Closed-loop capillary pipe plate type solar heat collector

Abstract

The invention discloses a closed loop capillary flat plate type solar heat collector, which belongs to the field of solar heat collector. The solar heat collector is characterized in that the device comprises a header tube, a fin tube, capillary metal tubes, a graphite heat transfer layer, a metal frame, plate glass and an insulation layer; the inner diameter of each capillary metal tube is between 2 and 5 millimeters, and the capillary metal tubes are connected with the fin tube to form a closed pipe system. The capillary metal tubes are filled with a heat transfer medium; during work, after absorbing solar energy, the heat transfer medium forms a vapor and liquid alternated column, enters the fin tube along the capillary metal tubes, flows back to the capillary metal tubes after being cooled down and condensed by media outside the tube, and then absorbs solar energy again for vaporization; and the cycle is repeatedly carried out. The closed loop capillary flat plate type solar heat collector has the advantages that the oscillatory flow heat pipe effect caused by the closed loop capillary metal tubes increases the heat transfer rate of the heat collector; the graphite heat transfer layer facilitates the improvement of the heat collection performance of the heat collector; and the tube diameter of each capillary metal tube is small, thereby improving the bearing capacity of the heat collection tube.

Description

technical field [0001] The invention belongs to the field of solar heat collectors, and relates to a closed-loop capillary metal tube flat-plate solar heat collector, which uses a plurality of closed-loop metal capillaries to realize solar heat collection equipment with high pressure bearing capacity, high heat collection efficiency and good heat exchange performance. Background technique [0002] Solar collectors are key equipment for various solar energy utilization systems. With the application and popularization of solar energy in our country, high temperature and high pressure solar collectors have become a new problem and technical goal in the field of solar energy development and utilization. Therefore, it is very necessary to develop solar energy with high pressure bearing capacity, high heat collection efficiency, and good thermal conductivity Heat collection technology. At present, there are two types of solar collectors: flat-plate collectors and vacuum tube coll...

AI Technical Summary

Problems solved by technology

At present, there are two types of solar collectors: flat-plate collectors and vacuum tube collectors. Due to the low heat flux density, large heat loss and low efficiency of flat-plate collectors, their working temperature is generally limited to below 100°C. At present, It can only meet people's bathing requirements. It belongs to the low-temperature heat utilization of the sun, and cannot provide high-temperature hot water and steam for industrial applications. Therefore, the promotion and application of flat-plate collectors is limited to a certain extent.

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