Solar air thermal collector with shutter type heat absorption plate core

Abstract

The invention relates to the technical field of solar energy utilization, in particular to a solar air thermal collector which comprises a transparent cover plate, a sealed frame, a heat-insulation layer, a sawtooth-shaped bracket of a heat receiver strip, a strip plated with an anodic oxidation selective coating, an air filtering layer, an inlet of the air thermal collector and an outlet of the air thermal collector. The solar air thermal collector is mainly used for drying occasions with high flow, low running resistance and high efficiency. Air directly flows through a channel between a heat absorption plate core and the glass cover plate, and the heat receiver formed by the shutter type heat absorption plate core and the sawtooth-shaped bracket of the heat receiver strip not only have larger heat absorption area, but also cause perturbation to the flowing of air; the perturbation has less integral resistance for the flowing of air but has sufficient heat exchange, so that heat transfer is strengthened; the shutter type heat absorption plate core and the heat receiver strip are used as the heat receiver, therefore a reflect light part projected to a next heat absorption plate core strip is absorbed by a former heat absorption plate core strip, and the reflect ratio of a heat absorption surface is reduced; in addition, the heat absorption strips can be arranged to be at different inclination angles on the sawtooth-shaped bracket according to the requirement, and the inclination angles of the bracket can also be reduced in the practical application so as to save the material of the heater collector bracket. The air filtering layer is additionally arranged at an air inlet so as to make air in the thermal collector keep as clean as possible.

Description

Technical field: [0001] The invention relates to the technical field of solar heat utilization, in particular to a solar air heat collector. Background technique: [0002] Flat-plate air collectors can be divided into permeable and non-permeable types according to the structure of the heat-absorbing plate and the internal air flow. , can not penetrate the heat-absorbing plate itself, its advantages are simple structure, small resistance, low cost, and its disadvantage is low efficiency. In order to enhance the heat transfer of air, measures such as fins can usually be added to the heat absorbing plate, but it will also increase the flow resistance; the heat absorbing plate of the permeable collector is characterized in that air can pass through the heat absorbing plate, and the heat exchange area Larger, can strengthen the heat transfer process, its advantage is higher efficiency, the disadvantage is high cost and large resistance. [0003] Compared with solar air collecto...

AI Technical Summary

Problems solved by technology

[0004] In occasions such as solar drying of granaries and grains, air collectors with high efficiency, large flow, low temperature rise and low operating resistance are generally required. Considering the operating resistance of the system, non-permeable collectors are generally used, but in traditional flat solar panels In the air collector, the air flowing through it is often taken out of the collector before being heated in high flow rate operation, and the temperature rise is too small and the efficiency is too low to meet the requirements.

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