Light-gathering all-glass heat pipe type evacuated solar collector tube

Abstract

The invention discloses a light-gathering all-glass heat pipe type evacuated solar collector tube, which belongs to the technical field of solar energy heat utilization. The evacuated solar collector tube comprises an internal glass tube, an external glass tube and a glass butt tube, wherein the internal glass tube and the external glass tube are sleeved together and are eccentrically arranged, one ends of the glass tubes are airtight and are hemispheric, the other ends of the glass tubes are hermetically sealed in an annular shape, the space between the internal glass tube and the external glass tube is vacuumized, the external glass tube is provided with a reflecting aluminum mirror surface, the internal glass tube is plated with a selective absorbing coating, the middle part of the internal glass tube is butted with the glass butt tube to form a glass heat tube, the glass butt tube is a condensation section, a hemispherical part of the internal glass tube connected with the glass butt tube in a sealing mode and a part close to the hemispherical part defineform an evaporation section, the hemispherical part of the internal glass tube is provided with an exhausting sealing-off nozzle of the evaporation section, and a getter is fixed at the hemispherical end part of the internal glass tube. According to the solar collector tube, a hot-water circulation path is shortened, the heat exchange efficiency is high, water in the tubes can also be utilized, and the problem that the internal glass tube is broken because the internal glass tube is too long and hot-water circulation is poor is avoided.

Description

technical field [0001] The invention relates to the technical field of solar heat utilization, in particular to a concentrating all-glass heat pipe type vacuum solar heat collecting pipe. Background technique [0002] As we all know, the all-glass vacuum solar collector tube as a whole is like an elongated thermos bile, which is composed of two inner glass tubes and outer glass tubes that are set together. The outer surface of the tube is deposited with a solar selective absorbing surface, coating or film system to form a heat absorber, so as to convert solar energy into heat energy and heat the heat transfer fluid in the inner glass tube. [0003] Existing technology one [0004] The inner glass tube and the outer glass tube in the all-glass vacuum heat collecting tube are arranged concentrically. The all-glass vacuum heat collecting tube adopts the design of single-ended opening. , and a spring clip with getter is provided, the hemispherical support of the glass tube in ...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the heat exchange efficiency of the existing technology 2 is reduced, the water in the tube cannot be used, and the heat accumulation in the lower part of the vacuum tube causes the inner glass tube to burst, the embodiment of the present invention provides a concentrating all-glass heat pipe vacuum solar collector

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