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Solar heat collecting tube, preparation method of solar heat collecting tube and testing method of solar heat collecting tube

A solar heat collecting tube and solar energy technology, which is applied in the parts of solar heat collectors, solar thermal energy, solar heat collectors, etc., can solve the problems of not easy to degrade, low service life of solar heat collecting materials, low energy conversion rate, etc. To achieve the effect of alleviating the rapid loss of heat energy

Pending Publication Date: 2022-05-03
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the process of collecting solar energy, traditional solar collectors have low solar energy capture efficiency, low energy conversion rate, and the solar heat collecting materials used have low service life and are not easy to Degradation and other issues

Method used

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  • Solar heat collecting tube, preparation method of solar heat collecting tube and testing method of solar heat collecting tube
  • Solar heat collecting tube, preparation method of solar heat collecting tube and testing method of solar heat collecting tube
  • Solar heat collecting tube, preparation method of solar heat collecting tube and testing method of solar heat collecting tube

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preparation example Construction

[0044] The present invention also provides a kind of preparation method of solar heat collecting tube, and this preparation method comprises the following steps:

[0045] (1) According to the mass ratio of 1:133, the dispersant is dissolved in deionized water, heated to a temperature of 45-65°C, and prepared into a dispersed phase; n-octadecane, styrene monomer, divinylbenzene mono Stir the body, initiator and nano-silicon carbide particles at a temperature of 45-65°C for 15-30 minutes to form an oil phase;

[0046](2) At the same temperature of the dispersed phase and oil phase two-phase system, add the oil phase to the dispersed phase according to the volume ratio of 1:10-1:15, stir and emulsify at a speed of 500-1000rpm for 15-30min, and then Raise the temperature to 75-90°C, and continue to stir for 3-6 hours; after the reaction, filter, wash, and dry to obtain a styrene-divinylbenzene copolymer / SiC composite shell microencapsulated phase change material;

[0047] (3), th...

Embodiment 1

[0071] In the embodiment, the phase change microcapsule material filled in the annular glass region does not add nano-silicon carbide particles.

[0072] The prepared phase change microcapsules are suction filtered, washed and dried while hot. After suction filtration, the obtained product was dried in an oven at 60° C. until constant weight. The phase-change microcapsule material is evenly filled in the annular glass regions of two glass tubes of equal length and different diameters. When filling, the nozzles of the two glass tubes are placed vertically upwards and the center lines coincide. Use a needle syringe to slowly inject water fluid into the inner glass tube of the solar collector tube until it is full. The solar heat source lamp was used for heating treatment at room temperature (25° C.) for 23 minutes, and then natural cooling treatment was carried out at room temperature (20° C.) for 23 minutes, as a cooling and heating cycle. The whole test process consists of ...

Embodiment 2

[0075] In the phase-change microcapsule material filled in the ring-shaped glass area in the embodiment, the nano-silicon carbide particles in the filled phase-change microcapsule material account for 1.5% of the mass of styrene monomer.

[0076] The prepared phase change microcapsules are suction filtered, washed and dried while hot. After suction filtration, the obtained product was dried in an oven at 60° C. until constant weight. The phase-change microcapsule material is evenly filled in the annular glass regions of two glass tubes of equal length and different diameters. When filling, the nozzles of the two glass tubes are placed vertically upwards and the center lines coincide. Use a needle syringe to slowly inject water fluid into the inner glass tube of the solar collector tube until it is full. The solar heat source lamp was used for heating treatment at room temperature (20° C.) for 23 minutes, and then natural cooling treatment was carried out at room temperature ...

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Abstract

The invention discloses a solar heat collecting tube, a preparation method of the solar heat collecting tube and a testing method of the solar heat collecting tube. The solar heat collecting tube is composed of two glass tubes which are equal in length and different in diameter, a phase change microcapsule material filled in an annular glass area and water fluid in an inner tube. Solar heat collection materials in the solar heat collection pipes are phase change microcapsules. According to the phase change microcapsule, a styrene-divinyl benzene copolymer / SiC composite material is used as a wall material, and n-octadecane is used as a core material. By utilizing the high thermal conductivity and the photo-thermal conversion characteristic of the nano silicon carbide particles and the high heat storage characteristic of the phase change core material, the solar heat collection tube has the functions of efficiently absorbing solar energy, quickly transmitting heat energy and storing and preserving heat when being irradiated by sunlight; the method has wide application prospects in the fields of solar heat collection devices, heat storage devices and green and environment-friendly energy devices.

Description

technical field [0001] The invention relates to a phase-change material and a solar heat-collecting material, in particular to a solar heat-collecting tube based on a phase-change microcapsule material, a preparation method for the solar heat-collecting tube, and a testing method for the solar heat-collecting tube. Background technique [0002] With the rapid development of society and economy, people's demand for energy is constantly increasing, especially in the more than one hundred years after the industrial revolution, the demand for energy can be said to be in short supply. Searching for renewable new energy is the development trend of modern energy. Since the 20th century, people's awareness of environmental protection has been gradually strengthened, while energy crises continue to appear, and the topic of green energy conservation is full of human life. As a clean energy with abundant reserves, solar energy has the characteristics of inexhaustibility, inexhaustibil...

Claims

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Application Information

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IPC IPC(8): F24S10/40F24S10/70F24S40/90F24S60/10F24S70/10F24S70/60
CPCF24S10/40F24S10/70F24S60/10F24S70/10F24S70/60F24S40/90F24S2070/62Y02E10/44
Inventor 王继芬赵宽
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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