Solar photo-thermal utilization energy gathering module with convex lens array

Abstract

The invention discloses a solar photo-thermal utilization energy gathering module with a convex lens array, and belongs to the technical field of solar photo-thermal utilization. The system comprises a convex lens array energy gathering structure, the convex lens array energy gathering structure comprises a plurality of convex lenses which are connected in series or in parallel, the convex lenses which are connected in series or in parallel form a matrix structure, and focuses of the convex lenses which are connected in series or in parallel are located on the same plane; and the heat collection plate is located on one side of the convex lens array energy gathering structure, a medium circulation pipeline is arranged on the heat collection plate, a heat absorption medium circulates in the medium circulation pipeline, and the heat collection plate is used for absorbing high-temperature heat energy generated by focusing of the convex lens array energy gathering structure. The photo-thermal utilization rate can be improved, the heat loss is reduced, and meanwhile the manufacturing and using cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of solar photothermal utilization, and more specifically relates to a solar photothermal utilization energy gathering module with a convex lens array. Background technique [0002] Solar energy is the thermal radiation energy of the sun. Although the total amount of solar radiation energy reaching the earth's surface is large, due to the low energy density of solar energy, specific equipment is required to collect solar energy in order to achieve efficient and high-temperature utilization of solar energy. The current solar thermal utilization mainly has the following technical routes: [0003] 1. Low and medium temperature photothermal utilization of solar energy There are two common types of solar collectors: flat plate type and vacuum tube type. Among them, the flat plate collector has a simple structure, strong compression and impact resistance, and is suitable for pressure-bearing operation. It is very ...

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Problems solved by technology

Among them, the flat plate collector has a simple structure, strong compression and impact resistance, and is suitable for pressure-bearing operation. It is very suitable for combining with the building structure in terms of overall appearance, structural strength, installation and operation, etc. In terms of thermal performance, the heat collection temperature does not exceed 100°C, the efficiency of light and heat utilization is low, and the cost performance of input and output is not high; although the vacuum tube collector has high thermal performance, the heat collection temperature can also be close to 150°C. However, the effective lighting surface is relatively low, and problems such as pipe burst and vacuum degree reduction are prone to occur. At the same time, there are difficulties in the process of combining it with buildings.

In short, the main problems of low-temperature photothermal utilization of solar energy are: the heat collection temperature is low, and the possibility of large-scale photothermal utilization is low. Currently, it is mainly used in small-scale application systems such as household solar water heaters and solar houses.

Both of the first two power generation methods need to install tens of thousands of heliostat concave mirrors. An expensive automatic control system is used to control the heliostats to track the sun, and at the same time, the solar heat energy is focused and reflected by the heliostat concave mirrors to heat energy collection through a long route. Although the concave mirrors of the latter two methods are focused on the heat collectors at their respective focal points, a single concave mirror must be automatically controlled to track the sun. In addition, the cost of the focal heat collector of a single heliostat concave mirror is also relatively high. The heat dissipation loss of the pipeline between the collectors is also relatively large

Therefore, the current methods of high-temperature utilization of light and heat generally have the problems of high cost and heat loss, which leads to low efficiency of light-heat utilization, and the large-scale commercial application of light-heat utilization is greatly restricted.

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