Ceramic solar panel pressed by ceramic powder and provided with access pipe orifice

Abstract

The invention belongs to the solar utilization field, and particularly relates to a ceramic solar panel manufactured by a ceramic powder pressing method and a production process thereof. The thin-wall ceramic solar panel is manufactured by fully using the conventional production equipment and production capacity of the huge-scale ceramic wall floor tile industry in China. The matrix is a hollow ceramic board which is formed by combining ceramic pieces sintered by a half-box biscuit formed by pressing the ceramic powder at one time and provided with a half pipe orifice and a supporting rib; and the sunlight absorbing surface is vanadium-titanium black ceramic or traditional black ceramic or deep color ceramic. The pressed composite ceramic solar panel has low production cost, long service life and through hole flat-box structure, can realize high heat collecting efficiency, and can be used for a solar water heater, a solar roof, a solar south wall and a large-scale solar heat collecting field to provide hot water and hot air for washing, warming in winter and air conditioning in summer and provide a large amount of cheap high-temperature hot water for low-cost power generation so as to replace the conventional energy source and protect the resources and the environment.

Description

technical field [0001] The present invention relates to solar heat collectors, ceramic solar heat collectors, and black porcelain composite ceramic solar heat collectors, in particular to the use of ceramic powder pressing and molding methods to manufacture ceramic parts with inlet and outlet nozzles as the substrate, and black porcelain as the sunlight absorbing layer The black porcelain composite ceramic solar heat collector and its production process. Background technique [0002] Solar energy utilization includes photoelectric utilization and photothermal utilization. Photoelectric utilization mainly refers to solar cells, and photothermal utilization mainly refers to concentrated solar power generation devices and solar collectors. The most widely used solar collector is solar water heaters, and the key components are solar collectors. hot body. my country mainly uses vacuum glass tube solar heat collectors, while Europe, the United States, Japan, Australia and other c...

AI Technical Summary

Problems solved by technology

[0003] Solar energy is a surface energy source. Both theory and practice have proved that the most efficient solar collector is a through-hole flat box solar collector made of metal materials. In this collector, the sun-absorbing surface is covered with heat to be heated Medium, heat exchange is the most direct and rapid, and the heat conduction distance is the shortest. However, the metal material that can withstand hot water corrosion for a long time is copper. This structure requires a large amount of copper. Copper is very expensive, the weld is very long, and the manufacturing process is complicated. , the manufacturing cost is very high, it is difficult to mass-produce and use

[0004]The main disadvantage of the vacuum glass tube is: the vacuum glass tube is composed of a coaxial inner and outer glass tube, one end is closed, the vacuum is drawn between the inner and outer tubes, the outer tube is transparent, and the inner tube External surface covered with black sun absorbing coating

Because the vacuum layer, sealing ring, dustproof ring, stock, etc. must be used, the black sunlight absorbing surface only accounts for about 60% of the lighting projected area, and part of the sunlight passes through the gap between the black surfaces and is not utilized. The noon period reduces the heat collection efficiency; the vacuum degree continues to decrease during use, reducing the heat preservation effect; a closed blind pipe structure is easy to precipitate water alkali and impurities in the water, reducing the heat exchange area; the sunlight absorption rate of the sunlight absorbing coating is easy to decay , which is a common shortcoming of solar water heater sunlight absorbing coatings; the glass tube is made of borosilicate glass, the melting temperature is 1650°C, the manufacturing energy consumption is high, and the price of boron oxide is high; these shortcomings lead to high manufacturing cost and low energy consumption of vacuum glass tubes. High, relatively short service life, generally effective service life of about 10 years

[0005] The main disadvantages of the copper tube plate solar collector are: the sunlight absorption rate of the sunlight absorbing coating is easy to attenuate; the copper material is very expensive and requires electrolytic purification, and the manufacturing cost and energy consumption are high; the lateral interval of the heat collecting copper tube is large, and the heat conduction distance Far, affect the efficiency; welds are easy to corrode; the diameter of the heat collecting copper tube is relatively small, all the heat in the collector is transferred through the heat collecting copper tube The channel will be significantly reduced, which will affect the heat collection efficiency; the double circulation method needs to increase the heat exchanger, which will increase the manufacturing and use costs, and the side of the heat exchanger in contact with water is prone to fouling; the general effective service life is 10-25 years

However, the existing solar collectors have high manufacturing costs and short effective service life, which makes the cost of using solar energy much higher than conventional energy sources, which seriously restricts the development of solar collectors. Solar collectors must be integrated with buildings. In order to obtain greater development space, the existing solar collectors are restricted by the cost, materials and structure of their solar collectors, and it is difficult to achieve integration with buildings

Images