Black ceramic metal full-flow-channel solar heat collector and manufacturing method therefor

Abstract

The invention discloses a black ceramic metal full-flow-channel solar heat collector and a manufacturing method therefor, and relates to the technical field of solar energy. Two sides of a panel are respectively provided with a collecting groove; the two collecting grooves are communicated with all heat collecting grooves; the heat collecting grooves of a bottom plate and the panel form a heat collecting flow channel; the collecting grooves of the bottom plate and the panel form a collecting flow channel; the bottom plate is fixedly welded with the concave surfaces of the heat collecting grooves of the panel; every two adjacent heat collecting grooves on the panel are welded with the bottom plate to form a flow channel welding surface; the edge of the panel and the edge of the bottom plate are welded to form a closed welding area; at least one water nozzle is arranged on each collecting flow channel; and a black ceramic sunlight absorbing layer is coated on the convex surface of each heat collecting groove of the panel. A full-flow-channel structure integrally formed by metal is adopted, a plate core is filled with a heat collection circulating medium fluid, the sunny face of the heat collection plate core is compounded with the black ceramic sunlight absorbing layer, solar light and heat are conducted to the medium fluid in the shortest transmission distance, and therefore the heat collection efficiency of the heat collector is improved.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a black ceramic metal full-channel solar heat collector and a manufacturing method thereof. Background technique [0002] In essence, the vast majority of energy on the earth comes directly or indirectly from solar energy. Solar energy is an inexhaustible and inexhaustible clean and renewable energy source. The use of solar energy is accompanied by the history of human development. Especially in recent decades, with the requirements of environmental pollution, energy shortage and carbon emission control, solar energy has developed rapidly. The development of solar energy is the demand of energy, environment, society and the times, and it is also the demand of development. [0003] At present, there are two main types of collectors for solar water heating systems: flat plate type and all-glass vacuum tube type. The heat collector is coated with sunlight absorbing material...

AI Technical Summary

Problems solved by technology

[0003] At present, there are two main types of collectors for solar water heating systems: flat plate type and all-glass vacuum tube type. The heat collector is coated with sunlight absorbing material on the outside of the inner tube, directly heats the medium in the tube, and maintains heat insulation between the inner and outer tubes by vacuuming, so its efficiency is high; copper-aluminum composite flat solar collectors generally use 6—— 10 sticks The copper tubes are evenly distributed under the aluminum plate coated with the sunlight absorbing layer, the distance between the copper tubes is between 100mm and 150mm, the copper tubes are welded and combined with the heat-absorbing aluminum plate, and the welding heat-affected zone will cause metal crystal and crystallization The change of the state forms the interface thermal resistance, and at the same time, the light and heat need to go through the transmission distance of 100mm-150mm to be transmitted to the fluid medium in the tube, both of which greatly affect the heat transmission, resulting in copper-aluminum composite flat solar collectors Reasons for inefficiency

[0004] At the same time, the sunlight absorbing layers used in both are black sunlight absorbing coatings prepared by normal temperature magnetron sputtering, coating, electroplating and other processes. The degree of aging, and even part of the film layer falling off, resulting in attenuation of sunlight absorption rate, is one of the main reasons for the efficiency and life of solar collectors

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