High-temperature vacuum tube

Abstract

The invention discloses a high-temperature vacuum tube. The vacuum tube mainly comprises flanges, an inner tube, a corrugated tube and an outer tube, wherein two ends of the inner tube and the outer tube are connected with the flanges respectively; the corrugated tube is connected with the outer tube and used for compensating swelling amount; and the inner wall of the outer tube is polished. The heat radiation of infrared band is reflected by adopting a metal surface with high finishment, so radiation heat loss is effectively reduced; and heat loss caused by air heat conduction and heat convection is inhibited by the interlayer vacuumizing design between the inner and outer tubes. The high-temperature vacuum tube inhibits radiation heat transfer at a high temperature more effectively, has good inhibiting effect on heat transfer, and effectively prevents the loss of heat during transferring.

Description

technical field [0001] The invention relates to a high-temperature vacuum tube, in particular to a high-temperature vacuum tube in the field of solar thermal power generation. Background technique [0002] In the solar thermal power generation device of the prior art, a large number of fluid pipelines for transporting high-temperature fluids are included, such as image 3 and Figure 4 As shown, the fluid pipeline 5 is composed of a large number of high-temperature heat-insulating tubes connected end to end. The high-temperature vacuum tube should have a structure that prevents the heat of the internal high-temperature fluid from being transferred to the outside, so as to effectively improve the efficiency of solar power generation. [0003] There are three basic ways to transfer heat energy: heat conduction, heat convection and heat radiation. When there is no relative displacement between the various parts of the object, the thermal energy transfer generated by the therma...

AI Technical Summary

Problems solved by technology

Therefore, the thermal conductivity of ceramic fiber insulation materials is relatively high at high temperatures, and the heat loss is relatively large. Such high-temperature insulation pipes are of poor quality.

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