Tower type solar concentrator system and light concentrating method

Abstract

The invention provides a tower type solar concentrator system and a light concentrating method. The system comprises a heat collecting tower and a heliostat array. The heliostat array comprises n large groups of heliostats that are arranged in polar axes each having the center of the heat collecting tower as a pole thereof. The tower type solar concentrator system has the following advantages: (1) the heliostats are divided into groups for transmission and control by group, and therefore, the number of heliostat driving mechanisms and the number of controllers are reduced and then the production costs are reduced; (2) by grouping, the direction angles of the respective heliostats in the same group are controlled synchronously with a corresponding rotator driving mechanism, and the pitch angles of the respective heliostats in the same group are controlled synchronously with the corresponding heliostat driving mechanism; thus, errors in controlling the heliostats are reduced, and the light concentration accuracy and the heat collection efficiency are improved; (3) rotators and small groups of heliostats are controlled with independent driving mechanisms, so that the azimuth angles and pitch angles of the respective heliostats in the same small group of heliostats can be adjusted simultaneously; thus, the accuracy of adjustment is improved and the workload of adjustment is reduced.

Description

technical field [0001] The invention belongs to the technical field of solar tower thermal power generation, and in particular relates to a solar tower concentrating system and a concentrating method. Background technique [0002] The solar tower concentrating system is mainly composed of a large number of heliostats installed on the site and a receiver installed on the central heat collection tower of the site; the heliostat is equipped with a sun tracking mechanism, through the heliostat control system, the The transmission mechanism installed on the heliostat is controlled, and then the azimuth and elevation angles of the heliostat are adjusted to realize the precise tracking of the sun by the heliostat and reflect the sunlight to the receiver. The receiver converts the concentrated solar radiation energy into heat energy, which is then transferred to the thermodynamic cycle system to generate steam, which in turn drives a steam turbine and generator to generate electrici...

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Problems solved by technology

The main problems of this arrangement are: (1) Due to the high cost of the heliostat control system and the heliostat transmission mechanism, each heliostat is independently equipped with a set of control system and heliostat transmission mechanism, which significantly improves The overall cost of the solar tower concentrating system is reduced; (2) Since each heliostat controls the azimuth and elevation angles through an independent control system and heliostat transmission mechanism, the control of the entire mirror field to the heliostat is increased. The complexity is not conducive to high-efficiency and high-precision control of heliostats

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