A Non-Imaging Secondary Reflector for Concentrating Systems
A technology of sub-reflector and condensing system, applied in directions such as mirrors, can solve problems such as uneven radiation intensity, and achieve the effect of eliminating shadow areas, improving uniformity, and uniform heat flow distribution
Inactive Publication Date: 2017-01-18
HUAZHONG UNIV OF SCI & TECH
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[0005] Aiming at the above defects or improvement requirements of the prior art, the present invention provides a non-imaging secondary reflector and its design method, aiming to solve the shadow area of the receiver caused by the secondary reflector in the concentrating system and its The problem of uneven radiation intensity
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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and examples of implementation. It should be understood that the specific implementation cases described here are only used to explain the present invention, and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0025] Secondary reflectors can be convex and concave.
[0026] The convex non-imaging secondary reflector (NIS) is shown in Fig. 2-(a), in which the NIS is installed below the focal point of the primary parabolic concentrator. The coordinates of the known points are as follows:
[0027] B ′ ( - ...
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The invention discloses a non-imaging secondary reflector for a light condensing system. Generatrix parameters of the secondary reflector are determined so that the secondary reflector can reflect light which is emitted to a primary paraboloid and is parallel to the axis and then gather the light to a receiver, and thus the light forms an evenly-distributed circular spot. The non-imaging secondary reflector is characterized in that the non-imaging secondary reflector is the convex type non-imaging secondary reflector or the concave type non-imaging secondary reflector, wherein the convex type non-imaging secondary reflector is arranged above the focus of a primary paraboloid condenser of the light condensing system, and the curved surface generatrix equation of the convex type non-imaging secondary reflector is shown in the specification; the concave type non-imaging secondary reflector is arranged below the focus of the primary paraboloid condenser of the light condensing system, and the curved surface generatrix equation of the concave type non-imaging secondary reflector is shown in the specification. The secondary reflector is used in the light condensing system and reflects sunlight, dark areas of the receiver of the light condensing system can be eliminated, and the receiver can obtain even heat flow distribution.
Description
technical field [0001] The invention belongs to the technical field of concentrating solar power generation, and specifically relates to a non-imaging secondary reflector used in a secondary concentrating system in which the primary mirror is a parabolic surface, and is suitable for concentrating photovoltaic and photoelectric systems. Background technique [0002] Secondary optical elements are widely used in optical systems. They can change the path of light incident on the primary reflector to achieve the effect of heat flow distribution with higher concentration ratio. Secondary optical elements are also one of the main components in optical system design. one. [0003] Secondary reflectors are very common components in concentrated solar power systems. Concentrating solar power generation system uses reflectors to reflect sunlight and concentrate it to the receiver, which can gather solar energy and convert it into heat energy, and use the hot steam generated by this h...
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IPC IPC(8): G02B5/10
CPCG02B5/10
Inventor 程强周正柴家乐宋金霖吴昊
Owner HUAZHONG UNIV OF SCI & TECH