Porous material solar energy air heat-collecting device
A technology of air heat collection and porous materials, which is applied to solar thermal devices, solar collectors, solar thermal energy, etc., can solve the problems of large flow resistance, complex air channel structure of collectors, etc., to reduce radiation heat loss, Simple structure and high heat collection efficiency
Inactive Publication Date: 2012-05-30
BEIJING UNIV OF TECH
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Problems solved by technology
The air channel structure of the collector is complex and the flow resistance is large
Method used
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[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0026] like figure 1 and figure 2 As shown, the uppermost end of the air heat collector is a hollow transparent cover plate 1 made of polycarbonate, and is fixed on the box body with adhesive strips. In the heat collector, the inside of the air heat collector is divided into two parts by using glue strips to fix it on the frame 5, and a porous material heat absorber 2 coated with a solar selective absorption coating is arranged on the upper surface of the substrate, which can To strengthen the radiation heat transfer process and suppress heat loss, the distance between the upper surface of the porous material heat absorber 2 and the transparent glass cover plate is very small to suppress heat loss caused by air convection. The lower surface of the heat-absorbing substrate 3 is bonded with a porous material integrated enhanced heat exchange e...
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The invention discloses a porous material solar energy air heat-collecting device which comprises a transparent cover plate, a frame, a porous material heat absorption body, a heat absorption baseplate arranged below the transparent cover plate, a porous material heat-exchange enhancement element, a back plate, an air inlet and an air outlet, wherein the upper surface of the heat absorption baseplate is attached with the surface of the porous material heat absorption body, and the lower surface thereof is attached with the base surface of the porous material integrated heat-exchange enhancement element; an air channel for air ventilation is remained between the heat absorption baseplate and the back plate; the outer side of the frame is attached with a box body made of a heat insulation material; air flows into a heat collector from an heat collector inlet under the driving of a fan, flows on the heat-exchange enhancement surface and carries out high-efficiency heat exchange with the heat-exchange enhancement surface to obtain hot air; and finally, the heated hot air flows out of a heat collector outlet. The heat-collecting device can be adopted for collecting solar energy with high efficiency to obtain the hot air, thereby satisfying the requirements for building heating as well as drying of rural grains and commercial crops.
Description
technical field [0001] The invention relates to a solar heat utilization device, in particular to a solar air heat collector device for heating air. Background technique [0002] As a sustainable and clean energy, solar energy does not need to be mined and transported over long distances. It is convenient and safe to use. It will inevitably become one of the main energy sources for human beings. In recent years, its use in buildings has attracted great attention. The energy that the earth obtains from the sun every year is as high as 6×1017KW·h, equivalent to the energy released by burning 74 trillion tons of standard coal, which is tens of thousands of times the current global annual energy consumption. The solar air collector is an important equipment in the solar heating system. It collects solar energy and converts it into heat energy. The conversion efficiency of the solar heating system mainly depends on the performance of the collector. The air collector has the foll...
Claims
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IPC IPC(8): F24J2/28F24J2/50F24J2/48F24S10/80
CPCY02E10/44
Inventor 刁彦华赵耀华于雯静
Owner BEIJING UNIV OF TECH