Track-free two-dimensional solar light concentrating device

A solar concentrating, tracking-free technology, applied in the field of solar energy utilization, can solve the problems of high investment cost, low concentrating ratio, complex structure, etc.

Inactive Publication Date: 2012-06-27
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of complex structure, high investment cost and low concentration ratio of existing solar concentrating devices, and to provide a tracking-free modified parabolic concentrator to realize solar light collection without tracking and high concentration ratio

Method used

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  • Track-free two-dimensional solar light concentrating device
  • Track-free two-dimensional solar light concentrating device
  • Track-free two-dimensional solar light concentrating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The specific implementation is as follows:

[0020] The tracking-free two-dimensional solar concentrating device provided by the present invention is as figure 1 As shown, it includes a bracket 3, a modified parabolic reflector 1 and a vacuum heat absorbing tube 2 installed on the bracket. Modified parabolic reflector 1 selects modified parabolic function Such as figure 2 As shown in the middle curve 8, stretch the above curve along the z-axis direction for a certain distance, preferably 1000 mm in this example, and the thickness of the entire reflecting surface is between 3 mm and 5 mm, preferably 4 mm in this example, to obtain a trough-type modified parabolic reflector. Here, the length of the mirror is 1000 mm, and the opening width is 500 mm.

Embodiment 2

[0022] Choose a modified parabolic function Such as figure 2 As shown in the middle curve 9, stretch the above curve for a certain distance along the z-axis direction, preferably 1000 mm in this example, and the thickness of the entire reflecting surface is between 3 mm and 5 mm, preferably 4 mm in this example, to obtain a trough-type modified parabolic reflector. Here, the length of the mirror is 1000 mm, and the opening width is 500 mm.

[0023] In order to better illustrate that the acceptance angle of the modified parabolic reflector becomes larger, two sets of comparative examples are given below for illustration.

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Abstract

A track-free two-dimensional solar light concentrating device comprises a support, a modified parabolic reflector and a vacuum heat absorbing tube. The modified parabolic reflector is a reflecting surface, a function is adopted as a generating line, the reflecting surface is obtained by means of moving the generating line along a Z-axis direction, wherein p is a constant with a value ranging from 250 to 500, and the function is a linear function. When an incident angle formed by incident light and a y-axis is changed between 0 degree and 50 degrees, a light concentration range is three to four times larger than a circular area of the p. A light receiving angle of an integral heat collecting device is increased by means of changing the shape of the surface, and round-the-clock track-free solar energy collection is realized. The standard adjustable support is used, one-step installation is realized according to dimensions and positions, and tracking can be omitted all the year around. Compared with light concentrators such as a CPC (compound parabolic concentrator) and the like, the track-free two-dimensional solar light concentrating device is higher in concentrating ratio, simpler in manufacture and lower in cost. In addition, units of the integral heat collecting device can be connected in series or parallel in the west-east direction, and integration of a system is realized. Besides, the track-free two-dimensional solar light concentrating device can be used for solar seawater desalination, solar water heaters, solar water boilers, solar air heaters and the like.

Description

technical field [0001] The invention relates to a tracking-free two-dimensional solar concentrating device, in particular to a tracking-free concentrating heat-collecting device mechanism, which belongs to the technical field of solar energy utilization. Background technique [0002] Solar energy utilization is one of the most widely used technologies in the field of renewable energy technology with a high degree of commercialization. As a new energy source, solar energy has the advantages of green environmental protection and sustainable utilization. In solving the traditional energy crisis, solar energy utilization is a hot spot for development and research in various countries. The total annual solar radiation in my country exceeds 5,000 megajoules per square meter, and the areas with annual sunshine hours exceeding 2,200 hours account for more than 2 / 3 of the country's land area. This is the most favorable external objective condition for the development of the solar en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/12F24J2/05F24J2/24F24J2/52F24S10/40F24S10/70F24S23/71
CPCY02E10/42Y02E10/44Y02E10/47Y02A20/142
Inventor 张红霞邹成刚贾大功刘铁根张以谟
Owner TIANJIN UNIV
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