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Radiation refrigeration fiber design method and radiation refrigeration fiber

A technology of radiation cooling and design method, applied in the design of radiation cooling fibers and in the field of radiation cooling fibers, which can solve the problems of complex preparation methods, high cost, and poor effect, and achieve high solar spectrum reflection efficiency, stable structure, and good visibility- Effect of near-infrared light reflectance properties

Pending Publication Date: 2020-08-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides a method for designing radiation cooling fibers and the radiation cooling fibers to overcome the problems of complex preparation methods, high costs, and poor effects in the existing radiation cooling fiber technology, and obtain radiation cooling performance and reliability. Body cooling fabric with wearable performance

Method used

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  • Radiation refrigeration fiber design method and radiation refrigeration fiber
  • Radiation refrigeration fiber design method and radiation refrigeration fiber
  • Radiation refrigeration fiber design method and radiation refrigeration fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The polymer base material is PMMA, and the micro-nano particle material is TiO 2 According to the above method, the optimal particle size of the micro-nano particles is selected as 600nm, and the volume fraction of the micro-nano particles in the fiber is determined to be 10%, so as to obtain the radiative cooling fiber, and the thickness of the fabric made of the fiber is 50 μm.

[0074] FDTD Soultions was used to construct a three-dimensional PMMA cube whose thickness was determined to be 50 μm, in which TiO with a volume fraction of 10% and a diameter of 600 nm was randomly distributed 2 particles. Using the simulation settings described in step S5, the visible-near-infrared light reflectance curve and the 7 μm-14 μm band emissivity of the fabric composed of the fibers are calculated, such as Figure 6 indicated by the dotted line.

[0075] According to the above reflectance and emissivity curves, the weighted reflectance of the corresponding solar spectrum is calc...

Embodiment 2

[0077] The polymer base material is PMMA, and the micro-nano particle material is TiO 2 According to the above method, the optimal particle size of the micro-nano particles is selected as 600nm, and the volume fraction of the micro-nano particles in the fiber is determined to be 10%, so as to obtain the radiative cooling fiber, and the thickness of the fabric made of the fiber is 100 μm.

[0078] FDTD Soultions was used to construct a three-dimensional PMMA cube whose thickness was determined to be 100 μm, in which TiO with a volume fraction of 10% and a diameter of 600 nm was randomly distributed 2 particles. Using the simulation settings described in step S5, the visible-near-infrared light reflectance curve and the 7 μm-14 μm band emissivity of the fabric composed of the fibers are calculated, such as Figure 6 shown in the dotted line, and Figure 7 shown by the solid line.

[0079] According to the above reflectance and emissivity curves, the weighted reflectance of th...

Embodiment 3

[0081] The polymer base material is PMMA, and the micro-nano particle material is TiO 2 According to the above method, the optimal particle size of the micro-nano particles is selected as 600nm, and the volume fraction of the micro-nano particles in the fiber is determined to be 10%, so as to obtain the radiative cooling fiber, and the thickness of the fabric made of the fiber is 200 μm.

[0082] A three-dimensional PMMA cube with a thickness of 200 μm was constructed using FDTD Soultions, in which TiO with a volume fraction of 10% and a diameter of 600 nm was randomly distributed 2 particles. Using the simulation settings described in step S5, the visible-near-infrared light reflectance curve and the 7 μm-14 μm band emissivity of the fabric composed of the fibers are calculated, such as Figure 6 shown by the solid line.

[0083] According to the above reflectance and emissivity curves, the weighted reflectance of the corresponding solar spectrum is calculated to be 0.96, a...

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Abstract

The invention discloses a radiation refrigeration fiber design method and a radiation refrigeration fiber. The radiation refrigeration fiber design method comprises the steps of 1, selecting micro-nano granular materials of different grain sizes within a preset range, and calculating scattering efficiency curves of the micro-nano granular materials of the different grain sizes; 2, forming multipleequivalent structures, and calculating reflectivity data, corresponding to a visible-near-infrared band, of the multiple equivalent structures; 3, according to a preset reflectivity formula, conducting fitting on the reflectivity data obtained in step 2, and conducting further extrapolation to obtain more reflectivity data; and 4, according to the reflectivity data obtained through extrapolationof step 3, calculating the weighting reflectivity, corresponding to the visible-near-infrared band, of all the equivalent structures under a preset solar spectrum, and according to the weighting reflectivity, obtaining optimal grain sizes, under different thicknesses, of micro-nano grains. By means of the design method, the optimal grain sizes of the filling nano grains are quickly determined forpreset materials within the preset fiber thickness range so that the highest solar spectrum reflection efficiency can be achieved under a preset volume percentage.

Description

technical field [0001] The invention relates to the field of radiation refrigeration, in particular to a design method of radiation refrigeration fibers and the radiation refrigeration fibers. Background technique [0002] Energy promotes the development and progress of civilization, and the modern life we ​​enjoy is all based on energy consumption. However, high energy consumption will cause excessive emissions of greenhouse gases, leading to global warming and disrupting the climate balance. Global warming not only brings extreme high temperature weather that threatens human health, but also limits the development of industrial labor and productivity. According to statistics from the US Department of Energy and the National Energy Administration, building space heating and cooling consumes 15% of the world's electricity and produces 10% of the world's greenhouse gas emissions, and is a major part of residential and commercial energy consumption. With the intensification ...

Claims

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Application Information

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IPC IPC(8): D01F6/52D01F1/10
CPCD01F1/10D01F6/52
Inventor 马耀光陶光明片思杰
Owner ZHEJIANG UNIV
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