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Refraction-based solar light homogenizing tube type reactor or dryer and design method thereof

A tubular reactor and dryer technology, which is applied to solar collectors, solar collectors, and solar thermal energy using working fluids, can solve problems such as unevenness, loss, product quality, and adverse effects on shape, and achieve The effect of uniform distribution and optimized design

Active Publication Date: 2016-01-20
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 light homogenizing tube type reactor or dryer and design method thereof
  • Refraction-based solar light homogenizing tube type reactor or dryer and design method thereof
  • Refraction-based solar light homogenizing tube type reactor or dryer and design method thereof

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Embodiment 1

[0036] 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):

[0037] n 1 , 0 = D d = 1.89

[0038] The thickness d of the light-refractive medium can be obtained from formula (2) 1 :

[0039] d 1 = D ( n 1 , 0 ...

Embodiment 2

[0044] 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

[0045] d D = 1 Π i = 1 N n i , i - 1 = 1.06 2

[0046] From this, the refractive index of the two layers of photorefractive medium can be obtained as follows: ...

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Abstract

The invention relates to a refraction-based solar light homogenizing tube type reactor or dryer and a design method thereof. The reactor or dryer is composed of a plurality of cylindrical transparent hollow light refraction media with a certain refractive index and a certain thickness in a fit manner. The position between the outer surface of the cylindrical transparent hollow light refraction medium on the outmost layer and the cylindrical transparent hollow light refraction medium adjacent to the cylindrical transparent hollow light refraction medium on the outmost layer is covered with an antireflection film used for reducing light reflection losses. The relative index of refraction of the cylindrical transparent hollow light refraction media and air is increased in sequence from outside to inside. The design method for the reactor or dryer is further provided. According to the solar tube type reactor or dryer designed through the method, light reflecting losses can be effectively reduced, meanwhile, the peripheral light receiving angle of the solar tube type reactor or dryer can be effectively increased, the area of the backlight side can effectively receive light, then light distribution on the reactor or dryer is optimized, and the distribution uniformity of light in the peripheral direction of the reactor or dryer is further improved.

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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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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