Composite foam black ceramic solar heat accumulating plate and producing method as well as production applications thereof

Abstract

The invention relates to a composite foam black ceramic solar heat accumulating plate and a producing method as well as production applications thereof. The composite foam black ceramic solar heat accumulating plate 1 is composed of a basal layer common ceramic layer 11, a middle layer foam ceramic layer 12 and a surface layer black ceramic layer 13 which are burned into a whole. The producing method provided by the invention comprises the following steps: manufacturing common ceramic powder, foam ceramic powder and black ceramic powder respectively, and carrying out material arranging for three times, drying and sintering, wherein a traditional ceramic foaming agent is added for the common ceramic powder or the ceramic polishing solid waste is used as a foaming agent for the foam ceramic powder. According to the invention, the heat accumulation function and the temperature conservation function are integrated for the composite foam black ceramic solar heat accumulating plate 1, and the heat accumulating plate 1 can be merged with construction, the price is lower, heat, hot water and refrigeration are provided for the construction, and the heat accumulating plate also can be used for power generation; and compared with the prior art, the heat accumulating plate is more simple to manufacture, is easier to install, the heat preservation effect is better, the service life is longer, and creates more favorable conditions for developing and utilizing solar energy with low cost in large scale.

Description

technical field [0001] The present invention relates to the technical field of ceramic manufacturing and application of ceramic products, in particular to ceramic plates for solar energy utilization, in particular to a composite foam black porcelain solar thermal collector plate composed of ordinary ceramic layers, foam ceramic layers and black porcelain layers And its production method and its product application. Background technique [0002] As the earth's fossil fuel resources are gradually depleted, it is an urgent task for mankind to find new large-scale alternative energy sources within a limited time. [0003] The energy of the sun is very huge, and the total amount of radiant energy to the earth's land surface is tens of thousands of times larger than the total amount of various energy sources consumed on the earth. Therefore, solar energy is one of the main ways of large-scale alternative energy sources. However, since solar energy is a low-density energy source, ...

AI Technical Summary

Problems solved by technology

However, since solar energy is a low-density energy source, a collector with a huge area is required to collect solar energy. The cost of solar energy utilization is mainly determined by the collector. The key is the cost, life, and efficiency of the collector. At present, the most widely used solar collector is the tube-sheet type Heat collectors and vacuum tube heat collectors have complex production processes, high energy consumption, high manufacturing costs, easy decline in heat collection efficiency, and short service life; at the same time, with the development of social economy, the building roof area in urban and rural A substantial increase, the solar collector must be integrated with the building in order to obtain greater development space, the existing solar collector is restricted by the material and structure of the solar collector, it is difficult to realize the integration with the building, so Traditional solar collectors cannot completely make solar energy a large-scale alternative energy source. It is necessary to find a solar collector with low price, long service life and almost no decline in heat collection efficiency for long-term use, so as to make solar energy a large-scale alternative energy source. alternative energy

In view of this, there have been various designs of ceramic solar collector plates, such as black porcelain composite ceramic solar panels (patent application No. 200710013767), manufacturing methods and application products of large-scale hollow ceramic panels (patent application No. 200710014778 ), ceramic slurry grouting molding composite ceramic solar panels (patent application number 2009100142228), etc. These technologies are based on ordinary ceramic raw materials and vanadium-titanium black porcelain or traditional black porcelain to produce black or dark hollow ceramic solar collector panels on the surface. These technologies All have the characteristics of low production cost, long service life, high heat collection efficiency and almost no attenuation after long-term use. They can be used to manufacture solar collectors, solar water heaters, and are more suitable for building ceramic solar roofs and sunny walls. On the surface, it shares the waterproof layer and thermal insulation layer with the building, and is integrated with the building, and has the same lifespan as the building. It can provide low-cost hot water, air conditioning in summer, and warm air in winter. Combined with the scale and quantity of China's existing ceramic industry, It is possible to make solar energy a large-scale alternative energy source, but there are still some problems in these technologies. The most important performance is that the heat collecting layer and the insulation layer are not fired at the same time. Although the thermal insulation materials used have relatively good thermal insulation performance, there are still some disadvantages. For example, the rock wool board has a high water absorption rate, and its thermal conductivity is small when it does not absorb water. Once it absorbs water, its thermal conductivity increases. The internal water absorption of rock wool is not easy to evaporate for a long time, which has a great influence on the thermal insulation effect of ceramic solar energy; the water absorption rate of expanded perlite products and expanded vermiculite products is also large, which leads to an increase in thermal conductivity and affects the thermal insulation effect; Urethane board and polyethylene board, although the thermal conductivity is low, but the water absorption rate is large, the expansion coefficient is also large, the dimensional stability is poor, and the fire performance is also poor, and there are aging and failure problems. There are many interfaces, the installation is troublesome, it is easy to leak, and the heat preservation effect is poor after long-term use, which is difficult to meet the needs. The above are the main problems restricting the rapid development of ceramic solar collector panels.

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