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Solar light condensed heat collector and method for designing solar light condensed heat collector

A technology of solar concentrating and design method, which is applied to solar collectors, solar collectors using working fluids, solar thermal energy, etc. Problems such as large temperature gradient on the pipe wall

Active Publication Date: 2013-08-21
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned problems in the prior art, and to provide a method that can avoid the large temperature gradient on the wall surface of the heat-absorbing pipe caused by the uneven distribution of the solar flux density on the surface of the heat-absorbing pipe, the local temperature of the heat-absorbing pipe wall is too high, and the A solar concentrator with a homogeneous reflector and its design method for problems such as heat pipe bending and deformation. The concentrator can obtain a relatively uniform solar flux density distribution on the surface of the heat-absorbing pipe

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  • Solar light condensed heat collector and method for designing solar light condensed heat collector
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  • Solar light condensed heat collector and method for designing solar light condensed heat collector

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Embodiment Construction

[0055] The present invention is described in detail below in conjunction with the accompanying drawings:

[0056] see Picture 1-1 , Figure 1-2 and Figure 1-3 , the solar concentrating heat collector of the present invention comprises a parabolic main reflector 1, a vacuum heat collecting tube and a homogenizing reflector 2, wherein the vacuum heat collecting tube is composed of a heat absorbing tube 3 and a glass sleeve 4 placed outside the heat absorbing tube 3 , the uniform light reflector 2 is composed of two symmetrical parabolic reflectors, and is fixed by the connecting bracket and the parabolic main reflector 1; the opening of the parabolic main reflector 1 and the homogeneous reflector 2 is arranged oppositely; as figure 2 As shown, the vacuum heat collection tube is arranged inside the focal line of the parabolic main reflector 1, so that a part of the light is directly reflected to the bottom of the heat-absorbing tube 3 after passing through the parabolic main ...

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Abstract

The invention discloses a solar light condensed heat collector and a method for designing the solar light condensed heat collector. A paraboloid main reflector is arranged. A vacuum heat collecting pipe is installed on the symmetrical axis of the cross section of the paraboloid main reflector and on the inner side of the focal line of the paraboloid main reflector. An even light reflector is installed on the outer side of the focal line of the paraboloid main reflector. The even light reflector and an opening of the paraboloid main reflector are oppositely arranged and fixedly connected. According to the solar light condensed heat collector and the method for designing the solar light condensed heat collector, the vacuum heat collecting pipe is arranged below the position of the focal line of the paraboloid main reflector, the even light reflector is additionally arranged and opposite to the opening of the paraboloid main reflector, solar radiation energy can be distributed at the bottom and the top of a heat absorption pipe, solar energy flux density distribution on the wall face of the heat absorption pipe is homogenized, the temperature gradient and the highest temperature of the wall face of the heat absorption pipe are reduced, a series of problems caused by uneven energy flux density can be avoided from the source, and safety performance of the vacuum heat collecting pipe is improved.

Description

technical field [0001] The invention belongs to the technical field of solar thermal utilization, and in particular relates to a trough-type solar concentrating collector with uniform light reflecting mirrors capable of obtaining relatively uniform solar flux density distribution on the surface of heat-absorbing pipes and improving safety performance and its design method. Background technique [0002] Trough solar thermal power generation technology is currently the most mature solar thermal power generation technology, mainly using heat transfer oil and water / steam as heat transfer fluid. No matter what kind of heat transfer fluid is used, because the traditional concentrating system focuses the solar radiation energy to the bottom of the heat absorbing tube, the distribution of solar flux density on the surface of the heat absorbing tube is extremely uneven. Due to the limited thermal conductivity of the heat-absorbing pipe wall and the convective heat transfer coefficie...

Claims

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Application Information

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IPC IPC(8): F24J2/10F24J2/24F24S23/70F24S10/70
CPCY02E10/44
Inventor 何雅玲王坤李明佳程泽东崔福庆郑章靖
Owner XI AN JIAOTONG UNIV
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