Ceramic solar plate

Abstract

This invention relates to production of multiple through-hole plate, made of mineral material, used as solar-energy collection plate. The raw materials of this inventive products are: common ceramic material, industrial slag with the total weight of transition elements compounds being more than 5%, and metallic ore with the total weight of transition elements being more then 20%. Above-mentioned raw materials are processed into mud by using ordinary method, and then extruded to produce multiple through-hole plates. The plates are connected end-to-end. Thus produced plate is then equipped with stops having outlets at its two ends, so formed is the blank of solar-energy collection plate, which is then dried, sintered to produce this inventive ceramic solar-energy plate or solar-energy plate covered with deep colour or black ceramic layer. Compared with prior art solar-energy-collection unit, such as vacuum-glass tubes or composite copper / aluminium solar-energy unit, this inventive products have advantages of: low cost, long service life and high efficiency.

Description

(1) Technical field [0001] The present invention relates to a method for utilizing solar energy, in particular to a method for manufacturing a solar heat collector, and in more detail to making ceramic solar heat collectors with ordinary ceramic raw materials, industrial waste rich in transition elements, and metal minerals as raw materials Methods. (2) Background technology [0002] Solar energy is renewable, inexhaustible, and green energy that does not harm the environment. It is also an unstable, thin, and low-density energy source. Solar light and heat utilization mainly uses solar water heaters. The key component of solar water heaters is solar heat collectors. At present, they are mainly Vacuum glass tubes and copper-aluminum composite heat collectors both have the following disadvantages: 1. High price - hundreds of yuan per square meter; 2. Short life - metals are easy to corrode, especially welds are easy to corrode, vacuum The glass tube has problems such as vacu...

AI Technical Summary

Problems solved by technology

[0002] Solar energy is renewable, inexhaustible, and green energy that does not harm the environment. It is also an unstable, thin, and low-density energy source. Solar light and heat utilization mainly uses solar water heaters. The key component of solar water heaters is solar heat collectors. At present, they are mainly Vacuum glass tubes and copper-aluminum composite heat collectors both have the following disadvantages: 1. High price - hundreds of yuan per square meter; 2. Short life - metals are easy to corrode, especially welds are easy to corrode, vacuum The glass tube has problems such as vacuum life and easy breakage of the tube body, which makes it difficult for the average life of the two to reach 10 years; 3. The average efficiency is not high-both use low-temperature coating, ①The low-temperature coating begins to age within a few years and absorbs sunlight The efficiency gradually decreases, and the average efficiency during the whole life is not high; ②The copper material is expensive, the distance between the tubes is large, and the aluminum plate absorbs solar energy and transmits it to the medium in the copper tube horizontally, with an average heat transfer distance of about 30 mm

Due to structural limitations, the gap between the vacuum glass tubes is large, and the black absorbing layer only accounts for about 50% of the structural area. The sun is strong at noon, but when the sun shines directly at noon, a large amount of sunlight passes through the gap between the tubes, which affects the heat collection efficiency.

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