Solar heat collecting device

Abstract

The invention discloses a reflecting-tower-bottom type solar focusing high-temperature heat collecting device, which consists of a plurality of heliostats, a reflecting tower, a rotary parabolic mirror, a conical mirror, an inverted compound parabolic mirror, a cylindrical mirror, a compound parabolic mirror and a sunlight receiver, wherein the rotary parabolic mirror, the conical mirror, the inverted compound parabolic mirror, the cylindrical mirror, the compound parabolic mirror and the sunlight receiver are arranged on a reflecting tower in sequence from top to bottom. The sunlight is focused and reflected to the tower top of the reflecting tower by the plurality of heliostats, and then is reflected again on the sunlight receiver of the tower bottom from the tower top by the rotary parabolic mirror, the conical mirror, the inverted compound parabolic mirror, the cylindrical mirror and the compound parabolic mirror so as to realize heat collection, heat storage and heat exchange at the tower bottom. The reflecting-tower-bottom type solar focusing high-temperature heat collecting device has the advantages that the load of a tower body, the power consumption and the heat loss can be reduced, the process can be simplified, and high-temperature heat storage can be convenient. The reflecting-tower-bottom type solar focusing high-temperature heat collecting device is applicable to occasions such as solar thermal power generation and high-temperature heating.

Description

technical field [0001] The invention belongs to the technical field of solar energy utilization, and in particular relates to a solar energy focusing high temperature heat collecting device. Background technique [0002] Solar energy has the advantages of being clean, non-polluting, available anywhere, and inexhaustible. The development, utilization and conversion of solar energy have become a research hotspot. In solar energy utilization technology, photothermal conversion technology is widely used. It converts solar radiation energy into thermal energy and utilizes it. Photothermal conversion can be divided into low temperature thermal utilization (<100 ℃), medium temperature thermal utilization ( 100℃~500℃) and high temperature heat utilization (>500℃). At present, low-temperature solar thermal utilization is developing rapidly, such as solar water heaters; and solar high-temperature thermal utilization technology has very broad application prospects, such as solar...

AI Technical Summary

Problems solved by technology

However, there are deficiencies in the above three kinds of solar heat collecting devices: the sunlight receiver in the existing tower type solar heat collecting device must be placed on the top of the tower, so the heat loss is large, the load on the tower body is large, and the heated medium needs to be pumped It is sent to the top of the tower for heat absorption, which consumes a lot of power and makes it difficult to store heat at high temperature

The solar receiver in the existing dish solar heat collector is placed at the focus of the rotating parabolic mirror, and the solar receiver needs to rotate with the rotating parabolic mirror to track the sun, so it is difficult to store heat at high temperature

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