High-efficiency low-heat-loss non-imaging concentrating heat collector with heat storage function

Abstract

The invention provides a high-efficiency low-heat-loss non-imaging concentrating heat collector with a heat storage function. The high-efficiency low-heat-loss non-imaging concentrating heat collectorwith the heat storage function comprises a compound parabolic mirror and vacuum heat collector tubes. Each vacuum heat collector tube is composed of double layers of vacuum glass tubes comprising aninner glass tube and an outer glass tube, wherein the interval between the inner tube and the outer tube is vacuumized. A heat-conducting fin metal tube and a U-shaped heat conducting pipe are arranged in each vacuum heat collector tube, wherein the radial section of the heat conducting finned metal tube is formed in the manner that three fins are connected into an outer circle. The included angleof the three fins is 120 degrees, the inner area of the heat conducting finned metal tube is divided into three areas by the three fins, two areas store a heat exchange medium, and the other one areais filled with a heat storage medium. The U-shaped heat conducting tube is arranged in the two areas filled with the heat exchange medium, and the U-shaped heat conducting tube is fixed to the positions tangent to the midpoints of the two adjacent fins of the heat conducting finned metal tube. The high-efficiency low-heat-loss non-imaging concentrating heat collector with the heat storage function solves the problem that heat cannot be transferred by a heat absorbing medium in the heat collector tubes in time, so that the heat exchange medium in the vacuum heat collector tubes rises to be excessively high, and then the heat collector tubes burst.

Description

technical field [0001] The invention relates to the field of medium and high temperature concentrating solar heat collection, in particular to a non-imaging concentrating heat collector with high efficiency, low heat loss and heat storage. Background technique [0002] Solar collectors are the main components for collecting solar energy. There are many varieties of existing solar heat collectors, which can be divided into concentrating heat collectors and non-concentrating heat collectors according to whether they are concentrating. The thermal efficiency is greatly reduced, and the most widely used products are concentrator heat collectors. The concentrating collector products can be divided into two types according to the concentrating method: imaging concentrating collectors and non-imaging concentrating collectors. The so-called non-imaging concentrator does not produce a sun image on the heat collecting tube, and the sun's radiation is focused on the curved surface of...

AI Technical Summary

Problems solved by technology

The heat collector can effectively solve the problem that the heat cannot be removed by the heat-absorbing medium in the heat collection tube in time by filling the heat exchange medium with high thermal conductivity inside the two finned tubes with an angle of 120 degrees, which leads to vacuum heat collection The temperature of the heat exchange medium in the tube is too high to squeeze the heat collector tube, which will eventually affect the performance and service life of the heat collector product

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