwater: Numerical investigation | |
| CN102817799A (en) | Tower type Tesla turbine solar power generation device | |
| CN104993776A (en) | Solar energy tower type optical-condensation heat-storage thermophotovoltaic power generation system | |
| CN102418679A (en) | Solar energy and exogenous steam complementary power generation equipment | |
| Shao et al. | Popcorn-derived porous carbon based adipic acid composite phase change materials for direct solar energy storage systems | |
| CN110836544A (en) | Solar photo-thermal conversion component and processing method thereof | |
| Rashid et al. | Development of phase change materials/nanoparticles for thermal energy storage | |
| Madhi et al. | A review of photovoltaic/thermal system cooled using mono and hybrid nanofluids | |
| Khodadadi et al. | Review on poly-generation application of photovoltaic/thermal systems | |
| Omeiza et al. | Challenges, limitations, and applications of nanofluids in solar thermal collectors—a comprehensive review | |
| CN101382277B (en) | Solar molten salt sleeve pipe type steam generation method and device thereof | |
| WO2023133909A1 (en) | Glass crystal-based actively-controllable barocaloric material solid state phase transformation heat storage and heat release method, apparatus and uses | |
| Chichghare et al. | Applications of nanofluids in solar thermal systems | |
| Ahmed et al. | Nano engineered materials in solar energy systems for clean environment–A review |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200225 |