Composite cavity type solar absorber

Abstract

The invention discloses a composite cavity type solar absorber which comprises a two-layer steel shell assembly, a combined type reaction heat absorbing tube assembly, an arc-shaped bottomless circular truncated cone reflective wind screen and a glass cover. The two-layer steel shell assembly comprises a low-temperature-zone shell, a middle-temperature-zone shell and a high-temperature-zone shell which are sequentially connected through bolts; the combined type reaction heat absorbing tube assembly comprises a low-temperature-zone calandria, a middle-temperature-zone coiled tube and a high-temperature-zone calandria which are correspondingly located in the low-temperature-zone shell, the middle-temperature-zone shell and the high-temperature-zone shell respectively and tightly attached to the inner walls of the shells; the arc-shaped bottomless circular truncated cone reflective wind screen is connected with an opening of the bottom of the low-temperature-zone shell; the glass cover is arranged in a space defined by the low-temperature-zone shell and the middle-temperature-zone shell and connected with the upper portion of the arc-shaped bottomless circular truncated cone reflective wind screen. According to the composite cavity type solar absorber, the heat losses can be effectively reduced, the light-heat conversion efficiency is improved, and the heat energy is immediately converted into high-grade heat energy or chemical energy to be stored.

Description

technical field [0001] The invention relates to a cavity-type solar absorber, in particular to a flat-top conical hemispherical composite cavity-type solar absorber containing selective assembly reaction tubes used in a dish-type solar high-temperature heat utilization system. Background technique [0002] With the rapid development of science and technology in today's society, with the continuous progress and development of productivity, people's quality of life is also constantly improving, and at the same time, the demand and use of energy (such as coal and oil) have also increased significantly. At present, energy consumption continues to grow, and the contradiction between supply and demand is becoming more and more prominent. Fossil energy occupies a dominant position in the world's overall energy consumption. But fossil fuels are a kind of non-renewable energy. On the one hand, with the continuous development of the world economy, especially the rapid economic growth...

AI Technical Summary

Problems solved by technology

[0008] 4. If the heat transfer coil is too long, the heat transfer and energy storage medium has been heated up in the front part. After the temperature reaches a certain level, it will cause waste of the length of the rear tube.

The tube is connected to the shell and cannot be disassembled, and the tube cannot be replaced if there is a problem

[0009] Generally speaking, there are many types of cavity absorbers at present, but the light-to-heat conversion efficiency is not high, the manufacturing is complicated and costly, and the large-scale production has not yet been popularized, so it cannot be used on a large scale.

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