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Refraction-based solar homogeneous tube reactor or dryer and its design method

A tubular reactor, dryer technology, applied in the direction of solar collectors, solar collectors, solar thermal energy using working fluid, etc. To reduce the energy loss and improve the efficiency of light and heat utilization, the problem of limited light receiving angle

Active Publication Date: 2017-04-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking the greenhouse-type solar dryer as an example, only the side facing the sun can directly expose the material to the light, and the backlight side cannot receive light, so the heat of the material is locally concentrated, which will adversely affect the quality and shape of the dried product
In addition, when sunlight hits the surface of the dryer, it will cause a large energy loss due to light reflection
To sum up, the current problems of solar reactors or dryers mainly include: (1) The surface of the reactor or dryer causes a large energy loss due to light reflection; (2) The peripheral light of the reactor or dryer The receiving angle is limited (usually the part facing the light, and the circumferential light receiving angle is ≤180°), the energy distribution is locally concentrated and uneven, and it is impossible to realize efficient solar heat utilization

Method used

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  • Refraction-based solar homogeneous tube reactor or dryer and its design method
  • Refraction-based solar homogeneous tube reactor or dryer and its design method
  • Refraction-based solar homogeneous tube reactor or dryer and its design method

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Embodiment 1

[0038] Utilize reactor or drier design and optimization method of the present invention, design has the solar energy reactor of 1 layer (N=1) light refraction medium or drier, assume that reactor or drier external diameter (D) is 4cm, the outer cover There is an anti-reflective coating to reduce the reflection loss of light. The inner diameter (d) of the dryer or reactor is 2.12cm. Under the condition of optimal light distribution, according to the formula (1):

[0039]

[0040] The thickness d of the light-refractive medium can be obtained from formula (2) 1 :

[0041]

[0042] The maximum total deflection angle α(°) of light can be obtained from formula (3):

[0043]

[0044] According to the refractive index value, the light refraction medium of this layer can be selected as extra-heavy flint glass material (refractive index 1.89), and the thickness is 0.94cm, so as to determine the geometric size and material of the reactor or dryer, and complete the solar reactor ...

Embodiment 2

[0046] Utilize the present invention to design solar reactor or drier with 2 layers (N=2) light refraction medium, assuming reactor or drier external diameter (D) is 4cm, is covered with anti-reflection film outside, reduces the reflection loss of light, The inner diameter (d) of the dryer or reactor is 2.12cm. Under the condition of optimal light distribution, according to the formula (1), it can be known that

[0047]

[0048] From this, the refractive index of the two layers of photorefractive medium can be obtained as follows:

[0049] no 2,1 n 1,0 =1.89

[0050] According to the refractive index of the material, and the refractive index of the inward second layer of photorefractive medium is higher than that of the inward first layer of photorefractive medium, n can be selected 1,0 = 1.5, n 2,1 = 1.26, so n 2,0 =1.89, an anti-reflection coating is designed between the two layers of light-refractive media to reduce the reflection loss of light. Therefore, it is de...

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Abstract

A refraction-based solar homogeneous tube reactor or drier and its design method, the reactor or drier is composed of a plurality of cylindrical transparent hollow light refraction media with a certain refractive index and a certain thickness that fit each other, and the outermost layer The outer surface of the cylindrical transparent hollow light refraction medium and the adjacent cylindrical transparent hollow light refraction medium are covered with an anti-reflection film to reduce the reflection loss of light; from the outside to the inside, the relative distance between the cylindrical transparent hollow light refraction medium and the air The refractive index increases successively; the present invention also provides the design method of the reactor or drier; the solar tube reactor or drier designed by this method can effectively reduce the reflection loss of light, and can effectively increase the solar tube type The light receiving angle in the circumferential direction of the reactor or dryer enables the area on the side of the backlight to receive light effectively, thereby optimizing the light distribution on the reactor or dryer, and further improving the uniformity of light distribution in the circumferential direction of the reactor or dryer Spend.

Description

technical field [0001] The invention relates to a solar tube reactor or dryer and a design method thereof, in particular to a solar tube reactor or dryer based on the principle of refraction, having a larger circumferential light receiving angle, and a more uniform circumferential distribution of light energy. device and its design method. Background technique [0002] Solar energy has the advantages of wide distribution, large reserves, clean and pollution-free. The high-efficiency photothermal utilization of solar energy is of great significance to solve the current world energy crisis and the resulting environmental pollution problems. [0003] Solar photocatalytic hydrogen production is an effective form of solar light utilization. Taking the composite parabolic photocatalytic hydrogen production reactor (CPC) as an example, the photocatalytic hydrogen production reaction is carried out in a circular tubular catalytic reactor, and the sunlight shines on the photocataly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24J2/24F24J2/34F24J2/50F24S10/70
CPCY02E10/44
Inventor 范亮亮赵亮赵宏杨艳
Owner XI AN JIAOTONG UNIV
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