Novel tower type solar heliostat and focusing method thereof

A tower type solar energy and heliostat technology, which is applied in the directions of solar thermal energy, solar thermal power generation, solar thermal collectors, etc., can solve the problems of reducing the energy flow density of the receiver, slow steering speed of the heliostat, etc., to avoid paralysis, The effect of protecting overheating and burning out and improving economy

Pending Publication Date: 2018-07-20
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

Aiming at the shortcoming of the slow turning speed of the heliostat, it is necessary to find a method that can quickly reduce the radiant energy flux density on the receiver
[0003] To sum up, there is currently no simple, convenient and reliable method that can quickly reduce the energy flux density on the receiver when the receiver is overheated

Method used

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  • Novel tower type solar heliostat and focusing method thereof

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Embodiment 1

[0021] Such as figure 1 As shown, the tower type solar heliostat of the present invention is characterized in that: a closed space, that is, a vacuum chamber 4 is formed between the back support plate 5 , the side support frame 3 and the front metal layer 2 . A vacuum port is reserved on the back support plate 5, which is connected to a small vacuum pump 10 through a connecting pipe, and is regulated and controlled by a control valve 9. When the vacuum pump 10 evacuates the vacuum chamber 4, due to the pressure difference between the inside and outside, the front metal layer 2 is slightly concave, forming a slightly concave curved surface close to a paraboloid. When the expected situation is reached, close the control valve 9 and turn off the vacuum pump 10. Since the mirror 1 is attached to the metal layer, the mirror surface 1 also forms a slightly concave curved surface, so that the reflected light can be converged to the tower receiver hundreds of meters away. The back s...

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Abstract

The invention relates to a novel tower type solar heliostat and belongs to the technical field of solar photo-thermal electricity generation application. The novel heliostat comprises a reflector, a front face metal layer, a side face supporting frame, a back face supporting disc, a molding column, a supporting structure, a driving device, a control system, a small vacuum pump, a control valve, aconnection pipeline and the like. The size of a reflection light spot of the heliostat is adjusted by vacuumizing a cavity behind the reflection face, air can enter the cavity after the control valveis opened when a receiver is overheated, the reflection face is changed from a paraboloid to a plane with extremely-short time, the radiation energy flow density on the receiver is rapidly reduced, accordingly, the receiver is protected against overheating burning, the problem that a power station stops work due to damage of the receiver is avoided, the system operation economy is greatly improved, and therefore the commercial process of tower type solar electricity generation is promoted.

Description

technical field [0001] The invention relates to a tower-type solar heliostat and a light concentrating method thereof, which belong to the technical field of application of solar thermal power generation, and are specifically used for concentrating sunlight in a tower-type solar energy system. Background technique [0002] At present, tower solar power generation is an important mode of solar thermal power generation, and it is also one of the modes with the most promising prospects for large-scale commercial application. The receiver of the tower solar power plant is located at the top of the receiving tower, and the low-temperature medium is transported to the receiver through the pump, and then flows down after being heated. During the operation of the system, the pump may fail unexpectedly. In addition, the transmission distance is long, and the pipe burst and medium leakage may also occur. As long as one of these two situations occurs, the low-temperature medium may not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24S23/70F24S40/46F24S40/52
CPCY02E10/40
Inventor 刘润宝周宇昊
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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