Plate type solar light condensation system with invariable focal point elevation angle

Abstract

The invention discloses a plate type solar light condensation system with an invariable focal point elevation angle. The plate type solar light condensation system comprises a fixing elevation angle support, a light condensation focal point receiving module, a plurality of plate type reflecting mirrors and a sun tracking control mechanism, wherein a plurality of lens rotary shafts are arranged in the fixing elevation angle support and provided with bearing seats, the light condensation focal point receiving module is positioned on the fixing elevation angle support through support strips to enable an elevation angle of the light condensation focal point receiving module to be invariant, the plurality of plate type reflecting mirrors are stably installed on the bearing seats of the lens rotary shafts, and light condensation focal points of the plate type reflecting mirrors face the light condensation focal point receiving module. The sun tracking control mechanism comprises a sun tracking controller, a sun position sensor and a linkage adjusting device for adjusting elevation angles of the plate type reflecting mirrors. The sun tracking controller controls the linkage adjusting device to adjust elevation angles of the plate type reflecting mirrors according to data collected by the sun position sensor, enables the light condensation focal points of the plate type reflecting mirrors to always face the light condensation focal point receiving module and keeps the elevation angle of the light condensation focal point receiving module to be invariant.

Description

Technical field: [0001] The invention relates to the technical field of solar energy applications, in particular to a dish-type solar concentrating system with a constant focal elevation angle. Background technique: [0002] Global warming caused by greenhouse gas emissions has attracted more and more attention from the international community. Strengthening energy conservation and emission reduction is an important means to deal with global climate change and the challenges of resource shortage and limited environmental capacity. Solar energy, as a renewable energy source, its development and utilization Saving conventional energy, protecting the natural environment, and mitigating climate change are all of great significance. Compared with conventional energy sources, solar energy also has many advantages such as large total energy, long-term durability, universality, and no pollution. . [0003] In the existing technology, the technologies related to concentrating syste...

AI Technical Summary

Problems solved by technology

[0006] 1. High cost, difficult installation and debugging, all of which require highly professional engineering and technical personnel to complete, and the work efficiency is low

[0007] 2. The reliability of the system is low. Due to the high single-column bracket, the wind resistance is poor, which has become a fatal shortcoming of the entire dish-type concentrating system. The kinetic energy impact of the single-column bracket is large when it starts and stops, which greatly affects The service life of the reduction drive system used to drive the dish mirror to track the sun has been improved

[0008] 3. Since the focusing focus receiving module on the single-column support moves with the mirror field focus of the dish reflector, that is, the focusing focus receiving module changes with the change of the sun's altitude angle, therefore, as the focusing focus receiving module The heat collector or Stirling engine or photothermal power conversion module also changes with the change of the sun's altitude angle, which makes the center of gravity of the concentrating system constantly change (the single-column support structure is easy to deform elastically), and the rigidity requirements for the single-column support structure And the influence is also great, so the steel consumption increases and the cost increases, and higher installation accuracy is required

[0009] 4. The design of the mirror field requires that the forming precision and installation precision of the single mirror surface are very high, and the cleaning and maintenance of the mirror surface is also very troublesome due to the high clearance of the concentrating system

[0010] In addition, there are many ways to track the sun in the existing technology, but there are not many actual stable applications and promotions. The reason is that system cost and reliability, stability and tracking accuracy are the biggest problems restricting solar tracking applications: reliability and cost It is difficult to meet the requirements

Moreover, the current sunlight sensing control system uses a spherical lens to sense the focal spot or a photosensitive diode or a four-quadrant photodetector, etc., which has defects such as complex structure, high cost, small sensing error tolerance angle, and low tracking accuracy.

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