Automatic sun-tracing method and system for solar heat collector

Abstract

The invention provides a method and a system for automatically tracking sun for solar heat collectors. The system comprises an intelligent control unit, a two-quadrant photoelectric detector, a signal conditioning-amplifying circuit, an electronic control module, a servo motor, a speed reducer and a slot-type paraboloid reflecting mirror. The electronic control module provides corresponding working signal instructions for the servo motor and a brake device, and drives the slot-type paraboloid reflecting mirror to be in alignment with the sun. The invention performs closed-loop feedback-type control by taking clock program control as a main means and taking the real-time contrasting and monitoring of the two-quadrant photoelectric detector as an auxiliary means, so as to obtain stable reliable sun-tracking control effect. The invention replaces the prior oil pressure mode with a mechanical transmission mode, allows a heat collector to be more stable to rotate and position in the process of tracking light, and cannot be disturbed by external factors. In addition, as the invention does not need oil pressure stations, the invention saves construction input and is more convenient in construction.

Description

technical field [0001] The invention relates to the technical field of automatic solar tracking of a solar heat collector, in particular to a control and a mechanical transmission device of a one-dimensional automatic solar tracking system of a trough solar heat collector. Background technique [0002] With the rapid development of science and technology, many energy sources are constantly being developed and applied, and solar energy is one of the almost inexhaustible energy sources. It has attracted more and more attention from today's society, and has become an emerging energy technology field that will be developed in the future. . [0003] Traditional solar collectors use a fixed heat collection method. Due to the "cosine effect", the light-receiving heat collector plate only reaches the highest sunlight rate during a certain period of time during the sunshine period, and cannot effectively collect sunlight energy during the rest of the time. , so that the light energy...

AI Technical Summary

Problems solved by technology

However, the use of hydraulic devices has certain disadvantages. For example, a large oil pressure station must be built first, and the construction cost is high, and the telescopic oil pressure rod in the hydraulic device will be intruded by wind, sand and dust, resulting in inaccurate control of the oil pressure system. Moreover, once the oil pressure leaks a little, it will directly affect the positioning instability, and displacement will occur under the interference of external forces such as wind, which brings troubles to the implementation of the tracking system.

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