Flat-plate-type air solar heat collector and production method for heat absorption plate thereof

Abstract

The invention relates to a heat collector utilizing solar energy, in particular to a flat-plate-type air solar heat collector and a production method for a heat absorption plate thereof. The heat collector comprises a frame, a transparent cover plate, a heat absorption plate and a heat preserving layer, wherein the transparent cover plate, the heat absorption plate and the heat preserving layer are sequentially installed inside the frame. The heat collector is characterized in that the heat absorption plate is in a wave shape, a separation plate, the heat preserving layer and a rear panel are sequentially installed on the back surface of the heat absorption plate, two ends of the wave-shaped heat absorption plate are respectively provided with a baffle plate for sealing, each baffle plate is provided with a hole through which air passes in and out, a certain distance is reserved between each of the two baffle plates and the correspondent frame to respectively form an air distribution passage, the frame is respectively provided with a cold air inlet pipe and a hot air exhaust pipe, and the cold air inlet pipe and the hot air exhaust pipe are communicated with the air distribution passages. The production method for the heat absorption plate comprises the steps of sand blasting and spraying of a solar absorption coating. The flat-plate-type air solar heat collector has the characteristics of large heat absorption area, reasonable structure, low production cost, high heat efficiency, capability of effectively improving the heat energy conversion rate of the flat-plate-type solar heat collector, and the like.

Description

Technical field [0001] The invention relates to a heat collector utilizing solar energy, in particular to a flat-plate air solar heat collector and a production method of a heat absorbing plate thereof. Background technique [0002] The flat plate solar collector is a heat exchanger that absorbs solar radiation energy and transfers heat to the working medium. At present, flat-panel solar collectors are mainly composed of heat-absorbing plates, shells, light-transmitting protective plates, thermal insulation materials and related parts. The heat absorbing plate is the main part of the flat solar collector to absorb solar radiation energy and transfer heat to the heat transfer medium. Since the current heat absorbing plate is basically a flat plate shape, on the one hand, the area for absorbing solar radiation energy is limited, and on the other hand On the one hand, when air is used as the working medium for heat transfer, the production cost of the existing structure is rel...

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Problems solved by technology

The heat absorbing plate is the main part of the flat solar collector to absorb solar radiation energy and transfer heat to the heat transfer medium. Since the current heat absorbing plate is basically a flat plate shape, on the one hand, the area for absorbing solar radiation energy is limited, and on the other hand On the one hand, when air is used as the working medium for heat transfer, the production cost of the existing structure is relatively high; thirdly, the current absorption rate of the heat absorbing plate for solar radiation is between 0.9 and 0.95, and the magnetron sputtering method is used to make the choice When using a non-toxic coating, the absorption rate of solar radiation can reach 0.93 to 0.95, but with the increase of the absorption rate, the emissivity also increases. The bottleneck of collectors absorbing solar radiation energy

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