Compound condenser suitable for solar thermal utilization
A technology of solar heat and concentrators, which is applied in the field of composite concentrators, can solve the problems of high manufacturing process requirements and unfavorable industrialization promotion, and achieve the effects of increasing the spot temperature, improving the utilization rate of the lens, and increasing the concentrating area Effect
Active Publication Date: 2017-08-18
SOUTHEAST UNIV
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Problems solved by technology
Doing so can indeed greatly improve the concentration ratio, but it has high requirements for the production process, and it does not use industrial promotion
Method used
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Embodiment
[0030] Example: a traditional compound paraboloid with an opening width of 2000 mm, a heat absorbing tube diameter of 50 mm, a concentration ratio of 20, an incident angle of 30°, a height of 2599 mm, and a compound paraboloid area per unit length of 5.76 m 2 , and its area utilization rate is 35.3%. A new compound concentrator with the same opening width and light concentration ratio has a maximum incident angle of 55°, a height of 1.04m, and a compound parabolic area per unit length of 2.69m 2 , The area utilization rate is as high as 74.3%. Under the same opening area and concentration ratio, the incidence angle of the new composite concentrator is 83% larger than that of the traditional parabolic concentrator, and the area utilization rate is increased by 39%.
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The invention discloses a compound condenser suitable for solar thermal utilization. The compound condenser comprises a primary reflecting surface, a secondary reflecting surface and a tertiary reflecting surface, wherein the tertiary reflecting surface comprises two compound parabolic surfaces which are symmetric about a symmetry plane; the primary reflecting surface is circular arc-shaped, symmetric about the symmetry plane and mounted on a support; the secondary reflecting surface is mounted at the focus point of the primary reflecting surface and on the support; a heat collecting pipe is mounted at the focus point of the tertiary reflecting surface; the sunlight is incident on the primary reflecting surface through direct solar radiation to be reflected onto the secondary reflecting surface, and the reflected sunlight is further reflected into the tertiary reflecting surface to be reflected onto the heat collecting pipe after multiple times of reflection. According to the compound condenser suitable for solar thermal utilization, the conventional compound parabolic concentrating surface is intercepted, so that the incident angle is increased greatly under the condition that the concentration ratio is reduced slightly, and meanwhile the concentration ratio and the anti-wind capability of the condenser are improved.
Description
technical field [0001] The invention relates to a composite concentrator suitable for solar heat utilization, belonging to the field of solar devices. Background technique [0002] As an inexhaustible, clean and pollution-free renewable energy source, solar energy has always been a research hotspot of domestic and foreign scholars. Solar heat utilization not only has a huge consumer market, but also is an effective way to effectively reduce the consumption of traditional fossil energy such as coal and oil, and reduce environmental pollution caused by fossil energy. The solar concentrator reflects the direct radiant energy projected on the reflective surface multiple times, and reflects the low-energy-density sunlight on a large area to the outer surface of the heat-collecting tube, which increases the solar energy density, thereby increasing the spot temperature. It is a key component of solar thermal utilization. After years of development, solar concentrators have derive...
Claims
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IPC IPC(8): F24J2/12F24J2/18F24J2/10F24J2/24F24J2/46F24S10/70F24S23/70F24S23/71F24S23/79
CPCF24S10/70F24S23/70F24S23/71F24S23/82F24S80/00F24S2023/83F24S2080/01Y02E10/44
Inventor 熊源泉王淑慧
Owner SOUTHEAST UNIV