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Sunlight concentrating apparatus

a technology of concentrating apparatus and sunlight, which is applied in the direction of solar heat systems, lighting and heating apparatus, heat collector mounting/support, etc., can solve the problems of difficult to efficiently guide the sunlight emitted onto the entire reflection surface to the heat collecting part, difficult to bend the reflection surface in a generally arc shape,

Inactive Publication Date: 2016-02-11
HITACHI ZOSEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a device that can efficiently collect sunlight and concentrate it onto a specific area. This is achieved by creating a reflection surface that can bend in a curved shape. Additionally, the reflecting part includes a mirror plate and a support beam that changes in shape along the length of the part to increase its flexibility and rigidity. This results in a more efficient and effective concentration of sunlight.

Problems solved by technology

However, keeping the curvature of the reflection surface substantially constant, i.e., bending the reflection surface in a generally arc shape is not easy, and efficiently guiding the sunlight emitted onto the entire reflection surface to the heat collecting part is difficult.
Document 1 discloses a technique for providing the reflecting mirror with a concave portion to change the rigidity of the reflecting mirror in a transverse cross-sectional direction and thereby changing the degree of curve of the reflecting mirror, but even with this technique, it is not easy to bend the reflection surface in a generally arc shape.

Method used

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Examples

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Embodiment Construction

[0048]FIG. 1 is a plan view of a Fresnel solar heat collecting system 10 according to an embodiment of the present invention. In FIG. 1, X, Y, and Z directions that are orthogonal to one another are indicated by arrows (the same applies to drawings described later). The solar heat collecting system 10 includes a heat collecting part 11 in which a heating medium flows, and a plurality of (in FIG. 1, six) sunlight concentrating apparatuses 1 for concentrating sunlight onto the heat collecting part 11 to heat the heating medium in the heat collecting part 11. The heat collecting part 11 is a tubular member that is long in the Y direction. Both ends of the heat collecting part 11 are supported by a pair of strut parts 12, and the heat collecting part 11 is disposed on the +Z side of the plurality of sunlight concentrating apparatuses 1. The heating medium in the heat collecting part 11 is, for example, circulated between the heat collecting part 11 and an external electric power generat...

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Abstract

A sunlight concentrating apparatus includes a plate-like reflecting part, with an upper reflection surface extending in an axial and a width direction, and a lower surface having a central linear region fixed to a main shaft part. A pair of bending mechanisms bend the reflection surface by moving opposite end portions in a central normal direction in accordance with a rotation of the main shaft part. The reflecting part includes a mirror plate and a support plate thereon. In the support plate, the ratio between the distance in the width direction from each end portion in the width direction and the second moment of area at this distance is constant between the end portion and the central linear region, allowing the reflection surface to be bent in an are shape.

Description

TECHNICAL FIELD[0001]The present invention relates to a sunlight concentrating apparatus for concentrating sunlight onto a heat collecting part.BACKGROUND ART[0002]In recent years, solar heat collecting systems that collect solar heat energy by concentrating sunlight and heating a heating medium have been put into practical use. It is important for solar heat collecting systems to efficiently collect the solar heat energy. For example, International Publication No. 2011 / 086825 (Document 1) discloses a technique for, in a sunlight concentrating apparatus that tilts a reflecting mirror in accordance with the movement of the sun, efficiently guiding (reflected light of) sunlight to a heat collecting means by changing the degree of curve of the reflection surface in accordance with the tilting position of the reflecting mirror. More specifically, in the sunlight concentrating apparatus of Document 1, the reflecting mirror is supported at the center, and the degree of curve of the reflec...

Claims

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Application Information

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IPC IPC(8): F24S23/70F24S23/71F24S23/74F24S23/77F24S50/20
CPCF24J2/1052F24J2/38F24S23/74F24S23/745F24S23/77F24S23/82F24S25/13F24S30/425F24S2023/872F24S2030/115F24S2030/15Y02E10/47F24S23/81F24S50/20Y02E10/40
Inventor ASHIDA, SATOSHIMA, DONGHUI
Owner HITACHI ZOSEN CORP
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